/*
    * Copyright 2011 Daniel Kurka
    * 
    * Licensed under the Apache License, Version 2.0 (the "License"); you may not
    * use this file except in compliance with the License. You may obtain a copy of
    * the License at
    * 
    * http://www.apache.org/licenses/LICENSE-2.0
    * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   * License for the specific language governing permissions and limitations under
   * the License.
   */
  package com.googlecode.mgwt.ui.client.widget.touch;
  
  import com.google.gwt.core.client.GWT;
  import com.google.gwt.event.shared.GwtEvent;
  import com.google.gwt.event.shared.HandlerRegistration;
  import com.google.gwt.user.client.ui.Widget;
  import com.googlecode.mgwt.dom.client.event.mouse.HandlerRegistrationCollection;
  import com.googlecode.mgwt.dom.client.event.tap.HasTapHandlers;
  import com.googlecode.mgwt.dom.client.event.tap.TapEvent;
  import com.googlecode.mgwt.dom.client.event.tap.TapHandler;
  import com.googlecode.mgwt.dom.client.event.touch.HasTouchHandlers;
  import com.googlecode.mgwt.dom.client.event.touch.TouchCancelHandler;
  import com.googlecode.mgwt.dom.client.event.touch.TouchEndHandler;
  import com.googlecode.mgwt.dom.client.event.touch.TouchHandler;
  import com.googlecode.mgwt.dom.client.event.touch.TouchMoveHandler;
  import com.googlecode.mgwt.dom.client.event.touch.TouchStartHandler;
  import com.googlecode.mgwt.dom.client.recognizer.longtap.HasLongTapHandlers;
  import com.googlecode.mgwt.dom.client.recognizer.longtap.LongTapEvent;
  import com.googlecode.mgwt.dom.client.recognizer.longtap.LongTapHandler;
  import com.googlecode.mgwt.dom.client.recognizer.pinch.HasPinchHandlers;
  import com.googlecode.mgwt.dom.client.recognizer.pinch.PinchEvent;
  import com.googlecode.mgwt.dom.client.recognizer.pinch.PinchHandler;
  import com.googlecode.mgwt.dom.client.recognizer.swipe.HasSwipeHandlers;
  import com.googlecode.mgwt.dom.client.recognizer.swipe.SwipeEndEvent;
  import com.googlecode.mgwt.dom.client.recognizer.swipe.SwipeEndHandler;
  import com.googlecode.mgwt.dom.client.recognizer.swipe.SwipeMoveEvent;
  import com.googlecode.mgwt.dom.client.recognizer.swipe.SwipeMoveHandler;
  import com.googlecode.mgwt.dom.client.recognizer.swipe.SwipeStartEvent;
  import com.googlecode.mgwt.dom.client.recognizer.swipe.SwipeStartHandler;
  
  /**
   * A TouchDelegate can be used to source touch events from a widget that does
   * not support {@link HasTouchHandlers}
   * 
   * @author Daniel Kurka
   * @version $Id: $
   */
  
  public class TouchDelegate implements HasTouchHandlers, HasTapHandlers, HasSwipeHandlers, HasPinchHandlers, HasLongTapHandlers {
  
  	protected final GestureUtility gestureUtility;
  	private static final TouchWidgetImpl impl = GWT.create(TouchWidgetImpl.class);
  	private final Widget w;
  
  	/**
  	 * Construct a touchDelegate
  	 * 
  	 * @param w the widget to source touchevents from
  	 */
  	public TouchDelegate(Widget w) {
  		this.w = w;
  		gestureUtility = new GestureUtility(this);
  	}
  
  	/*
  	 * (non-Javadoc)
  	 * @see com.googlecode.mgwt.dom.client.event.touch.HasTouchHandlers#addTouchStartHandler(com.googlecode.mgwt.dom.client.event.touch.TouchStartHandler)
  	 */
  	/** {@inheritDoc} */
  	@Override
  	public HandlerRegistration addTouchStartHandler(TouchStartHandler handler) {
  		return impl.addTouchStartHandler(w, handler);
  
  	}
  
  	/*
  	 * (non-Javadoc)
  	 * @see com.googlecode.mgwt.dom.client.event.touch.HasTouchHandlers#addTouchMoveHandler(com.googlecode.mgwt.dom.client.event.touch.TouchMoveHandler)
  	 */
  	/** {@inheritDoc} */
  	@Override
  	public HandlerRegistration addTouchMoveHandler(TouchMoveHandler handler) {
  		return impl.addTouchMoveHandler(w, handler);
  
  	}
  
  	/*
  	 * (non-Javadoc)
  	 * @see com.googlecode.mgwt.dom.client.event.touch.HasTouchHandlers#addTouchCancelHandler(com.googlecode.mgwt.dom.client.event.touch.TouchCancelHandler)
  	 */
  	/** {@inheritDoc} */
  	@Override
  	public HandlerRegistration addTouchCancelHandler(TouchCancelHandler handler) {
  		return impl.addTouchCancelHandler(w, handler);
 
 	}
 
 	/*
 	 * (non-Javadoc)
 	 * @see com.googlecode.mgwt.dom.client.event.touch.HasTouchHandlers#addTouchEndHandler(com.googlecode.mgwt.dom.client.event.touch.TouchEndHandler)
 	 */
 	/** {@inheritDoc} */
 	@Override
 	public HandlerRegistration addTouchEndHandler(TouchEndHandler handler) {
 		return impl.addTouchEndHandler(w, handler);
 
 	}
 
 	@Override
 	public HandlerRegistration addTapHandler(TapHandler handler) {
 		gestureUtility.ensureTapRecognizer();
 		return w.addHandler(handler, TapEvent.getType());
 	}
 
 	public HandlerRegistration addTouchHandler(TouchHandler handler) {
 		HandlerRegistrationCollection handlerRegistrationCollection = new HandlerRegistrationCollection();
 
 		handlerRegistrationCollection.addHandlerRegistration(addTouchCancelHandler(handler));
 		handlerRegistrationCollection.addHandlerRegistration(addTouchStartHandler(handler));
 		handlerRegistrationCollection.addHandlerRegistration(addTouchEndHandler(handler));
 		handlerRegistrationCollection.addHandlerRegistration(addTouchMoveHandler(handler));
 		return handlerRegistrationCollection;
 	}
 
 	@Override
 	public void fireEvent(GwtEvent<?> event) {
 		w.fireEvent(event);
 
 	}
 
 	public HandlerRegistration addSwipeStartHandler(SwipeStartHandler handler) {
 		gestureUtility.ensureSwipeRecognizer();
 		return w.addHandler(handler, SwipeStartEvent.getType());
 	}
 
 	public HandlerRegistration addSwipeMoveHandler(SwipeMoveHandler handler) {
 		gestureUtility.ensureSwipeRecognizer();
 		return w.addHandler(handler, SwipeMoveEvent.getType());
 	}
 
 	public HandlerRegistration addSwipeEndHandler(SwipeEndHandler handler) {
 		gestureUtility.ensureSwipeRecognizer();
 		return w.addHandler(handler, SwipeEndEvent.getType());
 	}
 
 	@Override
 	public HandlerRegistration addPinchHandler(PinchHandler handler) {
 		gestureUtility.ensurePinchRecognizer(w);
 		return w.addHandler(handler, PinchEvent.getType());
 	}
 
 	@Override
 	public HandlerRegistration addLongTapHandler(LongTapHandler handler) {
 		gestureUtility.ensureLongTapHandler();
 		return w.addHandler(handler, LongTapEvent.getType());
 	}
 
 }