From ee59540648cfe2821ff92da6ae9c91437ee2d178 Mon Sep 17 00:00:00 2001
From: BzKevin <36381472+BzKevin@users.noreply.github.com>
Date: Mon, 4 Mar 2019 13:13:49 -0500
Subject: [PATCH 1/6] Refactored

I was having issue wit this script periodically. The original version of this was real a hack-job of Holger Klemms original. This new version utilizes tables in a manner that I hope will make the code easier to follow and understand, but also allows for certain functions to be re-used throughout (and potentially in different scripts as well). In general:

Each program (align image stack, enfuse, exiftool) how has a table that contains information about that program, this includes a sub-table that contains argument data for the program.
There is a GUI table which contains all gui elements. Those elements are split into sub-tables within GUI based on what aspect of the scrpt behavior they relate to (AIS, ENF, Target File, Presets, etc...)
These two structures (and the similarities between them) have allows me to create loops which populate the arguments from the GUI and vice-versa, this is all done through an intermediary preference, the "active" preference.
Whenever a change to a GUI element occurs the associated member of hte active preference is updated. then when it becomes time to build an argument string for a program command the active preference is read from and the value contained within is used. This works fine for all GUI elements that have a "changed" or "clicked" callback, as they can remain up-to-date real time. Sliders and Entry boxes do not have this, so at a certain point withing the script the GUI values are read directly for these elements and written to the associated active preference field.

As you will see about 50% of this code is simply building all the GUI elements and making sure that the initialization value for that element is valid (via the InRange() function). The actual heart of the program and it's functions really only takes up about 300 lines (starting at 180 and going through 476). That is broken down into multiple fairly concise functions. Hopefully this makes maintenance, feature enhancement, and troubleshooting much easier in the future.

I also made a few UI tweaks. This script use to create such a massive list of GUI elements that it was a nuisance when actually using it. They are now grouped into three containers for AIS options, Enfuse options, and target options. Only one of these options containers is displayed at a time. Additionally, I removed all the registered preferences I had before, so now I only register 3 options to enable user to point towards the program binaries.
---
 contrib/enfuseAdvanced.lua | 1849 ++++++++++++++++++------------------
 1 file changed, 932 insertions(+), 917 deletions(-)

diff --git a/contrib/enfuseAdvanced.lua b/contrib/enfuseAdvanced.lua
index 7c1edd3..6d5b3e8 100644
--- a/contrib/enfuseAdvanced.lua
+++ b/contrib/enfuseAdvanced.lua
@@ -45,7 +45,7 @@ If you have a specific set of parameters you frequently like to use, you can sav
 
 target file:
 Select your file destination path, or check the "save to source image location" option.
-Unless "Create unique filename" is check, it will overwrite existing files
+Unless "Create unique filename" is selected, it will overwrite existing files
 Set any tags or style you desire to be added to the new image (only available if the auto-import option is enabled). You can also change the defaults for this under settings > lua options
 
 format options:
@@ -54,548 +54,146 @@ Same as other export modules
 global options:
 Same as other export modules
 
-----KNOWN ISSUES----
-Cannot handle spaces in image paths on windows machienes
-Pops up multiple CMD windows on windows machienes
 ]]
 
 local dt = require "darktable"
 local df = require "lib/dtutils.file"
 local dsys = require "lib/dtutils.system"
-local gettext = dt.gettext
-local preferences_version = 1 --When releasing an update increment this number by one if changes have been made to the preferences structure that would require a re-initialization
+local du = require "lib/dtutils"
+local mod = 'module_enfuseAdvanced'
+local os_path_seperator = '/'
+if dt.configuration.running_os == 'windows' then os_path_seperator = '\\' end
 
--- works with LUA API version 5.0.0
-dt.configuration.check_version(...,{5,0,0})
+du.check_min_api_version("5.0.0", "enfuseAdvanced") 
+dt.preferences.register("executable_paths", "align_image_stack",	-- name
+	"file",	-- type
+	'enfuseAdvanced: Align Image Stack Location',	-- label
+	'Install location of align_image_stack. Requires restart to take effect.',	-- tooltip
+	"align_image_stack"	-- default
+)
+dt.preferences.register("executable_paths", "enfuse",	-- name
+	"file",	-- type
+	'enfuseAdvanced: enfuse Location',	-- label
+	'Install location of enfuse. Requires restart to take effect.',	-- tooltip
+	'enfuse'
+)
+dt.preferences.register("executable_paths", "exiftool",	-- name
+	"file",	-- type
+	'enfuseAdvanced: exiftool Location',	-- label
+	'Install location of exiftool. Requires restart to take effect.',	-- tooltip
+	"exiftool"	-- default
+)
 
--- Tell gettext where to find the .mo file translating messages for a particular domain
-gettext.bindtextdomain("enfuseAdvanced",dt.configuration.config_dir.."/lua/")
+-- INITS --
+local AIS = {
+	name = 'align_image_stack',
+	bin = '',
+	first_run = true,
+	install_error = false,
+	arg_string = '',
+	images_string = '',
+	args = {
+		radial_distortion 		= {text = '-d', 			style = 'bool'},
+		optimize_field 			= {text = '-m', 			style = 'bool'},
+		optimize_image_center 	= {text = '-i', 			style = 'bool'},
+		auto_crop				= {text = '-C', 			style = 'bool'},
+		distortion				= {text = '--distortion', 	style = 'bool'},
+		gpu						= {text = '--gpu',			style = 'bool'},
+		grid_size				= {text = '-g ', 			style = 'integer'},
+		control_points			= {text = '-c ', 			style = 'integer'},
+		control_points_remove 	= {text = '-t ', 			style = 'integer'},
+		correlation				= {text = '--corr=', 		style = 'float'}
+	}
+}
+local ENF = {
+	name = 'enfuse',
+	bin = '',
+	first_run = true,
+	install_error = false,
+	arg_string = '',
+	image_string = '',
+	args = {
+		exposure_weight 		= {text = '--exposure-weight=', 		style = 'float'},
+		saturation_weight		= {text = '--saturation-weight=', 		style = 'float'},
+		contrast_weight		 	= {text = '--contrast-weight=', 		style = 'float'},
+		exposure_optimum		= {text = '--exposure-optimum=', 		style = 'float'},
+		exposure_width			= {text = '--exposure-width=', 			style = 'float'},
+		hard_masks				= {text = '--hard-mask', 				style = 'bool'},
+		save_masks				= {text = '--save-masks', 				style = 'bool'},
+		contrast_window_size 	= {text = '--contrast-window-size=', 	style = 'integer'},
+		contrast_edge_scale		= {text = '--contrast-edge-scale=', 	style = 'float'},
+		contrast_min_curvature	= {text = '--contrast-min-curvature=', style = 'string'}
+	}
+}
+local EXF = {
+	name = 'exiftool',
+	bin = '',
+	first_run = true,
+	install_error = false
+}
+local GUI = {
+	AIS = {
+		radial_distortion 		= {},
+		optimize_field 			= {},
+		optimize_image_center 	= {},
+		auto_crop				= {},
+		distortion				= {},
+		grid_size				= {},
+		control_points			= {},
+		control_points_remove 	= {},
+		correlation				= {}},
+	ENF = {
+		exposure_weight 		= {},
+		saturation_weight		= {},
+		contrast_weight		 	= {},
+		exposure_optimum		= {},
+		exposure_width			= {},
+		hard_masks				= {},
+		save_masks				= {},
+		contrast_window_size 	= {},
+		contrast_edge_scale		= {},
+		contrast_min_curvature	= {}},
+	Target = {
+		format					= {},
+		depth					= {},  	
+		compression_level_tif	= {},
+		compression_level_jpg	= {},
+		output_compress			= {},
+		output_directory		= {},
+		source_location			= {},
+		on_conflict				= {},
+		auto_import				= {},
+		apply_style				= {},
+		copy_tags				= {},
+		add_tags				= {}},
+	Presets = {
+		current_preset		={};
+		load				={};
+		save				={};
+		variants			={};
+		variants_type		={}},
+	align					= {},
+	options_contain			= {},
+	show_options			= {}
+}
 
-local function _(msgid)
-    return gettext.dgettext("enfuseAdvanced", msgid)
-end
-
---Detect User Styles--
-styles = dt.styles
-styles_count = 1 -- "none" = 1
+local styles = dt.styles
+local styles_count = 1 -- "none" = 1
 for _,i in pairs(dt.styles) do
 	if type(i) == "userdata" then styles_count = styles_count + 1 end
 end
 
--- INITS --
-pref_style = dt.preferences.read("module_enfuseAdvanced", "style", "string")
-pref_cpytags = dt.preferences.read("module_enfuseAdvanced", "copy_tags", "bool")
-pref_addtags = dt.preferences.read("module_enfuseAdvanced", "add_tags", "string")
-if dt.configuration.running_os == "windows" then
-	os_path_seperator = "\\"
-else
-	os_path_seperator = "/"
-end
-
---Ensure Required Software is Installed--
-not_installed = 0
-dt.print_log("enfuseAdvanced - Executable Path Preference: "..df.get_executable_path_preference("align_image_stack"))
-local AIS_path = df.check_if_bin_exists("align_image_stack")
-if not AIS_path then
-	dt.print_error("align image stack not found")
-	dt.print("ERROR - align image stack not found")
-	not_installed = 1
-end
-
-dt.print_log("enfuseAdvanced - Executable Path Preference: "..df.get_executable_path_preference("enfuse"))
-local enfuse_path = df.check_if_bin_exists("enfuse")
-if not enfuse_path then
-	dt.print_error("enfuse not found")
-	dt.print("ERROR - enfuse not found")
-	not_installed = 1
-end
-
-dt.print_log("enfuseAdvanced - Executable Path Preference: "..df.get_executable_path_preference("exiftool"))
-local exiftool_path = df.check_if_bin_exists("exiftool")
-if not exiftool_path then
-	dt.print_error("exiftool not found")
-	dt.print("ERROR - exiftool not found")
-	not_installed = 1
-end
- 
-	
---Ensure proper version of Enfuse installed--
---[[
-local enfuseVersionStartCommand = enfuse_path .. " --version | " .. grep .. " \"enfuse 4.2\""
-local enfuse_version = dsys.external_command(enfuseVersionStartCommand)
-if enfuse_version ~= 0 then
-  dt.print(_('ERROR: wrong enfuse version found. the plugin works only with enfuse 4.2! please install enfuse version 4.2'))
-  not_installed = 1
-end
-]]
-
-if dt.preferences.read("enfuseAdvanced",  "pref_version", "integer") ~= preferences_version then
-	dt.print_log("enfuseAdvanced - (Re)Initializing preferences due to script load/changes detected")
-	-- align defaults
-   dt.preferences.write("enfuseAdvanced", "selected_fusion", "integer", 1)
-   dt.preferences.write("align_image_stack", "def_radial_distortion", "bool", false)
-   dt.preferences.write("align_image_stack", "def_optimize_field", "bool", false)
-   dt.preferences.write("align_image_stack", "def_optimize_image_center", "bool", true) 
-   dt.preferences.write("align_image_stack", "def_auto_crop", "bool", true) 
-   dt.preferences.write("align_image_stack", "def_distortion", "bool", true) 
-   dt.preferences.write("align_image_stack", "def_grid_size", "integer", 5)
-   dt.preferences.write("align_image_stack", "def_control_points", "integer", 8)
-   dt.preferences.write("align_image_stack", "def_control_points_remove", "integer", 3)
-   dt.preferences.write("align_image_stack", "def_correlation", "integer", 9)
-   
-   -- enfuse defaults
-   dt.preferences.write("enfuseAdvanced", "def_fusion_type", "integer", 1)
-   dt.preferences.write("enfuseAdvanced", "def_image_variants", "bool", false)
-   dt.preferences.write("enfuseAdvanced", "def_hard_masks", "bool", false) 
-   dt.preferences.write("enfuseAdvanced", "def_save_masks", "bool", false) 
-   dt.preferences.write("enfuseAdvanced", "def_contrast_window_size", "integer", 3)
-   dt.preferences.write("enfuseAdvanced", "def_contrast_edge_scale", "integer", 1)
-   dt.preferences.write("enfuseAdvanced", "def_contrast_min_curvature", "integer", 1) 
-   dt.preferences.write("enfuseAdvanced", "def_exposure_weight", "float", 1.0)
-   dt.preferences.write("enfuseAdvanced", "def_saturation_weight", "float", 0.2)
-   dt.preferences.write("enfuseAdvanced", "def_contrast_weight", "float", 0.0)
-   dt.preferences.write("enfuseAdvanced", "def_exposure_optimum_weight", "float", 0.5)
-   dt.preferences.write("enfuseAdvanced", "def_exposure_width_weight", "float",0.2)
-   dt.preferences.write("enfuseAdvanced", "selected_overwrite", "integer",1)
-   dt.preferences.write("enfuseAdvanced", "sentitiv_overwrite", "bool",true)
-   
-   -- preset DRI 1
-	temp_text = {"dri1_","dri2_","dri3_"}
-	for i,preset in pairs(temp_text) do
-		dt.preferences.write("enfuseAdvanced", preset.."hard_masks", "bool", false) 
-		dt.preferences.write("enfuseAdvanced", preset.."save_masks", "bool", false) 
-		dt.preferences.write("enfuseAdvanced", preset.."contrast_window_size", "integer", 3)
-		dt.preferences.write("enfuseAdvanced", preset.."contrast_edge_scale", "integer", 1)
-		dt.preferences.write("enfuseAdvanced", preset.."contrast_min_curvature", "integer", 1) 
-		dt.preferences.write("enfuseAdvanced", preset.."exposure_weight", "float", 1.0)
-		dt.preferences.write("enfuseAdvanced", preset.."saturation_weight", "float", 0.2)
-		dt.preferences.write("enfuseAdvanced", preset.."contrast_weight", "float", 0.0)
-		dt.preferences.write("enfuseAdvanced", preset.."exposure_optimum_weight", "float", 0.5)
-		dt.preferences.write("enfuseAdvanced", preset.."exposure_width_weight", "float",0.2)
+-- FUNCTION --
+local function InRange(test, low, high) -- tests if test value is within range of low and high (inclusive)
+	if test >= low and test <= high then
+		return true
+	else
+		return false
 	end
-   
-   -- preset DFF 1
-   	temp_text = {"dff1_","dff2_","dff3_"}
-	for i,preset in pairs(temp_text) do
-		dt.preferences.write("enfuseAdvanced", preset.."hard_masks", "bool", true) 
-		dt.preferences.write("enfuseAdvanced", preset.."save_masks", "bool", false) 
-		dt.preferences.write("enfuseAdvanced", preset.."contrast_window_size", "integer", 3)
-		dt.preferences.write("enfuseAdvanced", preset.."contrast_edge_scale", "integer", 1)
-		dt.preferences.write("enfuseAdvanced", preset.."contrast_min_curvature", "integer", 1)  
-		dt.preferences.write("enfuseAdvanced", preset.."exposure_weight", "float", 0.0)
-		dt.preferences.write("enfuseAdvanced", preset.."saturation_weight", "float", 0.0)
-		dt.preferences.write("enfuseAdvanced", preset.."contrast_weight", "float", 1.0)
-		dt.preferences.write("enfuseAdvanced", preset.."exposure_optimum_weight", "float", 0.5)
-		dt.preferences.write("enfuseAdvanced", preset.."exposure_width_weight", "float",0.2)
-	end
-   
-	-- preset FREE
-	dt.preferences.write("enfuseAdvanced", "free_hard_masks", "bool", false) 
-	dt.preferences.write("enfuseAdvanced", "free_save_masks", "bool", false) 
-	dt.preferences.write("enfuseAdvanced", "free_contrast_window_size", "integer", 3)
-	dt.preferences.write("enfuseAdvanced", "free_contrast_edge_scale", "integer", 1)
-	dt.preferences.write("enfuseAdvanced", "free_contrast_min_curvature", "integer", 1)  
-	dt.preferences.write("enfuseAdvanced", "free_exposure_weight", "float", 0.0)
-	dt.preferences.write("enfuseAdvanced", "free_saturation_weight", "float", 0.0)
-	dt.preferences.write("enfuseAdvanced", "free_contrast_weight", "float", 0.0)
-	dt.preferences.write("enfuseAdvanced", "free_exposure_optimum_weight", "float", 0.0)
-	dt.preferences.write("enfuseAdvanced", "free_exposure_width_weight", "float",0.0)
-   
-   -- output
-   dt.preferences.write("enfuseAdvanced", "selected_output_format", "integer", 1)
-   
-   --tracking
-   dt.preferences.write("enfuseAdvanced", "pref_version", "integer", preferences_version)
 end
 
