/*
* ImageCanvas.java
*
* Created on February 25, 2002, 1:29 AM
*/
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.net.URL;
import java.net.MalformedURLException;
import java.io.File;
/**
*
* @author mike morrison
*/
public class ImageCanvas extends Canvas
{
final static int CONNECTED = 0;
final static int DISCONNECTED = 1;
final static int STOPPED = 2;
final private String connectingImageFilename = "init.jpg";
final private String cannotConnectImageFilename = "error.jpg";
private Applet applet;
private String host;
private int port;
private double fps;
private int connected=STOPPED;
private Dimension preferredSize;
private Graphics offGraphics;
private Image currentImage;
private Image offImage;
private PopupMenu popup;
private MenuItem startStop;
private ImageDownloader downloader;
private ImageCanvas thisImageCanvas;
private Frame about;
// chat not enabled...yet
private Frame chat = null;
private TextArea output;
private TextField input;
private TextField name = new TextField("name", 10);
/** Creates a new instance of ImageCanvas */
public ImageCanvas(Applet applet, String host, int port, int fps, int width, int height) {
this.applet = applet;
this.host = host;
this.port = port;
this.fps = fps;
preferredSize = new Dimension(width,height);
if (applet == null)
{
File f = new File(connectingImageFilename);
if(f.exists())
setImage(Toolkit.getDefaultToolkit().getImage(connectingImageFilename));
else
System.out.println(connectingImageFilename + " not found");
}
else
{
try {
setImage(applet.getImage(new URL(applet.getCodeBase().toString() + connectingImageFilename)));
} catch(MalformedURLException e) {}
}
about = createAbout();
add(createMenu());
thisImageCanvas = this;
// mouse listener
addMouseListener(createMouseListener());
downloader = new ImageDownloader(host,port, fps, this);
downloader.start();
}
public Dimension getPreferredSize(){
return preferredSize;
}
public double getFPS()
{
return fps;
}
public int getPort()
{
return port;
}
public String getHost()
{
return host;
}
/**
* returns the time it took to set the image
*/
public void setImageSize(Dimension size)
{
preferredSize = size;
setSize(size);
}
/**
* Sets Start/Stop menu item label
*/
public void setStartStopText(String text)
{
startStop.setLabel(text);
}
/**
* sets the current image (refreshes frame)
*/
public int setImage(Image img)
{
int count = 0, waitTime = 5;
while (!prepareImage(img,this))
{
wait(waitTime);
count ++;
if (count * waitTime > 5000) break;
}
currentImage = img;
repaint();
return (count * waitTime);
}
/**
* displays image in cannotConnectImageFilename upon failed connection
*/
public void couldNotConnect()
{
setStartStopText("Start");
if (applet == null)
{
File f = new File(cannotConnectImageFilename);
if(f.exists())
setImage(Toolkit.getDefaultToolkit().getImage(cannotConnectImageFilename));
else
System.out.println(cannotConnectImageFilename + " not found");
}
else
{
try {
setImage(applet.getImage(new URL(applet.getCodeBase().toString() + cannotConnectImageFilename)));
} catch(MalformedURLException e) {}
}
}
/**
* sets connected state
*/
public void setConnected(int connected)
{
this.connected = connected;
if(connected != CONNECTED)
{
if(chat != null)
{
chat.dispose();
chat = null;
}
}
repaint();
}
/**
* sleeps current thread for n milliseconds
*/
public void wait(int n){
try {
Thread.sleep(n);
} catch(InterruptedException e) {}
}
public void disconnect()
{
downloader.disconnect();
if(chat != null)
{
chat.dispose();
chat = null;
}
}
public MouseListener createMouseListener(){
return (new MouseListener(){
public void mouseClicked(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mousePressed(MouseEvent e){}
public void mouseReleased(MouseEvent e){
switch(e.getModifiers()){
case 16:
//left
break;
case 8:
//middle
break;
case 4:
if (connected != CONNECTED)
thisImageCanvas.startStop.setLabel("Start");
else
thisImageCanvas.startStop.setLabel("Stop");
popup.show(e.getComponent(),e.getX(), e.getY());
break;
default:
break;
}
}
});
}
/**
* create a simple chat window
*/
public Frame createChat()
{
if(connected != CONNECTED)
return null;
Frame f = new Frame("WebCam Chat");
Panel p = new Panel();
input = new TextField();
output = new TextArea("please type your name in the 'name' field\n");
p.setLayout(new BorderLayout());
f.setLayout(new BorderLayout());
p.add(input, BorderLayout.CENTER);
p.add(name, BorderLayout.WEST);
f.add(p, BorderLayout.SOUTH);
f.add(output, BorderLayout.CENTER);
output.setEditable(false);
input.addKeyListener(new KeyListener(){
public void keyTyped(KeyEvent e){}
public void keyPressed(KeyEvent e)
{
if(e.getKeyCode() == KeyEvent.VK_ENTER && !input.getText().equals(""))
{
String message = name.getText() + ": " + input.getText() + "\n";
output.append(message);
input.setText("");
downloader.queueChatText(message);
}
}
public void keyReleased(KeyEvent e) {}
});
