ToggleTool.java 文件源码

private KeyUpHandler setUndoHandler() {
    final KeyUpHandler handler = new KeyUpHandler() {
        @Override
        public void onKeyUp(final KeyUpEvent event) {
            if (KeyCodes.KEY_U == event.getNativeEvent().getKeyCode()) {
                for (final Control control : controls) {
                    try {
                        ((DrawFeature) control).undo();
                    } catch (Exception e) {
                        LOGGER.error(
                                "ACTION UNDO: " + control.getControlId(), e);
                    }
                }
            }
        }
    };
    return handler;
}