[gnome-photos/wip/uajain/shadows_highlights: 1/3] shadows and highlights: Add basic UI structure

[Umang Jain <uajain src gnome org>]

commit 59bdf90d0624f74cede06a35ec795ea1a3c5bd44
Author: Umang Jain <mailumangjain gmail com>
Date:   Sat Oct 7 13:37:12 2017 +0530

    shadows and highlights: Add basic UI structure

 src/photos-tool-colors.c |   79 ++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 79 insertions(+), 0 deletions(-)
---
diff --git a/src/photos-tool-colors.c b/src/photos-tool-colors.c
index d2b37f7..7bdd447 100644
--- a/src/photos-tool-colors.c
+++ b/src/photos-tool-colors.c
@@ -45,7 +45,9 @@ struct _PhotosToolColors
   GtkWidget *contrast_scale;
   GtkWidget *exposure_scale;
   GtkWidget *grid;
+  GtkWidget *highlights_scale;
   GtkWidget *saturation_scale;
+  GtkWidget *shadows_scale;
   guint blacks_exposure_value_changed_id;
   guint brightness_contrast_value_changed_id;
   guint saturation_value_changed_id;
@@ -76,10 +78,18 @@ static const gdouble EXPOSURE_DEFAULT = 0.0;
 static const gdouble EXPOSURE_MAXIMUM = 3.0;
 static const gdouble EXPOSURE_MINIMUM = -3.0;
 static const gdouble EXPOSURE_STEP = 0.3;
+static const gdouble HIGHLIGHTS_DEFAULT = 1.0;
+static const gdouble HIGHLIGHTS_MAXIMUM = 2.0;
+static const gdouble HIGHLIGHTS_MINIMUM = 0.0;
+static const gdouble HIGHLIGHTS_STEP = 0.1;
 static const gdouble SATURATION_DEFAULT = 1.0;
 static const gdouble SATURATION_MAXIMUM = 2.0;
 static const gdouble SATURATION_MINIMUM = 0.0;
 static const gdouble SATURATION_STEP = 0.1;
+static const gdouble SHADOWS_DEFAULT = 1.0;
+static const gdouble SHADOWS_MAXIMUM = 2.0;
+static const gdouble SHADOWS_MINIMUM = 0.0;
+static const gdouble SHADOWS_STEP = 0.1;
 
 
 static gboolean
@@ -186,6 +196,16 @@ photos_tool_colors_saturation_value_changed (PhotosToolColors *self)
 
 
 static void
+photos_tool_colors_highlights_value_changed (PhotosToolColors *self)
+{}
+
+
+static void
+photos_tool_colors_shadows_value_changed (PhotosToolColors *self)
+{}
+
+
+static void
 photos_tool_colors_activate (PhotosTool *tool, PhotosBaseItem *item, PhotosImageView *view)
 {
   PhotosToolColors *self = PHOTOS_TOOL_COLORS (tool);
@@ -194,7 +214,9 @@ photos_tool_colors_activate (PhotosTool *tool, PhotosBaseItem *item, PhotosImage
   gdouble contrast;
   gdouble contrast_real;
   gdouble exposure;
+  gdouble highlights;
   gdouble saturation;
+  gdouble shadows;
 
   if (photos_base_item_operation_get (item,
                                       "gegl:brightness-contrast",
@@ -219,11 +241,23 @@ photos_tool_colors_activate (PhotosTool *tool, PhotosBaseItem *item, PhotosImage
   if (!photos_base_item_operation_get (item, "photos:saturation", "scale", &saturation, NULL))
     saturation = SATURATION_DEFAULT;
 
+  if (!photos_base_item_operation_get (item,
+                                       "gegl:shadows-highlights",
+                                       "shadows", &shadows,
+                                       "highlights", &highlights,
+                                       NULL))
+    {
+      shadows = SHADOWS_DEFAULT;
+      highlights = HIGHLIGHTS_DEFAULT;
+    }
+
   blacks = CLAMP (blacks, BLACKS_MINIMUM, BLACKS_MAXIMUM);
   brightness = CLAMP (brightness, BRIGHTNESS_MINIMUM, BRIGHTNESS_MAXIMUM);
   contrast = CLAMP (contrast, CONTRAST_MINIMUM, CONTRAST_MAXIMUM);
   exposure = CLAMP (exposure, EXPOSURE_MINIMUM, EXPOSURE_MAXIMUM);
+  highlights = CLAMP (highlights, HIGHLIGHTS_MINIMUM, HIGHLIGHTS_MAXIMUM);
   saturation = CLAMP (saturation, SATURATION_MINIMUM, SATURATION_MAXIMUM);
+  shadows = CLAMP (shadows, SHADOWS_MINIMUM, SHADOWS_MAXIMUM);
 
