[gtk+] GtkThemingEngine: Fix handles rendering

[Carlos Garnacho <carlosg src gnome org>]

commit 4c4df23d12169740c819f3f696b23aa38be3a3c5
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Jan 10 23:23:54 2011 +0100

    GtkThemingEngine: Fix handles rendering
    
    The wrong class was being used, so the theming engine didn't
    match it properly.

 gtk/gtkpaned.c         |    4 ++++
 gtk/gtkstylecontext.h  |    7 +++++++
 gtk/gtkthemingengine.c |    4 ++--
 3 files changed, 13 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkpaned.c b/gtk/gtkpaned.c
index 1a7e51e..6962059 100644
--- a/gtk/gtkpaned.c
+++ b/gtk/gtkpaned.c
@@ -648,6 +648,7 @@ static void
 gtk_paned_init (GtkPaned *paned)
 {
   GtkPanedPrivate *priv;
+  GtkStyleContext *context;
 
   gtk_widget_set_has_window (GTK_WIDGET (paned), FALSE);
   gtk_widget_set_can_focus (GTK_WIDGET (paned), TRUE);
@@ -684,6 +685,9 @@ gtk_paned_init (GtkPaned *paned)
   priv->handle_pos.y = -1;
 
   priv->drag_pos = -1;
+
+  context = gtk_widget_get_style_context (GTK_WIDGET (paned));
+  gtk_style_context_add_class (context, GTK_STYLE_CLASS_PANE_SEPARATOR);
 }
 
 static void
diff --git a/gtk/gtkstylecontext.h b/gtk/gtkstylecontext.h
index 309e275..00836d6 100644
--- a/gtk/gtkstylecontext.h
+++ b/gtk/gtkstylecontext.h
@@ -361,6 +361,13 @@ struct _GtkStyleContextClass
 #define GTK_STYLE_CLASS_DND "dnd"
 
 /**
+ * GTK_STYLE_CLASS_PANE_SEPARATOR:
+ *
+ * A CSS class for a pane separator, such as those in #GtkPaned.
+ */
+#define GTK_STYLE_CLASS_PANE_SEPARATOR "pane-separator"
+
+/**
  * GTK_STYLE_CLASS_INFO:
  *
  * A widget class for an area displaying an informational message,
diff --git a/gtk/gtkthemingengine.c b/gtk/gtkthemingengine.c
index f0d93dc..061d6fb 100644
--- a/gtk/gtkthemingengine.c
+++ b/gtk/gtkthemingengine.c
@@ -2604,7 +2604,7 @@ gtk_theming_engine_render_handle (GtkThemingEngine *engine,
   cairo_rectangle (cr, x, y, width, height);
   cairo_fill (cr);
 
-  if (gtk_theming_engine_has_class (engine, "grip"))
+  if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_GRIP))
     {
       GtkJunctionSides sides;
       gint skip = -1;
@@ -2869,7 +2869,7 @@ gtk_theming_engine_render_handle (GtkThemingEngine *engine,
 
       cairo_restore (cr);
     }
-  else if (gtk_theming_engine_has_class (engine, "paned"))
+  else if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_PANE_SEPARATOR))
     {
       if (width > height)
         for (xx = x + width / 2 - 15; xx <= x + width / 2 + 15; xx += 5)