---GUI
-j=0
-enf_separator1 = dt.new_widget("separator"){}
-enf_separator1b = dt.new_widget("separator"){}
-enf_separator2 = dt.new_widget("separator"){}
-enf_separator2b = dt.new_widget("separator"){}
-enf_label_align_options= dt.new_widget("section_label"){
-     label = _('image align options')
-}
-enf_label_enfuse_options= dt.new_widget("section_label"){
-     label = _('image fusion options')
-}
-enf_label_output_format= dt.new_widget("section_label"){
-     label = _('target file')
-}
-enf_label_path = dt.new_widget("label"){
-     label = _('directory'),
-     ellipsize = "start",
-     halign = "start"
-}
-enf_chkbtn_radial_distortion = dt.new_widget("check_button"){
-	label = _('optimize radial distortion for all images'),
-	value = dt.preferences.read("align_image_stack", "def_radial_distortion", "bool"),
-	tooltip = _('optimize radial distortion for all images, \nexcept for first'),
-}
-enf_chkbtn_optimize_field = dt.new_widget("check_button"){
-    label = _('optimize field of view for all images'), 
-    value = dt.preferences.read("align_image_stack", "def_optimize_field", "bool"),
-    tooltip =_('optimize field of view for all images, except for first. \nUseful for aligning focus stacks (DFF) with slightly \ndifferent magnification.'), 
-}
-enf_chkbtn_optimize_image_center = dt.new_widget("check_button"){
-    label = _('optimize image center shift for all images'), 
-    value = dt.preferences.read("align_image_stack", "def_optimize_image_center", "bool"),
-    tooltip =_('optimize image center shift for all images, \nexcept for first.'),   
-}
-enf_chkbtn_auto_crop = dt.new_widget("check_button"){
-    label = _('auto crop the image'), 
-    value = dt.preferences.read("align_image_stack", "def_auto_crop", "bool"),
-    tooltip =_('auto crop the image to the area covered by all images.'),   
-}
-enf_chkbtn_distortion = dt.new_widget("check_button"){
-    label = _('load distortion from lens database'), 
-    value = dt.preferences.read("align_image_stack", "def_distortion", "bool"),
-    tooltip =_('try to load distortion information from lens database'),   
-}
-enf_chkbtn_hard_masks = dt.new_widget("check_button"){
-    label = _('hard mask'), 
-    value = dt.preferences.read("enfuseAdvanced", "def_hard_masks", "bool"),
-    tooltip =_('force hard blend masks on the finest scale. this avoids \naveraging of fine details (only), at the expense \nof increasing the noise. this improves the \nsharpness of focus stacks considerably.\ndefault (soft mask)'),   
-    reset_callback = function(self) 
-       self.value = dt.preferences.read("enfuseAdvanced", "def_hard_masks", "bool")
-    end
-}
-enf_chkbtn_save_masks = dt.new_widget("check_button"){
-    label = _('save masks'), 
-    value = dt.preferences.read("enfuseAdvanced", "def_save_masks", "bool"),
-    tooltip =_('Save the generated weight masks to your home directory,\nenblend saves masks as 8 bit grayscale, \ni.e. single channel images. \nfor accuracy we recommend to choose a lossless format.'),  
-    reset_callback = function(self) 
-       self.value = dt.preferences.read("enfuseAdvanced", "def_save_masks", "bool")
-    end 
-}
-enf_chkbtn_cpytags = dt.new_widget("check_button"){
-    label = '  Copy Tags', 
-    value = pref_cpytags,
-    tooltip ='Copy tags from first image.',  
-}
-enf_sldr_exposure_weight = dt.new_widget("slider"){
-  label = _('exposure weight'),
-  tooltip = _('set the relative weight of the well-exposedness criterion \nas defined by the chosen exposure weight function. \nincreasing this weight relative to the others will\n make well-exposed pixels contribute more to\n the final output. \ndefault: (1.0)'),
-  hard_min = 0,
-  hard_max = 1,
-  value = dt.preferences.read("enfuseAdvanced", "def_exposure_weight", "float") --1 def
-}
-enf_sldr_saturation_weight = dt.new_widget("slider"){
-  label = _('saturation weight'),
-  tooltip = _('set the relative weight of high-saturation pixels. \nincreasing this weight makes pixels with high \nsaturation contribute more to the final output. \ndefault: (0.2)'),
-  hard_min = 0,
-  hard_max = 1,
-  value = dt.preferences.read("enfuseAdvanced", "def_saturation_weight", "float"), --0.5
-}
-enf_sldr_contrast_weight = dt.new_widget("slider"){
-  label = _('contrast weight'),
-  tooltip = _('sets the relative weight of high local-contrast pixels. \ndefault: (0.0).'),
-  hard_min = 0,
-  hard_max = 1,
-  value = dt.preferences.read("enfuseAdvanced", "def_contrast_weight", "float")--0 default
-}
-enf_sldr_exposure_optimum_weight = dt.new_widget("slider"){
-  label = _('exposure optimum'),
-  tooltip = _('determine at what normalized exposure value\n the optimum exposure of the input images\n is. this is, set the position of the maximum\n of the exposure weight curve. use this \noption to fine-tune exposure weighting. \ndefault: (0.5)'),
-  hard_min = 0,
-  hard_max = 1,
-  value = dt.preferences.read("enfuseAdvanced", "def_exposure_optimum_weight", "float")--0.5 default0
-}
-enf_sldr_exposure_width_weight = dt.new_widget("slider"){
-  label = _('exposure width'),
-  tooltip = _('set the characteristic width (FWHM) of the exposure \nweight function. low numbers give less weight to \npixels that are far from the user-defined \noptimum and vice versa. use this option to \nfine-tune exposure weighting. \ndefault: (0.2)'),
-  hard_min = 0,
-  hard_max = 1,
-  value = dt.preferences.read("enfuseAdvanced", "def_exposure_width_weight", "float") --0.2 default
-}
-enf_file_chooser_button_path = dt.new_widget("file_chooser_button"){
-    title = _('Select export path'),  -- The title of the window when choosing a file
-    is_directory = true,             -- True if the file chooser button only allows directories to be selecte
-    tooltip =_('select the target directory for the fused image. \nthe filename is created automatically.'),
-}
-enf_chkbtn_source_location = dt.new_widget("check_button"){
-    label = _('save to source image location'), 
-    value = true,
-    tooltip =_('If checked ignores the location below and saves output image(s) to the same location as the source images.'),  
-	reset_callback = function(self) 
-       self.value = true
-    end 
-}
-enf_cmbx_grid_size = dt.new_widget("combobox"){
-    label = _('image grid size'), 
-    tooltip =_('break image into a rectangular grid \nand attempt to find num control points in each section.\ndefault: (5x5)'),
-    value = dt.preferences.read("align_image_stack", "def_grid_size", "integer"), --5
-    "1", "2", "3","4","5","6","7","8","9",
-    reset_callback = function(self)
-       self.value = dt.preferences.read("align_image_stack", "def_grid_size", "integer")
-    end
-} 
-enf_cmbx_control_points = dt.new_widget("combobox"){
-    label = _('control points/grid'), 
-    tooltip =_('number of control points (per grid, see option -g) \nto create between adjacent images \ndefault: (8).'),
-    value = dt.preferences.read("align_image_stack", "def_control_points", "integer"),   --8, "1", "2", "3","4","5","6","7","8","9",
-    "1", "2", "3","4","5","6","7","8","9",             
-    reset_callback = function(self)
-       self.value = dt.preferences.read("align_image_stack", "def_control_points", "integer")
-    end
-} 
-enf_cmbx_control_points_remove = dt.new_widget("combobox"){
-    label = _('remove control points with error'), 
-    tooltip =_('remove all control points with an error higher \nthan num pixels \ndefault: (3)'),
-    value = dt.preferences.read("align_image_stack", "def_control_points_remove", "integer"), --3, "1", "2", "3","4","5","6","7","8","9",
-    "1", "2", "3","4","5","6","7","8","9",              
-    reset_callback = function(self)
-       self.value = dt.preferences.read("align_image_stack", "def_control_points_remove", "integer")
-    end
-} 
-enf_cmbx_correlation  = dt.new_widget("combobox"){
-    label = _('correlation threshold for control points'), 
-    tooltip =_('correlation threshold for identifying \ncontrol points \ndefault: (0.9).'),
-    value = dt.preferences.read("align_image_stack", "def_correlation", "integer"), --9, "0,1", "0,2", "0,3","0,4","0,5","0,6","0,7","0,8","0,9",
-    "0.1", "0.2", "0.3","0.4","0.5","0.6","0.7","0.8","0.9","1.0",     
-    reset_callback = function(self)
-       self.value = dt.preferences.read("align_image_stack", "def_correlation", "integer")
-    end
-} 
-enf_cmbx_contrast_window_size = dt.new_widget("combobox"){
-    label = _('contrast window size'), 
-    tooltip =_('set the window size for local contrast analysis. \nthe window will be a square of size × size pixels. \nif given an even size, Enfuse will \nautomatically use the next odd number.\nfor contrast analysis size values larger \nthan 5 pixels might result in a \nblurry composite image. values of 3 and \n5 pixels have given good results on \nfocus stacks. \ndefault: (5) pixels'),
-    value = dt.preferences.read("enfuseAdvanced", "def_contrast_window_size", "integer"), --3, "3","4","5","6","7","8","9","10",
-    "3", "4", "5","6","7","8","9","10",   
-} 
-enf_cmbx_contrast_edge_scale = dt.new_widget("combobox"){
-    label = _('contrast edge scale'), 
-    tooltip =_('a non-zero value for EDGE-SCALE switches on the \nLaplacian-of-Gaussian (LoG) edge detection algorithm.\n edage-scale is the radius of the Gaussian used \nin the search for edges. a positive LCE-SCALE \nturns on local contrast enhancement (LCE) \nbefore the LoG edge detection. \nDefault: (0.0) pixels.'),
-    value = dt.preferences.read("enfuseAdvanced", "def_contrast_edge_scale", "integer"), --1, "0:0:0",
-    "0.0","0.1","0.2","0.3","0.4","0.5",
-
-}  
-enf_cmbx_contrast_min_curvature = dt.new_widget("combobox"){
-    label = _('contrast min curvature'),
-    tooltip =_('define the minimum curvature for the LoG edge detection. Append a ‘%’ to specify the minimum curvature relative to maximum pixel value in the source image. Default: (0.0%)'),
-    value = dt.preferences.read("enfuseAdvanced", "def_contrast_min_curvature", "integer"), --1, "0.0%","0.1%", "0.2%", "0.3%","0.4%","0.5%","0.6%","0.7%","0.8%","0.9%","1.0%", 
-    "0.0%", "0.1%", "0.2%","0.3%","0.4%","0.5%","0.6%","0.7%","0.8%","0.9%","1.0%",   
-}  
-enf_cmbx_existing_file = dt.new_widget("combobox"){
-    label = _('on conflict'), 
-    value = dt.preferences.read("enfuseAdvanced", "selected_overwrite", "integer"), --1, 
-    sensitive= dt.preferences.read("enfuseAdvanced", "sentitiv_overwrite", "bool"), --1, 
-    _('create unique filename'),_('overwrite'),           
-    reset_callback = function(self)
-       self.value = dt.preferences.read("enfuseAdvanced", "selected_overwrite", "integer")
-    end
-}  
-enf_cmbx_style = dt.new_widget("combobox"){
-	label = "Apply Style on Import",
-	tooltip = "Apply selected style on auto-import to newly created blended image",
-	value = 1,
-	"none",
-	}
-pref_style_enum = 1
-for k=1, (styles_count-1) do
-	enf_cmbx_style[k+1] = styles[k].name
-	if styles[k].name == pref_style then pref_style_enum = k+1 end
-end
-enf_cmbx_style.value = pref_style_enum
-enf_chkbtn_image_variations = dt.new_widget("check_button"){
-    label = _('create image variants with saved presets'), 
-    value = dt.preferences.read("enfuseAdvanced", "def_image_variants", "bool"),
-    tooltip =_('creates image variants with the three \nsaved DRI or DFF presets'),   
-    sensitive=true,
-    clicked_callback = function(self) 
-		if (self.value) then
-			dt.preferences.write("enfuseAdvanced", "def_image_variants", "bool", true)
-			dt.preferences.write("enfuseAdvanced", "sentitiv_overwrite", "bool",false)
-			enf_cmbx_existing_file.value=1
-			enf_cmbx_existing_file.sensitive=false
-		else  
-		   dt.preferences.write("enfuseAdvanced", "def_image_variants", "bool", false)
-		   dt.preferences.write("enfuseAdvanced", "sentitiv_overwrite", "bool",true)
-		   enf_cmbx_existing_file.sensitive=true 
-		end    
-    end,
-    reset_callback = function(self) 
-       dt.preferences.write("enfuseAdvanced", "def_image_variants", "bool", false)
-       dt.preferences.write("enfuseAdvanced", "sentitiv_overwrite", "bool",true)
-       self.value = false
-       enf_cmbx_existing_file.sensitive=true
-    end
-
-}
-enf_button_save_preset = dt.new_widget("button"){
-	label = _('save fusion preset'),
-	tooltip =_('save the selected fusion preset'),
-	clicked_callback = function() 
-		pref_text = ""
-		if (enf_cmbx_fusion_type.value == "1 - DRI image") then
-			pref_text = "dri1_"
-		elseif (enf_cmbx_fusion_type.value == "2 - DRI image") then
-			pref_text = "dri2_"
-		elseif (enf_cmbx_fusion_type.value == "3 - DRI image") then
-			pref_text = "dri3_"
-		elseif (enf_cmbx_fusion_type.value == "1 - DFF image") then
-			pref_text = "dff1_"
-		elseif (enf_cmbx_fusion_type.value == "2 - DFF image") then
-			pref_text = "dff2_"
-		elseif (enf_cmbx_fusion_type.value == "3 - DFF image") then
-			pref_text = "dff3_"
-		elseif (enf_cmbx_fusion_type.value == "free preset") then
-			pref_text = "free_"
-		else
-			dt.print(_('unkown error'))
-		end
-		-- Write Preset
-		if pref_text ~= "" then
-			dt.preferences.write("enfuseAdvanced", pref_text.."hard_masks", "bool", enf_chkbtn_hard_masks.value) 
-			dt.preferences.write("enfuseAdvanced", pref_text.."save_masks", "bool", enf_chkbtn_save_masks.value) 
-			dt.preferences.write("enfuseAdvanced", pref_text.."contrast_window_size", "integer", enf_cmbx_contrast_window_size.selected)
-			dt.preferences.write("enfuseAdvanced", pref_text.."contrast_edge_scale", "integer", enf_cmbx_contrast_edge_scale.selected)
-			dt.preferences.write("enfuseAdvanced", pref_text.."contrast_min_curvature", "integer", enf_cmbx_contrast_min_curvature.selected) 
-			dt.preferences.write("enfuseAdvanced", pref_text.."exposure_weight", "float", enf_sldr_exposure_weight.value)
-			dt.preferences.write("enfuseAdvanced", pref_text.."saturation_weight", "float", enf_sldr_saturation_weight.value)
-			dt.preferences.write("enfuseAdvanced", pref_text.."contrast_weight", "float", enf_sldr_contrast_weight.value)
-			dt.preferences.write("enfuseAdvanced", pref_text.."exposure_optimum_weight", "float", enf_sldr_exposure_optimum_weight.value)
-			dt.preferences.write("enfuseAdvanced", pref_text.."exposure_width_weight", "float",enf_sldr_exposure_width_weight.value)
-			dt.print(_('preset '..pref_text..' saved')) 
-		end
-	end
-}
-enf_button_load_preset = dt.new_widget("button"){
-      label = _('load fusion defaults'),
-      tooltip =_('load the default fusion settings'),
-      clicked_callback = function() 
-        enf_chkbtn_hard_masks.value=dt.preferences.read("enfuseAdvanced", "def_hard_masks", "bool") 
-        enf_chkbtn_save_masks.value=dt.preferences.read("enfuseAdvanced", "def_save_masks", "bool") 
-        enf_cmbx_contrast_window_size.value=dt.preferences.read("enfuseAdvanced", "def_contrast_window_size", "integer")
-        enf_cmbx_contrast_edge_scale.value=dt.preferences.read("enfuseAdvanced", "def_contrast_edge_scale", "integer")
-        enf_cmbx_contrast_min_curvature.value=dt.preferences.read("enfuseAdvanced", "def_contrast_min_curvature", "integer")
-        enf_sldr_exposure_weight.value=dt.preferences.read("enfuseAdvanced", "def_exposure_weight", "float")
-        enf_sldr_saturation_weight.value=dt.preferences.read("enfuseAdvanced", "def_saturation_weight", "float")
-        enf_sldr_contrast_weight.value=dt.preferences.read("enfuseAdvanced", "def_contrast_weight", "float")
-        enf_sldr_exposure_optimum_weight.value=dt.preferences.read("enfuseAdvanced", "def_exposure_optimum_weight", "float")
-        enf_sldr_exposure_width_weight.value=dt.preferences.read("enfuseAdvanced", "def_exposure_width_weight", "float")
-     end
-      
-}
-enf_cmbx_output_format = dt.new_widget("combobox"){
-    label = _('file format'), 
-    value = dt.preferences.read("enfuseAdvanced", "selected_output_format", "integer"), --1, "TIFF", "JPEG", "PNG","PNM","PBM","PGM","PPM",
-    changed_callback = function(self) 
-      dt.preferences.write("enfuseAdvanced", "selected_output_format", "integer", self.selected)
-    end,
-    "TIFF", "JPEG", "PNG","PNM","PBM","PPM",            
-    reset_callback = function(self)
-       self.value = dt.preferences.read("enfuseAdvanced", "selected_output_format", "integer")
-    end
-}  
-enf_cmbx_fusion_type = dt.new_widget("combobox"){
-    label = _('fusion preset'), 
-    tooltip =_('select the preset and save the preset\n if you want to reuse it or create an image\n variant'),
-    value = 1, --dt.preferences.read("enfuseAdvanced", "def_fusion_type", "integer"), --1, "DRI image", "DFF image", "without preset",
-    changed_callback = function(self) 
-		dt.preferences.write("enfuseAdvanced", "def_fusion_type", "integer", self.selected)
-
-		if (self.value == "1 - DRI image") then
-			pref_text = "dri1_"
-		elseif (self.value == "2 - DRI image") then
-			pref_text = "dri2_"
-		elseif (self.value == "3 - DRI image") then
-			pref_text = "dri3_"
-		elseif (self.value == "1 - DFF image") then
-			pref_text = "dff1_"
-		elseif (self.value == "2 - DFF image") then
-			pref_text = "dff2_"
-		elseif (self.value == "3 - DFF image") then
-			pref_text = "dff3_"
-		elseif (self.value == "free preset") then
-			pref_text = "free_"
-		end
-		
-		if string.match(pref_text,"^dri")~=nil then
-			enf_chkbtn_hard_masks.sensitive=false
-			enf_chkbtn_hard_masks.value=false
-			enf_sldr_contrast_weight.sensitive=true
-		elseif string.match(pref_text,"^dff")~=nil then
-			enf_chkbtn_hard_masks.sensitive=false
-			enf_chkbtn_hard_masks.value=true
-			enf_sldr_contrast_weight.sensitive=false
-		else
-			enf_chkbtn_hard_masks.sensitive=true
-			enf_chkbtn_hard_masks.value=false
-			enf_sldr_contrast_weight.sensitive=true
-		end
-		
-        enf_chkbtn_hard_masks.value=dt.preferences.read("enfuseAdvanced", pref_text.."hard_masks", "bool") 
-        enf_chkbtn_save_masks.value=dt.preferences.read("enfuseAdvanced", pref_text.."save_masks", "bool") 
-        enf_cmbx_contrast_window_size.value=dt.preferences.read("enfuseAdvanced", pref_text.."contrast_window_size", "integer")
-        enf_cmbx_contrast_edge_scale.value=dt.preferences.read("enfuseAdvanced", pref_text.."contrast_edge_scale", "integer")
-        enf_cmbx_contrast_min_curvature.value=dt.preferences.read("enfuseAdvanced", pref_text.."contrast_min_curvature", "integer") 
-        enf_sldr_exposure_weight.value=dt.preferences.read("enfuseAdvanced", pref_text.."exposure_weight", "float")
-        enf_sldr_saturation_weight.value=dt.preferences.read("enfuseAdvanced", pref_text.."saturation_weight", "float")
-        enf_sldr_contrast_weight.value=dt.preferences.read("enfuseAdvanced", pref_text.."contrast_weight", "float")
-        enf_sldr_exposure_optimum_weight.value=dt.preferences.read("enfuseAdvanced", pref_text.."exposure_optimum_weight", "float")
-        enf_sldr_exposure_width_weight.value=dt.preferences.read("enfuseAdvanced", pref_text.."exposure_width_weight", "float")   
-	
-    end,
-    "1 - DRI image", "2 - DRI image","3 - DRI image","1 - DFF image", "2 - DFF image","3 - DFF image","free preset",  
-    
-    reset_callback = function(self_type)
-       enf_cmbx_fusion_type.value = dt.preferences.read("enfuseAdvanced", "def_fusion_type", "integer")
-    end
-} 
-enf_entry_tag = dt.new_widget("entry"){
-	tooltip = "Additional tags to be added on import. Seperate with commas, all spaces will be removed",
-	text = pref_addtags,
-	placeholder = "Enter tags, seperated by commas",
-	editable = true
-}
-enf_widget = dt.new_widget("box") {
-    orientation = "vertical",
-    enf_label_align_options,
-    enf_chkbtn_radial_distortion,
-    enf_chkbtn_optimize_field,
-    enf_chkbtn_optimize_image_center,
-    enf_chkbtn_auto_crop,
-    enf_chkbtn_distortion,
-    enf_cmbx_grid_size,
-    enf_cmbx_control_points,
-    enf_cmbx_control_points_remove,
-    enf_cmbx_correlation,
-    enf_separator1,
-    enf_separator1b,
-    enf_label_enfuse_options,
-    enf_cmbx_fusion_type,
-    enf_chkbtn_image_variations,
-    enf_sldr_exposure_weight,
-    enf_sldr_saturation_weight,
-    enf_sldr_contrast_weight,
-    enf_sldr_exposure_optimum_weight,
-    enf_sldr_exposure_width_weight, 
-    enf_chkbtn_hard_masks,
-    enf_chkbtn_save_masks,
-    enf_cmbx_contrast_edge_scale,
-    enf_cmbx_contrast_min_curvature,
-    enf_cmbx_contrast_window_size,
-    enf_button_save_preset,
-    enf_button_load_preset,
-    enf_separator2,
-    enf_separator2b,
-    enf_label_output_format,
-    enf_cmbx_output_format,
-    enf_label_path,
-    enf_file_chooser_button_path,
-	enf_chkbtn_source_location,
-    enf_cmbx_existing_file,
-	enf_cmbx_style,
-	enf_chkbtn_cpytags,
-	enf_entry_tag,
-}
-
--- FUNCTION -- 
-local function GetFileName(full_path)
-	--[[Parses a full path (path/filename_identifier.extension) into individual parts
-	Input: Folder1/Folder2/Folder3/Img_0001.CR2
+local function GetFileName(full_path) -- Parses a full path (path/filename_identifier.extension) into individual parts
+--[[Input: Folder1/Folder2/Folder3/Img_0001.CR2
 	
 	Returns:
 	path: Folder1/Folder2/Folder3/
@@ -612,434 +210,851 @@ local function GetFileName(full_path)
 	local extension = string.match(full_path, "%.%w*")
     return path, filename, identifier, extension
 end
-local function truncate(x)
-      return x<0 and math.ceil(x) or math.floor(x)
-end 
-local function replace_comma_to_dot(s)
-	return string.gsub(s, "%,", ".")
+
+local function CleanSpaces(text) --removes spaces from the front and back of passed in text
+	text = string.gsub(text,'^%s*','')
+	text = string.gsub(text,'%s*$','')
+	return text
 end
-local function remove_temp_files()
-	if dt.configuration.running_os == "windows" then
-		dt.print_log("enfuseAdvanced - Deleting temp files...")
-		dt.control.execute("del "..images_to_align)
-		dt.control.execute("del "..images_to_blend)
-		dt.print_log("enfuseAdvanced - Done deleting")
-	else
-		dt.print_log("enfuseAdvanced - Deleting temp files...")
-		dt.control.execute("rm "..images_to_align)
-		dt.control.execute("rm "..images_to_blend)
-		dt.print_log("enfuseAdvanced - Done deleting")
-	end
-end
-local function build_execute_command(cmd, args, file_list)
-	local result = cmd.." "..args.." "..file_list
+
+local function BuildExecuteCmd(prog_table) --creates a program command using elements of the passed in program table
+	local result = CleanSpaces(prog_table.bin)..' '..CleanSpaces(prog_table.arg_string)..' '..CleanSpaces(prog_table.images_string)
 	return result
 end
-local function copy_exif(from_file, to_file)
-	exifStartCommand = exiftool_path.." -TagsFromFile "..df.sanitize_filename(from_file).." -exif:all --subifd:all -overwrite_original "..df.sanitize_filename(to_file)
-	dt.print_log("enfuseAdvanced - EXIFTool Start Command: "..exifStartCommand)
-	resultexif=dsys.external_command(exifStartCommand)
-	if (resultexif == 0) then
-		dt.print_log("enfuseAdvanced - EXIFTool copy successful")
-		dt.print("Copied EXIF data")
-	else
-		dt.print(_('ERROR: exiftool doesn\'t work. for more informations see terminal output'))
-		dt.print_error("exif copy failed")
-	end
-end
-local function align_images()
-	dt.print(_('aligning images'))
-	
-	--Setup Align Image Stack Arguments--
-	align_args = ""
-	if (enf_chkbtn_radial_distortion.value) then align_args = align_args.." -d" end
-	if (enf_chkbtn_optimize_field.value) then align_args = align_args.." -m" end  
-	if (enf_chkbtn_optimize_image_center.value) then align_args = align_args.." -i" end
-	if (enf_chkbtn_auto_crop.value) then align_args = align_args.." -C" end     
-	if (enf_chkbtn_distortion.value) then align_args = align_args.." --distortion" end
-	align_args = align_args.." -g "..enf_cmbx_grid_size.value
-	align_args = align_args.." -c "..enf_cmbx_control_points.value          
-	align_args = align_args.." -t "..enf_cmbx_control_points_remove.value
-	align_args = align_args.." --corr="..enf_cmbx_correlation.value
-	if (dt.preferences.read("module_enfuseAdvanced", "align_use_gpu", "bool")) then align_args = align_args.." --gpu" end
-	align_args = align_args.." -a "..df.sanitize_filename(first_path.."aligned_")..' '
-	alignStartCommand = build_execute_command(AIS_path, align_args, images_to_align)
-	dt.print_log("enfuseAdvanced - Align Start Command: "..alignStartCommand)
-	resp = dsys.external_command(alignStartCommand)
-	dt.print_log("enfuseAdvanced - Completed Align")
-	return resp
-end
-local function blend_images()
-	blend_args = ""
-	if from_preset then --load args from preset preferences
-		blend_args=blend_args.." --exposure-weight="..(replace_comma_to_dot(dt.preferences.read("enfuseAdvanced", preset_text.."_exposure_weight", "float")))
-		blend_args=blend_args.." --saturation-weight="..(replace_comma_to_dot(dt.preferences.read("enfuseAdvanced", preset_text.."_saturation_weight", "float"))) 
-		blend_args=blend_args.." --contrast-weight="..(replace_comma_to_dot(dt.preferences.read("enfuseAdvanced", preset_text.."_contrast_weight", "float")))
-		blend_args=blend_args.." --exposure-optimum="..(replace_comma_to_dot(dt.preferences.read("enfuseAdvanced", preset_text.."_exposure_optimum_weight", "float")))
-		blend_args=blend_args.." --exposure-width="..(replace_comma_to_dot(dt.preferences.read("enfuseAdvanced", preset_text.."_exposure_width_weight", "float")))
-		if (enf_chkbtn_hard_masks.value) then blend_args=blend_args.."--hard-mask" end
-		if (enf_chkbtn_save_masks.value) then blend_args=blend_args.."--save-masks" end
-		blend_args=blend_args.." --contrast-window-size="..dt.preferences.read("enfuseAdvanced", preset_text.."_contrast_window_size", "integer")
-		blend_args=blend_args.." --contrast-edge-scale="..dt.preferences.read("enfuseAdvanced", preset_text.."_contrast_edge_scale", "integer")
-		blend_args=blend_args.." --contrast-min-curvature="..dt.preferences.read("enfuseAdvanced", preset_text.."_contrast_min_curvature", "integer")
-		blend_args=blend_args.." --depth="..dt.preferences.read("module_enfuseAdvanced", "image_color_depth", "enum")
-	else --load args from GUI values
-		blend_args = blend_args.." --exposure-weight="..(replace_comma_to_dot(enf_sldr_exposure_weight.value))
-		blend_args = blend_args.." --saturation-weight="..(replace_comma_to_dot(enf_sldr_saturation_weight.value))            
-		blend_args = blend_args.." --contrast-weight="..(replace_comma_to_dot(enf_sldr_contrast_weight.value))
-		blend_args = blend_args.." --exposure-optimum="..(replace_comma_to_dot(enf_sldr_exposure_optimum_weight.value))
-		blend_args = blend_args.." --exposure-width="..(replace_comma_to_dot(enf_sldr_exposure_width_weight.value))
-		if (enf_chkbtn_hard_masks.value) then blend_args = blend_args.." --hard-mask" end
-		if (enf_chkbtn_save_masks.value) then blend_args = blend_args.." --save-masks" end
-		blend_args = blend_args.." --contrast-window-size="..enf_cmbx_contrast_window_size.value
-		blend_args = blend_args.." --contrast-edge-scale="..enf_cmbx_contrast_edge_scale.value
-		blend_args = blend_args.." --contrast-min-curvature="..enf_cmbx_contrast_min_curvature.value
-		blend_args = blend_args.." --depth="..dt.preferences.read("module_enfuseAdvanced", "image_color_depth", "enum")
-	end
-	
-	--set output format per GUI selection
-	if (enf_cmbx_output_format.value == "TIFF") then
-		cmd_suffix_output_format="tif"
-		blend_args = blend_args.." --compression="..dt.preferences.read("module_enfuseAdvanced", "compression_tiff", "enum")
-	elseif (enf_cmbx_output_format.value == "JPEG") then
-		cmd_suffix_output_format="jpg"
-		blend_args = blend_args.." --compression="..truncate(dt.preferences.read("module_enfuseAdvanced", "compression_jpeg", "integer"))
-	elseif (enf_cmbx_output_format.value == "PNG") then
-		cmd_suffix_output_format="png"
-	elseif (enf_cmbx_output_format.value == "PNM") then
-		cmd_suffix_output_format="pnm"     
-	elseif (enf_cmbx_output_format.value == "PBM") then
-		cmd_suffix_output_format="pbm"   
-	elseif (enf_cmbx_output_format.value == "PPM") then
-		cmd_suffix_output_format="ppm"
-	end
 
-	--Set output path and add filename
-	if (enf_chkbtn_source_location.value) then
-		cmd_output_path = enf_source_path
-	else
-	cmd_output_path=enf_file_chooser_button_path.value 
-	end
-	path_with_filename = cmd_output_path..os_path_seperator..first_filename.."-"..last_id.."."..cmd_suffix_output_format
-	
-	--Create unique name with index if GUI selection create unique name (don't overwrite), also do this if user selected to make variants from presets
-	if (enf_cmbx_existing_file.selected == 1) or (from_preset) then
-		path_with_filename = df.create_unique_filename(path_with_filename)
-	end
-	
-	cmd_output_image = " --output="..df.sanitize_filename(path_with_filename)
-	blend_args = blend_args..cmd_output_image
-
-	images_to_blend = ""
-	for j=0, counted_images-1 do
-		if j < 10 then
-			id = "000"..tostring(j)
-		else
-			id = "00"..tostring(j)
+local function PreCall(prog_tbls) --looks to see if this is the first call, if so checks to see if program is installed properly
+	for _,prog in pairs(prog_tbls) do
+		if prog.first_run then
+			prog.bin = df.check_if_bin_exists(prog.name)
+			if not prog.bin then 
+				prog.install_error = true
+			else
+				prog.bin = CleanSpaces(prog.bin)
+			end
+			prog.first_run = false
 		end
-		--[[if dt.configuration.running_os == "windows" then
-			images_to_blend = images_to_blend..first_path.."aligned_"..id..".tif "
-		else
-			images_to_blend = images_to_blend..'"'..first_path.."aligned_"..id..".tif"..'" '
-		end]]
-		images_to_blend = images_to_blend..first_path.."aligned_"..id..".tif "
 	end
-	BlendStartCommand=build_execute_command(enfuse_path, blend_args, images_to_blend)
-	
-	dt.print_log("enfuseAdvanced - Blend Start Command: "..BlendStartCommand)
-	resultBlend=dsys.external_command(BlendStartCommand)
-	dt.print_log("enfuseAdvanced - Completed Blend")
+end
 
-	return resultBlend, path_with_filename
-end
-local function show_status(enf_storage, image, format, filename, --Store: Called on each exported image
-  number, total, high_quality, extra_data)
-     dt.print(_('export TIFF for image fusion ')..tostring(truncate(number)).." / "..tostring(truncate(total)))   
-end
-local function create_image_fusion(enf_storage, image_table, extra_data) --Finalize: Called once when all images are done exporting	
---Create Images String--
-	images_to_align = ""
-	images_to_blend = ""
-	counted_images=0
-	first_id = "999999999999999999999999"
-	last_id = "0"
-	for source_image,image_path in pairs(image_table) do
-		counted_images=counted_images+1
-		--[[if dt.configuration.running_os == "windows" then
-			images_to_align = images_to_align..image_path..' '
-		else
-			images_to_align = images_to_align..'"'..image_path..'" '
-		end]]
-		images_to_align = images_to_align..df.sanitize_filename(image_path)..' '
-		curr_path, curr_filename, curr_id, curr_ext = GetFileName(image_path)
-		if (curr_id < first_id) then 
-			first_path = curr_path
-			first_filename = curr_filename
-			first_id = curr_id
-			first_ext = curr_ext
-			dt_source_image = source_image
-		end 
-		if (curr_id > last_id) then 
-			last_path = curr_path
-			last_filename = curr_filename
-			last_id = curr_id
-			last_ext = curr_ext
+local function GetArgsFromPreference(prog_table, prefix) --for each arg in a program table reads in the associated value in the active preference (which is continually updated via clicked/changed callback in GUI elements
+	prog_table.arg_string = ''
+	for argument, arg_data in pairs(prog_table.args) do
+		local temp = dt.preferences.read(mod, prefix..argument, arg_data.style)
+		if arg_data.style == 'bool' and temp then
+			prog_table.arg_string = prog_table.arg_string..arg_data.text..' '
+		elseif arg_data.style == 'integer' or arg_data.style == 'string' then
+			prog_table.arg_string = prog_table.arg_string..arg_data.text..temp..' '
+		elseif arg_data.style == 'float' then
+			temp = string.sub(tostring(temp),1,3)
+			prog_table.arg_string = prog_table.arg_string..arg_data.text..temp..' '
 		end
-		enf_source_path = source_image.path
-		exif_source_file = source_image.path..os_path_seperator..source_image.filename
 	end
+	prog_table.arg_string = CleanSpaces(prog_table.arg_string)
+	return prog_table.arg_string
+end
 
---Check if at least 2 images selected--
-	if (counted_images<=1) then
-		dt.print(_('ERROR: not enough pictures selected. please select two or more images\nfrom the same object, but with different camera settings.'))
-		dt.print_error("Not enough pictures selected")
-		remove_temp_files()
-		return
+local function UpdateAISargs(image_table, images_to_remove) --updates the AIS arguments, builds the input image string, returns a modified image table which contains the aligned image names in place of the exported image names also updates the images to remove string with new aligned images and a string of the images to align
+	GetArgsFromPreference(AIS, 'active_')
+	local source_path = ''
+	local images_to_align = ''
+	local index = 0
+	for raw, temp_image in pairs(image_table) do
+		local index_str = ''
+		source_path = GetFileName(temp_image)
+		images_to_align = images_to_align..df.sanitize_filename(temp_image)..' '
+		if InRange(index,0,9) then index_str = '000'..tostring(index)
+		elseif InRange(index,10,99) then index_str = '00'..tostring(index)
+		end
+		image_table[raw] = source_path..'aligned_'..index_str..'.tif'
+		images_to_remove = images_to_remove..df.sanitize_filename(image_table[raw])..' '
+		index = index + 1
 	end
-
---Ensure Proper Software Installed--
-	if not_installed == 1 then
-		dt.print_log("enfuseAdvanced - Required software not found")
-		dt.print("Required software not found")
-		remove_temp_files()
-		return
-	end	
-
---Check that output path selected
-	cmd_output_path = enf_file_chooser_button_path.value
-	if (cmd_output_path == nil) and not(enf_chkbtn_source_location.value) then
-		dt.print(_('ERROR: no target directory selected'))
-		remove_temp_files()
-		return
-	end
-
-	dt.print_log("enfuseAdvanced - Starting Image Fusion")
-	job = dt.gui.create_job(_('Creating DRI/DFF image'), true, stop_selection)
+	source_path = df.sanitize_filename(source_path..'aligned_')
+	AIS.arg_string = AIS.arg_string..' -a '..source_path
+	images_to_align = CleanSpaces(images_to_align)
 	
-	percent_step = .33
-	if (enf_chkbtn_image_variations.value) then percent_step = .2 end
-	job.percent = job.percent + percent_step
+	return image_table, images_to_remove, images_to_align
+end
+
+local function UpdateENFargs(image_table, prefix) --updates the Enfuse arguments, builds the input image string, generates output filename, returns string of images to blend, the name of the outout image, and the first raw image object
+	GetArgsFromPreference(ENF, prefix)
+	local images_to_blend = ''
+	local out_path = ''
+	local out_name = ''
+	local smallest_name = ''
+	local smallest_id = math.huge
+	local largest_id = 0
+	local first_raw = {}
+	for raw, temp_image in pairs(image_table) do
+		_, source_name, source_id = GetFileName(raw.filename)
+		source_id = tonumber(source_id)
+		if source_id < smallest_id then 
+			smallest_id = source_id
+			smallest_name = source_name
+			first_raw = raw
+		end
+		if source_id > largest_id then largest_id = source_id end
+		out_path = raw.path
+		images_to_blend = images_to_blend..df.sanitize_filename(temp_image)..' '
+	end
+	ENF.arg_string = ENF.arg_string..' --depth='..GUI.Target.depth.value..' '
+	if GUI.Target.format.value == "tif" then ENF.arg_string = ENF.arg_string..'--compression='..GUI.Target.compression_level_tif.value..' '
+	elseif GUI.Target.format.value == "jpg" then ENF.arg_string = ENF.arg_string..'--compression='..GUI.Target.compression_level_jpg.value..' '
+	end
+	if not GUI.Target.source_location.value then out_path = GUI.Target.output_directory.value end
+	out_name = smallest_name..'-'..largest_id
+	out_path = out_path..os_path_seperator..out_name..'.'..GUI.Target.format.value
+	if GUI.Target.on_conflict.value == 'create unique filename' then out_path = df.create_unique_filename(out_path) end
+	ENF.arg_string = ENF.arg_string..'--output='..df.sanitize_filename(out_path)
+	images_to_blend = CleanSpaces(images_to_blend)
 	
