popuplistener.java

来自「图书管理系统：用户管理」· Java 代码 · 共 26 行

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JPopupMenu;
class PopupListener extends MouseAdapter{
	JPopupMenu popup;
	PopupListener(JPopupMenu popup){
		super();
		this.popup=popup;
	}
		public void mousePressed(MouseEvent e){
			maybeShowPopup(e);
		}
		
		public void mouseReleased (MouseEvent e){
			maybeShowPopup(e);
		}
		
		private void maybeShowPopup(MouseEvent e){
			if(e.isPopupTrigger()){ 
				// 如果鼠标右键是弹出式菜单则在当前鼠标位置显示该菜单
				popup.show(e.getComponent(),e.getX(),e.getY());
			}
			
		}
	}