menupopper.java

来自「使用方法： 实例程序的运行： 每个实例下都有本实例的.xml文件或.htm」· Java 代码 · 共 38 行

package com.javaworld.mar2000.sax;

/*
 * Sample code for "SAX Appeal", by Mark Johnson, JavaWorld, March 2000.
 * Code is may be used for any legal purpose, including commercial
 * purposes, with no warranty expressed or implied.
 * email: [e-mail]
 */
import java.awt.*;
import java.awt.event.*;

/**
 * A MenuPopper stores a reference to a Component and a Menu retrieved
 * by name from a SaxMenuLoader.
 * The MenuPopper registers itself to listen for MouseEvents
 * on the Component, and when a right-mouse-click occurs, pops up the
 * associated menu item.
 */
public class MenuPopper extends java.awt.event.MouseAdapter {
	Component _component;
	PopupMenu _popup;
public MenuPopper(Component component_, SaxMenuLoader sml_, String sMenuToPop_) {
	_component = component_;
	_popup = sml_.popupmenuFind(sMenuToPop_);
	if (_popup != null) {
		_component.add(_popup);
	}
}
/**
 * Pop up menu when right mouse click occurs.
 */
public void mouseClicked(MouseEvent e) {
	if (_popup != null &&
		(e.getModifiers() & (MouseEvent.BUTTON2_MASK | MouseEvent.BUTTON3_MASK)) != 0) {
		_popup.show(_component, e.getX(), e.getY());
	}
}
}