---Align Images--
-	resultalign = align_images()
-	if (resultalign ~= 0) then --Aling Image Stack Failed-- 
-		dt.print(_('ERROR: align_image_stack doesn\'t work. For more information see terminal output'))
-		dt.print_error("Align Image Stack Failed")
-		remove_temp_files()
+	return images_to_blend, out_path, first_raw
+end
+
+local function UpdateActivePreference() --sliders & entry boxes do not have a click/changed callback, so their values must be saved to the active preference 'manually'
+	local enf = {'exposure_weight','saturation_weight','contrast_weight','exposure_optimum','exposure_width'}
+	for _,descriptor in pairs(enf) do
+		temp = GUI.ENF[descriptor].value
+		dt.preferences.write(mod, 'active_'..descriptor, 'float', temp)
+	end
+	temp = GUI.Target.compression_level_jpg.value
+	temp = math.floor(temp)
+	dt.preferences.write(mod, 'active_compression_level_jpg', 'integer', temp)
+	temp = GUI.Target.add_tags.text
+	dt.preferences.write(mod, 'active_add_tags', 'string', temp)
+end
+
+local function SaveToPreference(preset) --save the present values of enfuse GUI elements to the specified "preset"
+	UpdateActivePreference()
+	for argument, arg_data in pairs(ENF.args) do
+		local temp
+		if argument == 'contrast_window_size' or argument == 'contrast_edge_scale' or argument == 'contrast_min_curvature' then	--comboboxes must be handled specially via an index value
+			temp = dt.preferences.read(mod, 'active_'..argument..'_ind', 'integer')
+			dt.preferences.write(mod, preset..argument..'_ind', 'integer', temp)
+			temp = dt.preferences.read(mod, 'active_'..argument, arg_data.style)
+			dt.preferences.write(mod, preset..argument, arg_data.style, temp)
+		else
+			temp = dt.preferences.read(mod, 'active_'..argument, arg_data.style)
+			dt.preferences.write(mod, preset..argument, arg_data.style, temp)
+		end
+	end
+	dt.print('saved to '..preset)
+end
+
+local function LoadFromPreference(preset) --load values from the specified "preset" into the GUI elements
+	for argument, arg_data in pairs(ENF.args) do
+	local temp
+		if argument == 'contrast_window_size' or argument == 'contrast_edge_scale' or argument == 'contrast_min_curvature' then	 --comboboxes must be handled specially via an index value
+			temp = dt.preferences.read(mod, preset..argument..'_ind', 'integer')
+			GUI.ENF[argument].selected = temp
+			dt.preferences.write(mod, 'active_'..argument..'_ind', 'integer', temp)
+		else
+			temp = dt.preferences.read(mod, preset..argument, arg_data.style)
+			GUI.ENF[argument].value = temp
+			dt.preferences.write(mod, 'active_'..argument, arg_data.style, temp)
+		end		
+	end
+	dt.print('loaded from '..preset)
+end
+
+local function remove_temp_files(images_to_remove) --deletes all files specified by the input string
+	if dt.configuration.running_os == "windows" then
+		dt.control.execute("del "..images_to_remove)
+	else
+		dt.control.execute("rm "..images_to_remove)
+	end
+end
+
+local function initial(storage, format, images, high_quality, extra_data) --called before export happens, ensure enough images selected and all necesary programs installed correctly, if error then it sets a bit in extra_data for use by main and cancels export
+	if #images <2 then
+		table.insert(extra_data, 1, 1)
+		return {}
+	else
+		PreCall({ENF,AIS,EXF})
+		if AIS.install_error or ENF.install_error or EXF.install_error then
+			table.insert(extra_data, 1, 2)
+			return {}
+		else
+			table.insert(extra_data, 1, 0)
+			return images
+		end
+	end
+end
+
+local function support_format(storage, format) --tells dt we only support TIFF export type
+	local ret = false
+	local temp = string.find(format.name, 'TIFF')
+	if temp ~= nil then ret = true end
+	return ret
+end
+
+local function show_status(storage, image, format, filename, number, total, high_quality, extra_data) --outputs message to user showing script export status
+	dt.print('export for image fusion '..tostring(math.floor(number)).." / "..tostring(math.floor(total)))
+end
+
+local function main(storage, image_table, extra_data)
+	if extra_data[1] == 1 then
+		dt.print('too few images selected, please select at least 2 images')
+		return
+	elseif extra_data[1] == 2 then
+		dt.print('installation error, please verify binary paths are proper')
+		return
+	end
+	local images_to_remove = ''
+	local final_image = nil
+	local source_raw = nil
+	for raw,exported in pairs(image_table) do --add the exported files to list of images to remove when complete\fail
+		images_to_remove = images_to_remove..df.sanitize_filename(exported)..' '
+	end
+	if GUI.align.value then --if user selected to align images then update AIS arguments and execute AIS command
+		local job = dt.gui.create_job('aligning images')
+		image_table, images_to_remove, AIS.images_string = UpdateAISargs(image_table, images_to_remove)
+		local run_cmd = BuildExecuteCmd(AIS)
+		local resp = dsys.external_command(run_cmd)
 		job.valid = false
-		return
-	end
-	dt.print(_('aligning complete'))
-	job.percent = job.percent + percent_step
-	
---Blend Images--
-	from_preset = false
-	iterations = 1
-	pref_text = ""
-	if (enf_chkbtn_image_variations.value) then
-		iterations = 3
-		from_preset = true
-		if string.match(enf_cmbx_fusion_type.value, "DRI") then 
-			pref_text = "dri"
-		elseif string.match(enf_cmbx_fusion_type.value, "DFF") then 
-			pref_text = "dff" 
-		else --if "variants" selected, but not using DRI or DFF preset then cannot create variants
-			dt.print("Error, must select a DRI or DFF preset when starting a fustion with variants")
-			dt.print_error("DRI or DFF preset not selected when variants option was checked")
-			remove_temp_files()
-			job.valid = false
+		if resp ~= 0 then
+			remove_temp_files(images_to_remove)
+			dt.print_error(AIS.name..' failed')
+			dt.print(AIS.name..' failed')
 			return
 		end
 	end
-
-	for j = 1, iterations do
-		if (from_preset) then
-			preset_text=pref_text..j
+	variants = {'active_'} --default to 'active' settings unless user selected to create multiple image variants from the specified preset types
+	if GUI.Presets.variants.value then
+		if GUI.Presets.variants_type.value == 'dri' then
+			variants = {'dri_1', 'dri_2', 'dri_3'}
 		else
-			preset_text=""
+			variants = {'dff_2', 'dff_2', 'dff_3'}
 		end
-		resultBlend, blended_image = blend_images() --Check here to ensure enfuse worked properly
-		if resultBlend ~= 0 then
-			dt.print(_('ERROR: enfuse didn\'t work. For more information see terminal output'))
-			dt.print_error("Enfuse failed")
-			remove_temp_files()
-			job.valid = false
+	end
+	local image_num = 0
+	local job = dt.gui.create_job('blending '..#variants..' image(s)', true) --create a GUI job bar to display enfuse progress
+	UpdateActivePreference() --load current GUI values into active preference (only applies to elements without a clicked/changed callback)
+	for _,prefix in pairs(variants) do --for each image to be created load in the preference values, build arguments string, output image, and run command then execute.
+		job.percent = image_num /(#variants)
+		image_num = image_num+1
+		ENF.images_string, final_image, source_raw = UpdateENFargs(image_table, prefix)
+		local run_cmd = BuildExecuteCmd(ENF)
+		local resp = dsys.external_command(run_cmd)
+		if resp ~= 0 then
+			remove_temp_files(images_to_remove)
+			dt.print_error(ENF.name..' failed')
+			dt.print(ENF.name..' failed')
 			return
 		end
-	--Copy EXIF Data (IF)--
-		if (dt.preferences.read("module_enfuseAdvanced", "exiftool_copy_tags", "bool")) then copy_exif(exif_source_file, path_with_filename) end
-	--Auto-Import--
-		if (dt.preferences.read("module_enfuseAdvanced", "add_image_to_db", "bool")) then 
-			local imported = dt.database.import(path_with_filename)
-		--Apply Selected Style (IF)--
-			if enf_cmbx_style.selected > 1 then
-				set_style = styles[enf_cmbx_style.selected - 1]
+		
+		--copy exif data from original file
+		run_cmd = EXF.bin.." -TagsFromFile "..df.sanitize_filename(source_raw.path..os_path_seperator..source_raw.filename).." -exif:all --subifd:all -overwrite_original "..df.sanitize_filename(final_image)
+		resp = dsys.external_command(run_cmd)
+		
+		
+		if GUI.Target.auto_import.value then --import image into dt if specified
+			local imported = dt.database.import(final_image)
+			if GUI.Target.apply_style.selected > 1 then --apply specified style to imported image
+				local set_style = styles[GUI.Target.apply_style.selected - 1]
 				dt.styles.apply(set_style , imported)
 			end
-		--Copy Tags (IF)--
-			if (enf_chkbtn_cpytags.value) then
-				all_tags = dt.tags.get_tags(dt_source_image)
+			if GUI.Target.copy_tags.value then --copy tags from source image
+				local all_tags = dt.tags.get_tags(source_raw) 
 				for _,tag in pairs(all_tags) do
-					if string.match(tag.name, 'darktable|') == nil then
-						dt.tags.attach(tag, imported)
-					end
+					if string.match(tag.name, 'darktable|') == nil then dt.tags.attach(tag, imported) end
 				end
 			end
-		--Apply Entered Tags (IF)--
-			set_tag = enf_entry_tag.text
-			if set_tag ~= nil then
+			local set_tag = GUI.Target.add_tags.text
+			if set_tag ~= nil then --add additional user-specified tags
 				for tag in string.gmatch(set_tag, '[^,]+') do
-					tag = string.gsub(tag, " ", "")
+					tag = CleanSpaces(tag)
 					tag = dt.tags.create(tag)
 					dt.tags.attach(tag, imported) 
 				end
 			end
 		end
-		job.percent = job.percent + percent_step
 	end
-	
-	--Copy EXIF Data (IF)--
-	
-	remove_temp_files()
-	dt.print("Image fusion process complete")
-	dt.print_log("enfuseAdvanced - Image fusion process complete")
+	remove_temp_files(images_to_remove)
 	job.valid = false
+	dt.print('image fusion process complete')
 end
-local function support_format(enf_storage, format) --Supported: Check to make sure image type is supported by darktable
-  if string.match(string.lower(format.name),"tiff") == nil then
-    return false
-  else
-    return true
-  end   
-end  
 
--- REGISTER --
+--GUI--
+stack_compression = dt.new_widget('stack'){}
+local label_AIS_options= dt.new_widget('section_label'){
+	label = 'image align options'
+}
+GUI.align = dt.new_widget('check_button'){
+	label = 'align images',
+	value = dt.preferences.read(mod, 'active_align', 'bool'),
+	tooltip = 'automatically align images prior to enfuse',
+	clicked_callback = function(self) 
+		dt.preferences.write(mod, 'active_align', 'bool', self.value) 
+		for _,widget in pairs(GUI.AIS) do
+			widget.sensitive = self.value
+		end
+	end,
+	reset_callback = function(self) self.value = true end
+}
+GUI.AIS.radial_distortion = dt.new_widget('check_button'){
+	label = 'optimize radial distortion',
+	value = dt.preferences.read(mod, 'active_radial_distortion', 'bool'),
+	tooltip = 'optimize radial distortion for all images, \nexcept for first',
+	clicked_callback = function(self) dt.preferences.write(mod, 'active_radial_distortion', 'bool', self.value) end,
+	reset_callback = function(self) self.value = true end
+}
+GUI.AIS.optimize_field = dt.new_widget('check_button'){
+	label = 'optimize field of view', 
+	value = dt.preferences.read(mod, 'active_optimize_field', 'bool'),
+	tooltip ='optimize field of view for all images, except for first. \nUseful for aligning focus stacks (DFF) with slightly \ndifferent magnification.',
+	clicked_callback = function(self) dt.preferences.write(mod, 'active_optimize_field', 'bool', self.value) end,
+	reset_callback = function(self) self.value = true end
+}
+GUI.AIS.optimize_image_center = dt.new_widget('check_button'){
+	label = 'optimize image center shift', 
+	value = dt.preferences.read(mod, 'active_optimize_image_center', 'bool'),
+	tooltip ='optimize image center shift for all images, \nexcept for first.',
+	clicked_callback = function(self) dt.preferences.write(mod, 'active_optimize_image_center', 'bool', self.value) end,
+	reset_callback = function(self) self.value = true end
+}
+GUI.AIS.auto_crop = dt.new_widget('check_button'){
+	label = 'auto crop', 
+	value = dt.preferences.read(mod, 'active_auto_crop', 'bool'),
+	tooltip ='auto crop the image to the area covered by all images.',
+	clicked_callback = function(self) dt.preferences.write(mod, 'active_auto_crop', 'bool', self.value) end,
+	reset_callback = function(self) self.value = true end
+}
+GUI.AIS.distortion = dt.new_widget('check_button'){
+	label = 'load distortion from lens database', 
+	value = dt.preferences.read(mod, 'active_distortion', 'bool'),
+	tooltip ='try to load distortion information from lens database',
+	clicked_callback = function(self) dt.preferences.write(mod, 'active_distortion', 'bool', self.value) end,
+	reset_callback = function(self) self.value = true end
+}
+GUI.AIS.gpu = dt.new_widget('check_button'){
+	label = 'use gpu', 
+	value = dt.preferences.read(mod, 'active_gpu', 'bool'),
+	tooltip ='use gpu during alignment',
+	clicked_callback = function(self) dt.preferences.write(mod, 'active_gpu', 'bool', self.value) end,
+	reset_callback = function(self) self.value = true end
+}
+temp = dt.preferences.read(mod, 'active_grid_size_ind', 'integer')
+if not InRange(temp, 1, 9) then temp = 5 end 
+GUI.AIS.grid_size = dt.new_widget('combobox'){
+	label = 'image grid size', 
+	tooltip ='break image into a rectangular grid \nand attempt to find num control points in each section.\ndefault: (5x5)',
+	selected = temp,
+	'1','2','3','4','5','6','7','8','9',
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_grid_size', 'integer', self.value) 
+		dt.preferences.write(mod, 'active_grid_size_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 5
+		dt.preferences.write(mod, 'active_grid_size', 'integer', self.value) 
+		dt.preferences.write(mod, 'active_grid_size_ind', 'integer', self.selected)
+	end
+} 
+temp = dt.preferences.read(mod, 'active_control_points_ind', 'integer')
+if not InRange(temp, 1, 9) then temp = 8 end 
+GUI.AIS.control_points = dt.new_widget('combobox'){
+	label = 'control points/grid', 
+	tooltip ='number of control points (per grid, see option -g) \nto create between adjacent images \ndefault: (8).',
+	selected = temp,
+	'1','2','3','4','5','6','7','8','9',             
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_control_points', 'integer', self.value) 
+		dt.preferences.write(mod, 'active_control_points_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 8
+		dt.preferences.write(mod, 'active_control_points', 'integer', self.value) 
+		dt.preferences.write(mod, 'active_control_points_ind', 'integer', self.selected)
+	end
+} 
+temp = dt.preferences.read(mod, 'active_control_points_remove_ind', 'integer')
+if not InRange(temp, 1, 9) then temp = 3 end 
+GUI.AIS.control_points_remove = dt.new_widget('combobox'){
+	label = 'remove control points with error', 
+	tooltip ='remove all control points with an error higher \nthan num pixels \ndefault: (3)',
+	selected = temp,
+	'1','2','3','4','5','6','7','8','9',             
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_control_points_remove', 'integer', self.value) 
+		dt.preferences.write(mod, 'active_control_points_remove_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 3
+		dt.preferences.write(mod, 'active_control_points_remove', 'integer', self.value) 
+		dt.preferences.write(mod, 'active_control_points_remove_ind', 'integer', self.selected)
+	end
+}
+temp = dt.preferences.read(mod, 'active_correlation_ind', 'integer')
+if not InRange(temp, 1, 10) then temp = 9 end 
+GUI.AIS.correlation  = dt.new_widget('combobox'){
+	label = 'correlation threshold for control points', 
+	tooltip ='correlation threshold for identifying \ncontrol points \ndefault: (0.9).',
+	selected = temp,
+	'0.1','0.2','0.3','0.4','0.5','0.6','0.7','0.8','0.9','1.0',     
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_correlation', 'float', self.value) 
+		dt.preferences.write(mod, 'active_correlation_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 9
+		dt.preferences.write(mod, 'active_correlation', 'float', self.value) 
+		dt.preferences.write(mod, 'active_correlation_ind', 'integer', self.selected)
+	end
+} 
+local label_ENF_options= dt.new_widget('section_label'){
+	label = 'image fusion options'
+}
+temp = dt.preferences.read(mod, 'active_exposure_weight', 'float')
+if not InRange(temp, 0, 1) then temp = 1 end
+GUI.ENF.exposure_weight = dt.new_widget('slider'){
+	label = 'exposure weight',
+	tooltip = 'set the relative weight of the well-exposedness criterion \nas defined by the chosen exposure weight function. \nincreasing this weight relative to the others will\n make well-exposed pixels contribute more to\n the final output. \ndefault: (1.0)',
+	hard_min = 0,
+	hard_max = 1,
+	value = temp,
+	reset_callback = function(self) 
+		self.value = 1
+	end
+}
+temp = dt.preferences.read(mod, 'active_saturation_weight', 'float')
+if not InRange(temp, 0, 1) then temp = .2 end
+GUI.ENF.saturation_weight = dt.new_widget('slider'){
+	label = 'saturation weight',
+	tooltip = 'set the relative weight of high-saturation pixels. \nincreasing this weight makes pixels with high \nsaturation contribute more to the final output. \ndefault: (0.2)',
+	hard_min = 0,
+	hard_max = 1,
+	value = temp,
+	reset_callback = function(self) 
+		self.value = 0.2
+	end
+}
+temp = dt.preferences.read(mod, 'active_contrast_weight', 'float')
+if not InRange(temp, 0, 1) then temp = 0 end
+GUI.ENF.contrast_weight = dt.new_widget('slider'){
+	label = 'contrast weight',
+	tooltip = 'sets the relative weight of high local-contrast pixels. \ndefault: (0.0).',
+	hard_min = 0,
+	hard_max = 1,
+	value = temp,
+	reset_callback = function(self) 
+		self.value = 0
+	end
+}
+temp = dt.preferences.read(mod, 'active_exposure_optimum', 'float')
+if not InRange(temp, 0, 1) then temp = 0.5 end
+GUI.ENF.exposure_optimum = dt.new_widget('slider'){
+	label = 'exposure optimum',
+	tooltip = 'determine at what normalized exposure value\n the optimum exposure of the input images\n is. this is, set the position of the maximum\n of the exposure weight curve. use this \noption to fine-tune exposure weighting. \ndefault: (0.5)',
+	hard_min = 0,
+	hard_max = 1,
+	value = temp,
+	reset_callback = function(self) 
+		self.value = 0.5
+	end
+}
+temp = dt.preferences.read(mod, 'active_exposure_width', 'float')
+if not InRange(temp, 0, 1) then temp = 0.2 end
+GUI.ENF.exposure_width = dt.new_widget('slider'){
+	label = 'exposure width',
+	tooltip = 'set the characteristic width (FWHM) of the exposure \nweight function. low numbers give less weight to \npixels that are far from the user-defined \noptimum and vice versa. use this option to \nfine-tune exposure weighting. \ndefault: (0.2)',
+	hard_min = 0,
+	hard_max = 1,
+	value = temp,
+	reset_callback = function(self) 
+		self.value = 0.2
+	end
+}
+GUI.ENF.hard_masks = dt.new_widget('check_button'){
+	label = 'hard mask', 
+	value = dt.preferences.read(mod, 'active_hard_masks', 'bool'),
+	tooltip ='force hard blend masks on the finest scale. this avoids \naveraging of fine details (only), at the expense \nof increasing the noise. this improves the \nsharpness of focus stacks considerably.\ndefault (soft mask)',   
+	clicked_callback = function(self) dt.preferences.write(mod, 'active_hard_masks', 'bool', self.value) end,
+	reset_callback = function(self) self.value = false end
+}
+GUI.ENF.save_masks = dt.new_widget('check_button'){
+	label = 'save masks', 
+	value = dt.preferences.read(mod, 'active_save_masks', 'bool'),
+	tooltip ='Save the generated weight masks to your home directory,\nenblend saves masks as 8 bit grayscale, \ni.e. single channel images. \nfor accuracy we recommend to choose a lossless format.',  
+	clicked_callback = function(self) dt.preferences.write(mod, 'active_save_masks', 'bool', self.value) end,
+	reset_callback = function(self) self.value = false end
+}
+temp = dt.preferences.read(mod, 'active_contrast_window_size_ind', 'integer')
+if not InRange(temp, 1, 8) then temp = 3 end 
+GUI.ENF.contrast_window_size = dt.new_widget('combobox'){
+	label = 'contrast window size', 
+	tooltip ='set the window size for local contrast analysis. \nthe window will be a square of size × size pixels. \nif given an even size, Enfuse will \nautomatically use the next odd number.\nfor contrast analysis size values larger \nthan 5 pixels might result in a \nblurry composite image. values of 3 and \n5 pixels have given good results on \nfocus stacks. \ndefault: (5) pixels',
+	selected = temp,
+	'3','4','5','6','7','8','9','10',
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_contrast_window_size', 'integer', self.value) 
+		dt.preferences.write(mod, 'active_contrast_window_size_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 3
+		dt.preferences.write(mod, 'active_contrast_window_size', 'integer', self.value) 
+		dt.preferences.write(mod, 'active_contrast_window_size_ind', 'integer', self.selected)
+	end
+} 
+temp = dt.preferences.read(mod, 'active_contrast_edge_scale_ind', 'integer')
+if not InRange(temp, 1, 6) then temp = 1 end 
+GUI.ENF.contrast_edge_scale = dt.new_widget('combobox'){
+	label = 'contrast edge scale', 
+	tooltip ='a non-zero value for EDGE-SCALE switches on the \nLaplacian-of-Gaussian (LoG) edge detection algorithm.\n edage-scale is the radius of the Gaussian used \nin the search for edges. a positive LCE-SCALE \nturns on local contrast enhancement (LCE) \nbefore the LoG edge detection. \nDefault: (0.0) pixels.',
+	selected = temp,
+	'0.0','0.1','0.2','0.3','0.4','0.5',
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_contrast_edge_scale', 'float', self.value) 
+		dt.preferences.write(mod, 'active_contrast_edge_scale_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 1
+		dt.preferences.write(mod, 'active_contrast_edge_scale', 'float', self.value) 
+		dt.preferences.write(mod, 'active_contrast_edge_scale_ind', 'integer', self.selected)
+	end
+}
+temp = dt.preferences.read(mod, 'active_contrast_min_curvature_ind', 'integer')
+if not InRange(temp, 1, 11) then temp = 1 end 
+GUI.ENF.contrast_min_curvature = dt.new_widget('combobox'){
+	label = 'contrast min curvature [%]',
+	tooltip ='define the minimum curvature for the LoG edge detection. Append a ‘%’ to specify the minimum curvature relative to maximum pixel value in the source image. Default: (0.0%)',
+	selected = temp, 
+	'0.0%','0.1%','0.2%','0.3%','0.4%','0.5%','0.6%','0.7%','0.8%','0.9%','1.0%',
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_contrast_min_curvature', 'string', self.value) 
+		dt.preferences.write(mod, 'active_contrast_min_curvature_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 1
+		dt.preferences.write(mod, 'active_contrast_min_curvature', 'string', self.value) 
+		dt.preferences.write(mod, 'active_contrast_min_curvature_ind', 'integer', self.selected)
+	end
+} 
+local label_target_options= dt.new_widget('section_label'){
+	label = 'target file'
+}
+temp = dt.preferences.read(mod, 'active_compression_level_tif_ind', 'integer')
+if not InRange(temp, 1, 4) then temp = 1 end 
+GUI.Target.compression_level_tif = dt.new_widget('combobox'){
+	label = 'tiff compression', 
+	tooltip = 'compression method for tiff files',
+	selected = temp,
+	'none','deflate','lzw','packbits',
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_compression_level_tif', 'string', self.value) 
+		dt.preferences.write(mod, 'active_compression_level_tif_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 1
+		dt.preferences.write(mod, 'active_compression_level_tif', 'string', self.value) 
+		dt.preferences.write(mod, 'active_compression_level_tif_ind', 'integer', self.selected)
+	end	
+}
+temp = dt.preferences.read(mod, 'active_compression_level_jpg', 'integer')
+if not InRange(temp, 0, 100) then temp = 0 end
+GUI.Target.compression_level_jpg = dt.new_widget('slider'){
+	label = 'jpeg compression',
+	tooltip = 'jpeg compression level',
+	soft_min = 0,
+	soft_max = 100,
+	hard_min = 0,
+	hard_max = 100,
+	step = 5,
+	digits = 0,
+	value = temp,
+	reset_callback = function(self) 
+		self.value = 0
+	end
+}
+local blank = dt.new_widget('box'){}
+stack_compression = dt.new_widget('stack'){
+	GUI.Target.compression_level_tif,
+	GUI.Target.compression_level_jpg,
+	blank,
+	active = 1
+}
+temp = dt.preferences.read(mod, 'active_format_ind', 'integer')
+if not InRange(temp, 1, 6) then temp = 1 end 
+GUI.Target.format = dt.new_widget('combobox'){
+	label = 'file format', 
+	tooltip = 'file format of the enfused final image',
+	selected = temp,
+	'tif','jpg','png','pnm','pbm','ppm',
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_format', 'string', self.value) 
+		dt.preferences.write(mod, 'active_format_ind', 'integer', self.selected)
+		if self.value == 'tif' then stack_compression.active = 1
+		elseif self.value == 'jpg' then stack_compression.active = 2
+		else stack_compression.active = 3
+		end
+	end,
+	reset_callback = function(self) 
+		self.selected = 1
+		dt.preferences.write(mod, 'active_format', 'string', self.value) 
+		dt.preferences.write(mod, 'active_format_ind', 'integer', self.selected)
+	end	
+}
+temp = dt.preferences.read(mod, 'active_depth_ind', 'integer')
+if not InRange(temp, 1, 5) then temp = 3 end 
+GUI.Target.depth = dt.new_widget('combobox'){
+	label = 'bit depth', 
+	tooltip = 'bit depth of the enfused file',
+	selected = temp,
+	'8','16','32','r32','r64',
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_depth', 'string', self.value) 
+		dt.preferences.write(mod, 'active_depth_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 2
+		dt.preferences.write(mod, 'active_depth', 'string', self.value) 
+		dt.preferences.write(mod, 'active_depth_ind', 'integer', self.selected)
+	end	
+}
+local label_directory = dt.new_widget("label"){
+	label = 'directory',
+	ellipsize = "start",
+	halign = "start"
+}
+temp = dt.preferences.read(mod, 'active_output_directory', 'string')
+if temp == '' or temp == nil then temp = dt.collection[1].path end
+GUI.Target.output_directory = dt.new_widget("file_chooser_button"){
+	title = 'Select export path', 
+	is_directory = true,
+	tooltip ='select the target directory for the fused image. \nthe filename is created automatically.',
+	value = temp,
+	changed_callback = function(self) dt.preferences.write(mod, 'active_output_directory', 'string', self.value) end
+}
+GUI.Target.source_location = dt.new_widget('check_button'){
+	label = 'save to source image location', 
+	value = dt.preferences.read(mod, 'active_source_location', 'bool'),
+	tooltip ='If checked ignores the location above and saves output image(s) to the same location as the source images.',  
+	clicked_callback = function(self) dt.preferences.write(mod, 'active_source_location', 'bool', self.value) end,
+	reset_callback = function(self) self.value = true end
+}
+temp = dt.preferences.read(mod, 'active_on_conflict_ind', 'integer')
+if not InRange(temp, 1, 2) then temp = 1 end 
+GUI.Target.on_conflict = dt.new_widget('combobox'){
+	label = 'on conflict', 
+	selected = temp,  
+	'create unique filename','overwrite',           
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_on_conflict', 'string', self.value) 
+		dt.preferences.write(mod, 'active_on_conflict_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 1
+		dt.preferences.write(mod, 'active_on_conflict', 'string', self.value) 
+		dt.preferences.write(mod, 'active_on_conflict_ind', 'integer', self.selected)
+	end	
+}  
+GUI.Target.auto_import = dt.new_widget('check_button'){
+	label = 'auto import', 
+	value = dt.preferences.read(mod, 'active_auto_import', 'bool'),
+	tooltip ='import the image into darktable database when enfuse completes',	
+	clicked_callback = function(self)
+		dt.preferences.write(mod, 'active_auto_import', 'bool', self.value)
+		GUI.Target.apply_style.sensitive = self.value
+		GUI.Target.copy_tags.sensitive = self.value
+		GUI.Target.add_tags.sensitive = self.value
+	end,
+	reset_callback = function(self) self.value = true end
+}
+temp = dt.preferences.read(mod, 'active_apply_style_ind', 'integer')
+GUI.Target.apply_style = dt.new_widget('combobox'){
+	label = "Apply Style on Import",
+	tooltip = "Apply selected style on auto-import to newly created blended image",
+	selected = 1,
+	"none",
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_apply_style', 'string', self.value) 
+		dt.preferences.write(mod, 'active_apply_style_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 1
+		dt.preferences.write(mod, 'active_apply_style', 'string', self.value) 
+		dt.preferences.write(mod, 'active_apply_style_ind', 'integer', self.selected)
+	end	
+}
+for k=1, (styles_count-1) do
+	GUI.Target.apply_style[k+1] = styles[k].name
+end
+if not InRange(temp, 1, styles_count) then temp = 1 end
+GUI.Target.apply_style.selected = temp
+GUI.Target.copy_tags = dt.new_widget('check_button'){
+	label = 'copy tags', 
+	value = dt.preferences.read(mod, 'active_copy_tags', 'bool'),
+	tooltip ='Copy tags from first image.',	
+	clicked_callback = function(self) dt.preferences.write(mod, 'active_copy_tags', 'bool', self.value) end,
+	reset_callback = function(self) self.value = true end
+}
+temp = dt.preferences.read(mod, 'active_add_tags', 'string')
+if temp == '' then temp = nil end 
+GUI.Target.add_tags = dt.new_widget("entry"){
+	tooltip = "Additional tags to be added on import. Seperate with commas, all spaces will be removed",
+	text = temp,
+	placeholder = "Enter tags, seperated by commas",
+	editable = true
+}
+temp = dt.preferences.read(mod, 'active_current_preset_ind', 'integer')
+if not InRange(temp, 1, 6) then temp = 1 end
+GUI.Presets.current_preset = dt.new_widget('combobox'){
+	label = "active preset",
+	tooltip = "preset to be loaded from or saved to",
+	value = temp,
+	'dri_1', 'dri_2', 'dri_3', 'dff_1', 'dff_2', 'dff_3',
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_current_preset', 'string', self.value) 
+		dt.preferences.write(mod, 'active_current_preset_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 1
+		dt.preferences.write(mod, 'active_current_preset', 'string', self.value) 
+		dt.preferences.write(mod, 'active_current_preset_ind', 'integer', self.selected)
+	end	
+}
+GUI.Presets.load = dt.new_widget("button"){
+	label = 'laod fusion preset',
+	tooltip ='load current fusion parameters from selected preset',
+	clicked_callback = function() LoadFromPreference(GUI.Presets.current_preset.value) end
+}
+GUI.Presets.save = dt.new_widget("button"){
+	label = 'save to fusion preset',
+	tooltip ='save current fusion parameters to selected preset',
+	clicked_callback = function() SaveToPreference(GUI.Presets.current_preset.value) end
+}
+GUI.Presets.variants = dt.new_widget('check_button'){
+	label = 'create image variants from presets', 
+	value = dt.preferences.read(mod, 'active_variants', 'bool'),
+	tooltip ='create multiple image variants based on the three different presets of the specified type',	
+	clicked_callback = function(self) 
+		dt.preferences.write(mod, 'active_variants', 'bool', self.value)
+		if self.value then
+			GUI.Target.on_conflict.selected = 1
+			GUI.Target.on_conflict.sensitive = false
+			GUI.Presets.variants_type.sensitive = true
+		else
+			GUI.Target.on_conflict.sensitive = true
+			GUI.Presets.variants_type.sensitive = false
+		end
+	end,
+	reset_callback = function(self) self.value = false end
+}
+temp = dt.preferences.read(mod, 'active_variants_type_ind', 'integer')
+if not InRange(temp, 1, 2) then temp = 1 end
+GUI.Presets.variants_type = dt.new_widget('combobox'){
+	label = "create variants type",
+	tooltip = "preset type to be used when creating image variants",
+	selected = temp,
+	'dri', 'dff',
+	changed_callback = function(self)
+		dt.preferences.write(mod, 'active_variants_type', 'string', self.value) 
+		dt.preferences.write(mod, 'active_variants_type_ind', 'integer', self.selected)
+	end,
+	reset_callback = function(self) 
+		self.selected = 1
+		dt.preferences.write(mod, 'active_variants_type', 'string', self.value) 
+		dt.preferences.write(mod, 'active_variants_type_ind', 'integer', self.selected)
+	end	
+}
+GUI.Presets.variants_type.sensitive = GUI.Presets.variants.value
+temp = GUI.Target.format.value
+if temp == 'tif' then temp = 1
+elseif temp == 'jpg' then temp = 2
+else temp = 3
+end
+stack_compression.active = temp
+for _,widget in pairs(GUI.AIS) do
+	widget.sensitive = GUI.align.value
+end
+GUI.Target.apply_style.sensitive = GUI.Target.auto_import.value
+GUI.Target.copy_tags.sensitive = GUI.Target.auto_import.value
+GUI.Target.add_tags.sensitive = GUI.Target.auto_import.value
+
+local box_AIS = dt.new_widget('box'){
+	orientation = 'vertical',
+    label_AIS_options,
+	GUI.align,
+	GUI.AIS.radial_distortion,
+	GUI.AIS.optimize_field,
+	GUI.AIS.optimize_image_center,
+	GUI.AIS.auto_crop,
+	GUI.AIS.distortion,
+	GUI.AIS.gpu,
+	GUI.AIS.grid_size,
+	GUI.AIS.control_points,
+	GUI.AIS.control_points_remove,
+	GUI.AIS.correlation
+}
+local box_ENF = dt.new_widget('box'){
+	orientation = 'vertical',
+	label_ENF_options,
+	GUI.ENF.exposure_weight,
+	GUI.ENF.saturation_weight,
+	GUI.ENF.contrast_weight,
+	GUI.ENF.exposure_optimum,
+	GUI.ENF.exposure_width,
+	GUI.ENF.hard_masks,
+	GUI.ENF.save_masks,
+	GUI.ENF.contrast_window_size,
+	GUI.ENF.contrast_edge_scale,
+	GUI.ENF.contrast_min_curvature,
+	GUI.Presets.current_preset,
+	GUI.Presets.load,
+	GUI.Presets.save
+}
+local box_Target = dt.new_widget('box'){
+	orientation = 'vertical',
+	label_target_options,
+	GUI.Target.format,
+	GUI.Target.depth,
+	stack_compression,
+	label_directory,
+	GUI.Target.output_directory,
+	GUI.Target.source_location,
+	GUI.Target.on_conflict,
+	GUI.Presets.variants,
+	GUI.Presets.variants_type,
+	GUI.Target.auto_import,
+	GUI.Target.apply_style,
+	GUI.Target.copy_tags,
+	GUI.Target.add_tags
+}
+GUI.options_contain = dt.new_widget('stack'){
+	active = 2,
+	box_AIS,
+	box_ENF,
+	box_Target
+}
+GUI.show_options = dt.new_widget('combobox'){
+	label = "show options",
+	tooltip = "show options for specified aspect of output",
+	selected = 1,
+	'align image stack', 'enfuse/enblend', 'target file',
+	changed_callback = function(self)
+		GUI.options_contain.active = self.selected
+	end,
+	reset_callback = function(self) 
+		self.selected = 1
+		dt.preferences.write(mod, 'active_current_preset', 'string', self.value) 
+		dt.preferences.write(mod, 'active_current_preset_ind', 'integer', self.selected)
+	end	
+}
+
+local storage_widget = dt.new_widget("box") {
+    orientation = "vertical",
+	GUI.show_options,
+	GUI.options_contain
+}
+	
+
+-- Register new storage --
 dt.register_storage(
 	"module_enfuseAdvanced", --Module name
 	'DRI or DFF image', --Name
 	show_status, --store: called once per exported image
-	create_image_fusion, --finalize: called once when all images have finished exporting
+	main, --finalize: called once when all images have finished exporting
 	support_format, --supported
-	nil, --initialize
-	enf_widget
+	initial, --initialize
+	storage_widget
 	)
-
--- PREFERENCES --                
-entry_widget_style = dt.new_widget("entry"){
-	tooltip = "Enter the style name exactly as it is",
-	text = nil,
-	placeholder = "Enter Style name",
-	editable = true
-}
-dt.preferences.register("module_enfuseAdvanced", "style",	-- name
-	"string",	-- type
-	'enfuseAdvanced: Defualt Style',	-- label
-	'Changes DEFAULT entry in the Style option. Requires restart to take effect.',	-- tooltip
-	"",	-- default
-	entry_widget_style
-)
-entry_widget_tags = dt.new_widget("entry"){
-	tooltip = "Seperate with commas, all spaces will be removed",
-	text = nil,
-	placeholder = "Enter default tags",
-	editable = true
-}
-dt.preferences.register("module_enfuseAdvanced", "add_tags",	-- name
-	"string",	-- type
-	'enfuseAdvanced: Defualt additional tags',	-- label
-	'Changes DEFAULT entry in the additional tags option. Requires restart to take effect.',	-- tooltip
-	"",	-- default
-	entry_widget_tags
-) 
-dt.preferences.register("module_enfuseAdvanced", "copy_tags",	-- name
-	"bool",	-- type
-	'enfuseAdvanced: Copy tags from first image by default',	-- label
-	'Changes DEFAULT selection for Copy Tags, Requires restart to take effect.',	-- tooltip
-	true	-- default
-)
-dt.preferences.register("module_enfuseAdvanced", "exiftool_copy_tags",                -- name
-	"bool",                                                   -- type
-	_('enfuseAdvanced: copy exif data'),                             -- label
-	_('copy the exif tags from the first image to the target'),  -- tooltip
-	true)                                                     -- default                       
-dt.preferences.register("module_enfuseAdvanced", "add_image_to_db",                   -- name
-	"bool",                                                   -- type
-	_('enfuseAdvanced: add fused image to database'),                -- label
-	_('add the fused image to the darktable database'),          -- tooltip
-	false)                                                    -- default                              
-dt.preferences.register("module_enfuseAdvanced", "align_use_gpu",                     -- name
-	"bool",                                                   -- type
-	_('enfuseAdvanced: use GPU for remaping'),                       -- label
-	_('set the GPU remapping for image align'),                  -- tooltip
-	false) 
-dt.preferences.register("module_enfuseAdvanced", "compression_jpeg",   -- name
-	"integer",                                 -- type
-	_('enfuseAdvanced: JPEG compression'),            -- label
-	_('set the compression for JPEG files'),      -- tooltip
-	98,                                        -- default
-	50,                                        -- min
-	100)                                       -- max                     
-dt.preferences.register("module_enfuseAdvanced", "compression_tiff",   -- name
-	"enum",                                    -- type
-	_('enfuseAdvanced: TIFF compression'),            -- label
-	_('set the compression type for tiff files'), -- tooltip
-	"LZW",                                     -- default
-	"NONE", "DEFLATE","PACKBITS")        -- va                 
-dt.preferences.register("module_enfuseAdvanced", "image_color_depth",  -- name
-	"enum",                                    -- type
-	_('enfuseAdvanced: image color depth (bit)'),     -- label
-	_('set the output color depth'),              -- tooltip
-	"16",                                      -- default
-	"8","32","r32","r64")                -- values
-
---AIS bin location
-if not AIS_path then 
-	AIS_path = ""
-end
-local AIS_path_widget = dt.new_widget("file_chooser_button"){
-	title = "Select align_image_stack[.exe] file",
-	value = AIS_path,
-	is_directory = false,
-}
-dt.preferences.register("executable_paths", "align_image_stack",	-- name
-	"file",	-- type
-	'enfuseAdvanced: Align Image Stack Location',	-- label
-	'Install location of align_image_stack. Requires restart to take effect.',	-- tooltip
-	"align_image_stack",	-- default
-	AIS_path_widget
-)
-
---enfuse bin location
-if not enfuse_path then 
-	enfuse_path = ""
-end
-local enfuse_path_widget = dt.new_widget("file_chooser_button"){
-	title = "Select enfuse[.exe] file",
-	value = enfuse_path,
-	is_directory = false,
-}
-dt.preferences.register("executable_paths", "enfuse",	-- name
-	"file",	-- type
-	'enfuseAdvanced: enfuse Location',	-- label
-	'Install location of enfuse. Requires restart to take effect.',	-- tooltip
-	"enfuse",	-- default
-	enfuse_path_widget
-)
-
---exiftool bin location
-if not exiftool_path then 
-	exiftool_path = ""
-end
-local exiftool_path_widget = dt.new_widget("file_chooser_button"){
-	title = "Select exiftool[.exe] file",
-	value = exiftool_path,
-	is_directory = false,
-}
-dt.preferences.register("executable_paths", "exiftool",	-- name
-	"file",	-- type
-	'enfuseAdvanced: exiftool Location',	-- label
-	'Install location of exiftool. Requires restart to take effect.',	-- tooltip
-	"exiftool",	-- default
-	exiftool_path_widget
-)
-                       

