animatingsurface.java~1~

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package java2d;
import java.awt.*;



/**
 * Demos that animate extend this class.
 */
public abstract class AnimatingSurface extends Surface implements Runnable 
	{

    public Thread thread;

    public abstract void step(int w, int h);

    public abstract void reset(int newwidth, int newheight);


    public void start() {
        if (thread == null) {
            thread = new Thread(this);
            thread.setPriority(Thread.MIN_PRIORITY);
            thread.setName(name + " Demo");
            thread.start();
        }
    }


    public synchronized void stop() {
        if (thread != null) {
            thread.interrupt();
        }
        thread = null;
		max=(float)0.0;
        notifyAll();
    }


    public void run() {

        Thread me = Thread.currentThread();

        while (thread == me && !isShowing() || getSize().width == 0) {
            try {
                thread.sleep(500);
            } catch (InterruptedException e) { }
        }

        while (thread == me) {
            repaint();
            try {
                thread.sleep(500);
            } catch (InterruptedException e) { }
        }
        thread = null;
    }

	

	
}