import java.awt.Color;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.Graphics;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.image.ImageProducer;
import java.awt.image.ImageConsumer;
import java.awt.image.DirectColorModel;


public abstract class ProCon extends java.applet.Applet implements Runnable, ImageProducer {
    
    Graphics graphics;
    
    int _width;
    int _height;
    Image _image;
    Thread _thread;
    ImageConsumer _consumer;
    DirectColorModel _model;
    
    
    public abstract void Main(int width,int height);

    public synchronized void update(Object pixels) {
        
	if(_consumer!=null) {
            _consumer.setPixels(0,0,_width,_height,_model,(int[])pixels,0,_width);
            _consumer.imageComplete(ImageConsumer.SINGLEFRAMEDONE);
        }

        paint();
    }

    public void start() {
	
        if(_thread==null) {
            _thread = new Thread(this);
            _thread.start();
        }
    }

    public void run() {
	
        Dimension size = size();
	
        _width = size.width;
        _height = size.height;
	
        _model = new DirectColorModel(32,0x00FF0000,0x000FF00,0x000000FF,0);
        _image = Toolkit.getDefaultToolkit().createImage(this);
	
        Main(_width,_height);
    
    }

    
    public void stop() {
        
        if(_thread!=null && _thread.isAlive()) {
            _thread.stop();
        }
	
        _thread = null;
    
    }

    
    private synchronized void paint() {
	
        graphics = getGraphics();
        graphics.drawImage(_image,0,0,_width,_height,null);
	
    }

    public synchronized void addConsumer(ImageConsumer ic) {
	
        _consumer = ic;
        _consumer.setDimensions(_width,_height);
        _consumer.setHints(ImageConsumer.TOPDOWNLEFTRIGHT|ImageConsumer.COMPLETESCANLINES|ImageConsumer.SINGLEPASS|ImageConsumer.SINGLEFRAME);
        _consumer.setColorModel(_model);
	
    }

    public synchronized boolean isConsumer(ImageConsumer ic) {
        return true;
    }

    public synchronized void removeConsumer(ImageConsumer ic) {
	return;
    }

    public void startProduction(ImageConsumer ic) {
        addConsumer(ic);
    }

    public void requestTopDownLeftRightResend(ImageConsumer ic) {
        return;
    }

    
}