From 58ca70c511c0cea5e3c8bbcd38f3db6dd7e8baca Mon Sep 17 00:00:00 2001
From: BzKevin <36381472+BzKevin@users.noreply.github.com>
Date: Tue, 5 Mar 2019 09:11:28 -0500
Subject: [PATCH 2/6] Tab to Space


From f740d34f1fb3be2e918062441073c626d9015ca0 Mon Sep 17 00:00:00 2001
From: BzKevin <36381472+BzKevin@users.noreply.github.com>
Date: Tue, 5 Mar 2019 09:12:54 -0500
Subject: [PATCH 3/6] Tab to Space

---
 contrib/enfuseAdvanced.lua | 1516 ++++++++++++++++++------------------
 1 file changed, 758 insertions(+), 758 deletions(-)

diff --git a/contrib/enfuseAdvanced.lua b/contrib/enfuseAdvanced.lua
index 6d5b3e8..0f68df9 100644
--- a/contrib/enfuseAdvanced.lua
+++ b/contrib/enfuseAdvanced.lua
@@ -65,897 +65,897 @@ local os_path_seperator = '/'
 if dt.configuration.running_os == 'windows' then os_path_seperator = '\\' end
 
 du.check_min_api_version("5.0.0", "enfuseAdvanced") 
-dt.preferences.register("executable_paths", "align_image_stack",	-- name
-	"file",	-- type
-	'enfuseAdvanced: Align Image Stack Location',	-- label
-	'Install location of align_image_stack. Requires restart to take effect.',	-- tooltip
-	"align_image_stack"	-- default
+dt.preferences.register("executable_paths", "align_image_stack",    -- name
+    "file", -- type
+    'enfuseAdvanced: Align Image Stack Location',   -- label
+    'Install location of align_image_stack. Requires restart to take effect.',  -- tooltip
+    "align_image_stack" -- default
 )
-dt.preferences.register("executable_paths", "enfuse",	-- name
-	"file",	-- type
-	'enfuseAdvanced: enfuse Location',	-- label
-	'Install location of enfuse. Requires restart to take effect.',	-- tooltip
-	'enfuse'
+dt.preferences.register("executable_paths", "enfuse",   -- name
+    "file", -- type
+    'enfuseAdvanced: enfuse Location',  -- label
+    'Install location of enfuse. Requires restart to take effect.', -- tooltip
+    'enfuse'
 )
-dt.preferences.register("executable_paths", "exiftool",	-- name
-	"file",	-- type
-	'enfuseAdvanced: exiftool Location',	-- label
-	'Install location of exiftool. Requires restart to take effect.',	-- tooltip
-	"exiftool"	-- default
+dt.preferences.register("executable_paths", "exiftool", -- name
+    "file", -- type
+    'enfuseAdvanced: exiftool Location',    -- label
+    'Install location of exiftool. Requires restart to take effect.',   -- tooltip
+    "exiftool"  -- default
 )
 
 -- INITS --
 local AIS = {
-	name = 'align_image_stack',
-	bin = '',
-	first_run = true,
-	install_error = false,
-	arg_string = '',
-	images_string = '',
-	args = {
-		radial_distortion 		= {text = '-d', 			style = 'bool'},
-		optimize_field 			= {text = '-m', 			style = 'bool'},
-		optimize_image_center 	= {text = '-i', 			style = 'bool'},
-		auto_crop				= {text = '-C', 			style = 'bool'},
-		distortion				= {text = '--distortion', 	style = 'bool'},
-		gpu						= {text = '--gpu',			style = 'bool'},
-		grid_size				= {text = '-g ', 			style = 'integer'},
-		control_points			= {text = '-c ', 			style = 'integer'},
-		control_points_remove 	= {text = '-t ', 			style = 'integer'},
-		correlation				= {text = '--corr=', 		style = 'float'}
-	}
+    name = 'align_image_stack',
+    bin = '',
+    first_run = true,
+    install_error = false,
+    arg_string = '',
+    images_string = '',
+    args = {
+        radial_distortion       = {text = '-d',             style = 'bool'},
+        optimize_field          = {text = '-m',             style = 'bool'},
+        optimize_image_center   = {text = '-i',             style = 'bool'},
+        auto_crop               = {text = '-C',             style = 'bool'},
+        distortion              = {text = '--distortion',   style = 'bool'},
+        gpu                     = {text = '--gpu',          style = 'bool'},
+        grid_size               = {text = '-g ',            style = 'integer'},
+        control_points          = {text = '-c ',            style = 'integer'},
+        control_points_remove   = {text = '-t ',            style = 'integer'},
+        correlation             = {text = '--corr=',        style = 'float'}
+    }
 }
 local ENF = {
-	name = 'enfuse',
-	bin = '',
-	first_run = true,
-	install_error = false,
-	arg_string = '',
-	image_string = '',
-	args = {
-		exposure_weight 		= {text = '--exposure-weight=', 		style = 'float'},
-		saturation_weight		= {text = '--saturation-weight=', 		style = 'float'},
-		contrast_weight		 	= {text = '--contrast-weight=', 		style = 'float'},
-		exposure_optimum		= {text = '--exposure-optimum=', 		style = 'float'},
-		exposure_width			= {text = '--exposure-width=', 			style = 'float'},
-		hard_masks				= {text = '--hard-mask', 				style = 'bool'},
-		save_masks				= {text = '--save-masks', 				style = 'bool'},
-		contrast_window_size 	= {text = '--contrast-window-size=', 	style = 'integer'},
-		contrast_edge_scale		= {text = '--contrast-edge-scale=', 	style = 'float'},
-		contrast_min_curvature	= {text = '--contrast-min-curvature=', style = 'string'}
-	}
+    name = 'enfuse',
+    bin = '',
+    first_run = true,
+    install_error = false,
+    arg_string = '',
+    image_string = '',
+    args = {
+        exposure_weight         = {text = '--exposure-weight=',         style = 'float'},
+        saturation_weight       = {text = '--saturation-weight=',       style = 'float'},
+        contrast_weight         = {text = '--contrast-weight=',         style = 'float'},
+        exposure_optimum        = {text = '--exposure-optimum=',        style = 'float'},
+        exposure_width          = {text = '--exposure-width=',          style = 'float'},
+        hard_masks              = {text = '--hard-mask',                style = 'bool'},
+        save_masks              = {text = '--save-masks',               style = 'bool'},
+        contrast_window_size    = {text = '--contrast-window-size=',    style = 'integer'},
+        contrast_edge_scale     = {text = '--contrast-edge-scale=',     style = 'float'},
+        contrast_min_curvature  = {text = '--contrast-min-curvature=', style = 'string'}
+    }
 }
 local EXF = {
-	name = 'exiftool',
-	bin = '',
-	first_run = true,
-	install_error = false
+    name = 'exiftool',
+    bin = '',
+    first_run = true,
+    install_error = false
 }
 local GUI = {
-	AIS = {
-		radial_distortion 		= {},
-		optimize_field 			= {},
-		optimize_image_center 	= {},
-		auto_crop				= {},
-		distortion				= {},
-		grid_size				= {},
-		control_points			= {},
-		control_points_remove 	= {},
-		correlation				= {}},
-	ENF = {
-		exposure_weight 		= {},
-		saturation_weight		= {},
-		contrast_weight		 	= {},
-		exposure_optimum		= {},
-		exposure_width			= {},
-		hard_masks				= {},
-		save_masks				= {},
-		contrast_window_size 	= {},
-		contrast_edge_scale		= {},
-		contrast_min_curvature	= {}},
-	Target = {
-		format					= {},
-		depth					= {},  	
-		compression_level_tif	= {},
-		compression_level_jpg	= {},
-		output_compress			= {},
-		output_directory		= {},
-		source_location			= {},
-		on_conflict				= {},
-		auto_import				= {},
-		apply_style				= {},
-		copy_tags				= {},
-		add_tags				= {}},
-	Presets = {
-		current_preset		={};
-		load				={};
-		save				={};
-		variants			={};
-		variants_type		={}},
-	align					= {},
-	options_contain			= {},
-	show_options			= {}
+    AIS = {
+        radial_distortion       = {},
+        optimize_field          = {},
+        optimize_image_center   = {},
+        auto_crop               = {},
+        distortion              = {},
+        grid_size               = {},
+        control_points          = {},
+        control_points_remove   = {},
+        correlation             = {}},
+    ENF = {
+        exposure_weight         = {},
+        saturation_weight       = {},
+        contrast_weight         = {},
+        exposure_optimum        = {},
+        exposure_width          = {},
+        hard_masks              = {},
+        save_masks              = {},
+        contrast_window_size    = {},
+        contrast_edge_scale     = {},
+        contrast_min_curvature  = {}},
+    Target = {
+        format                  = {},
+        depth                   = {},   
+        compression_level_tif   = {},
+        compression_level_jpg   = {},
+        output_compress         = {},
+        output_directory        = {},
+        source_location         = {},
+        on_conflict             = {},
+        auto_import             = {},
+        apply_style             = {},
+        copy_tags               = {},
+        add_tags                = {}},
+    Presets = {
+        current_preset      ={};
+        load                ={};
+        save                ={};
+        variants            ={};
+        variants_type       ={}},
+    align                   = {},
+    options_contain         = {},
+    show_options            = {}
 }
 
 local styles = dt.styles
 local styles_count = 1 -- "none" = 1
 for _,i in pairs(dt.styles) do
-	if type(i) == "userdata" then styles_count = styles_count + 1 end
+    if type(i) == "userdata" then styles_count = styles_count + 1 end
 end
 
 -- FUNCTION --
 local function InRange(test, low, high) -- tests if test value is within range of low and high (inclusive)
-	if test >= low and test <= high then
-		return true
-	else
-		return false
-	end
+    if test >= low and test <= high then
+        return true
+    else
+        return false
+    end
 end
 
 local function GetFileName(full_path) -- Parses a full path (path/filename_identifier.extension) into individual parts
 --[[Input: Folder1/Folder2/Folder3/Img_0001.CR2
-	
-	Returns:
-	path: Folder1/Folder2/Folder3/
-	filename: Img_0001
-	identifier: 0001
-	extension: .CR2
-	
-	EX:
-	path_1, file_1, id_1, ext_1 = GetFileName(full_path_1)
-	]]
-	local path = string.match(full_path, ".*[\\/]")
-	local filename = string.gsub(string.match(full_path, "[%w-_]*%.") , "%." , "" ) 
-	local identifier = string.match(filename, "%d*$")
-	local extension = string.match(full_path, "%.%w*")
+    
+    Returns:
+    path: Folder1/Folder2/Folder3/
+    filename: Img_0001
+    identifier: 0001
+    extension: .CR2
+    
+    EX:
+    path_1, file_1, id_1, ext_1 = GetFileName(full_path_1)
+    ]]
+    local path = string.match(full_path, ".*[\\/]")
+    local filename = string.gsub(string.match(full_path, "[%w-_]*%.") , "%." , "" ) 
+    local identifier = string.match(filename, "%d*$")
+    local extension = string.match(full_path, "%.%w*")
     return path, filename, identifier, extension
 end
 
 local function CleanSpaces(text) --removes spaces from the front and back of passed in text
-	text = string.gsub(text,'^%s*','')
-	text = string.gsub(text,'%s*$','')
-	return text
+    text = string.gsub(text,'^%s*','')
+    text = string.gsub(text,'%s*$','')
+    return text
 end
 
 local function BuildExecuteCmd(prog_table) --creates a program command using elements of the passed in program table
-	local result = CleanSpaces(prog_table.bin)..' '..CleanSpaces(prog_table.arg_string)..' '..CleanSpaces(prog_table.images_string)
-	return result
+    local result = CleanSpaces(prog_table.bin)..' '..CleanSpaces(prog_table.arg_string)..' '..CleanSpaces(prog_table.images_string)
+    return result
 end
 
 local function PreCall(prog_tbls) --looks to see if this is the first call, if so checks to see if program is installed properly
-	for _,prog in pairs(prog_tbls) do
-		if prog.first_run then
-			prog.bin = df.check_if_bin_exists(prog.name)
-			if not prog.bin then 
-				prog.install_error = true
-			else
-				prog.bin = CleanSpaces(prog.bin)
-			end
-			prog.first_run = false
-		end
-	end
+    for _,prog in pairs(prog_tbls) do
+        if prog.first_run then
+            prog.bin = df.check_if_bin_exists(prog.name)
+            if not prog.bin then 
+                prog.install_error = true
+            else
+                prog.bin = CleanSpaces(prog.bin)
+            end
+            prog.first_run = false
+        end
+    end
 end
 
 local function GetArgsFromPreference(prog_table, prefix) --for each arg in a program table reads in the associated value in the active preference (which is continually updated via clicked/changed callback in GUI elements
-	prog_table.arg_string = ''
-	for argument, arg_data in pairs(prog_table.args) do
-		local temp = dt.preferences.read(mod, prefix..argument, arg_data.style)
-		if arg_data.style == 'bool' and temp then
-			prog_table.arg_string = prog_table.arg_string..arg_data.text..' '
-		elseif arg_data.style == 'integer' or arg_data.style == 'string' then
-			prog_table.arg_string = prog_table.arg_string..arg_data.text..temp..' '
-		elseif arg_data.style == 'float' then
-			temp = string.sub(tostring(temp),1,3)
-			prog_table.arg_string = prog_table.arg_string..arg_data.text..temp..' '
-		end
-	end
-	prog_table.arg_string = CleanSpaces(prog_table.arg_string)
-	return prog_table.arg_string
+    prog_table.arg_string = ''
+    for argument, arg_data in pairs(prog_table.args) do
+        local temp = dt.preferences.read(mod, prefix..argument, arg_data.style)
+        if arg_data.style == 'bool' and temp then
+            prog_table.arg_string = prog_table.arg_string..arg_data.text..' '
+        elseif arg_data.style == 'integer' or arg_data.style == 'string' then
+            prog_table.arg_string = prog_table.arg_string..arg_data.text..temp..' '
+        elseif arg_data.style == 'float' then
+            temp = string.sub(tostring(temp),1,3)
+            prog_table.arg_string = prog_table.arg_string..arg_data.text..temp..' '
+        end
+    end
+    prog_table.arg_string = CleanSpaces(prog_table.arg_string)
+    return prog_table.arg_string
 end
 
