/**               
 * @file    AutoRotate.java
 * @author  Robert S. Laramee
 * @see     DrawCanvas.java
 * <P> 
 * This class runs the auto rotoate function.  It's a separate class because
 * it's must to be it's own thread, so the application thread may still handle
 * user input events while our objects are rotating.  Otherwise, the objects
 * will rotate forever!
 */

import java.awt.*;
import java.awt.event.*;

class AutoRotate extends Thread {

    private DrawCanvas canvas;

    public AutoRotate(DrawCanvas c) { 
	
	canvas = c; 
    }

   /**
    * setAutoRotateMode
    * <P>
    * Beware, the paint() method will not clear the old shape(s) off of the 
    * canvas.  It will only add new ones
    *
    * @param newRotateMode -the axis about which to rotate
    */
    public void run () {
    
	if (canvas.getAutoRotateMode() == DrawCanvas.STOP)  {  return;  }

	Graphics g = canvas.getGraphics();

	while (canvas.getAutoRotateMode() != DrawCanvas.STOP) {

	    try {  
		Thread.sleep(canvas.getSleepTime());
		if (canvas.getAutoRotateMode() == DrawCanvas.ROTATEX) {
		
		    View.rotate( "x", canvas.getDegreesX() );  
		    canvas.setDegreesX();

		} else if (canvas.getAutoRotateMode() == DrawCanvas.ROTATEY) {
		
		    View.rotate( "y", canvas.getDegreesY() );
		    canvas.setDegreesY();

		} else if (canvas.getAutoRotateMode() == DrawCanvas.ROTATEZ) {
		
		    View.rotate( "z", canvas.getDegreesZ() );
		    canvas.setDegreesZ();

		} else if (canvas.getAutoRotateMode() == DrawCanvas.STOP) { 
		
		    break; 
		}
		canvas.update(g);   
	    } catch (InterruptedException e) {
		System.err.println("** Error: InterrruptException " + e);
	    }
	}
    }
}