public void register() {
actions.put("clear_action", new ClearAction());
actions.put("create_dot_action", new CreateDotAction());
actions.put("create_rectangle_action", new CreateRectangleAction());
actions.put("create_straight_line_action", new CreateStraightLineAction());
actions.put("create_oval_action", new CreateOvalAction());
actions.put("import_shapes_action", new ImportShapesAction());
}