 local function UpdateAISargs(image_table, images_to_remove) --updates the AIS arguments, builds the input image string, returns a modified image table which contains the aligned image names in place of the exported image names also updates the images to remove string with new aligned images and a string of the images to align
-	GetArgsFromPreference(AIS, 'active_')
-	local source_path = ''
-	local images_to_align = ''
-	local index = 0
-	for raw, temp_image in pairs(image_table) do
-		local index_str = ''
-		source_path = GetFileName(temp_image)
-		images_to_align = images_to_align..df.sanitize_filename(temp_image)..' '
-		if InRange(index,0,9) then index_str = '000'..tostring(index)
-		elseif InRange(index,10,99) then index_str = '00'..tostring(index)
-		end
-		image_table[raw] = source_path..'aligned_'..index_str..'.tif'
-		images_to_remove = images_to_remove..df.sanitize_filename(image_table[raw])..' '
-		index = index + 1
-	end
-	source_path = df.sanitize_filename(source_path..'aligned_')
-	AIS.arg_string = AIS.arg_string..' -a '..source_path
-	images_to_align = CleanSpaces(images_to_align)
-	
-	return image_table, images_to_remove, images_to_align
+    GetArgsFromPreference(AIS, 'active_')
+    local source_path = ''
+    local images_to_align = ''
+    local index = 0
+    for raw, temp_image in pairs(image_table) do
+        local index_str = ''
+        source_path = GetFileName(temp_image)
+        images_to_align = images_to_align..df.sanitize_filename(temp_image)..' '
+        if InRange(index,0,9) then index_str = '000'..tostring(index)
+        elseif InRange(index,10,99) then index_str = '00'..tostring(index)
+        end
+        image_table[raw] = source_path..'aligned_'..index_str..'.tif'
+        images_to_remove = images_to_remove..df.sanitize_filename(image_table[raw])..' '
+        index = index + 1
+    end
+    source_path = df.sanitize_filename(source_path..'aligned_')
+    AIS.arg_string = AIS.arg_string..' -a '..source_path
+    images_to_align = CleanSpaces(images_to_align)
+    
+    return image_table, images_to_remove, images_to_align
 end
 
 local function UpdateENFargs(image_table, prefix) --updates the Enfuse arguments, builds the input image string, generates output filename, returns string of images to blend, the name of the outout image, and the first raw image object
-	GetArgsFromPreference(ENF, prefix)
-	local images_to_blend = ''
-	local out_path = ''
-	local out_name = ''
-	local smallest_name = ''
-	local smallest_id = math.huge
-	local largest_id = 0
-	local first_raw = {}
-	for raw, temp_image in pairs(image_table) do
-		_, source_name, source_id = GetFileName(raw.filename)
-		source_id = tonumber(source_id)
-		if source_id < smallest_id then 
-			smallest_id = source_id
-			smallest_name = source_name
-			first_raw = raw
-		end
-		if source_id > largest_id then largest_id = source_id end
-		out_path = raw.path
-		images_to_blend = images_to_blend..df.sanitize_filename(temp_image)..' '
-	end
-	ENF.arg_string = ENF.arg_string..' --depth='..GUI.Target.depth.value..' '
-	if GUI.Target.format.value == "tif" then ENF.arg_string = ENF.arg_string..'--compression='..GUI.Target.compression_level_tif.value..' '
-	elseif GUI.Target.format.value == "jpg" then ENF.arg_string = ENF.arg_string..'--compression='..GUI.Target.compression_level_jpg.value..' '
-	end
-	if not GUI.Target.source_location.value then out_path = GUI.Target.output_directory.value end
-	out_name = smallest_name..'-'..largest_id
-	out_path = out_path..os_path_seperator..out_name..'.'..GUI.Target.format.value
-	if GUI.Target.on_conflict.value == 'create unique filename' then out_path = df.create_unique_filename(out_path) end
-	ENF.arg_string = ENF.arg_string..'--output='..df.sanitize_filename(out_path)
-	images_to_blend = CleanSpaces(images_to_blend)
-	
-	return images_to_blend, out_path, first_raw
+    GetArgsFromPreference(ENF, prefix)
+    local images_to_blend = ''
+    local out_path = ''
+    local out_name = ''
+    local smallest_name = ''
+    local smallest_id = math.huge
+    local largest_id = 0
+    local first_raw = {}
+    for raw, temp_image in pairs(image_table) do
+        _, source_name, source_id = GetFileName(raw.filename)
+        source_id = tonumber(source_id)
+        if source_id < smallest_id then 
+            smallest_id = source_id
+            smallest_name = source_name
+            first_raw = raw
+        end
+        if source_id > largest_id then largest_id = source_id end
+        out_path = raw.path
+        images_to_blend = images_to_blend..df.sanitize_filename(temp_image)..' '
+    end
+    ENF.arg_string = ENF.arg_string..' --depth='..GUI.Target.depth.value..' '
+    if GUI.Target.format.value == "tif" then ENF.arg_string = ENF.arg_string..'--compression='..GUI.Target.compression_level_tif.value..' '
+    elseif GUI.Target.format.value == "jpg" then ENF.arg_string = ENF.arg_string..'--compression='..GUI.Target.compression_level_jpg.value..' '
+    end
+    if not GUI.Target.source_location.value then out_path = GUI.Target.output_directory.value end
+    out_name = smallest_name..'-'..largest_id
+    out_path = out_path..os_path_seperator..out_name..'.'..GUI.Target.format.value
+    if GUI.Target.on_conflict.value == 'create unique filename' then out_path = df.create_unique_filename(out_path) end
+    ENF.arg_string = ENF.arg_string..'--output='..df.sanitize_filename(out_path)
+    images_to_blend = CleanSpaces(images_to_blend)
+    
+    return images_to_blend, out_path, first_raw
 end
 
 local function UpdateActivePreference() --sliders & entry boxes do not have a click/changed callback, so their values must be saved to the active preference 'manually'
-	local enf = {'exposure_weight','saturation_weight','contrast_weight','exposure_optimum','exposure_width'}
-	for _,descriptor in pairs(enf) do
-		temp = GUI.ENF[descriptor].value
-		dt.preferences.write(mod, 'active_'..descriptor, 'float', temp)
-	end
-	temp = GUI.Target.compression_level_jpg.value
-	temp = math.floor(temp)
-	dt.preferences.write(mod, 'active_compression_level_jpg', 'integer', temp)
-	temp = GUI.Target.add_tags.text
-	dt.preferences.write(mod, 'active_add_tags', 'string', temp)
+    local enf = {'exposure_weight','saturation_weight','contrast_weight','exposure_optimum','exposure_width'}
+    for _,descriptor in pairs(enf) do
+        temp = GUI.ENF[descriptor].value
+        dt.preferences.write(mod, 'active_'..descriptor, 'float', temp)
+    end
+    temp = GUI.Target.compression_level_jpg.value
+    temp = math.floor(temp)
+    dt.preferences.write(mod, 'active_compression_level_jpg', 'integer', temp)
+    temp = GUI.Target.add_tags.text
+    dt.preferences.write(mod, 'active_add_tags', 'string', temp)
 end
 
 local function SaveToPreference(preset) --save the present values of enfuse GUI elements to the specified "preset"
-	UpdateActivePreference()
-	for argument, arg_data in pairs(ENF.args) do
-		local temp
-		if argument == 'contrast_window_size' or argument == 'contrast_edge_scale' or argument == 'contrast_min_curvature' then	--comboboxes must be handled specially via an index value
-			temp = dt.preferences.read(mod, 'active_'..argument..'_ind', 'integer')
-			dt.preferences.write(mod, preset..argument..'_ind', 'integer', temp)
-			temp = dt.preferences.read(mod, 'active_'..argument, arg_data.style)
-			dt.preferences.write(mod, preset..argument, arg_data.style, temp)
-		else
-			temp = dt.preferences.read(mod, 'active_'..argument, arg_data.style)
-			dt.preferences.write(mod, preset..argument, arg_data.style, temp)
-		end
-	end
-	dt.print('saved to '..preset)
+    UpdateActivePreference()
+    for argument, arg_data in pairs(ENF.args) do
+        local temp
+        if argument == 'contrast_window_size' or argument == 'contrast_edge_scale' or argument == 'contrast_min_curvature' then --comboboxes must be handled specially via an index value
+            temp = dt.preferences.read(mod, 'active_'..argument..'_ind', 'integer')
+            dt.preferences.write(mod, preset..argument..'_ind', 'integer', temp)
+            temp = dt.preferences.read(mod, 'active_'..argument, arg_data.style)
+            dt.preferences.write(mod, preset..argument, arg_data.style, temp)
+        else
+            temp = dt.preferences.read(mod, 'active_'..argument, arg_data.style)
+            dt.preferences.write(mod, preset..argument, arg_data.style, temp)
+        end
+    end
+    dt.print('saved to '..preset)
 end
 
 local function LoadFromPreference(preset) --load values from the specified "preset" into the GUI elements
-	for argument, arg_data in pairs(ENF.args) do
-	local temp
-		if argument == 'contrast_window_size' or argument == 'contrast_edge_scale' or argument == 'contrast_min_curvature' then	 --comboboxes must be handled specially via an index value
-			temp = dt.preferences.read(mod, preset..argument..'_ind', 'integer')
-			GUI.ENF[argument].selected = temp
-			dt.preferences.write(mod, 'active_'..argument..'_ind', 'integer', temp)
-		else
-			temp = dt.preferences.read(mod, preset..argument, arg_data.style)
-			GUI.ENF[argument].value = temp
-			dt.preferences.write(mod, 'active_'..argument, arg_data.style, temp)
-		end		
-	end
-	dt.print('loaded from '..preset)
+    for argument, arg_data in pairs(ENF.args) do
+    local temp
+        if argument == 'contrast_window_size' or argument == 'contrast_edge_scale' or argument == 'contrast_min_curvature' then  --comboboxes must be handled specially via an index value
+            temp = dt.preferences.read(mod, preset..argument..'_ind', 'integer')
+            GUI.ENF[argument].selected = temp
+            dt.preferences.write(mod, 'active_'..argument..'_ind', 'integer', temp)
+        else
+            temp = dt.preferences.read(mod, preset..argument, arg_data.style)
+            GUI.ENF[argument].value = temp
+            dt.preferences.write(mod, 'active_'..argument, arg_data.style, temp)
+        end     
+    end
+    dt.print('loaded from '..preset)
 end
 
 local function remove_temp_files(images_to_remove) --deletes all files specified by the input string
-	if dt.configuration.running_os == "windows" then
-		dt.control.execute("del "..images_to_remove)
-	else
-		dt.control.execute("rm "..images_to_remove)
-	end
+    if dt.configuration.running_os == "windows" then
+        dt.control.execute("del "..images_to_remove)
+    else
+        dt.control.execute("rm "..images_to_remove)
+    end
 end
 
 local function initial(storage, format, images, high_quality, extra_data) --called before export happens, ensure enough images selected and all necesary programs installed correctly, if error then it sets a bit in extra_data for use by main and cancels export
-	if #images <2 then
-		table.insert(extra_data, 1, 1)
-		return {}
-	else
-		PreCall({ENF,AIS,EXF})
-		if AIS.install_error or ENF.install_error or EXF.install_error then
-			table.insert(extra_data, 1, 2)
-			return {}
-		else
-			table.insert(extra_data, 1, 0)
-			return images
-		end
-	end
+    if #images <2 then
+        table.insert(extra_data, 1, 1)
+        return {}
+    else
+        PreCall({ENF,AIS,EXF})
+        if AIS.install_error or ENF.install_error or EXF.install_error then
+            table.insert(extra_data, 1, 2)
+            return {}
+        else
+            table.insert(extra_data, 1, 0)
+            return images
+        end
+    end
 end
 
 local function support_format(storage, format) --tells dt we only support TIFF export type
-	local ret = false
-	local temp = string.find(format.name, 'TIFF')
-	if temp ~= nil then ret = true end
-	return ret
+    local ret = false
+    local temp = string.find(format.name, 'TIFF')
+    if temp ~= nil then ret = true end
+    return ret
 end
 
 local function show_status(storage, image, format, filename, number, total, high_quality, extra_data) --outputs message to user showing script export status
-	dt.print('export for image fusion '..tostring(math.floor(number)).." / "..tostring(math.floor(total)))
+    dt.print('export for image fusion '..tostring(math.floor(number)).." / "..tostring(math.floor(total)))
 end
 
 local function main(storage, image_table, extra_data)
-	if extra_data[1] == 1 then
-		dt.print('too few images selected, please select at least 2 images')
-		return
-	elseif extra_data[1] == 2 then
-		dt.print('installation error, please verify binary paths are proper')
-		return
-	end
-	local images_to_remove = ''
-	local final_image = nil
-	local source_raw = nil
-	for raw,exported in pairs(image_table) do --add the exported files to list of images to remove when complete\fail
-		images_to_remove = images_to_remove..df.sanitize_filename(exported)..' '
-	end
-	if GUI.align.value then --if user selected to align images then update AIS arguments and execute AIS command
-		local job = dt.gui.create_job('aligning images')
-		image_table, images_to_remove, AIS.images_string = UpdateAISargs(image_table, images_to_remove)
-		local run_cmd = BuildExecuteCmd(AIS)
-		local resp = dsys.external_command(run_cmd)
-		job.valid = false
-		if resp ~= 0 then
-			remove_temp_files(images_to_remove)
-			dt.print_error(AIS.name..' failed')
-			dt.print(AIS.name..' failed')
-			return
-		end
-	end
-	variants = {'active_'} --default to 'active' settings unless user selected to create multiple image variants from the specified preset types
-	if GUI.Presets.variants.value then
-		if GUI.Presets.variants_type.value == 'dri' then
-			variants = {'dri_1', 'dri_2', 'dri_3'}
-		else
-			variants = {'dff_2', 'dff_2', 'dff_3'}
-		end
-	end
-	local image_num = 0
-	local job = dt.gui.create_job('blending '..#variants..' image(s)', true) --create a GUI job bar to display enfuse progress
-	UpdateActivePreference() --load current GUI values into active preference (only applies to elements without a clicked/changed callback)
-	for _,prefix in pairs(variants) do --for each image to be created load in the preference values, build arguments string, output image, and run command then execute.
-		job.percent = image_num /(#variants)
-		image_num = image_num+1
-		ENF.images_string, final_image, source_raw = UpdateENFargs(image_table, prefix)
-		local run_cmd = BuildExecuteCmd(ENF)
-		local resp = dsys.external_command(run_cmd)
-		if resp ~= 0 then
-			remove_temp_files(images_to_remove)
-			dt.print_error(ENF.name..' failed')
-			dt.print(ENF.name..' failed')
-			return
-		end
-		
-		--copy exif data from original file
-		run_cmd = EXF.bin.." -TagsFromFile "..df.sanitize_filename(source_raw.path..os_path_seperator..source_raw.filename).." -exif:all --subifd:all -overwrite_original "..df.sanitize_filename(final_image)
-		resp = dsys.external_command(run_cmd)
-		
-		
-		if GUI.Target.auto_import.value then --import image into dt if specified
-			local imported = dt.database.import(final_image)
-			if GUI.Target.apply_style.selected > 1 then --apply specified style to imported image
-				local set_style = styles[GUI.Target.apply_style.selected - 1]
-				dt.styles.apply(set_style , imported)
-			end
-			if GUI.Target.copy_tags.value then --copy tags from source image
-				local all_tags = dt.tags.get_tags(source_raw) 
-				for _,tag in pairs(all_tags) do
-					if string.match(tag.name, 'darktable|') == nil then dt.tags.attach(tag, imported) end
-				end
-			end
-			local set_tag = GUI.Target.add_tags.text
-			if set_tag ~= nil then --add additional user-specified tags
-				for tag in string.gmatch(set_tag, '[^,]+') do
-					tag = CleanSpaces(tag)
-					tag = dt.tags.create(tag)
-					dt.tags.attach(tag, imported) 
-				end
-			end
-		end
-	end
-	remove_temp_files(images_to_remove)
-	job.valid = false
-	dt.print('image fusion process complete')
+    if extra_data[1] == 1 then
+        dt.print('too few images selected, please select at least 2 images')
+        return
+    elseif extra_data[1] == 2 then
+        dt.print('installation error, please verify binary paths are proper')
+        return
+    end
+    local images_to_remove = ''
+    local final_image = nil
+    local source_raw = nil
+    for raw,exported in pairs(image_table) do --add the exported files to list of images to remove when complete\fail
+        images_to_remove = images_to_remove..df.sanitize_filename(exported)..' '
+    end
+    if GUI.align.value then --if user selected to align images then update AIS arguments and execute AIS command
+        local job = dt.gui.create_job('aligning images')
+        image_table, images_to_remove, AIS.images_string = UpdateAISargs(image_table, images_to_remove)
+        local run_cmd = BuildExecuteCmd(AIS)
+        local resp = dsys.external_command(run_cmd)
+        job.valid = false
+        if resp ~= 0 then
+            remove_temp_files(images_to_remove)
+            dt.print_error(AIS.name..' failed')
+            dt.print(AIS.name..' failed')
+            return
+        end
+    end
+    variants = {'active_'} --default to 'active' settings unless user selected to create multiple image variants from the specified preset types
+    if GUI.Presets.variants.value then
+        if GUI.Presets.variants_type.value == 'dri' then
+            variants = {'dri_1', 'dri_2', 'dri_3'}
+        else
+            variants = {'dff_2', 'dff_2', 'dff_3'}
+        end
+    end
+    local image_num = 0
+    local job = dt.gui.create_job('blending '..#variants..' image(s)', true) --create a GUI job bar to display enfuse progress
+    UpdateActivePreference() --load current GUI values into active preference (only applies to elements without a clicked/changed callback)
+    for _,prefix in pairs(variants) do --for each image to be created load in the preference values, build arguments string, output image, and run command then execute.
+        job.percent = image_num /(#variants)
+        image_num = image_num+1
+        ENF.images_string, final_image, source_raw = UpdateENFargs(image_table, prefix)
+        local run_cmd = BuildExecuteCmd(ENF)
+        local resp = dsys.external_command(run_cmd)
+        if resp ~= 0 then
+            remove_temp_files(images_to_remove)
+            dt.print_error(ENF.name..' failed')
+            dt.print(ENF.name..' failed')
+            return
+        end
+        
+        --copy exif data from original file
+        run_cmd = EXF.bin.." -TagsFromFile "..df.sanitize_filename(source_raw.path..os_path_seperator..source_raw.filename).." -exif:all --subifd:all -overwrite_original "..df.sanitize_filename(final_image)
+        resp = dsys.external_command(run_cmd)
+        
+        
+        if GUI.Target.auto_import.value then --import image into dt if specified
+            local imported = dt.database.import(final_image)
+            if GUI.Target.apply_style.selected > 1 then --apply specified style to imported image
+                local set_style = styles[GUI.Target.apply_style.selected - 1]
+                dt.styles.apply(set_style , imported)
+            end
+            if GUI.Target.copy_tags.value then --copy tags from source image
+                local all_tags = dt.tags.get_tags(source_raw) 
+                for _,tag in pairs(all_tags) do
+                    if string.match(tag.name, 'darktable|') == nil then dt.tags.attach(tag, imported) end
+                end
+            end
+            local set_tag = GUI.Target.add_tags.text
+            if set_tag ~= nil then --add additional user-specified tags
+                for tag in string.gmatch(set_tag, '[^,]+') do
+                    tag = CleanSpaces(tag)
+                    tag = dt.tags.create(tag)
+                    dt.tags.attach(tag, imported) 
+                end
+            end
+        end
+    end
+    remove_temp_files(images_to_remove)
+    job.valid = false
+    dt.print('image fusion process complete')
 end
 
