/***********************************************************************

 * mt4j Copyright (c) 2008 - 2009, C.Ruff, Fraunhofer-Gesellschaft All rights reserved.

 *  

 *   This program is free software: you can redistribute it and/or modify

 *   it under the terms of the GNU General Public License as published by

 *   the Free Software Foundation, either version 3 of the License, or

 *   (at your option) any later version.

 *

 *   This program is distributed in the hope that it will be useful,

 *   but WITHOUT ANY WARRANTY; without even the implied warranty of

 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *   GNU General Public License for more details.

 *

 *   You should have received a copy of the GNU General Public License

 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.

 *

 ***********************************************************************/

package org.mt4j.input.gestureAction;



import org.mt4j.components.MTComponent;

import org.mt4j.components.interfaces.IMTComponent3D;

import org.mt4j.input.inputProcessors.IGestureEventListener;

import org.mt4j.input.inputProcessors.MTGestureEvent;

import org.mt4j.input.inputProcessors.componentProcessors.scaleProcessor.ScaleEvent;

import org.mt4j.util.math.Vector3D;







/**

 * The Class DefaultScaleAction.

 * 

 * @author Christopher Ruff

 */

public class DefaultScaleAction implements IGestureEventListener,ICollisionAction {

	

	/** The target. */

	private IMTComponent3D target;

	

	/** The has scale limit. */

	private boolean hasScaleLimit;

	

	/** The min scale. */

	private float minScale;

	

	/** The max scale. */

	private float maxScale;

	

	/** The last event. */

	private MTGestureEvent lastEvent;

	

	/** The gesture aborted. */

	private boolean gestureAborted = false;

	

	/**

	 * Instantiates a new default scale action.

	 */

	public DefaultScaleAction(){

		this(null, 0,0, false);

	}

	

	/**

	 * Instantiates a new default scale action.

	 * 

	 * @param customTarget the custom target

	 */

	public DefaultScaleAction(IMTComponent3D customTarget){

		this(customTarget, 0,0, false);

	}

	

	

	

	

	/**

	 * Instantiates a new default scale action.

	 *

	 * @param minScaleFactor the min scale factor

	 * @param maxScaleFactor the max scale factor

	 */

	public DefaultScaleAction(float minScaleFactor, float maxScaleFactor){

		this(null, minScaleFactor, maxScaleFactor, true);

	}

	

	/**

	 * Instantiates a new default scale action.

	 *

	 * @param customTarget the custom target

	 * @param minScaleFactor the min scale factor

	 * @param maxScaleFactor the max scale factor

	 */

	public DefaultScaleAction(IMTComponent3D customTarget, float minScaleFactor, float maxScaleFactor){

		this(customTarget, minScaleFactor, maxScaleFactor, true);

	}

	

	

	/**

	 * Instantiates a new default scale action.

	 *

	 * @param customTarget the custom target

	 * @param minScaleFactor the min scale factor

	 * @param maxScaleFactor the max scale factor

	 * @param useScaleLimit  use scale limit

	 */

	private DefaultScaleAction(IMTComponent3D customTarget, float minScaleFactor, float maxScaleFactor, boolean useScaleLimit){

		this.target = customTarget;

		if (minScaleFactor < 0 || maxScaleFactor < 0){

			System.err.println("minScaleFactor < 0 || maxScaleFactor < 0    invalid settings!");

			this.hasScaleLimit = false;

		}else{

			this.hasScaleLimit = useScaleLimit;

		}

		this.minScale = minScaleFactor;

		this.maxScale = maxScaleFactor;

	}

	





	/* (non-Javadoc)

	 * @see org.mt4j.input.inputProcessors.IGestureEventListener#processGestureEvent(org.mt4j.input.inputProcessors.MTGestureEvent)

	 */

	public boolean processGestureEvent(MTGestureEvent g) {

		if (g instanceof ScaleEvent){

			ScaleEvent scaleEvent = (ScaleEvent)g;

			this.lastEvent = scaleEvent;

			

			if (target == null)

				target = scaleEvent.getTarget(); 

			

			switch (scaleEvent.getId()) {

			case MTGestureEvent.GESTURE_STARTED:

				if (target instanceof MTComponent){

					((MTComponent)target).sendToFront();

					/*

					Animation[] animations = AnimationManager.getInstance().getAnimationsForTarget(target);

					for (int i = 0; i < animations.length; i++) {

						Animation animation = animations[i];

						animation.stop();

					}

					*/

				}

				break;

			case MTGestureEvent.GESTURE_UPDATED:

				if(!gestureAborted)

				{

					if (this.hasScaleLimit){

						if (target instanceof MTComponent) {

							MTComponent comp = (MTComponent) target;

							

							//FIXME actually we should use globalmatrix but performance is better for localMatrix..

							Vector3D currentScale = comp.getLocalMatrix().getScale(); 

							

	//						if (currentScale.x != currentScale.y){

	//							System.out.println("non uniform scale!");

	//						}

							

							//We only check X because only uniform scales (x=y factor) should be used!

							if (currentScale.x * scaleEvent.getScaleFactorX() > this.maxScale){

	//							System.out.println("Scale MAX Limit Hit!");

								//We should set to min scale, but we choose performance over accuracy

								//float factor = (1f/currentScale.x) * maxScale;

								//target.scaleGlobal(factor, factor, scaleEvent.getScaleFactorZ(), scaleEvent.getScalingPoint());

							}else if (currentScale.x * scaleEvent.getScaleFactorX() < this.minScale){

	//							System.out.println("Scale MIN Limit Hit!");

								//We should set to min scale, but we choose performance over accuracy

								//float factor = (1f/currentScale.x) * minScale;

								//target.scaleGlobal(factor, factor, scaleEvent.getScaleFactorZ(), scaleEvent.getScalingPoint());

							}else{

								target.scaleGlobal(

										scaleEvent.getScaleFactorX(), 

										scaleEvent.getScaleFactorY(), 

										scaleEvent.getScaleFactorZ(), 

										scaleEvent.getScalingPoint());

							}

							

						}

					}else{

						target.scaleGlobal(

								scaleEvent.getScaleFactorX(), 

								scaleEvent.getScaleFactorY(), 

								scaleEvent.getScaleFactorZ(), 

								scaleEvent.getScalingPoint());

					}

				}

				break;

			case MTGestureEvent.GESTURE_CANCELED:

			case MTGestureEvent.GESTURE_ENDED:

				break;

			default:

				break;

			}

		}

		return false;

	}

	

	/* (non-Javadoc)

	 * @see org.mt4j.input.inputProcessors.ICollisionAction#gestureAborted()

	 */

	public boolean gestureAborted() {

		return this.gestureAborted;

	}



	/* (non-Javadoc)

	 * @see org.mt4j.input.inputProcessors.ICollisionAction#getLastEvent()

	 */

	public MTGestureEvent getLastEvent() {

		return this.lastEvent;

	}



	/* (non-Javadoc)

	 * @see org.mt4j.input.inputProcessors.ICollisionAction#setGestureAborted(boolean)

	 */

	public void setGestureAborted(boolean aborted) {

		this.gestureAborted = aborted;

	}



}