[gnome-panel] panel: Add style class for orientation to PanelWidget

[Vincent Untz <vuntz src gnome org>]

commit c066f71550f699a3958aca392f1dcd78f36bc4d8
Author: Peter Hurley <peter hurleysoftware com>
Date:   Wed Mar 14 12:17:57 2012 -0400

    panel: Add style class for orientation to PanelWidget
    
      Add style class "horizontal" or "vertical" based on the orientation
      of the PanelWidget. This allows themeing to adjust styling for vertical
      panels. An example selector would be:
    
      PanelWidget.vertical {
        background-image: -gtk-gradient (linear, right top, left top,
                                         from (shade (@dark_bg_color, 1.15)),
                                         to (shade (@dark_bg_color, 0.95)));
      }
    
    Signed-off-by: Peter Hurley <peter hurleysoftware com>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=672070

 gnome-panel/panel-widget.c |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/gnome-panel/panel-widget.c b/gnome-panel/panel-widget.c
index a18fed0..d640c27 100644
--- a/gnome-panel/panel-widget.c
+++ b/gnome-panel/panel-widget.c
@@ -1692,6 +1692,7 @@ panel_widget_dispose (GObject *obj)
 static void
 panel_widget_init (PanelWidget *panel)
 {
+	GtkStyleContext *context;
 	GtkWidget *widget = (GtkWidget *) panel;
 
 	gtk_widget_set_events (
@@ -1710,6 +1711,9 @@ panel_widget_init (PanelWidget *panel)
 	panel->applets_hints = NULL;
 	panel->applets_using_hint = NULL;
 
+	context = gtk_widget_get_style_context (widget);
+	gtk_style_context_add_class (context, GTK_STYLE_CLASS_HORIZONTAL);
+
 	panel_background_init (&panel->background,
 			       (PanelBackgroundChangedNotify) panel_widget_background_changed,
 			       panel);
@@ -2533,8 +2537,20 @@ void
 panel_widget_set_orientation (PanelWidget    *panel_widget,
 			      GtkOrientation  orientation)
 {
+	GtkStyleContext *context;
+
 	panel_widget->orient = orientation;
 
+	context = gtk_widget_get_style_context (GTK_WIDGET (panel_widget));
+	if (orientation == GTK_ORIENTATION_HORIZONTAL) {
+		gtk_style_context_add_class (context, GTK_STYLE_CLASS_HORIZONTAL);
+		gtk_style_context_remove_class (context, GTK_STYLE_CLASS_VERTICAL);
+	} else {
+		gtk_style_context_add_class (context, GTK_STYLE_CLASS_VERTICAL);
+		gtk_style_context_remove_class (context, GTK_STYLE_CLASS_HORIZONTAL);
+	}
+	panel_widget_style_updated (GTK_WIDGET (panel_widget));
+
 	gtk_widget_queue_resize (GTK_WIDGET (panel_widget));
 }