@Override
	public void keyPressed(KeyEvent e) {

		int key = e.getKeyCode();

		if(e.isControlDown() && uManager.canUndo()) {

			// C-z でUndo実行
			if(key == KeyEvent.VK_Z && uManager.canUndo()) {
				uManager.undo();
				e.consume();
			}

			// C-y でRedo実行
			if(key == KeyEvent.VK_Y && uManager.canRedo()) {
				uManager.redo();
				e.consume();
			}
		}
	}