Added GtkTreeMenuHeaderFunc to decide if a submenu gets a leaf header.

GtkComboBox needs treemenus to allow selection of all leafs including
rows which may have children, this allows the combobox or combobox user
to decide which row that has children can also be selectable as a header
leaf of the submenu. Test case testtreemenu updated to reflect this.

1 files changed, 71 insertions, 1 deletions

diff --git a/tests/testtreemenu.c b/tests/testtreemenu.c
index d099f0d3fc..e514f47522 100644
--- a/tests/testtreemenu.c
+++ b/tests/testtreemenu.c
@@ -16,7 +16,7 @@ static GtkCellRenderer *cell_1 = NULL, *cell_2 = NULL, *cell_3 = NULL;
 static GtkTreeModel *
 simple_tree_model (void)
 {
-  GtkTreeIter   iter, parent;
+  GtkTreeIter   iter, parent, child;
   GtkTreeStore *store = 
     gtk_tree_store_new (N_SIMPLE_COLUMNS,
 			G_TYPE_STRING,  /* name text */
@@ -84,6 +84,27 @@ simple_tree_model (void)
 		      SIMPLE_COLUMN_DESCRIPTION, "Eager",
 		      -1);
 
+  gtk_tree_store_append (store, &child, &iter);
+  gtk_tree_store_set (store, &child, 
+		      SIMPLE_COLUMN_NAME, "Jump",
+		      SIMPLE_COLUMN_ICON, "gtk-yes",
+		      SIMPLE_COLUMN_DESCRIPTION, "Very High",
+		      -1);
+
+  gtk_tree_store_append (store, &child, &iter);
+  gtk_tree_store_set (store, &child, 
+		      SIMPLE_COLUMN_NAME, "Pounce",
+		      SIMPLE_COLUMN_ICON, "gtk-no",
+		      SIMPLE_COLUMN_DESCRIPTION, "On Pooh",
+		      -1);
+
+  gtk_tree_store_append (store, &child, &iter);
+  gtk_tree_store_set (store, &child, 
+		      SIMPLE_COLUMN_NAME, "Bounce",
+		      SIMPLE_COLUMN_ICON, "gtk-cancel",
+		      SIMPLE_COLUMN_DESCRIPTION, "Around",
+		      -1);
+
   gtk_tree_store_append (store, &iter, &parent);
   gtk_tree_store_set (store, &iter, 
 		      SIMPLE_COLUMN_NAME, "Owl",
@@ -213,6 +234,44 @@ expand_cell_3_toggled (GtkToggleButton  *toggle,
 }
 
 static void
+menu_activated_cb (GtkTreeMenu *menu,
+		   const gchar *path,
+		   gpointer     unused)
+{
+  GtkTreeModel *model = gtk_tree_menu_get_model (menu);
+  GtkTreeIter   iter;
+  gchar        *row_name;
+
+  if (!gtk_tree_model_get_iter_from_string (model, &iter, path))
+    return;
+
+  gtk_tree_model_get (model, &iter, SIMPLE_COLUMN_NAME, &row_name, -1);
+
+  g_print ("Item activated: %s\n", row_name);
+
+  g_free (row_name);
+}
+
+gboolean 
+enable_submenu_headers (GtkTreeModel      *model,
+			GtkTreeIter       *iter,
+			gpointer           data)
+{
+  return TRUE;
+}
+
+
+static void
+submenu_headers_toggled (GtkToggleButton  *toggle,
+			 GtkTreeMenu      *menu)
+{
+  if (gtk_toggle_button_get_active (toggle))
+    gtk_tree_menu_set_header_func (menu, enable_submenu_headers, NULL, NULL);
+  else
+    gtk_tree_menu_set_header_func (menu, NULL, NULL, NULL);
+}
+
+static void
 tree_menu (void)
 {
   GtkWidget *window, *widget;
@@ -224,6 +283,8 @@ tree_menu (void)
 
   menu = simple_tree_menu ();
 
+  g_signal_connect (menu, "menu-activate", G_CALLBACK (menu_activated_cb), NULL);
+
   vbox  = gtk_vbox_new (FALSE, 4);
   gtk_widget_show (vbox);
 
@@ -278,6 +339,15 @@ tree_menu (void)
   g_signal_connect (G_OBJECT (widget), "toggled",
                     G_CALLBACK (expand_cell_3_toggled), menu);
 
+  widget = gtk_check_button_new_with_label ("Submenu Headers");
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (widget), FALSE);
+  gtk_widget_show (widget);
+  gtk_box_pack_start (GTK_BOX (vbox), widget, FALSE, FALSE, 0);
+  
+  g_signal_connect (G_OBJECT (widget), "toggled",
+                    G_CALLBACK (submenu_headers_toggled), menu);
+
+
   gtk_container_add (GTK_CONTAINER (window), vbox);
 
   gtk_widget_show (window);