get_canvas_interface()->get_selection_manager()->clear_selected_layers();
layer=get_canvas_interface()->add_layer_to("region", canvas, depth);
if (!layer) return Smach::RESULT_ERROR;
get_canvas_interface()->get_selection_manager()->clear_selected_layers();
layer=get_canvas_interface()->add_layer_to("region", canvas, depth);
if (!layer) return Smach::RESULT_ERROR;