 --GUI--
 stack_compression = dt.new_widget('stack'){}
 local label_AIS_options= dt.new_widget('section_label'){
-	label = 'image align options'
+    label = 'image align options'
 }
 GUI.align = dt.new_widget('check_button'){
-	label = 'align images',
-	value = dt.preferences.read(mod, 'active_align', 'bool'),
-	tooltip = 'automatically align images prior to enfuse',
-	clicked_callback = function(self) 
-		dt.preferences.write(mod, 'active_align', 'bool', self.value) 
-		for _,widget in pairs(GUI.AIS) do
-			widget.sensitive = self.value
-		end
-	end,
-	reset_callback = function(self) self.value = true end
+    label = 'align images',
+    value = dt.preferences.read(mod, 'active_align', 'bool'),
+    tooltip = 'automatically align images prior to enfuse',
+    clicked_callback = function(self) 
+        dt.preferences.write(mod, 'active_align', 'bool', self.value) 
+        for _,widget in pairs(GUI.AIS) do
+            widget.sensitive = self.value
+        end
+    end,
+    reset_callback = function(self) self.value = true end
 }
 GUI.AIS.radial_distortion = dt.new_widget('check_button'){
-	label = 'optimize radial distortion',
-	value = dt.preferences.read(mod, 'active_radial_distortion', 'bool'),
-	tooltip = 'optimize radial distortion for all images, \nexcept for first',
-	clicked_callback = function(self) dt.preferences.write(mod, 'active_radial_distortion', 'bool', self.value) end,
-	reset_callback = function(self) self.value = true end
+    label = 'optimize radial distortion',
+    value = dt.preferences.read(mod, 'active_radial_distortion', 'bool'),
+    tooltip = 'optimize radial distortion for all images, \nexcept for first',
+    clicked_callback = function(self) dt.preferences.write(mod, 'active_radial_distortion', 'bool', self.value) end,
+    reset_callback = function(self) self.value = true end
 }
 GUI.AIS.optimize_field = dt.new_widget('check_button'){
-	label = 'optimize field of view', 
-	value = dt.preferences.read(mod, 'active_optimize_field', 'bool'),
-	tooltip ='optimize field of view for all images, except for first. \nUseful for aligning focus stacks (DFF) with slightly \ndifferent magnification.',
-	clicked_callback = function(self) dt.preferences.write(mod, 'active_optimize_field', 'bool', self.value) end,
-	reset_callback = function(self) self.value = true end
+    label = 'optimize field of view', 
+    value = dt.preferences.read(mod, 'active_optimize_field', 'bool'),
+    tooltip ='optimize field of view for all images, except for first. \nUseful for aligning focus stacks (DFF) with slightly \ndifferent magnification.',
+    clicked_callback = function(self) dt.preferences.write(mod, 'active_optimize_field', 'bool', self.value) end,
+    reset_callback = function(self) self.value = true end
 }
 GUI.AIS.optimize_image_center = dt.new_widget('check_button'){
-	label = 'optimize image center shift', 
-	value = dt.preferences.read(mod, 'active_optimize_image_center', 'bool'),
-	tooltip ='optimize image center shift for all images, \nexcept for first.',
-	clicked_callback = function(self) dt.preferences.write(mod, 'active_optimize_image_center', 'bool', self.value) end,
-	reset_callback = function(self) self.value = true end
+    label = 'optimize image center shift', 
+    value = dt.preferences.read(mod, 'active_optimize_image_center', 'bool'),
+    tooltip ='optimize image center shift for all images, \nexcept for first.',
+    clicked_callback = function(self) dt.preferences.write(mod, 'active_optimize_image_center', 'bool', self.value) end,
+    reset_callback = function(self) self.value = true end
 }
 GUI.AIS.auto_crop = dt.new_widget('check_button'){
-	label = 'auto crop', 
-	value = dt.preferences.read(mod, 'active_auto_crop', 'bool'),
-	tooltip ='auto crop the image to the area covered by all images.',
-	clicked_callback = function(self) dt.preferences.write(mod, 'active_auto_crop', 'bool', self.value) end,
-	reset_callback = function(self) self.value = true end
+    label = 'auto crop', 
+    value = dt.preferences.read(mod, 'active_auto_crop', 'bool'),
+    tooltip ='auto crop the image to the area covered by all images.',
+    clicked_callback = function(self) dt.preferences.write(mod, 'active_auto_crop', 'bool', self.value) end,
+    reset_callback = function(self) self.value = true end
 }
 GUI.AIS.distortion = dt.new_widget('check_button'){
-	label = 'load distortion from lens database', 
-	value = dt.preferences.read(mod, 'active_distortion', 'bool'),
-	tooltip ='try to load distortion information from lens database',
-	clicked_callback = function(self) dt.preferences.write(mod, 'active_distortion', 'bool', self.value) end,
-	reset_callback = function(self) self.value = true end
+    label = 'load distortion from lens database', 
+    value = dt.preferences.read(mod, 'active_distortion', 'bool'),
+    tooltip ='try to load distortion information from lens database',
+    clicked_callback = function(self) dt.preferences.write(mod, 'active_distortion', 'bool', self.value) end,
+    reset_callback = function(self) self.value = true end
 }
 GUI.AIS.gpu = dt.new_widget('check_button'){
-	label = 'use gpu', 
-	value = dt.preferences.read(mod, 'active_gpu', 'bool'),
-	tooltip ='use gpu during alignment',
-	clicked_callback = function(self) dt.preferences.write(mod, 'active_gpu', 'bool', self.value) end,
-	reset_callback = function(self) self.value = true end
+    label = 'use gpu', 
+    value = dt.preferences.read(mod, 'active_gpu', 'bool'),
+    tooltip ='use gpu during alignment',
+    clicked_callback = function(self) dt.preferences.write(mod, 'active_gpu', 'bool', self.value) end,
+    reset_callback = function(self) self.value = true end
 }
 temp = dt.preferences.read(mod, 'active_grid_size_ind', 'integer')
 if not InRange(temp, 1, 9) then temp = 5 end 
 GUI.AIS.grid_size = dt.new_widget('combobox'){
-	label = 'image grid size', 
-	tooltip ='break image into a rectangular grid \nand attempt to find num control points in each section.\ndefault: (5x5)',
-	selected = temp,
-	'1','2','3','4','5','6','7','8','9',
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_grid_size', 'integer', self.value) 
-		dt.preferences.write(mod, 'active_grid_size_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 5
-		dt.preferences.write(mod, 'active_grid_size', 'integer', self.value) 
-		dt.preferences.write(mod, 'active_grid_size_ind', 'integer', self.selected)
-	end
+    label = 'image grid size', 
+    tooltip ='break image into a rectangular grid \nand attempt to find num control points in each section.\ndefault: (5x5)',
+    selected = temp,
+    '1','2','3','4','5','6','7','8','9',
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_grid_size', 'integer', self.value) 
+        dt.preferences.write(mod, 'active_grid_size_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 5
+        dt.preferences.write(mod, 'active_grid_size', 'integer', self.value) 
+        dt.preferences.write(mod, 'active_grid_size_ind', 'integer', self.selected)
+    end
 } 
 temp = dt.preferences.read(mod, 'active_control_points_ind', 'integer')
 if not InRange(temp, 1, 9) then temp = 8 end 
 GUI.AIS.control_points = dt.new_widget('combobox'){
-	label = 'control points/grid', 
-	tooltip ='number of control points (per grid, see option -g) \nto create between adjacent images \ndefault: (8).',
-	selected = temp,
-	'1','2','3','4','5','6','7','8','9',             
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_control_points', 'integer', self.value) 
-		dt.preferences.write(mod, 'active_control_points_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 8
-		dt.preferences.write(mod, 'active_control_points', 'integer', self.value) 
-		dt.preferences.write(mod, 'active_control_points_ind', 'integer', self.selected)
-	end
+    label = 'control points/grid', 
+    tooltip ='number of control points (per grid, see option -g) \nto create between adjacent images \ndefault: (8).',
+    selected = temp,
+    '1','2','3','4','5','6','7','8','9',             
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_control_points', 'integer', self.value) 
+        dt.preferences.write(mod, 'active_control_points_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 8
+        dt.preferences.write(mod, 'active_control_points', 'integer', self.value) 
+        dt.preferences.write(mod, 'active_control_points_ind', 'integer', self.selected)
+    end
 } 
 temp = dt.preferences.read(mod, 'active_control_points_remove_ind', 'integer')
 if not InRange(temp, 1, 9) then temp = 3 end 
 GUI.AIS.control_points_remove = dt.new_widget('combobox'){
-	label = 'remove control points with error', 
-	tooltip ='remove all control points with an error higher \nthan num pixels \ndefault: (3)',
-	selected = temp,
-	'1','2','3','4','5','6','7','8','9',             
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_control_points_remove', 'integer', self.value) 
-		dt.preferences.write(mod, 'active_control_points_remove_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 3
-		dt.preferences.write(mod, 'active_control_points_remove', 'integer', self.value) 
-		dt.preferences.write(mod, 'active_control_points_remove_ind', 'integer', self.selected)
-	end
+    label = 'remove control points with error', 
+    tooltip ='remove all control points with an error higher \nthan num pixels \ndefault: (3)',
+    selected = temp,
+    '1','2','3','4','5','6','7','8','9',             
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_control_points_remove', 'integer', self.value) 
+        dt.preferences.write(mod, 'active_control_points_remove_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 3
+        dt.preferences.write(mod, 'active_control_points_remove', 'integer', self.value) 
+        dt.preferences.write(mod, 'active_control_points_remove_ind', 'integer', self.selected)
+    end
 }
 temp = dt.preferences.read(mod, 'active_correlation_ind', 'integer')
 if not InRange(temp, 1, 10) then temp = 9 end 
 GUI.AIS.correlation  = dt.new_widget('combobox'){
-	label = 'correlation threshold for control points', 
-	tooltip ='correlation threshold for identifying \ncontrol points \ndefault: (0.9).',
-	selected = temp,
-	'0.1','0.2','0.3','0.4','0.5','0.6','0.7','0.8','0.9','1.0',     
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_correlation', 'float', self.value) 
-		dt.preferences.write(mod, 'active_correlation_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 9
-		dt.preferences.write(mod, 'active_correlation', 'float', self.value) 
-		dt.preferences.write(mod, 'active_correlation_ind', 'integer', self.selected)
-	end
+    label = 'correlation threshold for control points', 
+    tooltip ='correlation threshold for identifying \ncontrol points \ndefault: (0.9).',
+    selected = temp,
+    '0.1','0.2','0.3','0.4','0.5','0.6','0.7','0.8','0.9','1.0',     
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_correlation', 'float', self.value) 
+        dt.preferences.write(mod, 'active_correlation_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 9
+        dt.preferences.write(mod, 'active_correlation', 'float', self.value) 
+        dt.preferences.write(mod, 'active_correlation_ind', 'integer', self.selected)
+    end
 } 
 local label_ENF_options= dt.new_widget('section_label'){
-	label = 'image fusion options'
+    label = 'image fusion options'
 }
 temp = dt.preferences.read(mod, 'active_exposure_weight', 'float')
 if not InRange(temp, 0, 1) then temp = 1 end
 GUI.ENF.exposure_weight = dt.new_widget('slider'){
-	label = 'exposure weight',
-	tooltip = 'set the relative weight of the well-exposedness criterion \nas defined by the chosen exposure weight function. \nincreasing this weight relative to the others will\n make well-exposed pixels contribute more to\n the final output. \ndefault: (1.0)',
-	hard_min = 0,
-	hard_max = 1,
-	value = temp,
-	reset_callback = function(self) 
-		self.value = 1
-	end
+    label = 'exposure weight',
+    tooltip = 'set the relative weight of the well-exposedness criterion \nas defined by the chosen exposure weight function. \nincreasing this weight relative to the others will\n make well-exposed pixels contribute more to\n the final output. \ndefault: (1.0)',
+    hard_min = 0,
+    hard_max = 1,
+    value = temp,
+    reset_callback = function(self) 
+        self.value = 1
+    end
 }
 temp = dt.preferences.read(mod, 'active_saturation_weight', 'float')
 if not InRange(temp, 0, 1) then temp = .2 end
 GUI.ENF.saturation_weight = dt.new_widget('slider'){
-	label = 'saturation weight',
-	tooltip = 'set the relative weight of high-saturation pixels. \nincreasing this weight makes pixels with high \nsaturation contribute more to the final output. \ndefault: (0.2)',
-	hard_min = 0,
-	hard_max = 1,
-	value = temp,
-	reset_callback = function(self) 
-		self.value = 0.2
-	end
+    label = 'saturation weight',
+    tooltip = 'set the relative weight of high-saturation pixels. \nincreasing this weight makes pixels with high \nsaturation contribute more to the final output. \ndefault: (0.2)',
+    hard_min = 0,
+    hard_max = 1,
+    value = temp,
+    reset_callback = function(self) 
+        self.value = 0.2
+    end
 }
 temp = dt.preferences.read(mod, 'active_contrast_weight', 'float')
 if not InRange(temp, 0, 1) then temp = 0 end
 GUI.ENF.contrast_weight = dt.new_widget('slider'){
-	label = 'contrast weight',
-	tooltip = 'sets the relative weight of high local-contrast pixels. \ndefault: (0.0).',
-	hard_min = 0,
-	hard_max = 1,
-	value = temp,
-	reset_callback = function(self) 
-		self.value = 0
-	end
+    label = 'contrast weight',
+    tooltip = 'sets the relative weight of high local-contrast pixels. \ndefault: (0.0).',
+    hard_min = 0,
+    hard_max = 1,
+    value = temp,
+    reset_callback = function(self) 
+        self.value = 0
+    end
 }
 temp = dt.preferences.read(mod, 'active_exposure_optimum', 'float')
 if not InRange(temp, 0, 1) then temp = 0.5 end
 GUI.ENF.exposure_optimum = dt.new_widget('slider'){
-	label = 'exposure optimum',
-	tooltip = 'determine at what normalized exposure value\n the optimum exposure of the input images\n is. this is, set the position of the maximum\n of the exposure weight curve. use this \noption to fine-tune exposure weighting. \ndefault: (0.5)',
-	hard_min = 0,
-	hard_max = 1,
-	value = temp,
-	reset_callback = function(self) 
-		self.value = 0.5
-	end
+    label = 'exposure optimum',
+    tooltip = 'determine at what normalized exposure value\n the optimum exposure of the input images\n is. this is, set the position of the maximum\n of the exposure weight curve. use this \noption to fine-tune exposure weighting. \ndefault: (0.5)',
+    hard_min = 0,
+    hard_max = 1,
+    value = temp,
+    reset_callback = function(self) 
+        self.value = 0.5
+    end
 }
 temp = dt.preferences.read(mod, 'active_exposure_width', 'float')
 if not InRange(temp, 0, 1) then temp = 0.2 end
 GUI.ENF.exposure_width = dt.new_widget('slider'){
-	label = 'exposure width',
-	tooltip = 'set the characteristic width (FWHM) of the exposure \nweight function. low numbers give less weight to \npixels that are far from the user-defined \noptimum and vice versa. use this option to \nfine-tune exposure weighting. \ndefault: (0.2)',
-	hard_min = 0,
-	hard_max = 1,
-	value = temp,
-	reset_callback = function(self) 
-		self.value = 0.2
-	end
+    label = 'exposure width',
+    tooltip = 'set the characteristic width (FWHM) of the exposure \nweight function. low numbers give less weight to \npixels that are far from the user-defined \noptimum and vice versa. use this option to \nfine-tune exposure weighting. \ndefault: (0.2)',
+    hard_min = 0,
+    hard_max = 1,
+    value = temp,
+    reset_callback = function(self) 
+        self.value = 0.2
+    end
 }
 GUI.ENF.hard_masks = dt.new_widget('check_button'){
-	label = 'hard mask', 
-	value = dt.preferences.read(mod, 'active_hard_masks', 'bool'),
-	tooltip ='force hard blend masks on the finest scale. this avoids \naveraging of fine details (only), at the expense \nof increasing the noise. this improves the \nsharpness of focus stacks considerably.\ndefault (soft mask)',   
-	clicked_callback = function(self) dt.preferences.write(mod, 'active_hard_masks', 'bool', self.value) end,
-	reset_callback = function(self) self.value = false end
+    label = 'hard mask', 
+    value = dt.preferences.read(mod, 'active_hard_masks', 'bool'),
+    tooltip ='force hard blend masks on the finest scale. this avoids \naveraging of fine details (only), at the expense \nof increasing the noise. this improves the \nsharpness of focus stacks considerably.\ndefault (soft mask)',   
+    clicked_callback = function(self) dt.preferences.write(mod, 'active_hard_masks', 'bool', self.value) end,
+    reset_callback = function(self) self.value = false end
 }
 GUI.ENF.save_masks = dt.new_widget('check_button'){
-	label = 'save masks', 
-	value = dt.preferences.read(mod, 'active_save_masks', 'bool'),
-	tooltip ='Save the generated weight masks to your home directory,\nenblend saves masks as 8 bit grayscale, \ni.e. single channel images. \nfor accuracy we recommend to choose a lossless format.',  
-	clicked_callback = function(self) dt.preferences.write(mod, 'active_save_masks', 'bool', self.value) end,
-	reset_callback = function(self) self.value = false end
+    label = 'save masks', 
+    value = dt.preferences.read(mod, 'active_save_masks', 'bool'),
+    tooltip ='Save the generated weight masks to your home directory,\nenblend saves masks as 8 bit grayscale, \ni.e. single channel images. \nfor accuracy we recommend to choose a lossless format.',  
+    clicked_callback = function(self) dt.preferences.write(mod, 'active_save_masks', 'bool', self.value) end,
+    reset_callback = function(self) self.value = false end
 }
 temp = dt.preferences.read(mod, 'active_contrast_window_size_ind', 'integer')
 if not InRange(temp, 1, 8) then temp = 3 end 
 GUI.ENF.contrast_window_size = dt.new_widget('combobox'){
-	label = 'contrast window size', 
-	tooltip ='set the window size for local contrast analysis. \nthe window will be a square of size × size pixels. \nif given an even size, Enfuse will \nautomatically use the next odd number.\nfor contrast analysis size values larger \nthan 5 pixels might result in a \nblurry composite image. values of 3 and \n5 pixels have given good results on \nfocus stacks. \ndefault: (5) pixels',
-	selected = temp,
-	'3','4','5','6','7','8','9','10',
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_contrast_window_size', 'integer', self.value) 
-		dt.preferences.write(mod, 'active_contrast_window_size_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 3
-		dt.preferences.write(mod, 'active_contrast_window_size', 'integer', self.value) 
-		dt.preferences.write(mod, 'active_contrast_window_size_ind', 'integer', self.selected)
-	end
+    label = 'contrast window size', 
+    tooltip ='set the window size for local contrast analysis. \nthe window will be a square of size × size pixels. \nif given an even size, Enfuse will \nautomatically use the next odd number.\nfor contrast analysis size values larger \nthan 5 pixels might result in a \nblurry composite image. values of 3 and \n5 pixels have given good results on \nfocus stacks. \ndefault: (5) pixels',
+    selected = temp,
+    '3','4','5','6','7','8','9','10',
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_contrast_window_size', 'integer', self.value) 
+        dt.preferences.write(mod, 'active_contrast_window_size_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 3
+        dt.preferences.write(mod, 'active_contrast_window_size', 'integer', self.value) 
+        dt.preferences.write(mod, 'active_contrast_window_size_ind', 'integer', self.selected)
+    end
 } 
 temp = dt.preferences.read(mod, 'active_contrast_edge_scale_ind', 'integer')
 if not InRange(temp, 1, 6) then temp = 1 end 
 GUI.ENF.contrast_edge_scale = dt.new_widget('combobox'){
-	label = 'contrast edge scale', 
-	tooltip ='a non-zero value for EDGE-SCALE switches on the \nLaplacian-of-Gaussian (LoG) edge detection algorithm.\n edage-scale is the radius of the Gaussian used \nin the search for edges. a positive LCE-SCALE \nturns on local contrast enhancement (LCE) \nbefore the LoG edge detection. \nDefault: (0.0) pixels.',
-	selected = temp,
-	'0.0','0.1','0.2','0.3','0.4','0.5',
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_contrast_edge_scale', 'float', self.value) 
-		dt.preferences.write(mod, 'active_contrast_edge_scale_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 1
-		dt.preferences.write(mod, 'active_contrast_edge_scale', 'float', self.value) 
-		dt.preferences.write(mod, 'active_contrast_edge_scale_ind', 'integer', self.selected)
-	end
+    label = 'contrast edge scale', 
+    tooltip ='a non-zero value for EDGE-SCALE switches on the \nLaplacian-of-Gaussian (LoG) edge detection algorithm.\n edage-scale is the radius of the Gaussian used \nin the search for edges. a positive LCE-SCALE \nturns on local contrast enhancement (LCE) \nbefore the LoG edge detection. \nDefault: (0.0) pixels.',
+    selected = temp,
+    '0.0','0.1','0.2','0.3','0.4','0.5',
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_contrast_edge_scale', 'float', self.value) 
+        dt.preferences.write(mod, 'active_contrast_edge_scale_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 1
+        dt.preferences.write(mod, 'active_contrast_edge_scale', 'float', self.value) 
+        dt.preferences.write(mod, 'active_contrast_edge_scale_ind', 'integer', self.selected)
+    end
 }
 temp = dt.preferences.read(mod, 'active_contrast_min_curvature_ind', 'integer')
 if not InRange(temp, 1, 11) then temp = 1 end 
 GUI.ENF.contrast_min_curvature = dt.new_widget('combobox'){
-	label = 'contrast min curvature [%]',
-	tooltip ='define the minimum curvature for the LoG edge detection. Append a ‘%’ to specify the minimum curvature relative to maximum pixel value in the source image. Default: (0.0%)',
-	selected = temp, 
-	'0.0%','0.1%','0.2%','0.3%','0.4%','0.5%','0.6%','0.7%','0.8%','0.9%','1.0%',
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_contrast_min_curvature', 'string', self.value) 
-		dt.preferences.write(mod, 'active_contrast_min_curvature_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 1
-		dt.preferences.write(mod, 'active_contrast_min_curvature', 'string', self.value) 
-		dt.preferences.write(mod, 'active_contrast_min_curvature_ind', 'integer', self.selected)
-	end
+    label = 'contrast min curvature [%]',
+    tooltip ='define the minimum curvature for the LoG edge detection. Append a ‘%’ to specify the minimum curvature relative to maximum pixel value in the source image. Default: (0.0%)',
+    selected = temp, 
+    '0.0%','0.1%','0.2%','0.3%','0.4%','0.5%','0.6%','0.7%','0.8%','0.9%','1.0%',
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_contrast_min_curvature', 'string', self.value) 
+        dt.preferences.write(mod, 'active_contrast_min_curvature_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 1
+        dt.preferences.write(mod, 'active_contrast_min_curvature', 'string', self.value) 
+        dt.preferences.write(mod, 'active_contrast_min_curvature_ind', 'integer', self.selected)
+    end
 } 
 local label_target_options= dt.new_widget('section_label'){
-	label = 'target file'
+    label = 'target file'
 }
 temp = dt.preferences.read(mod, 'active_compression_level_tif_ind', 'integer')
 if not InRange(temp, 1, 4) then temp = 1 end 
 GUI.Target.compression_level_tif = dt.new_widget('combobox'){
-	label = 'tiff compression', 
-	tooltip = 'compression method for tiff files',
-	selected = temp,
-	'none','deflate','lzw','packbits',
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_compression_level_tif', 'string', self.value) 
-		dt.preferences.write(mod, 'active_compression_level_tif_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 1
-		dt.preferences.write(mod, 'active_compression_level_tif', 'string', self.value) 
-		dt.preferences.write(mod, 'active_compression_level_tif_ind', 'integer', self.selected)
-	end	
+    label = 'tiff compression', 
+    tooltip = 'compression method for tiff files',
+    selected = temp,
+    'none','deflate','lzw','packbits',
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_compression_level_tif', 'string', self.value) 
+        dt.preferences.write(mod, 'active_compression_level_tif_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 1
+        dt.preferences.write(mod, 'active_compression_level_tif', 'string', self.value) 
+        dt.preferences.write(mod, 'active_compression_level_tif_ind', 'integer', self.selected)
+    end 
 }
 temp = dt.preferences.read(mod, 'active_compression_level_jpg', 'integer')
 if not InRange(temp, 0, 100) then temp = 0 end
 GUI.Target.compression_level_jpg = dt.new_widget('slider'){
-	label = 'jpeg compression',
-	tooltip = 'jpeg compression level',
-	soft_min = 0,
-	soft_max = 100,
-	hard_min = 0,
-	hard_max = 100,
-	step = 5,
-	digits = 0,
-	value = temp,
-	reset_callback = function(self) 
-		self.value = 0
-	end
+    label = 'jpeg compression',
+    tooltip = 'jpeg compression level',
+    soft_min = 0,
+    soft_max = 100,
+    hard_min = 0,
+    hard_max = 100,
+    step = 5,
+    digits = 0,
+    value = temp,
+    reset_callback = function(self) 
+        self.value = 0
+    end
 }
 local blank = dt.new_widget('box'){}
 stack_compression = dt.new_widget('stack'){
-	GUI.Target.compression_level_tif,
-	GUI.Target.compression_level_jpg,
-	blank,
-	active = 1
+    GUI.Target.compression_level_tif,
+    GUI.Target.compression_level_jpg,
+    blank,
+    active = 1
 }
 temp = dt.preferences.read(mod, 'active_format_ind', 'integer')
 if not InRange(temp, 1, 6) then temp = 1 end 
 GUI.Target.format = dt.new_widget('combobox'){
-	label = 'file format', 
-	tooltip = 'file format of the enfused final image',
-	selected = temp,
-	'tif','jpg','png','pnm','pbm','ppm',
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_format', 'string', self.value) 
-		dt.preferences.write(mod, 'active_format_ind', 'integer', self.selected)
-		if self.value == 'tif' then stack_compression.active = 1
-		elseif self.value == 'jpg' then stack_compression.active = 2
-		else stack_compression.active = 3
-		end
-	end,
-	reset_callback = function(self) 
-		self.selected = 1
-		dt.preferences.write(mod, 'active_format', 'string', self.value) 
-		dt.preferences.write(mod, 'active_format_ind', 'integer', self.selected)
-	end	
+    label = 'file format', 
+    tooltip = 'file format of the enfused final image',
+    selected = temp,
+    'tif','jpg','png','pnm','pbm','ppm',
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_format', 'string', self.value) 
+        dt.preferences.write(mod, 'active_format_ind', 'integer', self.selected)
+        if self.value == 'tif' then stack_compression.active = 1
+        elseif self.value == 'jpg' then stack_compression.active = 2
+        else stack_compression.active = 3
+        end
+    end,
+    reset_callback = function(self) 
+        self.selected = 1
+        dt.preferences.write(mod, 'active_format', 'string', self.value) 
+        dt.preferences.write(mod, 'active_format_ind', 'integer', self.selected)
+    end 
 }
 temp = dt.preferences.read(mod, 'active_depth_ind', 'integer')
 if not InRange(temp, 1, 5) then temp = 3 end 
 GUI.Target.depth = dt.new_widget('combobox'){
-	label = 'bit depth', 
-	tooltip = 'bit depth of the enfused file',
-	selected = temp,
-	'8','16','32','r32','r64',
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_depth', 'string', self.value) 
-		dt.preferences.write(mod, 'active_depth_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 2
-		dt.preferences.write(mod, 'active_depth', 'string', self.value) 
-		dt.preferences.write(mod, 'active_depth_ind', 'integer', self.selected)
-	end	
+    label = 'bit depth', 
+    tooltip = 'bit depth of the enfused file',
+    selected = temp,
+    '8','16','32','r32','r64',
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_depth', 'string', self.value) 
+        dt.preferences.write(mod, 'active_depth_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 2
+        dt.preferences.write(mod, 'active_depth', 'string', self.value) 
+        dt.preferences.write(mod, 'active_depth_ind', 'integer', self.selected)
+    end 
 }
 local label_directory = dt.new_widget("label"){
-	label = 'directory',
-	ellipsize = "start",
-	halign = "start"
+    label = 'directory',
+    ellipsize = "start",
+    halign = "start"
 }
 temp = dt.preferences.read(mod, 'active_output_directory', 'string')
 if temp == '' or temp == nil then temp = dt.collection[1].path end
 GUI.Target.output_directory = dt.new_widget("file_chooser_button"){
-	title = 'Select export path', 
-	is_directory = true,
-	tooltip ='select the target directory for the fused image. \nthe filename is created automatically.',
-	value = temp,
-	changed_callback = function(self) dt.preferences.write(mod, 'active_output_directory', 'string', self.value) end
+    title = 'Select export path', 
+    is_directory = true,
+    tooltip ='select the target directory for the fused image. \nthe filename is created automatically.',
+    value = temp,
+    changed_callback = function(self) dt.preferences.write(mod, 'active_output_directory', 'string', self.value) end
 }
 GUI.Target.source_location = dt.new_widget('check_button'){
-	label = 'save to source image location', 
-	value = dt.preferences.read(mod, 'active_source_location', 'bool'),
-	tooltip ='If checked ignores the location above and saves output image(s) to the same location as the source images.',  
-	clicked_callback = function(self) dt.preferences.write(mod, 'active_source_location', 'bool', self.value) end,
-	reset_callback = function(self) self.value = true end
+    label = 'save to source image location', 
+    value = dt.preferences.read(mod, 'active_source_location', 'bool'),
+    tooltip ='If checked ignores the location above and saves output image(s) to the same location as the source images.',  
+    clicked_callback = function(self) dt.preferences.write(mod, 'active_source_location', 'bool', self.value) end,
+    reset_callback = function(self) self.value = true end
 }
 temp = dt.preferences.read(mod, 'active_on_conflict_ind', 'integer')
 if not InRange(temp, 1, 2) then temp = 1 end 
 GUI.Target.on_conflict = dt.new_widget('combobox'){
-	label = 'on conflict', 
-	selected = temp,  
-	'create unique filename','overwrite',           
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_on_conflict', 'string', self.value) 
-		dt.preferences.write(mod, 'active_on_conflict_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 1
-		dt.preferences.write(mod, 'active_on_conflict', 'string', self.value) 
-		dt.preferences.write(mod, 'active_on_conflict_ind', 'integer', self.selected)
-	end	
+    label = 'on conflict', 
+    selected = temp,  
+    'create unique filename','overwrite',           
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_on_conflict', 'string', self.value) 
+        dt.preferences.write(mod, 'active_on_conflict_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 1
+        dt.preferences.write(mod, 'active_on_conflict', 'string', self.value) 
+        dt.preferences.write(mod, 'active_on_conflict_ind', 'integer', self.selected)
+    end 
 }  
 GUI.Target.auto_import = dt.new_widget('check_button'){
-	label = 'auto import', 
-	value = dt.preferences.read(mod, 'active_auto_import', 'bool'),
-	tooltip ='import the image into darktable database when enfuse completes',	
-	clicked_callback = function(self)
-		dt.preferences.write(mod, 'active_auto_import', 'bool', self.value)
-		GUI.Target.apply_style.sensitive = self.value
-		GUI.Target.copy_tags.sensitive = self.value
-		GUI.Target.add_tags.sensitive = self.value
-	end,
-	reset_callback = function(self) self.value = true end
+    label = 'auto import', 
+    value = dt.preferences.read(mod, 'active_auto_import', 'bool'),
+    tooltip ='import the image into darktable database when enfuse completes',  
+    clicked_callback = function(self)
+        dt.preferences.write(mod, 'active_auto_import', 'bool', self.value)
+        GUI.Target.apply_style.sensitive = self.value
+        GUI.Target.copy_tags.sensitive = self.value
+        GUI.Target.add_tags.sensitive = self.value
+    end,
+    reset_callback = function(self) self.value = true end
 }
 temp = dt.preferences.read(mod, 'active_apply_style_ind', 'integer')
 GUI.Target.apply_style = dt.new_widget('combobox'){
-	label = "Apply Style on Import",
-	tooltip = "Apply selected style on auto-import to newly created blended image",
-	selected = 1,
-	"none",
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_apply_style', 'string', self.value) 
-		dt.preferences.write(mod, 'active_apply_style_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 1
-		dt.preferences.write(mod, 'active_apply_style', 'string', self.value) 
-		dt.preferences.write(mod, 'active_apply_style_ind', 'integer', self.selected)
-	end	
+    label = "Apply Style on Import",
+    tooltip = "Apply selected style on auto-import to newly created blended image",
+    selected = 1,
+    "none",
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_apply_style', 'string', self.value) 
+        dt.preferences.write(mod, 'active_apply_style_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 1
+        dt.preferences.write(mod, 'active_apply_style', 'string', self.value) 
+        dt.preferences.write(mod, 'active_apply_style_ind', 'integer', self.selected)
+    end 
 }
 for k=1, (styles_count-1) do
-	GUI.Target.apply_style[k+1] = styles[k].name
+    GUI.Target.apply_style[k+1] = styles[k].name
 end
 if not InRange(temp, 1, styles_count) then temp = 1 end
 GUI.Target.apply_style.selected = temp
 GUI.Target.copy_tags = dt.new_widget('check_button'){
-	label = 'copy tags', 
-	value = dt.preferences.read(mod, 'active_copy_tags', 'bool'),
-	tooltip ='Copy tags from first image.',	
-	clicked_callback = function(self) dt.preferences.write(mod, 'active_copy_tags', 'bool', self.value) end,
-	reset_callback = function(self) self.value = true end
+    label = 'copy tags', 
+    value = dt.preferences.read(mod, 'active_copy_tags', 'bool'),
+    tooltip ='Copy tags from first image.', 
+    clicked_callback = function(self) dt.preferences.write(mod, 'active_copy_tags', 'bool', self.value) end,
+    reset_callback = function(self) self.value = true end
 }
 temp = dt.preferences.read(mod, 'active_add_tags', 'string')
 if temp == '' then temp = nil end 
 GUI.Target.add_tags = dt.new_widget("entry"){
-	tooltip = "Additional tags to be added on import. Seperate with commas, all spaces will be removed",
-	text = temp,
-	placeholder = "Enter tags, seperated by commas",
-	editable = true
+    tooltip = "Additional tags to be added on import. Seperate with commas, all spaces will be removed",
+    text = temp,
+    placeholder = "Enter tags, seperated by commas",
+    editable = true
 }
 temp = dt.preferences.read(mod, 'active_current_preset_ind', 'integer')
 if not InRange(temp, 1, 6) then temp = 1 end
 GUI.Presets.current_preset = dt.new_widget('combobox'){
-	label = "active preset",
-	tooltip = "preset to be loaded from or saved to",
-	value = temp,
-	'dri_1', 'dri_2', 'dri_3', 'dff_1', 'dff_2', 'dff_3',
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_current_preset', 'string', self.value) 
-		dt.preferences.write(mod, 'active_current_preset_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 1
-		dt.preferences.write(mod, 'active_current_preset', 'string', self.value) 
-		dt.preferences.write(mod, 'active_current_preset_ind', 'integer', self.selected)
-	end	
+    label = "active preset",
+    tooltip = "preset to be loaded from or saved to",
+    value = temp,
+    'dri_1', 'dri_2', 'dri_3', 'dff_1', 'dff_2', 'dff_3',
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_current_preset', 'string', self.value) 
+        dt.preferences.write(mod, 'active_current_preset_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 1
+        dt.preferences.write(mod, 'active_current_preset', 'string', self.value) 
+        dt.preferences.write(mod, 'active_current_preset_ind', 'integer', self.selected)
+    end 
 }
 GUI.Presets.load = dt.new_widget("button"){
-	label = 'laod fusion preset',
-	tooltip ='load current fusion parameters from selected preset',
-	clicked_callback = function() LoadFromPreference(GUI.Presets.current_preset.value) end
+    label = 'laod fusion preset',
+    tooltip ='load current fusion parameters from selected preset',
+    clicked_callback = function() LoadFromPreference(GUI.Presets.current_preset.value) end
 }
 GUI.Presets.save = dt.new_widget("button"){
-	label = 'save to fusion preset',
-	tooltip ='save current fusion parameters to selected preset',
-	clicked_callback = function() SaveToPreference(GUI.Presets.current_preset.value) end
+    label = 'save to fusion preset',
+    tooltip ='save current fusion parameters to selected preset',
+    clicked_callback = function() SaveToPreference(GUI.Presets.current_preset.value) end
 }
 GUI.Presets.variants = dt.new_widget('check_button'){
-	label = 'create image variants from presets', 
-	value = dt.preferences.read(mod, 'active_variants', 'bool'),
-	tooltip ='create multiple image variants based on the three different presets of the specified type',	
-	clicked_callback = function(self) 
-		dt.preferences.write(mod, 'active_variants', 'bool', self.value)
-		if self.value then
-			GUI.Target.on_conflict.selected = 1
-			GUI.Target.on_conflict.sensitive = false
-			GUI.Presets.variants_type.sensitive = true
-		else
-			GUI.Target.on_conflict.sensitive = true
-			GUI.Presets.variants_type.sensitive = false
-		end
-	end,
-	reset_callback = function(self) self.value = false end
+    label = 'create image variants from presets', 
+    value = dt.preferences.read(mod, 'active_variants', 'bool'),
+    tooltip ='create multiple image variants based on the three different presets of the specified type',   
+    clicked_callback = function(self) 
+        dt.preferences.write(mod, 'active_variants', 'bool', self.value)
+        if self.value then
+            GUI.Target.on_conflict.selected = 1
+            GUI.Target.on_conflict.sensitive = false
+            GUI.Presets.variants_type.sensitive = true
+        else
+            GUI.Target.on_conflict.sensitive = true
+            GUI.Presets.variants_type.sensitive = false
+        end
+    end,
+    reset_callback = function(self) self.value = false end
 }
 temp = dt.preferences.read(mod, 'active_variants_type_ind', 'integer')
 if not InRange(temp, 1, 2) then temp = 1 end
 GUI.Presets.variants_type = dt.new_widget('combobox'){
-	label = "create variants type",
-	tooltip = "preset type to be used when creating image variants",
-	selected = temp,
-	'dri', 'dff',
-	changed_callback = function(self)
-		dt.preferences.write(mod, 'active_variants_type', 'string', self.value) 
-		dt.preferences.write(mod, 'active_variants_type_ind', 'integer', self.selected)
-	end,
-	reset_callback = function(self) 
-		self.selected = 1
-		dt.preferences.write(mod, 'active_variants_type', 'string', self.value) 
-		dt.preferences.write(mod, 'active_variants_type_ind', 'integer', self.selected)
-	end	
+    label = "create variants type",
+    tooltip = "preset type to be used when creating image variants",
+    selected = temp,
+    'dri', 'dff',
+    changed_callback = function(self)
+        dt.preferences.write(mod, 'active_variants_type', 'string', self.value) 
+        dt.preferences.write(mod, 'active_variants_type_ind', 'integer', self.selected)
+    end,
+    reset_callback = function(self) 
+        self.selected = 1
+        dt.preferences.write(mod, 'active_variants_type', 'string', self.value) 
+        dt.preferences.write(mod, 'active_variants_type_ind', 'integer', self.selected)
+    end 
 }
 GUI.Presets.variants_type.sensitive = GUI.Presets.variants.value
 temp = GUI.Target.format.value
@@ -965,96 +965,96 @@ else temp = 3
 end
 stack_compression.active = temp
 for _,widget in pairs(GUI.AIS) do
-	widget.sensitive = GUI.align.value
+    widget.sensitive = GUI.align.value
 end
 GUI.Target.apply_style.sensitive = GUI.Target.auto_import.value
 GUI.Target.copy_tags.sensitive = GUI.Target.auto_import.value
 GUI.Target.add_tags.sensitive = GUI.Target.auto_import.value
 
