Java模拟Windows开始菜单

1、package windowcomponents;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Font;import java.awt.FontMetrics;import java.awt.GradientPaint;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Image;import java.awt.Insets;import java.awt.event.ActionEvent;import java.aw

2、t.event.ActionListener;import java.awt.geom.AffineTransform;import java.awt.image.BufferedImage;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JMenuItem;import javax.swing.JPanel;import javax.swing.JPopupMenu;public class WindowsStartMenuSimulati

3、on /* * param args */public static void main(String args) / TODO Auto-generated method stubDemoWindow15 dw = new DemoWindow15(模拟Windows开始菜单);dw.setBounds(dw.getToolkit().getScreenSize().width / 3, dw.getToolkit().getScreenSize().height / 3,dw.getToolkit().getScreenSize().width / 3, dw.getToolkit().g

4、etScreenSize().height / 3);dw.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);dw.setVisible(true);class DemoWindow15 extends JFrame implements ActionListener / 菜单项图片Image updateImage = new ImageIcon(images/update.gif).getImage();Image programImage = new ImageIcon(images/program.gif).getImage();Image

5、documentImage = new ImageIcon(images/document.gif).getImage();Image setImage = new ImageIcon(images/set.gif).getImage();Image findImage = new ImageIcon(images/find.gif).getImage();Image helpImage = new ImageIcon(images/help.gif).getImage();Image runImage = new ImageIcon(images/run.gif).getImage();Im

6、age logoutImage = new ImageIcon(images/logout.gif).getImage();Image shutdownImage = new ImageIcon(images/shutdown.gif).getImage();/ 按钮图片ImageIcon windowsImage = new ImageIcon(images/windows.gif);/ “开始”按钮JButton jb = new JButton(开始, windowsImage);StartMenu sm = new StartMenu();/ 布局面板JPanel jp1 = new

7、JPanel();JPanel jp2 = new JPanel();ImageMenu1 im = null;public DemoWindow15(String title) super(title);jb.setFont(new Font(宋体, Font.BOLD, 18);jp2.setLayout(new BorderLayout();jp2.add(jb, BorderLayout.WEST);add(jp1, BorderLayout.CENTER);add(jp2, BorderLayout.SOUTH);im = new ImageMenu1(Windows Update,

8、 updateImage);im.setFont(new Font(宋体, Font.BOLD, 22);sm.add(im);im = new ImageMenu1(程序, programImage);im.setFont(new Font(宋体, Font.BOLD, 22);sm.add(im);im = new ImageMenu1(文档, documentImage);im.setFont(new Font(宋体, Font.BOLD, 22);sm.add(im);im = new ImageMenu1(设置, setImage);im.setFont(new Font(宋体, F

9、ont.BOLD, 22);sm.add(im);im = new ImageMenu1(搜索, findImage);im.setFont(new Font(宋体, Font.BOLD, 22);sm.add(im);im = new ImageMenu1(帮助和支持, helpImage);im.setFont(new Font(宋体, Font.BOLD, 22);sm.add(im);im = new ImageMenu1(运行, runImage);im.setFont(new Font(宋体, Font.BOLD, 22);sm.add(im);im = new ImageMenu

10、1(注销, logoutImage);im.setFont(new Font(宋体, Font.BOLD, 22);sm.add(im);im = new ImageMenu1(关机, shutdownImage);im.setFont(new Font(宋体, Font.BOLD, 22);sm.add(im);/ 添加事件监听器jb.addActionListener(this);public void actionPerformed(ActionEvent e) / TODO Auto-generated method stub/ 设置菜单可见，获得菜单的高度，便于下一步设置菜单的位置s

11、m.setVisible(true);/ 显示图片菜单，通过位置设置，显示向上弹出的效果sm.show(jp1, 0, jp1.getHeight() - sm.getHeight();class StartMenu extends JPopupMenu / 显示Windows XP professional的文字图片private Image image = null;public StartMenu() / 创建文字图片image = createImage();public Image createImage() String text = Windows XP Professional

12、;/ 创建缓冲图片类变量BufferedImage bi = new BufferedImage(30, 400,BufferedImage.TYPE_INT_ARGB);/ 获取缓冲图片的2D绘图类变量Graphics2D g2d = bi.createGraphics();/ 绘制渐变背景GradientPaint paint = new GradientPaint(0, 0, Color.black, 100, 100,Color.blue, true);g2d.setPaint(paint);g2d.fillRect(0, 0, bi.getWidth(), bi.getHeight(

13、);/ 逆时针旋转绘制角度90度AffineTransform at = new AffineTransform();at.rotate(-Math.PI / 2);g2d.setTransform(at);g2d.setColor(Color.white);g2d.setFont(new Font(宋体, Font.BOLD, 16);/ 获取文字尺寸FontMetrics metrics = g2d.getFontMetrics();int width = metrics.stringWidth(text);int height = metrics.getAscent();/ 居中绘制文字

14、g2d.drawString(text, -width - 50, bi.getWidth() / 2);return bi;public Insets getInsets() Insets insets = (Insets) super.getInsets().clone();insets.left += image.getWidth(null);return insets;public void paint(Graphics g) super.paint(g);if (image != null) Insets insets = getInsets();g.drawImage(image, insets.left - image.getWidth(null), insets.top,null);/ 图片菜单项类class ImageMenu1 extends JMenuItem private Image image = null;public ImageMenu1(String title, Image image) super(title);this.image = image;/ 设置菜单项中显示文字图片的间隔大小public Insets getInsets() Inse