package com.qiu.demo;
import Java.awt.*;
import javax.swing.*;
import java.awt.event.*;
/**
* 一个封装了LookAndFeel子菜单 可用于改变组件的LookAndFeel 这些LookAndFeel是JRE自带的 LookAndFeel
* 这些组件必须与一个父组件的相 关联,才可更新LookAndFeel
*
* @author QIU_BaiChao
*/
public class JLookAndFeelMenu extends JMenu {
/**
* 默认的菜单名
*/
private static final String defaultMenuName = "LookAndFeel";
/**
* 得到系统的安装的所有LookAndFeel
*/
UIManager.LookAndFeelInfo[] info = UIManager.getInstalledLookAndFeels();
/**
* 按钮组,将一组LookAndFeel的单选按钮放在里面
*/
ButtonGroup buttonGroup = new ButtonGroup();
/**
* 父组件,更新LookAndFeel只能更新
* 在同一个父组件的LookAndFeel
*/
Component parent;
/**
* 构造函数
*
* @param menuName
* 菜单名
* @param parrent
* 父组件,将在同一个父组
* 件容器的所有Component更新LookAndFeel
*/
public JLookAndFeelMenu(String menuName, final Component parent) {
// 生成各个可以选择LookAndFeel的单选按钮子菜单
// generateLookAndFeelSubMenu(parent);
setParentComponent(parent);
// 设置菜单名
this.setText(menuName);
}
/**
* 构造函数 使用默认的菜单名:LookAndFeel
*
* @param parent
* 父组件,将在同一个父组件容器的
* 所有Component更新LookAndFeel
*/
public JLookAndFeelMenu(Component parent) {
this(defaultMenuName, parent);
}
/**
* 默认构造函数 使用默认的菜单名,
* 还需设置父组件方法
* 调用setParentComponent(Component parent)方法
*/
public JLookAndFeelMenu() {
super(defaultMenuName);
}
/**
* 生成LookAndFeel的单选子菜单
*
* @param parent
*/
private void generateLookAndFeelSubMenu(final Component parent) {
for (int i = 0; i < info.length; i++) {
JRadioButtonMenuItem item = new JRadioButtonMenuItem(info[i]
.getName(), i == 0);
final String className = info[i].getClassName();
// 增加事件处理
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evn) {
try {
UIManager.setLookAndFeel(className);
} catch (Exception e) {
e.printStackTrace();
}
// 更新组件的LookAndFeel
SwingUtilities.updateComponentTreeUI(parent);
}
});
buttonGroup.add(item);
add(item);
}
}