Java 自定义窗体（标题栏、窗体背景）

来源：互联网发布：淘宝联盟微信推广技巧编辑：程序博客网时间：2024/06/06 09:51

转自：http://hi.baidu.com/chengmaoning/item/b8e3b779ceb89d4a0e0a079c

最近在书上看到这篇文章，觉得挺有意思。与大家分享一下，具体可以参见明日科技出版的《Java经典编程300例》。

默认情况下，我们用java设计的界面窗体是这样的：

默认的标题栏、最大化、最小化、关闭按钮、窗体边框。

如何自定义窗体达到如下效果呢？

大致说下代码要点：

设置窗体的Undecorated属性为true，阻止窗体采用本机系统修饰，这样窗体就没有标题栏和边框了。
设计背景面板类。BackgroundPanel extends JPanel。
窗体面板添加标题栏面板，位置在上方。
标题栏面板添加背景面板显示标题栏图片、标题栏面板添加面板用于放置最大化、最小化、关闭按钮。
窗体面板添加背景面板在中间。contentPane.add(mianPanel,BorderLayout.Center);
添加按钮响应、添加标题栏拖动代码。

代码：

首先是带背景图片面板类：

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package cn.chengmaoning.customframe;      
              
import java.awt.Graphics;      
import java.awt.Image;      
              
import javax.swing.JPanel;      
              
public class BackgroundPanel extends JPanel {      
              
    /**      
     *       
     */
    private static final long serialVersionUID = -898997756345637309L;      
    private Image image;      
              
    /**      
     * Constructor      
     */
    public BackgroundPanel() {      
        super();      
        setOpaque(false);      
        setLayout(null);      
    }      
              
    /**      
     * @param image      
     *            要设置的 image      
     */
    public void setImage(Image image) {      
        this.image = image;      
    }      
              
    @Override
    protected void paintComponent(Graphics g) {      
        if (image != null) {      
            int width = getWidth();// 获取组件大小      
            int height = getHeight();      
            g.drawImage(image, 0, 0, width, height, this);// 绘制图片与组件大小相同      
        }      
        super.paintComponent(g);// 执行超类方法      
    }      
                  
}

其次再是主类：

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package cn.chengmaoning.customframe;     
            
import java.awt.BorderLayout;     
import java.awt.Dimension;     
import java.awt.EventQueue;     
import java.awt.FlowLayout;     
import java.awt.GridLayout;     
import java.awt.Image;     
import java.awt.Point;     
import java.awt.event.ActionEvent;     
import java.awt.event.ActionListener;     
import java.awt.event.ItemEvent;     
import java.awt.event.ItemListener;     
import java.awt.event.MouseAdapter;     
import java.awt.event.MouseEvent;     
import java.awt.event.MouseMotionAdapter;     
            
import javax.jws.Oneway;     
import javax.swing.ImageIcon;     
import javax.swing.JButton;     
import javax.swing.JFrame;     
import javax.swing.JPanel;     
import javax.swing.JToggleButton;     
            
public class ControlFormStatus extends JFrame {     
            
    /**     
     *      
     */
    private static final long serialVersionUID = -2214759764324605473L;     
    private JPanel contentPane;     
    private Point pressedPoint;     
                
    /**     
     * @param args     
     */
    public static void main(String[] args) {     
        // TODO 自动生成的方法存根     
        EventQueue.invokeLater(new Runnable() {     
                        
            @Override
            public void run() {     
                // TODO 自动生成的方法存根     
                try {     
                    ControlFormStatus frame = new ControlFormStatus();     
                    frame.setVisible(true);     
                } catch (Exception e) {     
                    // TODO: handle exception     
                    e.printStackTrace();     
                }     
            }     
        });     
    }     
                
    /**     
     * Constructor     
     */
    public ControlFormStatus(){     
        setUndecorated(true);     
        setDefaultCloseOperation(EXIT_ON_CLOSE);     
        setBounds(100, 100, 450, 300);     
        contentPane = new JPanel();     
        contentPane.setBorder(null);     
        contentPane.setLayout(new BorderLayout(0, 0));     
        setContentPane(contentPane);     
                    