f.addWindowListener(new WindowListener()
{
public void windowActivated(WindowEvent e){}
public void windowClosed(WindowEvent e){}
public void windowClosing(WindowEvent e){
chat.dispose();
chat = null;
}
public void windowDeactivated(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowOpened(WindowEvent e){}
});
f.setBounds(200,200,300,150);
f.show();
return f;
}
public Frame createAbout()
{
Frame f = new Frame("About");
Panel p = new Panel();
p.setLayout(new GridLayout(0,1));
p.add(new Label(" "));
p.add(new Label("Copyright (C) 2002"));
p.add(new Label("Applet by Mike Morrison"));
p.add(new Label("Server by Donn Morrison"));
p.add(new Label(" "));
Button b = new Button("Ok");
b.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
about.hide();
}
});
f.add(p,BorderLayout.NORTH);
p = new Panel();
p.setLayout(new FlowLayout());
p.add(b);
f.add(p,BorderLayout.CENTER);
f.pack();
f.setBackground(Color.lightGray);
f.setResizable(false);
return f;
}
public PopupMenu createMenu()
{
//create the menu
MenuItem menuItem;
popup = new PopupMenu("WebCam Options");
startStop = new MenuItem("Stop");
startStop.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
if (downloader == null || !downloader.isConnected()){
downloader = new ImageDownloader(thisImageCanvas.getHost(),thisImageCanvas.getPort(),thisImageCanvas.getFPS(),thisImageCanvas);
downloader.start();
downloader.setMaxFPS(thisImageCanvas.fps);
}else{
thisImageCanvas.fps = downloader.getMaxFPS();
downloader.disconnect();
downloader = null;
}
}
});
popup.add(startStop);
//frames per second submenu
Menu subMenu = new Menu("Max FPS");
menuItem = new MenuItem("0.1");
menuItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//set maxfps to 0.1
if (downloader != null){
downloader.setMaxFPS(.1);
thisImageCanvas.fps = .1;
}
}
});
subMenu.add(menuItem);
menuItem = new MenuItem("0.2");
menuItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//set maxfps to 0.2
if (downloader != null){
downloader.setMaxFPS(.2);
thisImageCanvas.fps = .2;
}
}
});
subMenu.add(menuItem);
menuItem = new MenuItem("0.5");
menuItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//set maxfps to 0.5
if (downloader != null){
downloader.setMaxFPS(.5);
thisImageCanvas.fps =.5;
}
}
});
subMenu.add(menuItem);
menuItem = new MenuItem("1");
menuItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//set maxfps to 1
if (downloader != null){
downloader.setMaxFPS(1.0);
thisImageCanvas.fps = 1.0;
}
}
});
subMenu.add(menuItem);
menuItem = new MenuItem("2");
menuItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//set maxfps to 2
if (downloader != null){
downloader.setMaxFPS(2.0);
thisImageCanvas.fps = 2.0;
}
}
});
subMenu.add(menuItem);
menuItem = new MenuItem("5");
menuItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//set maxfps to 5
if (downloader != null){
downloader.setMaxFPS(5.0);
thisImageCanvas.fps = 5.0;
}
}
});
subMenu.add(menuItem);
menuItem = new MenuItem("10");
menuItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//set maxfps to 10
if (downloader != null){
downloader.setMaxFPS(10.0);
thisImageCanvas.fps = 10.0;
}
}
});
subMenu.add(menuItem);
menuItem = new MenuItem("Unlimited");
menuItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//set maxfps to 30
if (downloader != null){
downloader.setMaxFPS(30.0);
thisImageCanvas.fps = 30.0;
}
}
});
subMenu.add(menuItem);
popup.add(subMenu);
popup.addSeparator();
//about
menuItem = new MenuItem("About");
menuItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//display about box
about.show();
}
});
popup.add(menuItem);
/* chat not enabled...yet
menuItem = new MenuItem("Chat");
menuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
if(chat == null)
chat = createChat();
}
});
popup.add(menuItem);
*/
return (popup);
}
//////////////////////////////////////////
// paint methods /////////////////////////
//////////////////////////////////////////
public void paint(Graphics g)
{
update(g);
}
public void update(Graphics g)
{
Color color = Color.black;
if (currentImage != null)
{
// dubble buffer
offImage = createImage(preferredSize.width,preferredSize.height);
offGraphics = offImage.getGraphics();
offGraphics.drawImage(currentImage,0,0,preferredSize.width,preferredSize.height,this);
g.drawImage(offImage,0,0,this);
switch(connected)
{
case CONNECTED:
color = new Color(30, 175, 30); // dark green
break;
case DISCONNECTED:
color = new Color(175,30,30); // dark red
break;
case STOPPED:
color = new Color(175,30,30); // dark red
break;
default:
break;
}
// display an indicator in bottom corner of frame
g.setColor(Color.black);
g.fillOval(preferredSize.width - 11, preferredSize.height - 11, 7, 7);
g.setColor(color);
g.fillOval(preferredSize.width - 12, preferredSize.height - 12, 7, 7);
// no double buffer
// g.drawImage(currentImage,0,0,preferredSize.width,preferredSize.height,this);
}
}
}
