[gnome-control-center] sound: Flip the input level bar in RTL languages

[Bastien Nocera <hadess src gnome org>]

commit fb8b858cba020c850e09f65f9b4d83adecface3a
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Sep 22 23:04:02 2012 -0400

    sound: Flip the input level bar in RTL languages
    
    https://bugzilla.gnome.org/show_bug.cgi?id=684603

 panels/sound/gvc-level-bar.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/panels/sound/gvc-level-bar.c b/panels/sound/gvc-level-bar.c
index dd14aa9..f7a93cb 100644
--- a/panels/sound/gvc-level-bar.c
+++ b/panels/sound/gvc-level-bar.c
@@ -583,6 +583,8 @@ gvc_level_bar_draw (GtkWidget *widget,
 
         bar = GVC_LEVEL_BAR (widget);
 
+        cairo_save (cr);
+
         if (bar->priv->orientation == GTK_ORIENTATION_VERTICAL) {
                 int i;
                 int by;
@@ -622,6 +624,11 @@ gvc_level_bar_draw (GtkWidget *widget,
                 int i;
                 int bx;
 
+                if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) {
+                        cairo_scale (cr, -1, 1);
+                        cairo_translate (cr, -gtk_widget_get_allocated_width (widget), 0);
+                }
+
                 for (i = 0; i < NUM_BOXES; i++) {
                         bx = i * bar->priv->layout.delta;
                         curved_rectangle (cr,
@@ -655,6 +662,8 @@ gvc_level_bar_draw (GtkWidget *widget,
                 }
         }
 
+        cairo_restore (cr);
+
         return FALSE;
 }