/**
 * 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.xsi.ui.figures;

import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.ConnectionAnchor;
import org.eclipse.draw2d.Graphics;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.Label;
import org.eclipse.draw2d.MarginBorder;
import org.eclipse.draw2d.geometry.Point;
import org.whole.lang.ui.figures.AnchorFactory;
import org.whole.lang.ui.figures.EntityFigure;
import org.whole.lang.ui.figures.LabelFactory;
import org.whole.lang.ui.figures.NodeFigure;
import org.whole.lang.ui.layout.ColumnLayout;
import org.whole.lang.ui.layout.RowLayout;
import org.whole.lang.ui.notations.figures.DrawUtils;

/** 
 * @author Enrico Persiani, Riccardo Solmi
 */
public class XsiDataElementFigure extends NodeFigure {
	protected Label label;

	public XsiDataElementFigure(boolean startOpened, Label label) {
		setLayoutManager(new ColumnLayout());
		initContentPanes(1);

		EntityFigure topFigure = new EntityFigure(new RowLayout().withSpacing(4));
		topFigure.add(createFoldingToggle(0));

		topFigure.add(this.label = label);

		add(topFigure);
		IFigure contentPane = createContentPane(0, LabelFactory.createIdentifier());
		contentPane.setBorder(new MarginBorder(4, 16, 0, 4));
		add(contentPane);
	}

	
	@Override
	protected ConnectionAnchor[] createTargetAnchors() {
		return new ConnectionAnchor[] {
				AnchorFactory.createFixedAnchor(getFoldingToggle(0), 0, 0.5)
		};
	}

	@Override
	protected ConnectionAnchor[] createSourceAnchors() {
		return new ConnectionAnchor[] {
				AnchorFactory.createFixedAnchor(getFoldingToggle(0), 0.5, 1.0)
		};
	}

	@Override
	protected void paintFigure(Graphics graphics) {
		super.paintFigure(graphics);
		paintConnections(graphics);
	}

	private void paintConnections(Graphics graphics) {
		IFigure featureChild = getContentPane(0);

		if (featureChild.isVisible()) {
			Point targetLocation = featureChild.getBounds().getLeft().translate(16, 0);
			featureChild.translateToAbsolute(targetLocation);
			translateToRelative(targetLocation);
	
			Point start = getSourceAnchor(0).getLocation(null);
			translateToRelative(start);
			graphics.setForegroundColor(ColorConstants.lightGray);
			graphics.setLineDash(new int[] {1,1});
			DrawUtils.drawOutline(graphics, start, new Point[] { targetLocation });
		}
	}
}