| /****************************************************************************** |
| * Copyright (c) 2005, 2008 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| ****************************************************************************/ |
| package org.eclipse.gmf.runtime.diagram.ui.editpolicies; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.gef.EditPart; |
| import org.eclipse.gef.commands.Command; |
| import org.eclipse.gef.commands.CompoundCommand; |
| import org.eclipse.gef.requests.ChangeBoundsRequest; |
| |
| import org.eclipse.gmf.runtime.diagram.ui.editparts.GroupEditPart; |
| import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart; |
| import org.eclipse.gmf.runtime.diagram.ui.requests.ArrangeRequest; |
| import org.eclipse.gmf.runtime.diagram.ui.requests.CreateViewRequest; |
| import org.eclipse.gmf.runtime.diagram.ui.requests.DropObjectsRequest; |
| import org.eclipse.gmf.runtime.diagram.ui.requests.RefreshConnectionsRequest; |
| import org.eclipse.gmf.runtime.diagram.ui.requests.RequestConstants; |
| import org.eclipse.gmf.runtime.emf.core.util.EObjectAdapter; |
| |
| |
| /** |
| * Supports droping model elements onto the shape compartment editpart. |
| * @author mhanner |
| */ |
| public class ShapeCompartmentDropEditPolicy |
| extends DragDropEditPolicy { |
| |
| /** |
| * Overriden to ensure that we don't drag the top level shape inside the shape compartment itself since this precipitates |
| * difficult movement behavior of the top level shape. |
| * |
| * @see org.eclipse.gmf.runtime.diagram.ui.editpolicies.DragDropEditPolicy#getDropCommand(org.eclipse.gef.requests.ChangeBoundsRequest) |
| */ |
| protected Command getDropCommand(ChangeBoundsRequest request) { |
| List editparts = request.getEditParts(); |
| if (editparts.size() == 1) { |
| Object obj = editparts.get(0); |
| if (obj instanceof EditPart) { |
| EditPart requestEP = (EditPart)obj; |
| if (getHost() instanceof IGraphicalEditPart) { |
| IGraphicalEditPart gep = (IGraphicalEditPart)getHost(); |
| if (gep.getTopGraphicEditPart().equals(requestEP)) { |
| return null; |
| } else if (requestEP.getParent() instanceof GroupEditPart) { |
| // Dragging shapes outside the group will cause the |
| // group to grow and thus should not reparent. |
| return null; |
| } |
| } |
| } |
| } |
| |
| return super.getDropCommand(request); |
| } |
| |
| /** |
| * Returns a command to create a view for each of the elements defined |
| * in the supplied request. |
| */ |
| protected Command getDropObjectsCommand(DropObjectsRequest dropRequest) { |
| List viewDescriptors = new ArrayList(); |
| Iterator iter = dropRequest.getObjects().iterator(); |
| |
| while (iter.hasNext()) { |
| Object obj = iter.next(); |
| if (obj instanceof EObject) { |
| viewDescriptors.add(new CreateViewRequest.ViewDescriptor( |
| new EObjectAdapter((EObject) obj), |
| ((IGraphicalEditPart) getHost()) |
| .getDiagramPreferencesHint())); |
| } |
| } |
| |
| CreateViewRequest createViewRequest = |
| new CreateViewRequest(viewDescriptors); |
| createViewRequest.setLocation(dropRequest.getLocation()); |
| Command createCommand = getHost().getCommand(createViewRequest); |
| |
| if (createCommand != null) { |
| List result = (List)createViewRequest.getNewObject(); |
| dropRequest.setResult(result); |
| |
| RefreshConnectionsRequest refreshRequest = |
| new RefreshConnectionsRequest(result); |
| Command refreshCommand = getHost().getCommand(refreshRequest); |
| |
| ArrangeRequest arrangeRequest = |
| new ArrangeRequest(RequestConstants.REQ_ARRANGE_DEFERRED); |
| arrangeRequest.setViewAdaptersToArrange(result); |
| Command arrangeCommand = getHost().getCommand(arrangeRequest); |
| |
| CompoundCommand cc = new CompoundCommand(createCommand.getLabel()); |
| cc.add(createCommand.chain(refreshCommand)); |
| cc.add(arrangeCommand); |
| |
| return cc; |
| } |
| return null; |
| |
| } |
| } |