functionpanel.java

该系统是一个基于p2p的即时聊天系统

/*
 * @(#) FunctionPanel.java
 * Copyright 2004 HWStudio. All rights reserved.
 */
package hws.item.smart.panel.function;
//导入核心Java类库
import java.awt.CardLayout;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import javax.swing.JPanel;
//导入自定义Java类库
import hws.item.smart.misc.XMLConfig;
/**
 * 功能面板
 *
 * @version 0.1 2005-08-07
 * @author Hwerz
 */
public class FunctionPanel extends JPanel {
    /*------------------------------------------------------------------------*
     *                                属性定义                                *
     *------------------------------------------------------------------------*/
    /**
     * 该类自身的一个静态引用
     */
    private static FunctionPanel panel;
    /**
     * 中部面板的布局管理器
     */
    private static CardLayout cardLayout = new CardLayout();
    /*------------------------------------------------------------------------*
     *                                构造函数                                *
     *------------------------------------------------------------------------*/
    /**
     * 构造函数为私有，这样在整个运行过程中该类就只能有一个实例
     */
    private FunctionPanel() {
        super(cardLayout);
        for (int i = 0; i < XMLConfig.getParentButtonCount(); i++) {
            for (int j = 0; j < XMLConfig.getSonButtonCount(i); j++) {
                String l = XMLConfig.getSonButtonLabel(i, j);
                String c = XMLConfig.getSonButtonClass(i, j);
                try {
                    Class c2 = getClass().forName(c);
                    Method m = c2.getDeclaredMethod("getInstance", null);
                    JPanel p = (JPanel) m.invoke(null, null);
                    add(p, l);
                } catch (ClassNotFoundException e) {
                    e.printStackTrace();
                } catch (NoSuchMethodException e) {
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    e.printStackTrace();
                } catch (SecurityException e) {
                    e.printStackTrace();
                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                }
            }
        }
        int index1 = XMLConfig.getDefaultParentButtonIndex();
        int index2 = XMLConfig.getDefaultSonButtonIndex(index1);
        show(XMLConfig.getSonButtonLabel(index1, index2));
    }
    /*------------------------------------------------------------------------*
     *                                公共方法                                *
     *------------------------------------------------------------------------*/
    /**
     * 对该类提供的一个全局访问点，用来实例化该对象
     *
     * @return 该类唯一的一个实例
     */
    public static FunctionPanel getInstance() {
        if (panel == null) {
            panel = new FunctionPanel();
        }
        return panel;
    }
    /**
     * 显示具有指定标签的面板
     *
     * @param label 指定面板的标签
     */
    public void show(String label) {
        cardLayout.show(this, label);
    }
}