[gdl] Add a "selected" signal to GdlDockItem

[James Liggett <jrliggett src gnome org>]

commit 7822921840396d2b31ab5a91fd208df3556342d7
Author: James Liggett <jrliggett cox net>
Date:   Tue Oct 27 00:29:45 2009 -0700

    Add a "selected" signal to GdlDockItem
    
    This signal is emitted when the item is selected from the switcher.

 gdl/gdl-dock-item.c     |   30 ++++++++++++++++++++++++++++++
 gdl/gdl-dock-item.h     |    2 +-
 gdl/gdl-dock-notebook.c |    5 +++++
 3 files changed, 36 insertions(+), 1 deletions(-)
---
diff --git a/gdl/gdl-dock-item.c b/gdl/gdl-dock-item.c
index 204cfce..2255974 100644
--- a/gdl/gdl-dock-item.c
+++ b/gdl/gdl-dock-item.c
@@ -157,6 +157,7 @@ enum {
     DOCK_DRAG_BEGIN,
     DOCK_DRAG_MOTION,
     DOCK_DRAG_END,
+    SELECTED,
     LAST_SIGNAL
 };
 
@@ -364,6 +365,22 @@ gdl_dock_item_class_init (GdlDockItemClass *klass)
                       1,
                       G_TYPE_BOOLEAN);
 
+    /**
+     * GdlDockItem::selected:
+     *
+     * Signals that this dock has been selected from a switcher.
+     */
+    gdl_dock_item_signals [SELECTED] =
+        g_signal_new ("selected",
+                      G_TYPE_FROM_CLASS (klass),
+                      G_SIGNAL_RUN_FIRST,
+                      0,
+                      NULL,
+                      NULL,
+                      g_cclosure_marshal_VOID__VOID,
+                      G_TYPE_NONE,
+                      0);
+
     klass->has_grip = TRUE;
     klass->dock_drag_begin = NULL;
     klass->dock_drag_motion = NULL;
@@ -1838,6 +1855,19 @@ gdl_dock_item_show_grip (GdlDockItem *item)
     };
 }
 
+/**
+ * gdl_dock_item_notify_selected:
+ * @item: the dock item to emit a selected signal on.
+ *
+ * This function emits the selected signal. It is to be used by #GdlSwitcher 
+ * to let clients know that this item has been switched to.
+ **/
+void
+gdl_dock_item_notify_selected (GdlDockItem *item)
+{
+    g_signal_emit (item, gdl_dock_item_signals [SELECTED], 0);
+}
+
 /* convenient function (and to preserve source compat) */
 /**
  * gdl_dock_item_bind:
diff --git a/gdl/gdl-dock-item.h b/gdl/gdl-dock-item.h
index 8b666e8..ea47a83 100644
--- a/gdl/gdl-dock-item.h
+++ b/gdl/gdl-dock-item.h
@@ -99,7 +99,6 @@ struct _GdlDockItemClass {
                                    gint            y);
     void     (* dock_drag_end)    (GdlDockItem    *item,
                                    gboolean        cancelled);
-                                   
     void     (* set_orientation)  (GdlDockItem    *item,
                                    GtkOrientation  orientation);
 };
@@ -159,6 +158,7 @@ void           gdl_dock_item_set_tablabel      (GdlDockItem *item,
 GtkWidget     *gdl_dock_item_get_grip          (GdlDockItem *item);
 void           gdl_dock_item_hide_grip         (GdlDockItem *item);
 void           gdl_dock_item_show_grip         (GdlDockItem *item);
+void           gdl_dock_item_notify_selected   (GdlDockItem *item);
 
 /* bind and unbind items to a dock */
 void           gdl_dock_item_bind              (GdlDockItem *item,
diff --git a/gdl/gdl-dock-notebook.c b/gdl/gdl-dock-notebook.c
index 3f59226..21179de 100644
--- a/gdl/gdl-dock-notebook.c
+++ b/gdl/gdl-dock-notebook.c
@@ -267,6 +267,7 @@ gdl_dock_notebook_switch_page_cb (GtkNotebook     *nb,
 {
     GdlDockNotebook *notebook;
     GtkWidget       *tablabel;
+    GdlDockItem     *item;
     
     notebook = GDL_DOCK_NOTEBOOK (data);
 
@@ -289,6 +290,10 @@ gdl_dock_notebook_switch_page_cb (GtkNotebook     *nb,
         GDL_DOCK_OBJECT (notebook)->master)
         g_signal_emit_by_name (GDL_DOCK_OBJECT (notebook)->master,
                                "layout-changed");
+
+    /* Signal that a new dock item has been selected */
+    item = GDL_DOCK_ITEM (gtk_notebook_get_nth_page (nb, page_num));
+    gdl_dock_item_notify_selected (item);
 }
 
 static void