/**
 * Copyright 2004-2016 Riccardo Solmi. All rights reserved.
 * This file is part of the Whole Platform.
 *
 * The Whole Platform is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The Whole Platform 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
 */
package org.whole.lang.frames.ui.figures;

import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.Graphics;
import org.eclipse.draw2d.geometry.Rectangle;
import org.whole.lang.ui.WholeImages;
import org.whole.lang.ui.figures.ContentPaneFigure;
import org.whole.lang.ui.figures.EntityFigure;
import org.whole.lang.ui.figures.EntityToggle;
import org.whole.lang.ui.layout.Alignment;
import org.whole.lang.ui.layout.RowLayout;

/**
 * @author Riccardo Solmi
 */
public class JoinPointFigure extends ContentPaneFigure {
	protected EntityFigure headerFigure;

	public JoinPointFigure() {
		super(new RowLayout() {
			@Override
			protected boolean calculateChildrenSize(int wHint, int hHint, boolean preferred) {
				boolean result = super.calculateChildrenSize(wHint, hHint, preferred);
				if (childFigure[0].isVisible()) {
					int figHeight = figAscent+figDescent;
					figAscent = ascent(0);
					figDescent = figHeight - figAscent;
				}
				return result;
			};
		}.withMinorAlignment(Alignment.LEADING).withSpacing(1));
		initContentPanes(2);

		headerFigure = new EntityFigure(new RowLayout() {
			@Override
			protected boolean calculateChildrenSize(int wHint, int hHint, boolean preferred) {
				boolean result = super.calculateChildrenSize(wHint, hHint, preferred);
				int figHeight = figAscent+figDescent;
				figAscent = ascent(0);
				figDescent = figHeight - figAscent;
				return result;
			};
		}.withMinorAlignment(Alignment.LEADING)
			.withSpacing(2).withMarginTop(1).withMarginBottom(1).withMarginRight(3));
		headerFigure.add(createFoldingToggle(new EntityToggle(WholeImages.ARROW_COLLAPSE, WholeImages.ARROW_EXPAND), 0));
		headerFigure.add(createContentPane(0));

		add(createContentPane(1));
		add(headerFigure);

		clickFoldingToggle(0);
	}

	public void paintFigure(Graphics g) {
        super.paintFigure(g);
        
    	Rectangle hr = headerFigure.getBounds();
       	Rectangle cr = getContentPane(1).getBounds();

    	g.setForegroundColor(ColorConstants.lightGreen);
    	g.setBackgroundColor(ColorConstants.lightGreen);

    	int oldAlpha = g.getAlpha();
		g.setAlpha(100);
        g.fillRoundRectangle(hr, 4, 6);
        g.setAlpha(oldAlpha);

        g.drawLine(hr.x, hr.y, hr.x, hr.y+Math.max(hr.height, cr.height));
	}
}