/**

  * Back 2 Browser Bytecode Translator

  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

  *

  * 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, version 2 of the License.

  *

  * 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. Look for COPYING file in the top folder.

  * If not, see http://opensource.org/licenses/GPL-2.0.

  */

 package org.apidesign.bck2brwsr.htmlpage.api;

 import net.java.html.canvas.GraphicsContext;

 import net.java.html.canvas.spi.GraphicsUtils;

 import org.apidesign.bck2brwsr.core.JavaScriptBody;

 import org.apidesign.bck2brwsr.htmlpage.HTML5GraphicsEnvironment;

 import static org.apidesign.bck2brwsr.htmlpage.api.Element.getAttribute;

 /**

  *

  * @author Anton Epple <toni.epple@eppleton.de>

  */

 public class Canvas extends Element {

     public Canvas(String id) {

         super(id);

     }

     public void setHeight(int height) {

         setAttribute(this, "height", height);

     }

     public int getHeight() {

        Object ret =  getAttribute(this, "height");

        return (ret instanceof Number) ? ((Number)ret).intValue(): Integer.MIN_VALUE;

     }

     public void setWidth(int width) {

         setAttribute(this, "width", width);

     }

     public int getWidth() {

        Object ret =  getAttribute(this, "width");

        return (ret instanceof Number) ? ((Number)ret).intValue(): Integer.MIN_VALUE;

     }

     @JavaScriptBody(

             args = {"el"},

             body = "var e = window.document.getElementById(el._id());\n"

             + "return e.getContext('2d');\n")

     private native static Object getContextImpl(Canvas el);

     public GraphicsContext getContext() {

         final HTML5GraphicsEnvironment env = new HTML5GraphicsEnvironment(getContextImpl(this), this);

 //        System.err.println("called getContext");

         return GraphicsUtils.create(env);

     }

     @Override

     void dontSubclass() {

     }

 }