aboutaction.java

该系统是一个基于p2p的即时聊天系统

/*
 * @(#) AboutAction.java
 * Copyright 2004 HWStudio. All rights reserved.
 */
package hws.item.smart.action.help;
//导入核心Java类库
import java.io.IOException;
import java.awt.Cursor;
import java.awt.Insets;
import java.awt.Graphics;
import java.awt.FontMetrics;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JOptionPane;
//导入自定义Java类库
import hws.item.smart.Smart;
import hws.item.smart.misc.XMLConfig;
import hws.item.smart.misc.ImageShop;
import hws.item.smart.misc.ColorShop;
import hws.item.smart.action.BaseAction;
/**
 * 显示程序信息，版本号及版权信息
 *
 * @version 0.1 2005-07-21
 * @author Hwerz
 */
public class AboutAction extends BaseAction {
    /*------------------------------------------------------------------------*
     *                                属性定义                                *
     *------------------------------------------------------------------------*/
    /**
     * 该类自身的一个静态引用
     */
    private static AboutAction action;
    /*------------------------------------------------------------------------*
     *                                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 AboutAction() {
        super("关于SmartNet", new Integer('a'));
        setHintInfo("显示程序信息，版本号及版权信息");
    }
    /*------------------------------------------------------------------------*
     *                                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 AboutAction getInstance() {
        if (action == null) {
            action = new AboutAction();
        }
        return action;
    }
    /*------------------------------------------------------------------------*
     *                                覆盖方法                                *
     *------------------------------------------------------------------------*/
    /**
     * 覆盖超类Action的方法
     *
     * @param event ActionEvent对象
     */
    public void actionPerformed(ActionEvent event) {
        JOptionPane.showMessageDialog(Smart.getInstance(),
            new AboutInfoPanel(), "关于SmartNet",
            JOptionPane.INFORMATION_MESSAGE, ImageShop.TITLE_IMAGEICON);
    }
    /*------------------------------------------------------------------------*
     *                                 内部类                                 *
     *------------------------------------------------------------------------*/
    /**
     * 关于信息面板
     */
    class AboutInfoPanel extends JPanel {
        /**
         * 主页标签
         */
        private JLabel homePageLabel;
        /**
         * 标记鼠标是否进入到homePageLabel的边界内
         */
        private boolean mouseEntered;
        /**
         * Create a new instance of this class
         */
        public AboutInfoPanel() {
            super(new GridBagLayout());
            mouseEntered = false;
            //名称标签
            GridBagConstraints constraints = new GridBagConstraints(
                //gridx, gridy
                0, 0,
                //gridwidth, gridheight
                1, 1,
                //weightx, weighty
                0.0, 0.0,
                //anchor
                GridBagConstraints.NORTHWEST,
                //fill
                GridBagConstraints.NONE,
                //insets
                new Insets(0, 0, 0, 0),
                //ipadx, ipady
                0, 0);
            add(new JLabel("名称："), constraints);
            constraints.gridx = 1;
            add(new JLabel(XMLConfig.getSoftwareName()), constraints);
            //版本标签
            constraints.gridx = 0;
            constraints.gridy = 1;
            add(new JLabel("版本："), constraints);
            constraints.gridx = 1;
            add(new JLabel(XMLConfig.getSoftwareVersion()), constraints);
            //描述标签
            constraints.gridx = 0;
            constraints.gridy = 2;
            add(new JLabel("描述："), constraints);
            constraints.gridx = 1;
            add(new JLabel(XMLConfig.getSoftwareDescription()), constraints);
            //主页标签
            constraints.gridx = 0;
            constraints.gridy = 3;
            add(new JLabel("主页："), constraints);
            constraints.gridx = 1;
            homePageLabel = new JLabel(XMLConfig.getSoftwareHomepage()) {
                public void paint(Graphics g) {
                    super.paint(g);
                    if (mouseEntered == true) {
                        FontMetrics metrics = g.getFontMetrics();
                        int width = metrics
                            .stringWidth(XMLConfig.getSoftwareHomepage());
                        int height = metrics.getHeight() - 1;
                        g.drawLine(0, height, width, height);
                    }
                }
            };
            homePageLabel.addMouseListener(new MouseAdapter() {
                public void mouseEntered(MouseEvent event) {
                    mouseEntered = true;
                    homePageLabel.setCursor(
                        Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
                    homePageLabel.setForeground(ColorShop.HYPERLINK1_COLOR);
                }
                public void mouseExited(MouseEvent event) {
                    mouseEntered = false;
                    homePageLabel.setCursor(Cursor.getDefaultCursor());
                    homePageLabel.setForeground(ColorShop.HYPERLINK2_COLOR);
                }
                public void mouseClicked(MouseEvent event) {
                    try {
                        StringBuffer buffer = new StringBuffer();
                        buffer.append("rundll32 SHELL32.DLL,ShellExec_RunDLL ");
                        buffer.append(XMLConfig.getSoftwareHomepage());
                        Runtime.getRuntime().exec(buffer.toString());
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            });
            add(homePageLabel, constraints);
            //版权标签
            constraints.gridx = 0;
            constraints.gridy = 4;
            add(new JLabel("版权："), constraints);
            constraints.gridx = 1;
            add(new JLabel(XMLConfig.getSoftwareCopyright()), constraints);
        }
    }
}