Souvenir Source Code
/*****************************************************************************************
*
* Souvenir v1.01
*
* (c) Toh Lik Khoong, NavSurf.com 2000 dedicated to R.W.H
* The latest version of the applet may be found at http://navsurf.com
* This source code may not be reproduced without the express permission of the author.
*
******************************************************************************************/
/******************************************************************************************
*
* Sample applet for Searchlight
* <applet code=souvenir.class width=300 height=200>
* <param name=filename value="example.txt">
* <param name=bgcolor value="FFFFFF">
* <param name=target value="_blank">
* <param name=increment value="15">
* <param name=delay value="100">
* </applet>
*
*******************************************************************************************/
import java.applet.Applet;
import java.awt.image.MemoryImageSource;
import java.awt.image.PixelGrabber;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.net.*;
import java.io.*;
public class souvenir extends Applet implements Runnable{
private MediaTracker tracker = new MediaTracker(this);
private Image orimage = null;
private Image dbimage;
private Graphics dbgraphics;
private Thread thread = null;
private Color bgcolor = new Color(255, 255, 255);
private Vector images = new Vector();
private Vector urls = new Vector();
private int[] pixels;
private int[] buffer;
private String target = "_blank";
private int current_index = 0;
private int delay = 100;
private static int incr = 10;
public void init(){
String param;
// retrieval of parameters
param = getParameter("delay");
if (param != null) delay = Integer.parseInt(param);
if (delay < 10) delay = 10;
param = getParameter("bgcolor");
if (param != null) bgcolor = new Color(Integer.parseInt(param,16));
param = getParameter("target");
if (param != null) target = param;
param = getParameter("increment");
if (param != null) incr = Integer.parseInt(param);
if (incr > 255) incr = 255;
// define arrays
pixels = new int[size().width * size().height];
buffer = new int[size().width * size().height];
setBackground(bgcolor);
readFile();
// double buffering
dbimage = createImage(size().width, size().height);
dbgraphics = dbimage.getGraphics();
}
// wait while loading an image
private void waitForImage(int id){
while (!tracker.checkID(id, true)){
try{
Thread.sleep(20);
}catch(InterruptedException e){}
}
}
public boolean mouseUp(Event e, int x, int y){
URL url = (URL) urls.elementAt(current_index);
if (url != null){
getAppletContext().showDocument(url, target);
}
return true;
}
private void createEffect(int width, int height, int transparency){
int point;
int a, r, g, b;
for (int y = 0; y < height; y++){
for (int x = 0; x < width; x++){
int index = y * width + x;
point = pixels[index];
a = (point & 0xff000000) >> 24;
r = ((int) (((point & 0x00ff0000) >> 16) * transparency) + bgcolor.getRed() * (255 - transparency))/255;
g = ((int) (((point & 0x0000ff00) >> 8) * transparency) + bgcolor.getGreen() * (255 - transparency))/255;
b = ((int) ((point & 0x0000ff) * transparency) + bgcolor.getBlue() * (255 - transparency))/255;
buffer[index] = (a << 24) | (r << 16) | (g << 8) | b;
}
}
}
public void paint(Graphics g){
if (orimage != null){
dbgraphics.drawImage(orimage, (size().width - orimage.getWidth(null))/2, (size().height - orimage.getHeight(null))/2, this);
}
if (dbimage != null) g.drawImage(dbimage, 0, 0, this);
}
public void update(Graphics g){
paint(g);
}
public void start(){
thread = new Thread(this);
thread.start();
}
public void stop(){
thread = null;
}
private boolean fade_out = false;
public void run(){
Thread.currentThread().setPriority(Thread.NORM_PRIORITY - 1);
int transparency = 0;
while(true){
repaint();
try{
thread.sleep(delay);
}catch (InterruptedException e){}
waitForImage(current_index);
Image current_image = (Image) images.elementAt(current_index);
int w = current_image.getWidth(null) < size().width ? current_image.getWidth(null):size().width;
int h = current_image.getHeight(null) < size().height ? current_image.getHeight(null):size().height;
PixelGrabber pg = new PixelGrabber(current_image, 0, 0, w, h, pixels, 0, w);
try{
pg.grabPixels();
}catch (InterruptedException e){}
createEffect(w, h, transparency);
orimage = createImage(new MemoryImageSource(w, h, buffer, 0, w));
if (fade_out) transparency -= incr;
else transparency += incr;
if (transparency > 255){
if (current_index + 1 < images.size()) waitForImage(current_index + 1);
try{
Thread.sleep(2000);
}catch (InterruptedException e){}
transparency -= incr;
fade_out = true;
}
if (transparency < 0){
transparency += incr;
fade_out = false;
if (current_index + 1 < images.size()) current_index++;
else current_index = 0;
}
}
}
private void readFile(){
String filename = getParameter("filename");
if (filename != null){
try{
URL url = new URL(getDocumentBase(), filename);
String line;
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
int i = 0;
do{
line = in.readLine();
if (line != null){
StringTokenizer st = new StringTokenizer(line, "|");
if (st.hasMoreTokens()){
Image image = getImage(getDocumentBase(), st.nextToken());
images.addElement(image);
tracker.addImage(image, i++);
if (st.hasMoreTokens())
urls.addElement(new URL(getDocumentBase(), st.nextToken()));
else
urls.addElement(null);
}
}
}while (line != null);
}catch (Exception e){}
}
}
}
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