1 files changed, 12 insertions, 45 deletions

diff --git a/src/dialogs/Preferences.vala b/src/dialogs/Preferences.vala
index 0a18547..17b16cf 100644
--- a/src/dialogs/Preferences.vala
+++ b/src/dialogs/Preferences.vala
@@ -19,9 +19,8 @@ public class PreferencesDialog : Gtk.Dialog {
     private static PreferencesDialog preferences_dialog;
 
     [GtkChild]
-    private Gtk.Adjustment bg_color_adjustment;
-    [GtkChild]
-    private Gtk.Scale bg_color_slider;
+    private Gtk.Switch switch_dark;
+
     [GtkChild]
     private Gtk.ComboBox photo_editor_combo;
     [GtkChild]
@@ -72,12 +71,6 @@ public class PreferencesDialog : Gtk.Dialog {
         delete_event.connect(on_delete);
         response.connect(on_close);
 
-        bg_color_adjustment.set_value(bg_color_adjustment.get_upper() -
-            (Config.Facade.get_instance().get_bg_color().red * 65535.0));
-        bg_color_adjustment.value_changed.connect(on_value_changed);
-
-        bg_color_slider.button_press_event.connect(on_bg_color_reset);
-
         transparent_checker_radio.toggled.connect(on_radio_changed);
         transparent_solid_radio.toggled.connect(on_radio_changed);
         transparent_none_radio.toggled.connect(on_radio_changed);
@@ -148,6 +141,8 @@ public class PreferencesDialog : Gtk.Dialog {
         default_raw_developer_combo.append_text(RawDeveloper.SHOTWELL.get_label());
         set_raw_developer_combo(Config.Facade.get_instance().get_default_raw_developer());
         default_raw_developer_combo.changed.connect(on_default_raw_developer_changed);
+        switch_dark.active = Gtk.Settings.get_default().gtk_application_prefer_dark_theme;
+        switch_dark.notify["active"].connect(on_theme_variant_changed);
     }
 
     public void populate_preference_options() {
@@ -162,6 +157,13 @@ public class PreferencesDialog : Gtk.Dialog {
         lowercase.set_active(Config.Facade.get_instance().get_use_lowercase_filenames());
     }
 
+    private void on_theme_variant_changed(GLib.Object o, GLib.ParamSpec ps) {
+        var config = Config.Facade.get_instance();
+        config.set_gtk_theme_variant(switch_dark.active);
+
+        Gtk.Settings.get_default().gtk_application_prefer_dark_theme = switch_dark.active;
+    }
+
     private void on_radio_changed() {
         var config = Config.Facade.get_instance();
 
@@ -183,7 +185,7 @@ public class PreferencesDialog : Gtk.Dialog {
     // the help viewer and specify the full path to the subsection we want...
     private bool on_local_pattern_help(string ignore) {
         try {
-            Resources.launch_help(AppWindow.get_instance().get_screen(), "other-files.page");
+            Resources.launch_help(AppWindow.get_instance(), "other-files.page");
         } catch (Error e) {
             message("Unable to launch help: %s", e.message);
         }
@@ -294,7 +296,6 @@ public class PreferencesDialog : Gtk.Dialog {
     // For items that should only be committed when the dialog is closed, not as soon as the change
     // is made.
     private void commit_on_close() {
-        Config.Facade.get_instance().commit_bg_color();
         Config.Facade.get_instance().set_auto_import_from_library(autoimport.active);
         Config.Facade.get_instance().set_commit_metadata_to_masters(write_metadata.active);
 
@@ -326,25 +327,6 @@ public class PreferencesDialog : Gtk.Dialog {
         commit_on_close();
     }
 
-    private void on_value_changed() {
-        set_background_color((double)(bg_color_adjustment.get_upper() -
-            bg_color_adjustment.get_value()) / 65535.0);
-    }
-
-    private bool on_bg_color_reset(Gdk.EventButton event) {
-        if (event.button == 1 && event.type == Gdk.EventType.BUTTON_PRESS
-            && has_only_key_modifier(event.state, Gdk.ModifierType.CONTROL_MASK)) {
-            // Left Mouse Button and CTRL pressed
-            bg_color_slider.set_value(bg_color_adjustment.get_upper() -
-                (parse_color(Config.Facade.DEFAULT_BG_COLOR).red * 65536.0f));
-            on_value_changed();
-
-            return true;
-        }
-
-        return false;
-    }
-
     private void on_dir_pattern_combo_changed() {
         PathFormat pf = path_formats.get(dir_pattern_combo.get_active());
         if (null == pf.pattern) {
@@ -387,21 +369,6 @@ public class PreferencesDialog : Gtk.Dialog {
         return allow_closing;
     }
 
-    private void set_background_color(double bg_color_value) {
-        Config.Facade.get_instance().set_bg_color(to_grayscale(bg_color_value));
-    }
-
-    private Gdk.RGBA to_grayscale(double color_value) {
-        Gdk.RGBA color = Gdk.RGBA();
-
-        color.red = color_value;
-        color.green = color_value;
-        color.blue = color_value;
-        color.alpha = 1.0;
-
-        return color;
-    }
-
     private void on_photo_editor_changed() {
         int photo_app_choice_index = (photo_editor_combo.get_active() < external_photo_apps.size) ?
             photo_editor_combo.get_active() : external_photo_apps.size;