        BackgroundPanel topPanel = new BackgroundPanel();     
        topPanel.addMouseMotionListener(new MouseMotionAdapter() {     
            @Override
            public void mouseDragged(MouseEvent e){     
                do_topPanel_mouseDragged(e);     
            }     
        });     
        topPanel.addMouseListener(new MouseAdapter() {     
            @Override
            public void mousePressed(MouseEvent e) {     
                // TODO 自动生成的方法存根     
                do_topPanel_mousePressed(e);     
            }     
        });     
        Image centerImage = new ImageIcon(getClass().getResource("frameTop.png")).getImage();     
        Dimension dimension = new Dimension(centerImage.getWidth(this), centerImage.getHeight(this));     
        topPanel.setPreferredSize(dimension);     
        topPanel.setImage(centerImage);     
                    
        contentPane.add(topPanel,BorderLayout.NORTH);     
        topPanel.setLayout(new FlowLayout(FlowLayout.RIGHT, 5, 5));     
                    
        JPanel panel = new JPanel();     
        panel.setPreferredSize(new Dimension(60, 22));     
        panel.setOpaque(false);     
        topPanel.add(panel);     
        panel.setLayout(new GridLayout(1, 0, 0, 0));     
                    
        JButton button = new JButton("");     
        button.setRolloverIcon(new ImageIcon(ControlFormStatus.class.getResource("minBH.jpg")));     
        button.addActionListener(new ActionListener() {     
                        
            @Override
            public void actionPerformed(ActionEvent e) {     
                // TODO 自动生成的方法存根     
                do_button_actionPerformed(e);     
            }     
        });     
        button.setFocusPainted(false);     
        button.setBorderPainted(false);     
        button.setContentAreaFilled(false);     
        button.setIcon(new ImageIcon(ControlFormStatus.class.getResource("minB.jpg")));     
        panel.add(button);     
                    
        JToggleButton button_1 = new JToggleButton("");     
        button_1.addItemListener(new ItemListener() {     
                        
            @Override
            public void itemStateChanged(ItemEvent e) {     
                // TODO 自动生成的方法存根     
                do_button_1_itemStateChanged(e);     
            }     
        });     
        button_1.setRolloverIcon(new ImageIcon(ControlFormStatus.class.getResource("maxBH.jpg")));     
        button_1.setRolloverSelectedIcon(new ImageIcon(ControlFormStatus.class.getResource("maxBH.jpg")));     
        button_1.setIcon(new ImageIcon(getClass().getResource("maxB.jpg")));     
        button_1.setContentAreaFilled(false);     
        button_1.setBorderPainted(false);     
        button_1.setFocusPainted(false);     
        panel.add(button_1);     
                    
        JButton button_2 = new JButton("");     
        button_2.addActionListener(new ActionListener() {     
                        
            @Override
            public void actionPerformed(ActionEvent e) {     
                // TODO 自动生成的方法存根     
                do_button_2_actionPerformed(e);     
            }     
        });     
        button_2.setRolloverIcon(new ImageIcon(getClass().getResource("closeBH.jpg")));     
        button_2.setIcon(new ImageIcon(getClass().getResource("closeB.jpg")));     
        button_2.setFocusPainted(false);     
        button_2.setContentAreaFilled(false);     
        button_2.setBorderPainted(false);     
        panel.add(button_2);     
                    
        BackgroundPanel baclBackgroundPanel_1 = new BackgroundPanel();     
        Image topImage = new ImageIcon(getClass().getResource("frameCenter.png")).getImage();     
        baclBackgroundPanel_1.setImage(topImage);     
        contentPane.add(baclBackgroundPanel_1, BorderLayout.CENTER);     
                    
    }     
            
    protected void do_button_2_actionPerformed(ActionEvent e) {     
        // TODO 自动生成的方法存根     
        dispose();     
    }     
            
    protected void do_button_1_itemStateChanged(ItemEvent e) {     
        // TODO 自动生成的方法存根     
        if (e.getStateChange() == ItemEvent.SELECTED) {     
            setExtendedState(MAXIMIZED_BOTH);     
        } else {     
            setExtendedState(NORMAL);     
        }     
    }     
            
    protected void do_button_actionPerformed(ActionEvent e) {     
        // TODO 自动生成的方法存根     
        setExtendedState(ICONIFIED);     
    }     
            
    protected void do_topPanel_mousePressed(MouseEvent e) {     
        // TODO 自动生成的方法存根     
        pressedPoint = e.getPoint();     
    }     
            
    protected void do_topPanel_mouseDragged(MouseEvent e) {     
        // TODO 自动生成的方法存根     
        Point point = e.getPoint();     
        Point locationPoint = getLocation();     
                    
        int x = locationPoint.x + point.x - pressedPoint.x;     
        int y = locationPoint.y + point.y - pressedPoint.y;     
                    
        setLocation(x, y);     
    }     
            
}

代码中用到的图片如下：（我不知道有什么更好的方法可以把图片保存到这篇文章里，所以只有贴到这里了，试验的同学可以直接另存图片到本机，放置到与.java相同路径下即可）

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