org.eclipse.fmc.blockdiagram.editor/src/org/eclipse/fmc/blockdiagram/editor/features/DeepRemoveFeature.java

/*******************************************************************************
 * <copyright>
 *
 * Copyright (c) 2013, 2013 SAP AG.
 * 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:
 *    SAP AG - initial API, implementation and documentation
 *
 * </copyright>
 *
 *******************************************************************************/
package org.eclipse.fmc.blockdiagram.editor.features;

import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.context.IRemoveContext;
import org.eclipse.graphiti.features.impl.DefaultRemoveFeature;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
import org.eclipse.graphiti.mm.pictograms.PictogramElement;
import org.eclipse.graphiti.mm.pictograms.Shape;

/**
 * This Remove feature removes all connections including those that are pointing
 * to/from child shapes.
 * 
 * @author Benjamin Schmeling
 * 
 */
public class DeepRemoveFeature extends DefaultRemoveFeature {

	/**
	 * Main constructor.
	 * 
	 * @param featureProvider
	 *            The feature provider.
	 */
	public DeepRemoveFeature(IFeatureProvider featureProvider) {
		super(featureProvider);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.graphiti.features.impl.DefaultRemoveFeature#preRemove(org
	 * .eclipse.graphiti.features.context.IRemoveContext)
	 */
	@Override
	public void preRemove(IRemoveContext context) {
		PictogramElement pe = context.getPictogramElement();

		if (pe instanceof ContainerShape) {
			removeConnectionsFromAllChildren((ContainerShape) pe);
		}
		super.postRemove(context);
	}

	/**
	 * Removes connections from all the children of the container.
	 * 
	 * @param container
	 *            The container shape to remove the children from.
	 */
	private void removeConnectionsFromAllChildren(ContainerShape container) {
		for (Shape shape : (container.getChildren())) {
			removeAllConnections(shape);
			if (shape instanceof ContainerShape) {
				removeConnectionsFromAllChildren((ContainerShape) shape);
			}
		}
	}

}