GraphLayout.java

/**
 * 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.ui.layout;

import java.util.List;

import org.eclipse.draw2d.AbstractLayout;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.GraphicalEditPart;

/**
 * @author Riccardo Solmi
 */
public class GraphLayout extends AbstractLayout {
	private GraphicalEditPart containerPart;
	private ILayoutStrategy layoutStrategy;
	
	public GraphLayout(GraphicalEditPart containerPart) {
		this.containerPart = containerPart;
		layoutStrategy = new GraphLayoutStrategy();
	}
	
	protected Dimension calculatePreferredSize(IFigure container, int wHint, int hHint) {
		container.validate();
		List<?> children = container.getChildren();
		Rectangle result = new Rectangle().setLocation(container.getClientArea().getLocation());
		for (int i=0; i<children.size(); i++)
			result.union(((IFigure) children.get(i)).getBounds());
		result.resize(container.getInsets().getWidth(), container.getInsets().getHeight());
		return result.getSize();
	}

	public void layout(IFigure container) {
		layoutStrategy.layout(containerPart);
	}
}