[gnome-software] React to theme changes

[Matthias Clasen <matthiasc src gnome org>]

commit eb850ef1114705ff72d9d40aed03fb305a5088a5
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Mar 10 08:14:47 2015 -0400

    React to theme changes
    
    We need to reload our app-specific css when the theme
    changes, or else things will look weird and broken.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=745961

 src/gs-application.c |   28 +++++++++++++++++++---------
 1 files changed, 19 insertions(+), 9 deletions(-)
---
diff --git a/src/gs-application.c b/src/gs-application.c
index 207e001..ffa8503 100644
--- a/src/gs-application.c
+++ b/src/gs-application.c
@@ -183,11 +183,24 @@ gs_application_show_first_run_dialog (GsApplication *app)
 }
 
 static void
+theme_changed (GtkSettings *settings, GParamSpec *pspec, GsApplication *app)
+{
+       _cleanup_object_unref_ GFile *file = NULL;
+       _cleanup_free_ gchar *theme = NULL;
+
+       g_object_get (settings, "gtk-theme-name", &theme, NULL);
+       if (g_strcmp0 (theme, "HighContrast") == 0) {
+               file = g_file_new_for_uri ("resource:///org/gnome/Software/gtk-style-hc.css");
+       } else {
+               file = g_file_new_for_uri ("resource:///org/gnome/Software/gtk-style.css");
+       }
+       gtk_css_provider_load_from_file (app->provider, file, NULL);
+}
+
+static void
 gs_application_initialize_ui (GsApplication *app)
 {
        static gboolean initialized = FALSE;
-       gchar *theme;
-       _cleanup_object_unref_ GFile *file = NULL;
 
        if (initialized)
                return;
@@ -202,13 +215,10 @@ gs_application_initialize_ui (GsApplication *app)
        gtk_style_context_add_provider_for_screen (gdk_screen_get_default (),
                                                   GTK_STYLE_PROVIDER (app->provider),
                                                   GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
-       g_object_get (gtk_settings_get_default (), "gtk-theme-name", &theme, NULL);
-       if (g_strcmp0 (theme, "HighContrast") == 0) {
-               file = g_file_new_for_uri ("resource:///org/gnome/Software/gtk-style-hc.css");
-       } else {
-               file = g_file_new_for_uri ("resource:///org/gnome/Software/gtk-style.css");
-       }
-       gtk_css_provider_load_from_file (app->provider, file, NULL);
+
+       g_signal_connect (gtk_settings_get_default (), "notify::gtk-theme-name",
+                         G_CALLBACK (theme_changed), app);
+       theme_changed (gtk_settings_get_default (), NULL, app);
 
        gs_application_initialize_plugins (app);