XsiCompositeElementNodeFigure.java example

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/**
 * 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.eclipse.draw2d.geometry.Rectangle;
import org.whole.lang.ui.figures.AnchorFactory;
import org.whole.lang.ui.figures.CompositeFigure;
import org.whole.lang.ui.figures.EntityFigure;
import org.whole.lang.ui.figures.INodeFigure;
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 XsiCompositeElementNodeFigure extends NodeFigure {
	protected Label label;

	public XsiCompositeElementNodeFigure(boolean startOpened, Label label) {
		setLayoutManager(new ColumnLayout().withSpacing(4));
		initContentPanes(1);

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

		topFigure.add(this.label = label);

		add(topFigure);
		IFigure contentsContainer = createContentPane(0, new CompositeFigure(false));
		contentsContainer.setBorder(new MarginBorder(0, 16, 0, 0));
		add(contentsContainer);

		if (!startOpened)
	    	clickFoldingToggle(0);
	}

	@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);
	}

	protected void paintConnections(Graphics graphics) {
		IFigure contentsFigure = getContentPane(getContentPanesSize()-1);
		int compositeChildrenNumber = contentsFigure.getChildren().size();
		if (compositeChildrenNumber == 0)
			return;
		Point[] childs = new Point[compositeChildrenNumber];
		for (int i=0; i<compositeChildrenNumber; i++) {
			IFigure compositeChild = (IFigure) contentsFigure.getChildren().get(i);

			// calculate target point position
			Point targetLocation;
			if (compositeChild instanceof INodeFigure)
				targetLocation = ((INodeFigure) compositeChild).getTargetAnchor(0).getLocation(null);
			else {
				Rectangle compositeChildBounds = compositeChild.getBounds();
				targetLocation = compositeChildBounds.getLeft();
				compositeChild.translateToAbsolute(targetLocation);
			}
			translateToRelative(targetLocation);
			childs[i] = targetLocation;
		}
		Point start = getSourceAnchor(0).getLocation(null);
		translateToRelative(start);
		graphics.setForegroundColor(ColorConstants.lightGray);
		graphics.setLineDash(new int[] {1,1});
		DrawUtils.drawOutline(graphics, start, childs);
	}
}