[gtk+] Use gdk_screen_get_preferred_visual()

[Matthias Clasen <matthiasc src gnome org>]

commit 30fa1426cfec1d83aab2640db06e19e104d5a5d7
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Feb 4 13:13:52 2014 -0500

    Use gdk_screen_get_preferred_visual()
    
    When creating windows, and when returning a widgets
    visual, use the new API to get the preferred visual.

 gdk/gdkwindow.c |    2 +-
 gtk/gtkwidget.c |    9 ++-------
 2 files changed, 3 insertions(+), 8 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 4fe70bc..5a84ccc 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -1332,7 +1332,7 @@ gdk_window_new (GdkWindow     *parent,
   if (attributes_mask & GDK_WA_VISUAL)
     window->visual = attributes->visual;
   else
-    window->visual = gdk_screen_get_system_visual (screen);
+    window->visual = gdk_screen_get_preferred_visual (screen);
 
   window->event_mask = attributes->event_mask;
 
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 6deeb6e..cff67a1 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -10863,14 +10863,9 @@ gtk_widget_get_visual (GtkWidget *widget)
           g_warning ("Ignoring visual set on widget `%s' that is not on the correct screen.",
                      gtk_widget_get_name (widget));
         }
+    }
 
-  visual = gdk_screen_get_rgba_visual (screen);
-
-  if (visual == NULL ||
-      g_strcmp0 (g_getenv ("GDK_RGBA"), "0") != 0)
-    visual = gdk_screen_get_system_visual (screen);
-
-  return visual;
+  return gdk_screen_get_preferred_visual (screen);
 }
 
 /**