   g_signal_handlers_block_by_func (self->blacks_scale, photos_tool_colors_blacks_exposure_value_changed, 
self);
   g_signal_handlers_block_by_func (self->brightness_scale,
@@ -233,12 +267,16 @@ photos_tool_colors_activate (PhotosTool *tool, PhotosBaseItem *item, PhotosImage
                                    photos_tool_colors_brightness_contrast_value_changed,
                                    self);
   g_signal_handlers_block_by_func (self->exposure_scale, photos_tool_colors_blacks_exposure_value_changed, 
self);
+  g_signal_handlers_block_by_func (self->highlights_scale, photos_tool_colors_highlights_value_changed, 
self);
   g_signal_handlers_block_by_func (self->saturation_scale, photos_tool_colors_saturation_value_changed, 
self);
+  g_signal_handlers_block_by_func (self->shadows_scale, photos_tool_colors_shadows_value_changed, self);
   gtk_range_set_value (GTK_RANGE (self->blacks_scale), blacks);
   gtk_range_set_value (GTK_RANGE (self->brightness_scale), brightness);
   gtk_range_set_value (GTK_RANGE (self->contrast_scale), contrast);
   gtk_range_set_value (GTK_RANGE (self->exposure_scale), exposure);
+  gtk_range_set_value (GTK_RANGE (self->highlights_scale), highlights);
   gtk_range_set_value (GTK_RANGE (self->saturation_scale), saturation);
+  gtk_range_set_value (GTK_RANGE (self->shadows_scale), shadows);
   g_signal_handlers_unblock_by_func (self->blacks_scale, photos_tool_colors_blacks_exposure_value_changed, 
self);
   g_signal_handlers_unblock_by_func (self->brightness_scale,
                                      photos_tool_colors_brightness_contrast_value_changed,
@@ -247,7 +285,9 @@ photos_tool_colors_activate (PhotosTool *tool, PhotosBaseItem *item, PhotosImage
                                      photos_tool_colors_brightness_contrast_value_changed,
                                      self);
   g_signal_handlers_unblock_by_func (self->exposure_scale, photos_tool_colors_blacks_exposure_value_changed, 
self);
+  g_signal_handlers_unblock_by_func (self->highlights_scale, photos_tool_colors_highlights_value_changed, 
self);
   g_signal_handlers_unblock_by_func (self->saturation_scale, photos_tool_colors_saturation_value_changed, 
self);
+  g_signal_handlers_unblock_by_func (self->shadows_scale, photos_tool_colors_shadows_value_changed, self);
 
   g_signal_emit_by_name (self, "activated");
 }
@@ -413,6 +453,45 @@ photos_tool_colors_init (PhotosToolColors *self)
                             "value-changed",
                             G_CALLBACK (photos_tool_colors_saturation_value_changed),
                             self);
+
+  label = gtk_label_new (_("Shadows"));
+  gtk_widget_set_halign (label, GTK_ALIGN_START);
+  context = gtk_widget_get_style_context (label);
+  gtk_style_context_add_class (context, "dim-label");
+  gtk_container_add (GTK_CONTAINER (box), label);
+
+  self->shadows_scale = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
+                                                  SHADOWS_MINIMUM,
+                                                  SHADOWS_MAXIMUM,
+                                                  SHADOWS_STEP);
+  gtk_widget_set_hexpand (self->shadows_scale, TRUE);
+  gtk_scale_add_mark (GTK_SCALE (self->shadows_scale), SHADOWS_DEFAULT, GTK_POS_BOTTOM, NULL);
+  gtk_scale_set_draw_value (GTK_SCALE (self->shadows_scale), FALSE);
+  gtk_container_add (GTK_CONTAINER (box), self->shadows_scale);
+  g_signal_connect_swapped (self->shadows_scale,
+                            "value-changed",
+                            G_CALLBACK (photos_tool_colors_shadows_value_changed),
+                            self);
+
+  label = gtk_label_new (_("Highlights"));
+  gtk_widget_set_halign (label, GTK_ALIGN_START);
+  context = gtk_widget_get_style_context (label);
+  gtk_style_context_add_class (context, "dim-label");
+  gtk_container_add (GTK_CONTAINER (box), label);
+
+  self->highlights_scale = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
+                                                     HIGHLIGHTS_MINIMUM,
+                                                     HIGHLIGHTS_MAXIMUM,
+                                                     HIGHLIGHTS_STEP);
+  gtk_widget_set_hexpand (self->highlights_scale, TRUE);
+  gtk_scale_add_mark (GTK_SCALE (self->highlights_scale), SHADOWS_DEFAULT, GTK_POS_BOTTOM, NULL);
+  gtk_scale_set_draw_value (GTK_SCALE (self->highlights_scale), FALSE);
+  gtk_container_add (GTK_CONTAINER (box), self->highlights_scale);
+  g_signal_connect_swapped (self->highlights_scale,
+                            "value-changed",
+                            G_CALLBACK (photos_tool_colors_highlights_value_changed),
+                            self);
+
 }