/*******************************************************************************
 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
 * in Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.g2d.example;

import java.awt.Color;
import java.awt.geom.Rectangle2D;

import org.simantics.g2d.canvas.ICanvasContext;
import org.simantics.g2d.diagram.DiagramClass;
import org.simantics.g2d.diagram.DiagramHints;
import org.simantics.g2d.diagram.IDiagram;
import org.simantics.g2d.diagram.impl.Diagram;
import org.simantics.g2d.element.ElementClass;
import org.simantics.g2d.element.ElementUtils;
import org.simantics.g2d.element.IElement;
import org.simantics.g2d.element.handler.Heartbeat;
import org.simantics.g2d.element.handler.Text;
import org.simantics.g2d.element.handler.impl.DefaultTransform;
import org.simantics.g2d.element.handler.impl.FixedSize;
import org.simantics.g2d.element.handler.impl.TextColorImpl;
import org.simantics.g2d.element.handler.impl.TextPainter;
import org.simantics.g2d.element.impl.Element;
import org.simantics.g2d.elementclass.FilmClass;

/**
 * Diagram with LOADING... text
 * 
 * @author Toni Kalajainen
 */
public class LoadingMessageDiagram {

    public static final ElementClass LOADING_CLASS =
        ElementClass.compile(
                TextColorImpl.WHITE,
                DefaultTransform.INSTANCE,
                FixedSize.of(30, 20),
                Text.INSTANCE,
                new TextPainter(),
                new LoadingAnimation()
        );

    public static final IDiagram LOADING_DIAGRAM = createLoadingDiagram();

    /**
     * Create diagram where flashing "LOADING" text
     * @return
     */
    public static IDiagram createLoadingDiagram()
    {
        String name = "Loading...";
        IDiagram d = Diagram.spawnNew(DiagramClass.DEFAULT);
        d.setHint(DiagramHints.KEY_TEXT, name);

        IElement film = Element.spawnNew(FilmClass.FILM_CLASS);
        ElementUtils.fitToRectangle(film, new Rectangle2D.Double(0, 4, 40, 30));
        d.addElement(film);
        ElementUtils.setFillColor(film, new Color(0.3f, 0.3f, 0.8f, 0.5f));

        IElement lbl = Element.spawnNew( LOADING_CLASS );
        d.addElement(lbl);
        ElementUtils.setPos(lbl, 5,7);
        ElementUtils.setText(lbl, "Loading");
        ElementUtils.setTextColor(lbl, Color.WHITE);

        return d;
    }



    private static class LoadingAnimation implements Heartbeat {

        private static final long serialVersionUID = 2721735864087380222L;

        @Override
        public void heartbeat(IElement e, long time, long deltaTime, ICanvasContext ctx) {
            int dotCount = (int) ((time % 1000L) / 200L);
            String dots = "";
            for (int i=0; i<dotCount; i++)
                dots += ".";
            ElementUtils.setText(e, "Loading"+dots);

            ctx.getContentContext().setDirty();
        }

    }

}