/**********************************************
    * Copyright (C) 2010 Lukas Laag
    * This file is part of lib-gwt-svg-samples.
    * 
    * libgwtsvg-samples 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.
    * 
   * libgwtsvg-samples 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 libgwtsvg-samples.  If not, see http://www.gnu.org/licenses/
   **********************************************/
  package org.vectomatic.svg.samples.client.smil;
  
  import java.util.Iterator;
  
  import org.vectomatic.dom.svg.OMSVGAnimateElement;
  import org.vectomatic.dom.svg.OMSVGCircleElement;
  import org.vectomatic.dom.svg.OMSVGSVGElement;
  import org.vectomatic.dom.svg.OMSVGTSpanElement;
  import org.vectomatic.dom.svg.OMSVGTextElement;
  import org.vectomatic.dom.svg.OMText;
  import org.vectomatic.dom.svg.events.BeginEvent;
  import org.vectomatic.dom.svg.events.BeginHandler;
  import org.vectomatic.dom.svg.events.EndEvent;
  import org.vectomatic.dom.svg.events.EndHandler;
  import org.vectomatic.dom.svg.events.RepeatEvent;
  import org.vectomatic.dom.svg.events.RepeatHandler;
  import org.vectomatic.dom.svg.utils.DOMHelper;
  import org.vectomatic.dom.svg.utils.SVGConstants;
  import org.vectomatic.dom.svg.utils.SVGPrefixResolver;
  import org.vectomatic.svg.samples.client.Main;
  import org.vectomatic.svg.samples.client.Main.MainBundle;
  import org.vectomatic.svg.samples.client.SampleBase;
  
  import com.google.gwt.core.client.GWT;
  import com.google.gwt.event.dom.client.ClickEvent;
  import com.google.gwt.uibinder.client.UiBinder;
  import com.google.gwt.uibinder.client.UiField;
  import com.google.gwt.uibinder.client.UiHandler;
  import com.google.gwt.user.client.Timer;
  import com.google.gwt.user.client.ui.Button;
  import com.google.gwt.user.client.ui.TabLayoutPanel;
  
  /**
   * Class to demonstrate the use of SVG/SMIL animations
   * @author laaglu
   */
  public class SmilSample extends SampleBase implements RepeatHandler, BeginHandler, EndHandler {
  	interface SmilSampleBinder extends UiBinder<TabLayoutPanel, SmilSample> {
  	}
  	private static SmilSampleBinder binder = GWT.create(SmilSampleBinder.class);
  
  	
  	@UiField(provided=true)
  	public static MainBundle mainBundle = Main.mainBundle;
  	@UiField
  	OMSVGSVGElement svg;
  	@UiField
  	OMSVGCircleElement circle;
  	@UiField
  	OMSVGTSpanElement countSpan;
  	@UiField
  	OMSVGTextElement beginText;
  	@UiField
  	OMSVGTextElement endText;
  	@UiField
  	Button endButton;
  	@UiField
  	Button beginButton;
  	
  	Timer beginTimer = new Timer() {
  		@Override
  		public void run() {
  			setTextColor(beginText, SVGConstants.CSS_WHITE_VALUE);
  		}
  	};
  	Timer endTimer = new Timer() {
  		@Override
  		public void run() {
  			setTextColor(endText, SVGConstants.CSS_WHITE_VALUE);
  		}
  	};
  
  	@Override
  	public TabLayoutPanel getPanel() {
  		if (tabPanel == null) {
  			tabPanel = binder.createAndBindUi(this);
  			tabPanel.setTabText(0, "Animation");
  			createCodeTabs("SmilSample");
  			
  			// Add the repeat handler manually instead of using the @UiHandler annotation
  			// Indeed, since many browsers do not yet support the SVG anim tag, the
  			// anim variable may well be null
 			OMSVGAnimateElement anim = getAnimation(); 
 			if (anim != null) {
 				anim.addRepeatHandler(this);
 				anim.addBeginHandler(this);
 				anim.addEndHandler(this);
 			}
 		}
 		return tabPanel;
 	}
 	
 	private OMSVGAnimateElement getAnimation() {
 		Iterator<OMSVGAnimateElement> iterator = DOMHelper.evaluateXPath(circle, "svg:animate", SVGPrefixResolver.INSTANCE);
 		if (iterator.hasNext()) {
 			return iterator.next(); 
 		}
 		return null;
 	}
 	
 	@Override
 	public void onRepeat(RepeatEvent e) {
 		OMText loopCount = (OMText) countSpan.getFirstChild();
 		int count = Integer.parseInt(loopCount.getData());
 		loopCount.setData(Integer.toString(count + 1));
 	}
 
 	@Override
 	public void onEnd(EndEvent event) {
 		setTextColor(endText, SVGConstants.CSS_YELLOW_VALUE);
 		endTimer.schedule(200);
 	}
 
 	@Override
 	public void onBegin(BeginEvent event) {
 		setTextColor(beginText, SVGConstants.CSS_YELLOW_VALUE);
 		beginTimer.schedule(200);
 	}
 	
 	private void setTextColor(OMSVGTextElement text, String color) {
 		text.getStyle().setSVGProperty(SVGConstants.CSS_FILL_PROPERTY, color);
 		text.getStyle().setSVGProperty(SVGConstants.CSS_STROKE_PROPERTY, color);
 	}
 	
 	@UiHandler("endButton")
 	public void end(ClickEvent event) {
 		OMSVGAnimateElement anim = getAnimation(); 
 		if (anim != null) {
 			anim.endElement();
 		}
 	}
 	@UiHandler("beginButton")
 	public void begin(ClickEvent event) {
 		OMSVGAnimateElement anim = getAnimation(); 
 		if (anim != null) {
 			anim.beginElement();
 		}
 	}
 
 }