/*******************************************************************************
 * 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.element.handler.impl;

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

import org.simantics.g2d.element.ElementUtils;
import org.simantics.g2d.element.IElement;
import org.simantics.g2d.element.SceneGraphNodeKey;
import org.simantics.g2d.element.handler.InternalSize;
import org.simantics.g2d.element.handler.SceneGraph;
import org.simantics.g2d.element.handler.Text;
import org.simantics.scenegraph.Node;
import org.simantics.scenegraph.g2d.G2DParentNode;
import org.simantics.scenegraph.g2d.nodes.TextNode;
import org.simantics.utils.datastructures.hints.IHintContext.Key;

/**
 * @author Toni Kalajainen
 */
public class TextPainter implements SceneGraph {

    /**
     * 
     */
    private static final long serialVersionUID = -4156239790629253738L;
    
    static final Font FONT = Font.decode("Arial 6");

    public static final Key SG_NODE = new SceneGraphNodeKey(Node.class, "SUB_SG_NODE");

    @Override
    public void cleanup(IElement e) {
        Node node = e.removeHint(SG_NODE);
        if (node != null)
            node.remove();
    }

    @Override
    public void init(IElement e, G2DParentNode parent) {
        TextNode node = (TextNode) e.getHint(SG_NODE);
        if (node == null) {
            node = parent.addNode(TextNode.class);
            e.setHint(SG_NODE, node);
        }

        Color bc = ElementUtils.getTextColor(e, Color.BLACK);
        InternalSize b = e.getElementClass().getSingleItem(InternalSize.class);
        Rectangle2D r = b.getBounds(e, null);
        if (r ==  null)
            return;
        Text t = e.getElementClass().getAtMostOneItemOfClass(Text.class);
        if (t == null)
            return;
        String text = t.getText(e);
        if (text == null)
            return;
        AffineTransform at = ElementUtils.getTransform(e);
        
        node.setFont(FONT);
        node.setColor(bc);
        node.setBounds(r);
        node.setText(text);
        node.setTransform(at);
    }

}