/*

 * QuickTime for Java SDK Sample Code

   Usage subject to restrictions in SDK License Agreement

 * Copyright: © 1996-1999 Apple Computer, Inc.

 */

package ds.actions;

import quicktime.app.actions.*;

import quicktime.QTException;

import quicktime.qd.*;

import quicktime.std.StdQTException;

import quicktime.std.image.Matrix;

import quicktime.app.display.QTDrawable;

import quicktime.app.image.Transformable;

import java.awt.Dimension;

/**

 * This class provides the capability of moving and bouncing a Transformable

 * object around within the space provided by the QTDrawable space that is

 * the space within which the transformable object is displayed, by the amount specified

 * by the deltaMatrix object.

 */ 

public class RotateAction extends MatrixAction {

//____________________________ CLASS VARIABLES

//____________________________ CLASS METHODS

    /**

     * Constructs a BounceAction object.

     * @param deltaX the amount by which the object is moved in the X dimension

     * @param deltaY the amount by which the object is moved in the Y dimension

     * @param space the space within which the object will be bounced and moved

     * @param scale the amount with which a second is divided into at a rate of one

     * @param period the number of scale ticks that elapse between invocations of the action.

     * @param target the target of the bounce action - the object that is moved

     */

    public RotateAction (int scale, int period, QTDrawable space, Transformable t) throws QTException {

        super (scale, period, space, t);

        doConstraintBoundsTesting = false;

    }

//____________________________ INSTANCE VARIABLES

    private float deltaDegree = 1;

//____________________________ INSTANCE METHODS 

    protected void rateDirectionChanged (boolean forwards) throws QTException {

        deltaDegree = -deltaDegree;

    }

    protected void transformMatrix (Matrix theMatrix) throws QTException {

        theMatrix.rotate (deltaDegree, theMatrix.getTx(), theMatrix.getTy());

    }

}

/*

 * $Log: /Biscotti/QTJavaDemos/DraggingSprites/src/ds/actions/RotateAction.java $

 * 

 * 2     3/11/99 5:36 PM Roger Smith

 * Update Source License Agreement

 * 

 * 1     16/11/98 6:50 PM Bill Stewart

 * new action

 */