[gnome-panel] libpanel-applet: Add style class for orientation to PanelApplet

[Vincent Untz <vuntz src gnome org>]

commit ac26fe53235bc70e94fd501ceaab0070086a57bf
Author: Peter Hurley <peter hurleysoftware com>
Date:   Wed Mar 14 12:22:19 2012 -0400

    libpanel-applet: Add style class for orientation to PanelApplet
    
      Add style class "horizontal" or "vertical" based on the orientation
      of the PanelApplet. This allows themeing to adjust styling for vertical
      panels. An example selector would be:
    
      PanelApplet.vertical
      PanelApplet.vertical > GtkMenuBar.menubar {
        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

 libpanel-applet/panel-applet.c |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)
---
diff --git a/libpanel-applet/panel-applet.c b/libpanel-applet/panel-applet.c
index 245e8fb..cee436c 100644
--- a/libpanel-applet/panel-applet.c
+++ b/libpanel-applet/panel-applet.c
@@ -651,12 +651,33 @@ static void
 panel_applet_set_orient (PanelApplet      *applet,
 			 PanelAppletOrient orient)
 {
+	GtkStyleContext *context;
+
 	g_return_if_fail (PANEL_IS_APPLET (applet));
 
 	if (applet->priv->orient == orient)
 		return;
 
 	applet->priv->orient = orient;
+
+	context = gtk_widget_get_style_context (GTK_WIDGET (applet));
+	switch (orient) {
+	case PANEL_APPLET_ORIENT_UP:
+	case PANEL_APPLET_ORIENT_DOWN:
+		gtk_style_context_add_class (context, GTK_STYLE_CLASS_HORIZONTAL);
+		gtk_style_context_remove_class (context, GTK_STYLE_CLASS_VERTICAL);
+		break;
+	case PANEL_APPLET_ORIENT_LEFT:
+	case PANEL_APPLET_ORIENT_RIGHT:
+		gtk_style_context_add_class (context, GTK_STYLE_CLASS_VERTICAL);
+		gtk_style_context_remove_class (context, GTK_STYLE_CLASS_HORIZONTAL);
+		break;
+	default:
+		g_assert_not_reached();
+		break;
+	}
+	gtk_widget_reset_style (GTK_WIDGET (applet));
+
 	g_signal_emit (G_OBJECT (applet),
 		       panel_applet_signals [CHANGE_ORIENT],
 		       0, orient);
@@ -2014,6 +2035,8 @@ panel_applet_setup (PanelApplet *applet)
 static void
 panel_applet_init (PanelApplet *applet)
 {
+	GtkStyleContext *context;
+
 	applet->priv = PANEL_APPLET_GET_PRIVATE (applet);
 
 	applet->priv->flags  = PANEL_APPLET_FLAGS_NONE;
@@ -2048,6 +2071,9 @@ panel_applet_init (PanelApplet *applet)
 			       GDK_BUTTON_PRESS_MASK |
 			       GDK_BUTTON_RELEASE_MASK);
 
+	context = gtk_widget_get_style_context (GTK_WIDGET (applet));
+	gtk_style_context_add_class (context, GTK_STYLE_CLASS_HORIZONTAL);
+
 	gtk_container_add (GTK_CONTAINER (applet->priv->plug), GTK_WIDGET (applet));
 }