[gimp] app: enable gegl:color-to-alpha custom GUI

[N/A <ell src gnome org>]

commit 4190f400b01c9a2e3a09ffad3c3708b140300d92
Author: Ell <ell_se yahoo com>
Date:   Thu Feb 15 08:55:33 2018 -0500

    app: enable gegl:color-to-alpha custom GUI
    
    gegl:color-to-alpha-plus was merged back to gegl:color-to-alpha in
    GEGL, so we can change the custom propgui constructor to refer to
    gegl:color-to-alpha.
    
    Remove the threshold-range compression toggle and logic, since the
    corresponding property was removed in GEGL.

 app/propgui/gimppropgui-color-to-alpha.c |   85 +----------------------------
 app/propgui/gimppropgui.c                |    2 +-
 2 files changed, 4 insertions(+), 83 deletions(-)
---
diff --git a/app/propgui/gimppropgui-color-to-alpha.c b/app/propgui/gimppropgui-color-to-alpha.c
index ae022d3..f671812 100644
--- a/app/propgui/gimppropgui-color-to-alpha.c
+++ b/app/propgui/gimppropgui-color-to-alpha.c
@@ -37,39 +37,6 @@
 #include "gimp-intl.h"
 
 
-static gdouble
-get_max_color_extent (GObject *config)
-{
-  GimpRGB *color;
-  gdouble  max_extent = 0.0;
-
-  g_object_get (config,
-                "color", &color,
-                NULL);
-
-  max_extent = MAX (max_extent, MAX (color->r, 1.0 - color->r));
-  max_extent = MAX (max_extent, MAX (color->g, 1.0 - color->g));
-  max_extent = MAX (max_extent, MAX (color->b, 1.0 - color->b));
-
-  g_free (color);
-
-  return max_extent;
-}
-
-static gdouble
-compress_threshold (GObject *config,
-                    gdouble  threshold)
-{
-  return MIN (threshold / get_max_color_extent (config), 1.0);
-}
-
-static gdouble
-uncompress_threshold (GObject *config,
-                      gdouble  threshold)
-{
-  return threshold * get_max_color_extent (config);
-}
-
 static void
 threshold_picked (GObject       *config,
                   gpointer       identifier,
@@ -78,22 +45,17 @@ threshold_picked (GObject       *config,
                   const Babl    *sample_format,
                   const GimpRGB *picked_color)
 {
-  GimpRGB  *color;
-  gboolean  compress_threshold_range;
-  gdouble   threshold = 0.0;
+  GimpRGB *color;
+  gdouble  threshold = 0.0;
 
   g_object_get (config,
-                "color",                    &color,
-                "compress-threshold-range", &compress_threshold_range,
+                "color", &color,
                 NULL);
 
   threshold = MAX (threshold, fabs (picked_color->r - color->r));
   threshold = MAX (threshold, fabs (picked_color->g - color->g));
   threshold = MAX (threshold, fabs (picked_color->b - color->b));
 
-  if (compress_threshold_range)
-    threshold = compress_threshold (config, threshold);
-
   g_object_set (config,
                 identifier, threshold,
                 NULL);
@@ -101,37 +63,6 @@ threshold_picked (GObject       *config,
   g_free (color);
 }
 
-static void
-compress_threshold_range_clicked (GtkWidget *toggle,
-                                  GObject   *config)
-{
-  gdouble  transparency_threshold;
-  gdouble  opacity_threshold;
-  gboolean compress_threshold_range;
-
-  g_object_get (config,
-                "transparency-threshold",   &transparency_threshold,
-                "opacity-threshold",        &opacity_threshold,
-                "compress-threshold-range", &compress_threshold_range,
-                NULL);
-
-  if (compress_threshold_range)
-    {
-      transparency_threshold = compress_threshold (config, transparency_threshold);
-      opacity_threshold      = compress_threshold (config, opacity_threshold);
-    }
-  else
-    {
-      transparency_threshold = uncompress_threshold (config, transparency_threshold);
-      opacity_threshold      = uncompress_threshold (config, opacity_threshold);
-    }
-
-  g_object_set (config,
-                "transparency-threshold", transparency_threshold,
-                "opacity-threshold",      opacity_threshold,
-                NULL);
-}
-
 GtkWidget *
 _gimp_prop_gui_new_color_to_alpha (GObject                  *config,
                                    GParamSpec              **param_specs,
@@ -146,7 +77,6 @@ _gimp_prop_gui_new_color_to_alpha (GObject                  *config,
   GtkWidget   *button;
   GtkWidget   *hbox;
   GtkWidget   *scale;
-  GtkWidget   *toggle;
   const gchar *label;
 
   g_return_val_if_fail (G_IS_OBJECT (config), NULL);
@@ -206,14 +136,5 @@ _gimp_prop_gui_new_color_to_alpha (GObject                  *config,
       gtk_widget_show (button);
     }
 
-  toggle = gimp_prop_widget_new (config, "compress-threshold-range",
-                                 area, context, NULL, NULL, NULL, &label);
-  gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
-  gtk_widget_show (toggle);
-
-  g_signal_connect (toggle, "clicked",
-                    G_CALLBACK (compress_threshold_range_clicked),
-                    config);
-
   return vbox;
 }
diff --git a/app/propgui/gimppropgui.c b/app/propgui/gimppropgui.c
index c274483..a63eee0 100644
--- a/app/propgui/gimppropgui.c
+++ b/app/propgui/gimppropgui.c
@@ -442,7 +442,7 @@ gui_new_funcs[] =
     _gimp_prop_gui_new_hue_saturation },
   { "GimpGegl-gegl-color-rotate-config",
     _gimp_prop_gui_new_color_rotate },
-  { "GimpGegl-gegl-color-to-alpha-plus-config",
+  { "GimpGegl-gegl-color-to-alpha-config",
     _gimp_prop_gui_new_color_to_alpha },
   { "GimpGegl-gegl-convolution-matrix-config",
     _gimp_prop_gui_new_convolution_matrix },