appletdemo.java~13~

这是本人刚刚得到的JBuilder9软件开发项目实践的源码

package multimediademo;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.net.*;
import java.awt.image.*;
import multimediademo.ImageFilter;
import javax.swing.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class AppletDemo extends Applet implements Runnable{
  private boolean isStandalone = false;
  //变量申明
  private URL m_imageURL;            //图像的URL
  private String m_imageName;        //图像文件的名称
  Image sourceImage,filteredImage;    //图像类变量
  ImageFilter imageFilter;            //申明一个图像过滤器
  MediaTracker tracker;               //定义媒体跟踪器
  Thread thread = new Thread();      //定义一个空线程

  //Get a parameter value
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  //Construct the applet
  public AppletDemo() {
  }
  //重载的构造函数
/*  public AppletDemo(URL imageURL,String imageName){
    m_imageURL = imageURL;
    m_imageName = imageName;
  }*/

  //Initialize the applet
  public void init() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception {
    sourceImage = this.getImage(m_imageURL,m_imageName);
    filteredImage = sourceImage;
    ImageFilter imageFilter = new ImageFilter();
  }
  //Get Applet information
  public String getAppletInfo() {
    return "Applet Information";
  }
  //Get parameter info
  public String[][] getParameterInfo() {
    return null;
  }
  //定义paint函数
  public void paint(Graphics g){
    if(!tracker.checkAll(true)){
      this.showStatus("Now,the images are loading...");
    }
    else{
      this.showStatus("Loading images is over");
      g.drawImage(filteredImage,50,50,150,150,this);
    }
  }
  //线程开始函数
  public void start(){
    if(thread == null){
      thread = new Thread(this,"DemoThread");
      thread.start();
    }
  }
  //Overriding stop function
  public void stop(){
    if(thread != null){
      thread.stop();
      thread = null;
    }
  }
  //Overriding destroy function
  public void destroy(){
  }
  //Overriding run function
  public void run(){
    while(true){
      imageFilter.pixelValueChange();
      filteringImage();
      repaint();

      try{
        Thread.sleep(200);
      }
      catch(InterruptedException e)
      {}
    }
  }
  //定义过虑
  private void filteringImage(){
    ImageProducer producer = sourceImage.getSource();
    producer = new FilteredImageSource(producer,imageFilter);
    filteredImage = this.createImage(producer);
    tracker.addImage(filteredImage,1);
  }

  void this_mouseClicked(MouseEvent e) {
    JFileChooser imageChooser = new JFileChooser();
    int returnVal = imageChooser.showOpenDialog(this);
    if(returnVal == JFileChooser.APPROVE_OPTION){
      try {
        m_imageURL = imageChooser.getSelectedFile().toURL();
        m_imageName = imageChooser.getSelectedFile().getName();
      }
      catch (MalformedURLException ex) {}
    }
  }

}

class AppletDemo_this_mouseAdapter extends java.awt.event.MouseAdapter {
  AppletDemo adaptee;

  AppletDemo_this_mouseAdapter(AppletDemo adaptee) {
    this.adaptee = adaptee;
  }
  public void mouseClicked(MouseEvent e) {
    adaptee.this_mouseClicked(e);
  }
}