/**

 * 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() {

    }

}