/**
  * Copyright (c): Uwe Schmidt, FH Wedel
  *
  * You may study, modify and distribute this source code
  * FOR NON-COMMERCIAL PURPOSES ONLY.
  * This copyright message has to remain unchanged.
  *
  * Note that this document is provided 'as is',
  * WITHOUT WARRANTY of any kind either expressed or implied.
  */

import java.applet.Applet;
import java.awt.*;

//--------------------

public
class MediaTrackerAnimation extends ImageAnimation {

  MediaTracker tracker;

  //--------------------

  public
  void init() {
    super.init();

    // die Bilder in einem
    // MediaTracker registrieren

    tracker = new MediaTracker(this);

    for (int i = 0;
	 i < images.length;
	 ++i) {
      tracker.addImage(images[i],i);
    }
  }

  //--------------------

  public
  void run() {

    while (Thread.currentThread() == animatorThread) {
      currImage += direction;
      if (currImage == images.length || currImage == -1) {
	direction = -direction;
	currImage += 2 * direction;
      }

      //--------------------
      // mit dem Zeichnen warten bis
      // das Bild geladen ist

      if ( ! tracker.checkID(currImage) ) {
	try {
	  showStatus("wait for loading image" + currImage);
	  tracker.waitForID(currImage);
	} catch (InterruptedException e) {
	  showStatus("MediaTracker error: " + e);
	}
      }

      //--------------------

      repaint();
      sleepAWhile();
    }
  }
}

//--------------------