Application: rely on Granite.StyleManager (#183)

Granite.StyleManager handles dark mode since 7.7.0

Author: danirabbit

README.md

@@ -9,7 +9,7 @@ Flatpak Installer
 
 You'll need the following dependencies:
 * libflatpak-dev
-* libgranite-7-dev
+* libgranite-7-dev (>= 7.7.0)
 * libgtk-4-dev
 * libxml2-dev
 * meson

meson.build

@@ -40,7 +40,7 @@ executable(
         dependency ('flatpak', version: '>=1.1.2'),
         dependency ('glib-2.0'),
         dependency ('gobject-2.0'),
-        dependency ('granite-7'),
+        dependency ('granite-7', version: '>=7.7.0'),
         dependency ('gtk4'),
         dependency ('libxml-2.0'),
     ],

src/Application.vala

@@ -70,15 +70,6 @@ public class Sideload.Application : Gtk.Application {
         base.startup ();
         Granite.init ();
 
-        var granite_settings = Granite.Settings.get_default ();
-        var gtk_settings = Gtk.Settings.get_default ();
-
-        gtk_settings.gtk_application_prefer_dark_theme = granite_settings.prefers_color_scheme == DARK;
-
-        granite_settings.notify["prefers-color-scheme"].connect (() => {
-            gtk_settings.gtk_application_prefer_dark_theme = granite_settings.prefers_color_scheme == DARK;
-        });
-
         var quit_action = new SimpleAction ("quit", null);
 
         add_action (quit_action);