| /****************************************************************************** |
| * Copyright (c) 2002, 2007 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.Request; |
| 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.editparts.ListCompartmentEditPart; |
| 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; |
| |
| /** |
| * @author choang |
| * |
| * Default edit policy to handle request of type <code>org.eclipse.gmf.runtime.diagram.ui.internal.requests.DropElementsRequest;<code>. |
| * The default behavior will to Create a CreateViewRequest. |
| */ |
| public class DiagramDragDropEditPolicy extends DragDropEditPolicy { |
| |
| /** |
| * getDropFileCommand |
| * Handler method for the dropRequest as a result of a file transfer drag / drop operation. |
| * @param dropRequest DropObjectsRequest that contains a list of Strings in it's objects list. |
| * @return Command that that create the resulting view of the file if any, null otherwise. |
| */ |
| protected Command getDropFileCommand(DropObjectsRequest dropRequest) { |
| Iterator iter = dropRequest.getObjects().iterator(); |
| while (iter.hasNext()) { |
| Object obj = iter.next(); |
| if (obj instanceof String) { |
| //String filePath = (String)obj; |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * @see org.eclipse.gef.EditPolicy#getCommand(Request) |
| */ |
| public Command getDropObjectsCommand(DropObjectsRequest dropRequest) { |
| // Create a view request from the drop request and then forward getting |
| // the command for that. |
| |
| List viewDescriptors = new ArrayList(); |
| Iterator iter = dropRequest.getObjects().iterator(); |
| |
| if (dropRequest.getObjects().size() > 0 && |
| dropRequest.getObjects().get(0) instanceof String) { |
| return getDropFileCommand(dropRequest); |
| } |
| |
| while (iter.hasNext()) |
| viewDescriptors.add(new CreateViewRequest.ViewDescriptor( |
| new EObjectAdapter((EObject) iter.next()), |
| ((IGraphicalEditPart) getHost()).getDiagramPreferencesHint())); |
| |
| return createViewsAndArrangeCommand(dropRequest, viewDescriptors); |
| } |
| |
| /** |
| * createViewsAndArrangeCommand |
| * Method to create all the view based on the viewDescriptors list and provide |
| * a default arrangement of them. |
| * |
| * @param dropRequest |
| * @param viewDescriptors |
| * @return command |
| */ |
| protected Command createViewsAndArrangeCommand(DropObjectsRequest dropRequest, List viewDescriptors) { |
| 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; |
| } |
| |
| /** |
| * @see org.eclipse.gef.EditPolicy#showTargetFeedback(org.eclipse.gef.Request) |
| */ |
| public void showTargetFeedback(Request request) { |
| // no feedback for the diagram |
| } |
| |
| /** |
| * Handles dropping attributes from a class to the diagram to show as an |
| * association. |
| * @see org.eclipse.gmf.runtime.diagram.ui.editpolicies.DragDropEditPolicy#getDropCommand(org.eclipse.gef.requests.ChangeBoundsRequest) |
| */ |
| protected Command getDropCommand(ChangeBoundsRequest request) { |
| if (request.getEditParts().size() > 0) { |
| EditPart parentEP = |
| ((IGraphicalEditPart) request.getEditParts().get(0)).getParent(); |
| if (parentEP instanceof ListCompartmentEditPart) { |
| Object originalType = request.getType(); |
| request.setType(RequestConstants.REQ_SHOW_AS_ALTERNATE_VIEW); |
| Command cmd = parentEP.getCommand(request); |
| request.setType(originalType); |
| if (cmd != null) { |
| return cmd; |
| } |
| } else if (parentEP instanceof GroupEditPart) { |
| // Dragging shapes outside the group will cause the group to |
| // grow and thus should not reparent. |
| return null; |
| } |
| } |
| return super.getDropCommand(request); |
| } |
| |
| } |