[gtk+/gtk-style-context] Use gtk_render_activity() when rendering progressbars through GtkStyle

[Carlos Garnacho <carlosg src gnome org>]

commit 17dae1385ea7e6496fc2179d268d5845de04443d
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Nov 21 19:38:07 2010 +0100

    Use gtk_render_activity() when rendering progressbars through GtkStyle

 gtk/gtkstyle.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkstyle.c b/gtk/gtkstyle.c
index eaa0a25..482cdf4 100644
--- a/gtk/gtkstyle.c
+++ b/gtk/gtkstyle.c
@@ -2540,8 +2540,13 @@ gtk_default_draw_box (GtkStyle      *style,
 
   cairo_save (cr);
 
-  gtk_render_background (context, cr, x, y, width, height);
-  gtk_render_frame (context, cr, x, y, width, height);
+  if (gtk_style_context_has_class (context, GTK_STYLE_CLASS_PROGRESSBAR))
+    gtk_render_activity (context, cr, x, y, width, height);
+  else
+    {
+      gtk_render_background (context, cr, x, y, width, height);
+      gtk_render_frame (context, cr, x, y, width, height);
+    }
 
   cairo_restore (cr);
   gtk_style_context_restore (context);