 local box_AIS = dt.new_widget('box'){
-	orientation = 'vertical',
+    orientation = 'vertical',
     label_AIS_options,
-	GUI.align,
-	GUI.AIS.radial_distortion,
-	GUI.AIS.optimize_field,
-	GUI.AIS.optimize_image_center,
-	GUI.AIS.auto_crop,
-	GUI.AIS.distortion,
-	GUI.AIS.gpu,
-	GUI.AIS.grid_size,
-	GUI.AIS.control_points,
-	GUI.AIS.control_points_remove,
-	GUI.AIS.correlation
+    GUI.align,
+    GUI.AIS.radial_distortion,
+    GUI.AIS.optimize_field,
+    GUI.AIS.optimize_image_center,
+    GUI.AIS.auto_crop,
+    GUI.AIS.distortion,
+    GUI.AIS.gpu,
+    GUI.AIS.grid_size,
+    GUI.AIS.control_points,
+    GUI.AIS.control_points_remove,
+    GUI.AIS.correlation
 }
 local box_ENF = dt.new_widget('box'){
-	orientation = 'vertical',
-	label_ENF_options,
-	GUI.ENF.exposure_weight,
-	GUI.ENF.saturation_weight,
-	GUI.ENF.contrast_weight,
-	GUI.ENF.exposure_optimum,
-	GUI.ENF.exposure_width,
-	GUI.ENF.hard_masks,
-	GUI.ENF.save_masks,
-	GUI.ENF.contrast_window_size,
-	GUI.ENF.contrast_edge_scale,
-	GUI.ENF.contrast_min_curvature,
-	GUI.Presets.current_preset,
-	GUI.Presets.load,
-	GUI.Presets.save
+    orientation = 'vertical',
+    label_ENF_options,
+    GUI.ENF.exposure_weight,
+    GUI.ENF.saturation_weight,
+    GUI.ENF.contrast_weight,
+    GUI.ENF.exposure_optimum,
+    GUI.ENF.exposure_width,
+    GUI.ENF.hard_masks,
+    GUI.ENF.save_masks,
+    GUI.ENF.contrast_window_size,
+    GUI.ENF.contrast_edge_scale,
+    GUI.ENF.contrast_min_curvature,
+    GUI.Presets.current_preset,
+    GUI.Presets.load,
+    GUI.Presets.save
 }
 local box_Target = dt.new_widget('box'){
-	orientation = 'vertical',
-	label_target_options,
-	GUI.Target.format,
-	GUI.Target.depth,
-	stack_compression,
-	label_directory,
-	GUI.Target.output_directory,
-	GUI.Target.source_location,
-	GUI.Target.on_conflict,
-	GUI.Presets.variants,
-	GUI.Presets.variants_type,
-	GUI.Target.auto_import,
-	GUI.Target.apply_style,
-	GUI.Target.copy_tags,
-	GUI.Target.add_tags
+    orientation = 'vertical',
+    label_target_options,
+    GUI.Target.format,
+    GUI.Target.depth,
+    stack_compression,
+    label_directory,
+    GUI.Target.output_directory,
+    GUI.Target.source_location,
+    GUI.Target.on_conflict,
+    GUI.Presets.variants,
+    GUI.Presets.variants_type,
+    GUI.Target.auto_import,
+    GUI.Target.apply_style,
+    GUI.Target.copy_tags,
+    GUI.Target.add_tags
 }
 GUI.options_contain = dt.new_widget('stack'){
-	active = 2,
-	box_AIS,
-	box_ENF,
-	box_Target
+    active = 2,
+    box_AIS,
+    box_ENF,
+    box_Target
 }
 GUI.show_options = dt.new_widget('combobox'){
-	label = "show options",
-	tooltip = "show options for specified aspect of output",
-	selected = 1,
-	'align image stack', 'enfuse/enblend', 'target file',
-	changed_callback = function(self)
-		GUI.options_contain.active = self.selected
-	end,
-	reset_callback = function(self) 
-		self.selected = 1
-		dt.preferences.write(mod, 'active_current_preset', 'string', self.value) 
-		dt.preferences.write(mod, 'active_current_preset_ind', 'integer', self.selected)
-	end	
+    label = "show options",
+    tooltip = "show options for specified aspect of output",
+    selected = 1,
+    'align image stack', 'enfuse/enblend', 'target file',
+    changed_callback = function(self)
+        GUI.options_contain.active = self.selected
+    end,
+    reset_callback = function(self) 
+        self.selected = 1
+        dt.preferences.write(mod, 'active_current_preset', 'string', self.value) 
+        dt.preferences.write(mod, 'active_current_preset_ind', 'integer', self.selected)
+    end 
 }
 
 local storage_widget = dt.new_widget("box") {
     orientation = "vertical",
-	GUI.show_options,
-	GUI.options_contain
+    GUI.show_options,
+    GUI.options_contain
 }
-	
+    
 
 -- Register new storage --
 dt.register_storage(
-	"module_enfuseAdvanced", --Module name
-	'DRI or DFF image', --Name
-	show_status, --store: called once per exported image
-	main, --finalize: called once when all images have finished exporting
-	support_format, --supported
-	initial, --initialize
-	storage_widget
-	)
+    "module_enfuseAdvanced", --Module name
+    'DRI or DFF image', --Name
+    show_status, --store: called once per exported image
+    main, --finalize: called once when all images have finished exporting
+    support_format, --supported
+    initial, --initialize
+    storage_widget
+    )

From a5ad5e67f30be12fcd43a032fb53d3e3e87892e9 Mon Sep 17 00:00:00 2001
From: BzKevin <36381472+BzKevin@users.noreply.github.com>
Date: Tue, 12 Mar 2019 13:04:21 -0400
Subject: [PATCH 4/6] Remove executable preferences

The executable choosers have been moved to a box which is now element 4 in the GUI stack. Once the user configures these and presses update they are confirmed good or bad and the GUI changed to normal view if all works out.
---
 contrib/enfuseAdvanced.lua | 103 +++++++++++++++++++++++++++++--------
 1 file changed, 81 insertions(+), 22 deletions(-)

diff --git a/contrib/enfuseAdvanced.lua b/contrib/enfuseAdvanced.lua
index 0f68df9..97a194f 100644
--- a/contrib/enfuseAdvanced.lua
+++ b/contrib/enfuseAdvanced.lua
@@ -65,24 +65,6 @@ local os_path_seperator = '/'
 if dt.configuration.running_os == 'windows' then os_path_seperator = '\\' end
 
 du.check_min_api_version("5.0.0", "enfuseAdvanced") 
-dt.preferences.register("executable_paths", "align_image_stack",    -- name
-    "file", -- type
-    'enfuseAdvanced: Align Image Stack Location',   -- label
-    'Install location of align_image_stack. Requires restart to take effect.',  -- tooltip
-    "align_image_stack" -- default
-)
-dt.preferences.register("executable_paths", "enfuse",   -- name
-    "file", -- type
-    'enfuseAdvanced: enfuse Location',  -- label
-    'Install location of enfuse. Requires restart to take effect.', -- tooltip
-    'enfuse'
-)
-dt.preferences.register("executable_paths", "exiftool", -- name
-    "file", -- type
-    'enfuseAdvanced: exiftool Location',    -- label
-    'Install location of exiftool. Requires restart to take effect.',   -- tooltip
-    "exiftool"  -- default
-)
 
 -- INITS --
 local AIS = {
@@ -172,6 +154,12 @@ local GUI = {
         save                ={};
         variants            ={};
         variants_type       ={}},
+    exes = {
+        align_image_stack = {},
+        enfuse = {},
+        exiftool = {},
+        update = {}
+    },
     align                   = {},
     options_contain         = {},
     show_options            = {}
@@ -228,12 +216,41 @@ local function PreCall(prog_tbls) --looks to see if this is the first call, if s
             prog.bin = df.check_if_bin_exists(prog.name)
             if not prog.bin then 
                 prog.install_error = true
+                dt.preferences.write(mod, 'bin_exists', 'bool', false)
             else
                 prog.bin = CleanSpaces(prog.bin)
             end
             prog.first_run = false
         end
     end
+    if not dt.preferences.read(mod, 'bin_exists', 'bool') then
+        GUI.options_contain.active = 4
+        GUI.show_options.sensitive = false
+        dt.print('please update your binary locations')
+    end
+end
+
+local function ExeUpdate(prog_tbl) --updates executable paths and verifies them
+    dt.preferences.write(mod, 'bin_exists', 'bool', true)
+    for _,prog in pairs(prog_tbl) do
+        dt.preferences.write('executable_paths', prog.name, 'string', GUI.exes[prog.name].value)
+        prog.bin = df.check_if_bin_exists(prog.name)
+        if not prog.bin then 
+            prog.install_error = true
+            dt.preferences.write(mod, 'bin_exists', 'bool', false)
+            dt.print('issue with '..prog.name..' executable')
+        else
+            prog.bin = CleanSpaces(prog.bin)
+        end
+        prog.first_run = false
+    end
+    if dt.preferences.read(mod, 'bin_exists', 'bool') then
+        GUI.options_contain.active = 2
+        GUI.show_options.sensitive = true
+        dt.print('update successful')
+    else
+        dt.print('update unsuccessful, please try again')
+    end
 end
 
 local function GetArgsFromPreference(prog_table, prefix) --for each arg in a program table reads in the associated value in the active preference (which is continually updated via clicked/changed callback in GUI elements
@@ -958,6 +975,35 @@ GUI.Presets.variants_type = dt.new_widget('combobox'){
     end 
 }
 GUI.Presets.variants_type.sensitive = GUI.Presets.variants.value
+temp = df.get_executable_path_preference(AIS.name)
+GUI.exes.align_image_stack = dt.new_widget('file_chooser_button'){
+    title = 'AIS binary path',
+    value = temp,
+    tooltip = temp,
+    is_directory = false,
+    changed_callback = function(self) self.tooltip = self.value end
+}
+temp = df.get_executable_path_preference(ENF.name)
+GUI.exes.enfuse = dt.new_widget('file_chooser_button'){
+    title = 'enfuse binary path',
+    value = temp,
+    tooltip = temp,
+    is_directory = false,
+    changed_callback = function(self) self.tooltip = self.value end
+}
+temp = df.get_executable_path_preference(EXF.name)
+GUI.exes.exiftool = dt.new_widget('file_chooser_button'){
+    title = 'Exiftool binary path',
+    value = temp,
+    tooltip = temp,
+    is_directory = false,
+    changed_callback = function(self) self.tooltip = self.value end
+} 
+GUI.exes.update = dt.new_widget('button'){
+    label = 'update',
+    tooltip ='update the binary paths with current values',
+    clicked_callback = function() ExeUpdate({AIS,ENF,EXF}) end
+}
 temp = GUI.Target.format.value
 if temp == 'tif' then temp = 1
 elseif temp == 'jpg' then temp = 2
@@ -1020,16 +1066,23 @@ local box_Target = dt.new_widget('box'){
     GUI.Target.copy_tags,
     GUI.Target.add_tags
 }
+local box_exes = dt.new_widget('box'){
+    orientation = 'vertical',
+    GUI.exes.align_image_stack,
+    GUI.exes.enfuse,
+    GUI.exes.exiftool,
+    GUI.exes.update
+}
 GUI.options_contain = dt.new_widget('stack'){
-    active = 2,
     box_AIS,
     box_ENF,
-    box_Target
+    box_Target,
+    box_exes
 }
 GUI.show_options = dt.new_widget('combobox'){
     label = "show options",
     tooltip = "show options for specified aspect of output",
-    selected = 1,
+    selected = 2,
     'align image stack', 'enfuse/enblend', 'target file',
     changed_callback = function(self)
         GUI.options_contain.active = self.selected
@@ -1040,7 +1093,13 @@ GUI.show_options = dt.new_widget('combobox'){
         dt.preferences.write(mod, 'active_current_preset_ind', 'integer', self.selected)
     end 
 }
-
+if dt.preferences.read(mod, 'bin_exists', 'bool') then 
+    GUI.options_contain.active = 2
+    GUI.show_options.sensitive = true
+else
+    GUI.options_contain.active = 4
+    GUI.show_options.sensitive = false
+end
 local storage_widget = dt.new_widget("box") {
     orientation = "vertical",
     GUI.show_options,

From fcad7a5733c68ca06d0444d1813b1b2515d67589 Mon Sep 17 00:00:00 2001
From: BzKevin <36381472+BzKevin@users.noreply.github.com>
Date: Fri, 22 Mar 2019 12:01:56 -0400
Subject: [PATCH 5/6] Makte Translatable + others

Made text translatable except for line 499 which kept giving me problems
   Making L499 translatable would throw the following error   lua:499: attempt to call a nil value (upvalue '_')
   Troubleshooting steps taken and results:
        1) Changed the translation function from _() to translate() - this worked, no errors but ugly
        2) Reverted the changes from 1, then changed all "for _, var in table do" to be "for ignore, var in table do" - this did not help

Moved a chunk of code due to anomalous behavior, I suspect previous code was attempting to change the value in the stack widget before it was fully created. Adding in a print statement before trying to change the stack.active would cause things to work fine. Moving it behind the register call also helped.
---
 contrib/enfuseAdvanced.lua | 294 +++++++++++++++++++------------------
 1 file changed, 151 insertions(+), 143 deletions(-)

diff --git a/contrib/enfuseAdvanced.lua b/contrib/enfuseAdvanced.lua
index 97a194f..0557bb0 100644
--- a/contrib/enfuseAdvanced.lua
+++ b/contrib/enfuseAdvanced.lua
@@ -18,7 +18,7 @@
 ]]
 
 --[[About this plugin
-This plugin will add the new export module "fusion to DRI or DFF image".
+This plugin will add the new export module 'fusion to DRI or DFF image'.
    
 ----REQUIRED SOFTWARE----
 align_image_stack
@@ -27,12 +27,12 @@ exiftool
 
 ----USAGE----
 Install: (see here for more detail: https://github.com/darktable-org/lua-scripts )
- 1) Copy this file in to your "lua/contrib" folder where all other scripts reside. 
+ 1) Copy this file in to your 'lua/contrib' folder where all other scripts reside. 
  2) Require this file in your luarc file, as with any other dt plug-in
 On the initial startup go to darktable settings > lua options and set your executable paths and other preferences, then restart darktable
 
 DRI = Dynamic Range Increase (Blend multiple bracket images into a single LDR file)
-DFF = Depth From Focus ("Focus Stacking" - Blend multiple images with different focus into a single image)
+DFF = Depth From Focus ('Focus Stacking' - Blend multiple images with different focus into a single image)
 Select multiple images that are either bracketed, or focus-shifted, set your desired operating parameters, and press the export button. A new image will be created. The image will
 be auto imported into darktable if you have that option enabled. Additional tags or style can be applied on auto import as well, if you desire.
 
@@ -44,8 +44,8 @@ See enfuse documentation for further explanation of how it specifically works an
 If you have a specific set of parameters you frequently like to use, you can save them to a preset. There are 3 presets available for DRI, and 3 for DFF.
 
 target file:
-Select your file destination path, or check the "save to source image location" option.
-Unless "Create unique filename" is selected, it will overwrite existing files
+Select your file destination path, or check the 'save to source image location' option.
+Unless 'Create unique filename' is selected, it will overwrite existing files
 Set any tags or style you desire to be added to the new image (only available if the auto-import option is enabled). You can also change the defaults for this under settings > lua options
 
 format options:
@@ -56,15 +56,22 @@ Same as other export modules
 
 ]]
 
-local dt = require "darktable"
-local df = require "lib/dtutils.file"
-local dsys = require "lib/dtutils.system"
-local du = require "lib/dtutils"
+local dt = require 'darktable'
+local df = require 'lib/dtutils.file'
+local dsys = require 'lib/dtutils.system'
+local du = require 'lib/dtutils'
 local mod = 'module_enfuseAdvanced'
 local os_path_seperator = '/'
 if dt.configuration.running_os == 'windows' then os_path_seperator = '\\' end
 
-du.check_min_api_version("5.0.0", "enfuseAdvanced") 
+du.check_min_api_version('5.0.0', 'enfuseAdvanced')
+
+-- Tell gettext where to find the .mo file translating messages for a particular domain
+local gettext = dt.gettext
+gettext.bindtextdomain('enfuseAdvanced',dt.configuration.config_dir..'/lua/locale/')
+local function _(msgid)
+    return gettext.dgettext('enfuseAdvanced', msgid)
+end
 
 -- INITS --
 local AIS = {
@@ -166,9 +173,9 @@ local GUI = {
 }
 
 local styles = dt.styles
-local styles_count = 1 -- "none" = 1
+local styles_count = 1 -- 'none' = 1
 for _,i in pairs(dt.styles) do
-    if type(i) == "userdata" then styles_count = styles_count + 1 end
+    if type(i) == 'userdata' then styles_count = styles_count + 1 end
 end
 
 -- FUNCTION --
@@ -192,10 +199,10 @@ local function GetFileName(full_path) -- Parses a full path (path/filename_ident
     EX:
     path_1, file_1, id_1, ext_1 = GetFileName(full_path_1)
     ]]
-    local path = string.match(full_path, ".*[\\/]")
-    local filename = string.gsub(string.match(full_path, "[%w-_]*%.") , "%." , "" ) 
-    local identifier = string.match(filename, "%d*$")
-    local extension = string.match(full_path, "%.%w*")
+    local path = string.match(full_path, '.*[\\/]')
+    local filename = string.gsub(string.match(full_path, '[%w-_]*%.') , '%.' , '' ) 
+    local identifier = string.match(filename, '%d*$')
+    local extension = string.match(full_path, '%.%w*')
     return path, filename, identifier, extension
 end
 
@@ -226,7 +233,7 @@ local function PreCall(prog_tbls) --looks to see if this is the first call, if s
     if not dt.preferences.read(mod, 'bin_exists', 'bool') then
         GUI.options_contain.active = 4
         GUI.show_options.sensitive = false
-        dt.print('please update your binary locations')
+        dt.print(_('please update your binary locations'))
     end
 end
 
@@ -238,7 +245,7 @@ local function ExeUpdate(prog_tbl) --updates executable paths and verifies them
         if not prog.bin then 
             prog.install_error = true
             dt.preferences.write(mod, 'bin_exists', 'bool', false)
-            dt.print('issue with '..prog.name..' executable')
+            dt.print(_('issue with ')..prog.name.._(' executable'))
         else
             prog.bin = CleanSpaces(prog.bin)
         end
@@ -247,9 +254,9 @@ local function ExeUpdate(prog_tbl) --updates executable paths and verifies them
     if dt.preferences.read(mod, 'bin_exists', 'bool') then
         GUI.options_contain.active = 2
         GUI.show_options.sensitive = true
-        dt.print('update successful')
+        dt.print(_('update successful'))
     else
-        dt.print('update unsuccessful, please try again')
+        dt.print(_('update unsuccessful, please try again'))
     end
 end
 
@@ -315,8 +322,8 @@ local function UpdateENFargs(image_table, prefix) --updates the Enfuse arguments
         images_to_blend = images_to_blend..df.sanitize_filename(temp_image)..' '
     end
     ENF.arg_string = ENF.arg_string..' --depth='..GUI.Target.depth.value..' '
-    if GUI.Target.format.value == "tif" then ENF.arg_string = ENF.arg_string..'--compression='..GUI.Target.compression_level_tif.value..' '
-    elseif GUI.Target.format.value == "jpg" then ENF.arg_string = ENF.arg_string..'--compression='..GUI.Target.compression_level_jpg.value..' '
+    if GUI.Target.format.value == 'tif' then ENF.arg_string = ENF.arg_string..'--compression='..GUI.Target.compression_level_tif.value..' '
+    elseif GUI.Target.format.value == 'jpg' then ENF.arg_string = ENF.arg_string..'--compression='..GUI.Target.compression_level_jpg.value..' '
     end
     if not GUI.Target.source_location.value then out_path = GUI.Target.output_directory.value end
     out_name = smallest_name..'-'..largest_id
@@ -341,7 +348,7 @@ local function UpdateActivePreference() --sliders & entry boxes do not have a cl
     dt.preferences.write(mod, 'active_add_tags', 'string', temp)
 end
 
-local function SaveToPreference(preset) --save the present values of enfuse GUI elements to the specified "preset"
+local function SaveToPreference(preset) --save the present values of enfuse GUI elements to the specified 'preset'
     UpdateActivePreference()
     for argument, arg_data in pairs(ENF.args) do
         local temp
@@ -355,10 +362,10 @@ local function SaveToPreference(preset) --save the present values of enfuse GUI
             dt.preferences.write(mod, preset..argument, arg_data.style, temp)
         end
     end
-    dt.print('saved to '..preset)
+    dt.print(_('saved to ')..preset)
 end
 
-local function LoadFromPreference(preset) --load values from the specified "preset" into the GUI elements
+local function LoadFromPreference(preset) --load values from the specified 'preset' into the GUI elements
     for argument, arg_data in pairs(ENF.args) do
     local temp
         if argument == 'contrast_window_size' or argument == 'contrast_edge_scale' or argument == 'contrast_min_curvature' then  --comboboxes must be handled specially via an index value
@@ -371,14 +378,14 @@ local function LoadFromPreference(preset) --load values from the specified "pres
             dt.preferences.write(mod, 'active_'..argument, arg_data.style, temp)
         end     
     end
-    dt.print('loaded from '..preset)
+    dt.print(_('loaded from ')..preset)
 end
 
 local function remove_temp_files(images_to_remove) --deletes all files specified by the input string
-    if dt.configuration.running_os == "windows" then
-        dt.control.execute("del "..images_to_remove)
+    if dt.configuration.running_os == 'windows' then
+        dt.control.execute('del '..images_to_remove)
     else
-        dt.control.execute("rm "..images_to_remove)
+        dt.control.execute('rm '..images_to_remove)
     end
 end
 
@@ -406,15 +413,15 @@ local function support_format(storage, format) --tells dt we only support TIFF e
 end
 
 local function show_status(storage, image, format, filename, number, total, high_quality, extra_data) --outputs message to user showing script export status
-    dt.print('export for image fusion '..tostring(math.floor(number)).." / "..tostring(math.floor(total)))
+    dt.print(_('export for image fusion ')..tostring(math.floor(number))..' / '..tostring(math.floor(total)))
 end
 
 local function main(storage, image_table, extra_data)
     if extra_data[1] == 1 then
-        dt.print('too few images selected, please select at least 2 images')
+        dt.print(_('too few images selected, please select at least 2 images'))
         return
     elseif extra_data[1] == 2 then
-        dt.print('installation error, please verify binary paths are proper')
+        dt.print(_('installation error, please verify binary paths are proper'))
         return
     end
     local images_to_remove = ''
@@ -431,8 +438,8 @@ local function main(storage, image_table, extra_data)
         job.valid = false
         if resp ~= 0 then
             remove_temp_files(images_to_remove)
-            dt.print_error(AIS.name..' failed')
-            dt.print(AIS.name..' failed')
+            dt.print_error(AIS.name.._(' failed'))
+            dt.print(AIS.name.._(' failed'))
             return
         end
     end
@@ -455,13 +462,13 @@ local function main(storage, image_table, extra_data)
         local resp = dsys.external_command(run_cmd)
         if resp ~= 0 then
             remove_temp_files(images_to_remove)
-            dt.print_error(ENF.name..' failed')
-            dt.print(ENF.name..' failed')
+            dt.print_error(ENF.name.._(' failed'))
+            dt.print(ENF.name.._(' failed'))
             return
         end
         
         --copy exif data from original file
-        run_cmd = EXF.bin.." -TagsFromFile "..df.sanitize_filename(source_raw.path..os_path_seperator..source_raw.filename).." -exif:all --subifd:all -overwrite_original "..df.sanitize_filename(final_image)
+        run_cmd = EXF.bin..' -TagsFromFile '..df.sanitize_filename(source_raw.path..os_path_seperator..source_raw.filename)..' -exif:all --subifd:all -overwrite_original '..df.sanitize_filename(final_image)
         resp = dsys.external_command(run_cmd)
         
