コード例 #1
0
ファイル: paint.c プロジェクト: sam-m888/gtk
static void
drawing_area_hierarchy_changed (GtkWidget *widget,
                                GtkWidget *previous_toplevel)
{
  DrawingArea *area = (DrawingArea *) widget;
  GSimpleActionGroup *action_group;
  GSimpleAction *action;
  GtkWidget *toplevel;
  gint i;

  if (previous_toplevel && area->pad_controller)
    {
      gtk_widget_remove_controller (previous_toplevel,
                                    GTK_EVENT_CONTROLLER (area->pad_controller));
      area->pad_controller = NULL;
    }

  toplevel = gtk_widget_get_toplevel (GTK_WIDGET (area));
  if (!GTK_IS_WINDOW (toplevel))
    return;

  action_group = g_simple_action_group_new ();
  area->pad_controller = gtk_pad_controller_new (G_ACTION_GROUP (action_group),
                                                 NULL);

  for (i = 0; i < G_N_ELEMENTS (pad_actions); i++)
    {
      if (pad_actions[i].type == GTK_PAD_ACTION_BUTTON)
        {
          action = g_simple_action_new (pad_actions[i].action_name, NULL);
          g_object_set_data (G_OBJECT (action), "color",
                             (gpointer) pad_colors[i]);
          g_signal_connect (action, "activate",
                            G_CALLBACK (on_pad_button_activate), area);
        }
      else
        {
          action = g_simple_action_new_stateful (pad_actions[i].action_name,
                                                 G_VARIANT_TYPE_DOUBLE, NULL);
          g_signal_connect (action, "activate",
                            G_CALLBACK (on_pad_knob_change), area);
        }

      g_action_map_add_action (G_ACTION_MAP (action_group), G_ACTION (action));
      g_object_unref (action);
    }

  gtk_pad_controller_set_action_entries (area->pad_controller, pad_actions,
                                         G_N_ELEMENTS (pad_actions));

  gtk_widget_add_controller (toplevel,
                             GTK_EVENT_CONTROLLER (area->pad_controller));
}
コード例 #2
0
ファイル: paint.c プロジェクト: GNOME/gtk
static void
drawing_area_unroot (GtkWidget *widget)
{
  DrawingArea *area = (DrawingArea *) widget;
  GtkWidget *toplevel;

  toplevel = gtk_widget_get_toplevel (widget);

  if (area->pad_controller)
    {
      gtk_widget_remove_controller (toplevel, GTK_EVENT_CONTROLLER (area->pad_controller));
      area->pad_controller = NULL;
    }

  GTK_WIDGET_CLASS (drawing_area_parent_class)->unroot (widget);
}