paintingdemo.java

J2ME lwuit实现屏幕九宫图,功能十分强大

/*
 * Copyright ?2008 Sun Microsystems, Inc. All rights reserved.
 * Use is subject to license terms.
 *
 */
package com.sun.lwuit.uidemo;

import com.sun.lwuit.Command;
import com.sun.lwuit.Component;
import com.sun.lwuit.Form;
import com.sun.lwuit.Graphics;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.events.ActionListener;
import com.sun.lwuit.layouts.BorderLayout;


/**
 * Demonstrates simple animation both static and manual
 *
 * @author Shai Almog
 */
public class PaintingDemo   extends Form implements ActionListener {
    public Form form = new Form("PaintingDemo");
    private  Command backCommand = new Command("Back", 1);
    private  Command nextCommand = new Command("next", 2);
    PaintingDemo()
    {
            form.addCommand(backCommand);
            form.addCommand(nextCommand);
            form.setCommandListener(this);
            form.setLayout(new BorderLayout());
            form.addComponent(BorderLayout.CENTER, new Painting());

    }
  public class Painting extends Component{
        private int w;
   public void paint(Graphics g) {
          g.setColor(0x000000);
          g.fillRect(0, 0, this.getWidth(), this.getHeight());
          w = getWidth();
          drawSqrt1(g);
          g.setColor(0xffffff);
          g.drawString("hellogv", 12, 33);

      }
           private void drawSqrt1(Graphics g) {
            long start = System.currentTimeMillis();

            int centerY1 = 50;

            //绘制X轴
            //设置绘图颜色为蓝色
            g.setColor(0x0000FF);
            g.drawLine(0, centerY1, w, centerY1);

            //设置绘图颜色为白色
            g.setColor(0xFFFFFF);
            int oldX = 0;
            int oldY1 = centerY1;

            int y1;
            for(int i=1;i<w;i++) {
                //              放大3倍
                y1 = centerY1 - (int)(3*Math.sqrt(i));
                g.drawLine(oldX, oldY1, i, y1);
                oldX = i;
                oldY1 = y1;
            }
            long time = System.currentTimeMillis() - start;
            System.out.println("drawSqrt1 Runtime: " + time);
        }

  }
    public void actionPerformed(ActionEvent arg0) {
        if(arg0.getCommand()==backCommand)
        {
            UIDemoMIDlet.backToMainMenu();
        }
        else if(arg0.getCommand()==nextCommand)
        {
          
        }
    }
}