         
@@ -495,12 +502,12 @@ end
 --GUI--
 stack_compression = dt.new_widget('stack'){}
 local label_AIS_options= dt.new_widget('section_label'){
-    label = 'image align options'
+    label = _('image align options')
 }
 GUI.align = dt.new_widget('check_button'){
-    label = 'align images',
+    label = _('align images'),
     value = dt.preferences.read(mod, 'active_align', 'bool'),
-    tooltip = 'automatically align images prior to enfuse',
+    tooltip = _('automatically align images prior to enfuse'),
     clicked_callback = function(self) 
         dt.preferences.write(mod, 'active_align', 'bool', self.value) 
         for _,widget in pairs(GUI.AIS) do
@@ -510,52 +517,52 @@ GUI.align = dt.new_widget('check_button'){
     reset_callback = function(self) self.value = true end
 }
 GUI.AIS.radial_distortion = dt.new_widget('check_button'){
-    label = 'optimize radial distortion',
+    label = _('optimize radial distortion'),
     value = dt.preferences.read(mod, 'active_radial_distortion', 'bool'),
-    tooltip = 'optimize radial distortion for all images, \nexcept for first',
+    tooltip = _('optimize radial distortion for all images, \nexcept for first'),
     clicked_callback = function(self) dt.preferences.write(mod, 'active_radial_distortion', 'bool', self.value) end,
     reset_callback = function(self) self.value = true end
 }
 GUI.AIS.optimize_field = dt.new_widget('check_button'){
-    label = 'optimize field of view', 
+    label = _('optimize field of view'), 
     value = dt.preferences.read(mod, 'active_optimize_field', 'bool'),
-    tooltip ='optimize field of view for all images, except for first. \nUseful for aligning focus stacks (DFF) with slightly \ndifferent magnification.',
+    tooltip = _('optimize field of view for all images, except for first. \nUseful for aligning focus stacks (DFF) with slightly \ndifferent magnification.'),
     clicked_callback = function(self) dt.preferences.write(mod, 'active_optimize_field', 'bool', self.value) end,
     reset_callback = function(self) self.value = true end
 }
 GUI.AIS.optimize_image_center = dt.new_widget('check_button'){
-    label = 'optimize image center shift', 
+    label = _('optimize image center shift'), 
     value = dt.preferences.read(mod, 'active_optimize_image_center', 'bool'),
-    tooltip ='optimize image center shift for all images, \nexcept for first.',
+    tooltip = _('optimize image center shift for all images, \nexcept for first.'),
     clicked_callback = function(self) dt.preferences.write(mod, 'active_optimize_image_center', 'bool', self.value) end,
     reset_callback = function(self) self.value = true end
 }
 GUI.AIS.auto_crop = dt.new_widget('check_button'){
-    label = 'auto crop', 
+    label = _('auto crop'), 
     value = dt.preferences.read(mod, 'active_auto_crop', 'bool'),
-    tooltip ='auto crop the image to the area covered by all images.',
+    tooltip = _('auto crop the image to the area covered by all images.'),
     clicked_callback = function(self) dt.preferences.write(mod, 'active_auto_crop', 'bool', self.value) end,
     reset_callback = function(self) self.value = true end
 }
 GUI.AIS.distortion = dt.new_widget('check_button'){
-    label = 'load distortion from lens database', 
+    label = _('load distortion from lens database'), 
     value = dt.preferences.read(mod, 'active_distortion', 'bool'),
-    tooltip ='try to load distortion information from lens database',
+    tooltip = _('try to load distortion information from lens database'),
     clicked_callback = function(self) dt.preferences.write(mod, 'active_distortion', 'bool', self.value) end,
     reset_callback = function(self) self.value = true end
 }
 GUI.AIS.gpu = dt.new_widget('check_button'){
-    label = 'use gpu', 
+    label = _('use gpu'), 
     value = dt.preferences.read(mod, 'active_gpu', 'bool'),
-    tooltip ='use gpu during alignment',
+    tooltip = _('use gpu during alignment'),
     clicked_callback = function(self) dt.preferences.write(mod, 'active_gpu', 'bool', self.value) end,
     reset_callback = function(self) self.value = true end
 }
 temp = dt.preferences.read(mod, 'active_grid_size_ind', 'integer')
 if not InRange(temp, 1, 9) then temp = 5 end 
 GUI.AIS.grid_size = dt.new_widget('combobox'){
-    label = 'image grid size', 
-    tooltip ='break image into a rectangular grid \nand attempt to find num control points in each section.\ndefault: (5x5)',
+    label = _('image grid size'), 
+    tooltip = _('break image into a rectangular grid \nand attempt to find num control points in each section.\ndefault: (5x5)'),
     selected = temp,
     '1','2','3','4','5','6','7','8','9',
     changed_callback = function(self)
@@ -571,8 +578,8 @@ GUI.AIS.grid_size = dt.new_widget('combobox'){
 temp = dt.preferences.read(mod, 'active_control_points_ind', 'integer')
 if not InRange(temp, 1, 9) then temp = 8 end 
 GUI.AIS.control_points = dt.new_widget('combobox'){
-    label = 'control points/grid', 
-    tooltip ='number of control points (per grid, see option -g) \nto create between adjacent images \ndefault: (8).',
+    label = _('control points/grid'), 
+    tooltip = _('number of control points (per grid, see option -g) \nto create between adjacent images \ndefault: (8).'),
     selected = temp,
     '1','2','3','4','5','6','7','8','9',             
     changed_callback = function(self)
@@ -588,8 +595,8 @@ GUI.AIS.control_points = dt.new_widget('combobox'){
 temp = dt.preferences.read(mod, 'active_control_points_remove_ind', 'integer')
 if not InRange(temp, 1, 9) then temp = 3 end 
 GUI.AIS.control_points_remove = dt.new_widget('combobox'){
-    label = 'remove control points with error', 
-    tooltip ='remove all control points with an error higher \nthan num pixels \ndefault: (3)',
+    label = _('remove control points with error'), 
+    tooltip = _('remove all control points with an error higher \nthan num pixels \ndefault: (3)'),
     selected = temp,
     '1','2','3','4','5','6','7','8','9',             
     changed_callback = function(self)
@@ -605,8 +612,8 @@ GUI.AIS.control_points_remove = dt.new_widget('combobox'){
 temp = dt.preferences.read(mod, 'active_correlation_ind', 'integer')
 if not InRange(temp, 1, 10) then temp = 9 end 
 GUI.AIS.correlation  = dt.new_widget('combobox'){
-    label = 'correlation threshold for control points', 
-    tooltip ='correlation threshold for identifying \ncontrol points \ndefault: (0.9).',
+    label = _('correlation threshold for control points'), 
+    tooltip = _('correlation threshold for identifying \ncontrol points \ndefault: (0.9).'),
     selected = temp,
     '0.1','0.2','0.3','0.4','0.5','0.6','0.7','0.8','0.9','1.0',     
     changed_callback = function(self)
@@ -620,13 +627,13 @@ GUI.AIS.correlation  = dt.new_widget('combobox'){
     end
 } 
 local label_ENF_options= dt.new_widget('section_label'){
-    label = 'image fusion options'
+    label = _('image fusion options')
 }
 temp = dt.preferences.read(mod, 'active_exposure_weight', 'float')
 if not InRange(temp, 0, 1) then temp = 1 end
 GUI.ENF.exposure_weight = dt.new_widget('slider'){
-    label = 'exposure weight',
-    tooltip = 'set the relative weight of the well-exposedness criterion \nas defined by the chosen exposure weight function. \nincreasing this weight relative to the others will\n make well-exposed pixels contribute more to\n the final output. \ndefault: (1.0)',
+    label = _('exposure weight'),
+    tooltip = _('set the relative weight of the well-exposedness criterion \nas defined by the chosen exposure weight function. \nincreasing this weight relative to the others will\n make well-exposed pixels contribute more to\n the final output. \ndefault: (1.0)'),
     hard_min = 0,
     hard_max = 1,
     value = temp,
@@ -637,8 +644,8 @@ GUI.ENF.exposure_weight = dt.new_widget('slider'){
 temp = dt.preferences.read(mod, 'active_saturation_weight', 'float')
 if not InRange(temp, 0, 1) then temp = .2 end
 GUI.ENF.saturation_weight = dt.new_widget('slider'){
-    label = 'saturation weight',
-    tooltip = 'set the relative weight of high-saturation pixels. \nincreasing this weight makes pixels with high \nsaturation contribute more to the final output. \ndefault: (0.2)',
+    label = _('saturation weight'),
+    tooltip = _('set the relative weight of high-saturation pixels. \nincreasing this weight makes pixels with high \nsaturation contribute more to the final output. \ndefault: (0.2)'),
     hard_min = 0,
     hard_max = 1,
     value = temp,
@@ -649,8 +656,8 @@ GUI.ENF.saturation_weight = dt.new_widget('slider'){
 temp = dt.preferences.read(mod, 'active_contrast_weight', 'float')
 if not InRange(temp, 0, 1) then temp = 0 end
 GUI.ENF.contrast_weight = dt.new_widget('slider'){
-    label = 'contrast weight',
-    tooltip = 'sets the relative weight of high local-contrast pixels. \ndefault: (0.0).',
+    label = _('contrast weight'),
+    tooltip = _('sets the relative weight of high local-contrast pixels. \ndefault: (0.0).'),
     hard_min = 0,
     hard_max = 1,
     value = temp,
@@ -661,8 +668,8 @@ GUI.ENF.contrast_weight = dt.new_widget('slider'){
 temp = dt.preferences.read(mod, 'active_exposure_optimum', 'float')
 if not InRange(temp, 0, 1) then temp = 0.5 end
 GUI.ENF.exposure_optimum = dt.new_widget('slider'){
-    label = 'exposure optimum',
-    tooltip = 'determine at what normalized exposure value\n the optimum exposure of the input images\n is. this is, set the position of the maximum\n of the exposure weight curve. use this \noption to fine-tune exposure weighting. \ndefault: (0.5)',
+    label = _('exposure optimum'),
+    tooltip = _('determine at what normalized exposure value\n the optimum exposure of the input images\n is. this is, set the position of the maximum\n of the exposure weight curve. use this \noption to fine-tune exposure weighting. \ndefault: (0.5)'),
     hard_min = 0,
     hard_max = 1,
     value = temp,
@@ -673,8 +680,8 @@ GUI.ENF.exposure_optimum = dt.new_widget('slider'){
 temp = dt.preferences.read(mod, 'active_exposure_width', 'float')
 if not InRange(temp, 0, 1) then temp = 0.2 end
 GUI.ENF.exposure_width = dt.new_widget('slider'){
-    label = 'exposure width',
-    tooltip = 'set the characteristic width (FWHM) of the exposure \nweight function. low numbers give less weight to \npixels that are far from the user-defined \noptimum and vice versa. use this option to \nfine-tune exposure weighting. \ndefault: (0.2)',
+    label = _('exposure width'),
+    tooltip = _('set the characteristic width (FWHM) of the exposure \nweight function. low numbers give less weight to \npixels that are far from the user-defined \noptimum and vice versa. use this option to \nfine-tune exposure weighting. \ndefault: (0.2)'),
     hard_min = 0,
     hard_max = 1,
     value = temp,
@@ -683,24 +690,24 @@ GUI.ENF.exposure_width = dt.new_widget('slider'){
     end
 }
 GUI.ENF.hard_masks = dt.new_widget('check_button'){
-    label = 'hard mask', 
+    label = _('hard mask'), 
     value = dt.preferences.read(mod, 'active_hard_masks', 'bool'),
-    tooltip ='force hard blend masks on the finest scale. this avoids \naveraging of fine details (only), at the expense \nof increasing the noise. this improves the \nsharpness of focus stacks considerably.\ndefault (soft mask)',   
+    tooltip = _('force hard blend masks on the finest scale. this avoids \naveraging of fine details (only), at the expense \nof increasing the noise. this improves the \nsharpness of focus stacks considerably.\ndefault (soft mask)'),   
     clicked_callback = function(self) dt.preferences.write(mod, 'active_hard_masks', 'bool', self.value) end,
     reset_callback = function(self) self.value = false end
 }
 GUI.ENF.save_masks = dt.new_widget('check_button'){
-    label = 'save masks', 
+    label = _('save masks'), 
     value = dt.preferences.read(mod, 'active_save_masks', 'bool'),
-    tooltip ='Save the generated weight masks to your home directory,\nenblend saves masks as 8 bit grayscale, \ni.e. single channel images. \nfor accuracy we recommend to choose a lossless format.',  
+    tooltip = _('Save the generated weight masks to your home directory,\nenblend saves masks as 8 bit grayscale, \ni.e. single channel images. \nfor accuracy we recommend to choose a lossless format.'),  
     clicked_callback = function(self) dt.preferences.write(mod, 'active_save_masks', 'bool', self.value) end,
     reset_callback = function(self) self.value = false end
 }
 temp = dt.preferences.read(mod, 'active_contrast_window_size_ind', 'integer')
 if not InRange(temp, 1, 8) then temp = 3 end 
 GUI.ENF.contrast_window_size = dt.new_widget('combobox'){
-    label = 'contrast window size', 
-    tooltip ='set the window size for local contrast analysis. \nthe window will be a square of size × size pixels. \nif given an even size, Enfuse will \nautomatically use the next odd number.\nfor contrast analysis size values larger \nthan 5 pixels might result in a \nblurry composite image. values of 3 and \n5 pixels have given good results on \nfocus stacks. \ndefault: (5) pixels',
+    label = _('contrast window size'), 
+    tooltip = _('set the window size for local contrast analysis. \nthe window will be a square of size × size pixels. \nif given an even size, Enfuse will \nautomatically use the next odd number.\nfor contrast analysis size values larger \nthan 5 pixels might result in a \nblurry composite image. values of 3 and \n5 pixels have given good results on \nfocus stacks. \ndefault: (5) pixels'),
     selected = temp,
     '3','4','5','6','7','8','9','10',
     changed_callback = function(self)
@@ -716,8 +723,8 @@ GUI.ENF.contrast_window_size = dt.new_widget('combobox'){
 temp = dt.preferences.read(mod, 'active_contrast_edge_scale_ind', 'integer')
 if not InRange(temp, 1, 6) then temp = 1 end 
 GUI.ENF.contrast_edge_scale = dt.new_widget('combobox'){
-    label = 'contrast edge scale', 
-    tooltip ='a non-zero value for EDGE-SCALE switches on the \nLaplacian-of-Gaussian (LoG) edge detection algorithm.\n edage-scale is the radius of the Gaussian used \nin the search for edges. a positive LCE-SCALE \nturns on local contrast enhancement (LCE) \nbefore the LoG edge detection. \nDefault: (0.0) pixels.',
+    label = _('contrast edge scale'), 
+    tooltip = _('a non-zero value for EDGE-SCALE switches on the \nLaplacian-of-Gaussian (LoG) edge detection algorithm.\n edage-scale is the radius of the Gaussian used \nin the search for edges. a positive LCE-SCALE \nturns on local contrast enhancement (LCE) \nbefore the LoG edge detection. \nDefault: (0.0) pixels.'),
     selected = temp,
     '0.0','0.1','0.2','0.3','0.4','0.5',
     changed_callback = function(self)
@@ -733,8 +740,8 @@ GUI.ENF.contrast_edge_scale = dt.new_widget('combobox'){
 temp = dt.preferences.read(mod, 'active_contrast_min_curvature_ind', 'integer')
 if not InRange(temp, 1, 11) then temp = 1 end 
 GUI.ENF.contrast_min_curvature = dt.new_widget('combobox'){
-    label = 'contrast min curvature [%]',
-    tooltip ='define the minimum curvature for the LoG edge detection. Append a ‘%’ to specify the minimum curvature relative to maximum pixel value in the source image. Default: (0.0%)',
+    label = _('contrast min curvature [%]'),
+    tooltip = _('define the minimum curvature for the LoG edge detection. Append a ‘%’ to specify the minimum curvature relative to maximum pixel value in the source image. Default: (0.0%)'),
     selected = temp, 
     '0.0%','0.1%','0.2%','0.3%','0.4%','0.5%','0.6%','0.7%','0.8%','0.9%','1.0%',
     changed_callback = function(self)
@@ -748,13 +755,13 @@ GUI.ENF.contrast_min_curvature = dt.new_widget('combobox'){
     end
 } 
 local label_target_options= dt.new_widget('section_label'){
-    label = 'target file'
+    label = _('target file')
 }
 temp = dt.preferences.read(mod, 'active_compression_level_tif_ind', 'integer')
 if not InRange(temp, 1, 4) then temp = 1 end 
 GUI.Target.compression_level_tif = dt.new_widget('combobox'){
-    label = 'tiff compression', 
-    tooltip = 'compression method for tiff files',
+    label = _('tiff compression'), 
+    tooltip = _('compression method for tiff files'),
     selected = temp,
     'none','deflate','lzw','packbits',
     changed_callback = function(self)
@@ -770,8 +777,8 @@ GUI.Target.compression_level_tif = dt.new_widget('combobox'){
 temp = dt.preferences.read(mod, 'active_compression_level_jpg', 'integer')
 if not InRange(temp, 0, 100) then temp = 0 end
 GUI.Target.compression_level_jpg = dt.new_widget('slider'){
-    label = 'jpeg compression',
-    tooltip = 'jpeg compression level',
+    label = _('jpeg compression'),
+    tooltip = _('jpeg compression level'),
     soft_min = 0,
     soft_max = 100,
     hard_min = 0,
@@ -793,8 +800,8 @@ stack_compression = dt.new_widget('stack'){
 temp = dt.preferences.read(mod, 'active_format_ind', 'integer')
 if not InRange(temp, 1, 6) then temp = 1 end 
 GUI.Target.format = dt.new_widget('combobox'){
-    label = 'file format', 
-    tooltip = 'file format of the enfused final image',
+    label = _('file format'), 
+    tooltip = _('file format of the enfused final image'),
     selected = temp,
     'tif','jpg','png','pnm','pbm','ppm',
     changed_callback = function(self)
@@ -814,8 +821,8 @@ GUI.Target.format = dt.new_widget('combobox'){
 temp = dt.preferences.read(mod, 'active_depth_ind', 'integer')
 if not InRange(temp, 1, 5) then temp = 3 end 
 GUI.Target.depth = dt.new_widget('combobox'){
-    label = 'bit depth', 
-    tooltip = 'bit depth of the enfused file',
+    label = _('bit depth'), 
+    tooltip = _('bit depth of the enfused file'),
     selected = temp,
     '8','16','32','r32','r64',
     changed_callback = function(self)
@@ -828,31 +835,31 @@ GUI.Target.depth = dt.new_widget('combobox'){
         dt.preferences.write(mod, 'active_depth_ind', 'integer', self.selected)
     end 
 }
-local label_directory = dt.new_widget("label"){
-    label = 'directory',
-    ellipsize = "start",
-    halign = "start"
+local label_directory = dt.new_widget('label'){
+    label = _('directory'),
+    ellipsize = 'start',
+    halign = 'start'
 }
 temp = dt.preferences.read(mod, 'active_output_directory', 'string')
 if temp == '' or temp == nil then temp = dt.collection[1].path end
-GUI.Target.output_directory = dt.new_widget("file_chooser_button"){
+GUI.Target.output_directory = dt.new_widget('file_chooser_button'){
     title = 'Select export path', 
     is_directory = true,
-    tooltip ='select the target directory for the fused image. \nthe filename is created automatically.',
+    tooltip = _('select the target directory for the fused image. \nthe filename is created automatically.'),
     value = temp,
     changed_callback = function(self) dt.preferences.write(mod, 'active_output_directory', 'string', self.value) end
 }
 GUI.Target.source_location = dt.new_widget('check_button'){
-    label = 'save to source image location', 
+    label = _('save to source image location'), 
     value = dt.preferences.read(mod, 'active_source_location', 'bool'),
-    tooltip ='If checked ignores the location above and saves output image(s) to the same location as the source images.',  
+    tooltip = _('If checked ignores the location above and saves output image(s) to the same location as the source images.'),  
     clicked_callback = function(self) dt.preferences.write(mod, 'active_source_location', 'bool', self.value) end,
     reset_callback = function(self) self.value = true end
 }
 temp = dt.preferences.read(mod, 'active_on_conflict_ind', 'integer')
 if not InRange(temp, 1, 2) then temp = 1 end 
 GUI.Target.on_conflict = dt.new_widget('combobox'){
-    label = 'on conflict', 
+    label = _('on conflict'), 
     selected = temp,  
     'create unique filename','overwrite',           
     changed_callback = function(self)
@@ -866,9 +873,9 @@ GUI.Target.on_conflict = dt.new_widget('combobox'){
     end 
 }  
 GUI.Target.auto_import = dt.new_widget('check_button'){
-    label = 'auto import', 
+    label = _('auto import'), 
     value = dt.preferences.read(mod, 'active_auto_import', 'bool'),
-    tooltip ='import the image into darktable database when enfuse completes',  
+    tooltip = _('import the image into darktable database when enfuse completes'),  
     clicked_callback = function(self)
         dt.preferences.write(mod, 'active_auto_import', 'bool', self.value)
         GUI.Target.apply_style.sensitive = self.value
@@ -879,10 +886,10 @@ GUI.Target.auto_import = dt.new_widget('check_button'){
 }
 temp = dt.preferences.read(mod, 'active_apply_style_ind', 'integer')
 GUI.Target.apply_style = dt.new_widget('combobox'){
-    label = "Apply Style on Import",
-    tooltip = "Apply selected style on auto-import to newly created blended image",
+    label = _('Apply Style on Import'),
+    tooltip = _('Apply selected style on auto-import to newly created blended image'),
     selected = 1,
-    "none",
+    'none',
     changed_callback = function(self)
         dt.preferences.write(mod, 'active_apply_style', 'string', self.value) 
         dt.preferences.write(mod, 'active_apply_style_ind', 'integer', self.selected)
@@ -899,25 +906,25 @@ end
 if not InRange(temp, 1, styles_count) then temp = 1 end
 GUI.Target.apply_style.selected = temp
 GUI.Target.copy_tags = dt.new_widget('check_button'){
-    label = 'copy tags', 
+    label = _('copy tags'), 
     value = dt.preferences.read(mod, 'active_copy_tags', 'bool'),
-    tooltip ='Copy tags from first image.', 
+    tooltip = _('Copy tags from first image.'), 
     clicked_callback = function(self) dt.preferences.write(mod, 'active_copy_tags', 'bool', self.value) end,
     reset_callback = function(self) self.value = true end
 }
 temp = dt.preferences.read(mod, 'active_add_tags', 'string')
 if temp == '' then temp = nil end 
-GUI.Target.add_tags = dt.new_widget("entry"){
-    tooltip = "Additional tags to be added on import. Seperate with commas, all spaces will be removed",
+GUI.Target.add_tags = dt.new_widget('entry'){
+    tooltip = _('Additional tags to be added on import. Seperate with commas, all spaces will be removed'),
     text = temp,
-    placeholder = "Enter tags, seperated by commas",
+    placeholder = 'Enter tags, seperated by commas',
     editable = true
 }
 temp = dt.preferences.read(mod, 'active_current_preset_ind', 'integer')
 if not InRange(temp, 1, 6) then temp = 1 end
 GUI.Presets.current_preset = dt.new_widget('combobox'){
-    label = "active preset",
-    tooltip = "preset to be loaded from or saved to",
+    label = _('active preset'),
+    tooltip = _('preset to be loaded from or saved to'),
     value = temp,
     'dri_1', 'dri_2', 'dri_3', 'dff_1', 'dff_2', 'dff_3',
     changed_callback = function(self)
@@ -930,20 +937,20 @@ GUI.Presets.current_preset = dt.new_widget('combobox'){
         dt.preferences.write(mod, 'active_current_preset_ind', 'integer', self.selected)
     end 
 }
-GUI.Presets.load = dt.new_widget("button"){
-    label = 'laod fusion preset',
-    tooltip ='load current fusion parameters from selected preset',
+GUI.Presets.load = dt.new_widget('button'){
+    label = _('laod fusion preset'),
+    tooltip = _('load current fusion parameters from selected preset'),
     clicked_callback = function() LoadFromPreference(GUI.Presets.current_preset.value) end
 }
-GUI.Presets.save = dt.new_widget("button"){
-    label = 'save to fusion preset',
-    tooltip ='save current fusion parameters to selected preset',
+GUI.Presets.save = dt.new_widget('button'){
+    label = _('save to fusion preset'),
+    tooltip = _('save current fusion parameters to selected preset'),
     clicked_callback = function() SaveToPreference(GUI.Presets.current_preset.value) end
 }
 GUI.Presets.variants = dt.new_widget('check_button'){
-    label = 'create image variants from presets', 
+    label = _('create image variants from presets'), 
     value = dt.preferences.read(mod, 'active_variants', 'bool'),
-    tooltip ='create multiple image variants based on the three different presets of the specified type',   
+    tooltip = _('create multiple image variants based on the three different presets of the specified type'),   
     clicked_callback = function(self) 
         dt.preferences.write(mod, 'active_variants', 'bool', self.value)
         if self.value then
@@ -960,8 +967,8 @@ GUI.Presets.variants = dt.new_widget('check_button'){
 temp = dt.preferences.read(mod, 'active_variants_type_ind', 'integer')
 if not InRange(temp, 1, 2) then temp = 1 end
 GUI.Presets.variants_type = dt.new_widget('combobox'){
-    label = "create variants type",
-    tooltip = "preset type to be used when creating image variants",
+    label = _('create variants type'),
+    tooltip = _('preset type to be used when creating image variants'),
     selected = temp,
     'dri', 'dff',
     changed_callback = function(self)
@@ -1000,8 +1007,8 @@ GUI.exes.exiftool = dt.new_widget('file_chooser_button'){
     changed_callback = function(self) self.tooltip = self.value end
 } 
 GUI.exes.update = dt.new_widget('button'){
-    label = 'update',
-    tooltip ='update the binary paths with current values',
+    label = _('update'),
+    tooltip = _('update the binary paths with current values'),
     clicked_callback = function() ExeUpdate({AIS,ENF,EXF}) end
 }
 temp = GUI.Target.format.value
@@ -1077,11 +1084,12 @@ GUI.options_contain = dt.new_widget('stack'){
     box_AIS,
     box_ENF,
     box_Target,
-    box_exes
+    box_exes,
+    active = 2
 }
 GUI.show_options = dt.new_widget('combobox'){
-    label = "show options",
-    tooltip = "show options for specified aspect of output",
+    label = _('show options'),
+    tooltip = _('show options for specified aspect of output'),
     selected = 2,
     'align image stack', 'enfuse/enblend', 'target file',
     changed_callback = function(self)
@@ -1093,6 +1101,23 @@ GUI.show_options = dt.new_widget('combobox'){
         dt.preferences.write(mod, 'active_current_preset_ind', 'integer', self.selected)
     end 
 }
+local storage_widget = dt.new_widget('box') {
+    orientation = 'vertical',
+    GUI.show_options,
+    GUI.options_contain
+} 
+
+-- Register new storage --
+dt.register_storage(
+    'module_enfuseAdvanced', --Module name
+    _('DRI or DFF image'), --Name
+    show_status, --store: called once per exported image
+    main, --finalize: called once when all images have finished exporting
+    support_format, --supported
+    initial, --initialize
+    storage_widget
+)
+
 if dt.preferences.read(mod, 'bin_exists', 'bool') then 
     GUI.options_contain.active = 2
     GUI.show_options.sensitive = true
@@ -1100,20 +1125,3 @@ else
     GUI.options_contain.active = 4
     GUI.show_options.sensitive = false
 end
-local storage_widget = dt.new_widget("box") {
-    orientation = "vertical",
-    GUI.show_options,
-    GUI.options_contain
-}
-    
-
--- Register new storage --
-dt.register_storage(
-    "module_enfuseAdvanced", --Module name
-    'DRI or DFF image', --Name
-    show_status, --store: called once per exported image
-    main, --finalize: called once when all images have finished exporting
-    support_format, --supported
-    initial, --initialize
-    storage_widget
-    )

From f82ae6c09103d39446d640764ef1f4e8a7fbb125 Mon Sep 17 00:00:00 2001
From: BzKevin <36381472+BzKevin@users.noreply.github.com>
Date: Mon, 6 May 2019 21:35:41 -0400
Subject: [PATCH 6/6] Change 'Create Unique Filename' to default

---
 contrib/enfuseAdvanced.lua | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/contrib/enfuseAdvanced.lua b/contrib/enfuseAdvanced.lua
index 0557bb0..9fb49c0 100644
--- a/contrib/enfuseAdvanced.lua
+++ b/contrib/enfuseAdvanced.lua
@@ -45,7 +45,7 @@ If you have a specific set of parameters you frequently like to use, you can sav
 
 target file:
 Select your file destination path, or check the 'save to source image location' option.
-Unless 'Create unique filename' is selected, it will overwrite existing files
+'Create Unique Filename' is enabled by default at startup, the user can choose to overwrite existing
 Set any tags or style you desire to be added to the new image (only available if the auto-import option is enabled). You can also change the defaults for this under settings > lua options
 
 format options:
@@ -860,7 +860,7 @@ temp = dt.preferences.read(mod, 'active_on_conflict_ind', 'integer')
 if not InRange(temp, 1, 2) then temp = 1 end 
 GUI.Target.on_conflict = dt.new_widget('combobox'){
     label = _('on conflict'), 
-    selected = temp,  
+    selected = 1,  
     'create unique filename','overwrite',           
     changed_callback = function(self)
         dt.preferences.write(mod, 'active_on_conflict', 'string', self.value)