clock-make transparent calendars possible

Add support for transparent calendar windows, the window background color can be set to any color and alpha value or made transparent with the #MatePanelPopupWindow named widget selector in the gtk theme. Defaults to theme background color if not set, same as before. This is used only for the calendar window right now

1 files changed, 11 insertions, 0 deletions

diff --git a/applets/clock/clock.c b/applets/clock/clock.c
index bcd89fc0..b68cce62 100644
--- a/applets/clock/clock.c
+++ b/applets/clock/clock.c
@@ -876,6 +876,17 @@ create_calendar (ClockData *cd)
 			  G_CALLBACK (delete_event), cd->panel_button);
 	g_signal_connect (window, "key_press_event",
 			  G_CALLBACK (close_on_escape), cd->panel_button);
+			  
+        /*Name this window so the default theme can be overridden in panel theme,
+        otherwise default GtkWindow bg will be pulled in and override transparency */ 
+        gtk_widget_set_name(window, "MatePanelPopupWindow");
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+        /* Make transparency possible in the theme */              
+        GdkScreen *screen = gtk_widget_get_screen(GTK_WIDGET(window));
+        GdkVisual *visual = gdk_screen_get_rgba_visual(screen);
+        gtk_widget_set_visual(GTK_WIDGET(window), visual);
+#endif
 
 	return window;
 }