add move_selected signal to allow overriding the default internal

2007-06-15  Matthias Clasen  <mclasen@redhat.com>

        * gtk/gtkmenushell.[ch]: add move_selected signal to allow
        overriding the default internal behaviour.  (#446833, Ryan Lortie)



svn path=/trunk/; revision=18145

1 files changed, 32 insertions, 4 deletions

diff --git a/gtk/gtkmenushell.c b/gtk/gtkmenushell.c
index 250c0ac737..79422f9587 100644
--- a/gtk/gtkmenushell.c
+++ b/gtk/gtkmenushell.c
@@ -57,6 +57,7 @@ enum {
   ACTIVATE_CURRENT,
   CANCEL,
   CYCLE_FOCUS,
+  MOVE_SELECTED,
   LAST_SIGNAL
 };
 
@@ -193,6 +194,8 @@ static void gtk_real_menu_shell_cycle_focus      (GtkMenuShell      *menu_shell,
 static void     gtk_menu_shell_reset_key_hash    (GtkMenuShell *menu_shell);
 static gboolean gtk_menu_shell_activate_mnemonic (GtkMenuShell *menu_shell,
 						  GdkEventKey  *event);
+static gboolean gtk_menu_shell_real_move_selected (GtkMenuShell  *menu_shell, 
+						   gint           distance);
 
 static guint menu_shell_signals[LAST_SIGNAL] = { 0 };
 
@@ -237,6 +240,7 @@ gtk_menu_shell_class_init (GtkMenuShellClass *klass)
   klass->cancel = gtk_real_menu_shell_cancel;
   klass->select_item = gtk_menu_shell_real_select_item;
   klass->insert = gtk_menu_shell_real_insert;
+  klass->move_selected = gtk_menu_shell_real_move_selected;
 
   menu_shell_signals[DEACTIVATE] =
     g_signal_new (I_("deactivate"),
@@ -289,7 +293,15 @@ gtk_menu_shell_class_init (GtkMenuShellClass *klass)
 			     _gtk_marshal_VOID__ENUM,
 			     G_TYPE_NONE, 1,
 			     GTK_TYPE_DIRECTION_TYPE);
-
+  menu_shell_signals[MOVE_SELECTED] =
+    g_signal_new (I_("move_selected"),
+		  G_OBJECT_CLASS_TYPE (object_class),
+		  G_SIGNAL_RUN_LAST,
+		  G_STRUCT_OFFSET (GtkMenuShellClass, move_selected),
+		  _gtk_boolean_handled_accumulator, NULL,
+		  _gtk_marshal_BOOLEAN__INT,
+		  G_TYPE_BOOLEAN, 1,
+		  G_TYPE_INT);
 
   binding_set = gtk_binding_set_by_class (klass);
   gtk_binding_entry_add_signal (binding_set,
@@ -1132,9 +1144,9 @@ gtk_menu_shell_activate_item (GtkMenuShell      *menu_shell,
 }
 
 /* Distance should be +/- 1 */
-static void
-gtk_menu_shell_move_selected (GtkMenuShell  *menu_shell, 
-			      gint           distance)
+static gboolean
+gtk_menu_shell_real_move_selected (GtkMenuShell  *menu_shell, 
+				   gint           distance)
 {
   if (menu_shell->active_menu_item)
     {
@@ -1185,6 +1197,19 @@ gtk_menu_shell_move_selected (GtkMenuShell  *menu_shell,
       if (node)
 	gtk_menu_shell_select_item (menu_shell, node->data);
     }
+
+  return TRUE;
+}
+
+/* Distance should be +/- 1 */
+static void
+gtk_menu_shell_move_selected (GtkMenuShell  *menu_shell, 
+			      gint           distance)
+{
+  gboolean handled = FALSE;
+
+  g_signal_emit (menu_shell, menu_shell_signals[MOVE_SELECTED], 0,
+		 distance, &handled);
 }
 
 /**
@@ -1261,6 +1286,9 @@ gtk_menu_shell_select_submenu_first (GtkMenuShell     *menu_shell)
 {
   GtkMenuItem *menu_item;
 
+  if (menu_shell->active_menu_item == NULL)
+    return FALSE;
+
   menu_item = GTK_MENU_ITEM (menu_shell->active_menu_item); 
   
   if (menu_item->submenu)