spamboxpanel.java

该系统是一个基于p2p的即时聊天系统

/*
 * @(#) SpamboxPanel.java
 * Copyright 2004 HWStudio. All rights reserved.
 */
package hws.item.smart.panel.function.mail;
//导入核心Java类库
import java.awt.Insets;
import java.awt.FlowLayout;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import javax.swing.JPanel;
import javax.swing.JButton;
//导入自定义Java类库
import hws.item.smart.misc.ImageShop;
import hws.item.smart.misc.SBChanger;
import hws.item.smart.action.mail.spambox.DeleteMailAction;
/**
 * 垃圾箱面板
 *
 * @version 0.1 2005-09-01
 * @author Hwerz
 */
public class SpamboxPanel extends JPanel {
    /*------------------------------------------------------------------------*
     *                                属性定义                                *
     *------------------------------------------------------------------------*/
    /**
     * 该类自身的一个静态引用
     */
    private static SpamboxPanel panel;
    /*------------------------------------------------------------------------*
     *                                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 SpamboxPanel() {
        super(new GridBagLayout());
        //工具栏面板
        GridBagConstraints constraints = new GridBagConstraints(
            //gridx, gridy
            0, 0,
            //gridwidth, gridheight
            1, 1,
            //weightx, weighty
            1.0, 0.0,
            //anchor
            GridBagConstraints.NORTH,
            //fill
            GridBagConstraints.HORIZONTAL,
            //insets
            new Insets(5, 0, 0, 0),
            //ipadx, ipady
            0, 0);
        add(new Toolbar(), constraints);
    }
    /*------------------------------------------------------------------------*
     *                                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 SpamboxPanel getInstance() {
        if (panel == null) {
            panel = new SpamboxPanel();
        }
        return panel;
    }
    /*------------------------------------------------------------------------*
     *                                 内部类                                 *
     *------------------------------------------------------------------------*/
    /**
     * 工具栏面板
     */
    class Toolbar extends JPanel {
        /**
         * Create a new instance of this class
         */
        public Toolbar() {
            super(new FlowLayout(FlowLayout.CENTER, 5, 0));
            //删除
            JButton button = new JButton(DeleteMailAction.getInstance());
            button.setIcon(ImageShop.DELETE_IMAGEICON);
            button.addMouseListener(new SBChanger(
                DeleteMailAction.getInstance().getHintInfo(), false));
            add(button);
        }
    }
}