| /****************************************************************************** |
| * Copyright (c) 2004, 2006 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.internal.editpolicies; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.emf.transaction.TransactionalEditingDomain; |
| import org.eclipse.gef.Request; |
| import org.eclipse.gef.commands.Command; |
| import org.eclipse.gmf.runtime.diagram.core.internal.commands.CreateDiagramLinkCommand; |
| import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy; |
| import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart; |
| import org.eclipse.gmf.runtime.diagram.ui.editpolicies.DragDropEditPolicy; |
| import org.eclipse.gmf.runtime.diagram.ui.l10n.DiagramUIMessages; |
| import org.eclipse.gmf.runtime.diagram.ui.requests.DropObjectsRequest; |
| import org.eclipse.gmf.runtime.diagram.ui.requests.RequestConstants; |
| import org.eclipse.gmf.runtime.notation.Diagram; |
| import org.eclipse.gmf.runtime.notation.View; |
| import org.eclipse.swt.dnd.DND; |
| |
| /** |
| * Edit Policy which supports dropping NalDiagramView onto shapes. The host's |
| * semantic model get sets to the dropped diagram. |
| * |
| * @author jcorchis |
| * @canBeSeenBy %level1 |
| */ |
| public class DiagramLinkDragDropEditPolicy extends DragDropEditPolicy { |
| |
| /** |
| * @see org.eclipse.gmf.runtime.diagram.ui.editpolicies.DragDropEditPolicy#getCommand(DropElementsRequest) |
| */ |
| public Command getDropObjectsCommand(DropObjectsRequest request) { |
| |
| // Return the non-null command if the dropped selection contains at least |
| // one diagram element. |
| if (RequestConstants.REQ_DROP_OBJECTS.equals(request.getType())) { |
| DropObjectsRequest elements = request; |
| Iterator i = elements.getObjects().iterator(); |
| while (i.hasNext()) { |
| Object element = i.next(); |
| if (element instanceof Diagram) { |
| |
| Diagram diagram = (Diagram) element; |
| View view = (View)getHost().getModel(); |
| |
| |
| TransactionalEditingDomain editingDomain = ((IGraphicalEditPart) getHost()) |
| .getEditingDomain(); |
| |
| CreateDiagramLinkCommand com = new CreateDiagramLinkCommand( |
| editingDomain, |
| DiagramUIMessages.Command_CreateDiagramLink, view, |
| diagram); |
| |
| return new ICommandProxy(com); |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * @see org.eclipse.gmf.runtime.diagram.ui.editpolicies.DragDropEditPolicy#understandsRequest() |
| */ |
| public boolean understandsRequest(Request request) { |
| if (RequestConstants.REQ_DROP_OBJECTS.equals(request.getType())) { |
| List elements = ((DropObjectsRequest) request).getObjects(); |
| return elements.size() == 1 && elements.get(0) instanceof Diagram; |
| } |
| return super.understandsRequest(request); |
| |
| } |
| |
| /** |
| * @see org.eclipse.gef.EditPolicy#showTargetFeedback(org.eclipse.gef.Request) |
| */ |
| public void showTargetFeedback(Request request) { |
| if (understandsRequest(request)) |
| super.showTargetFeedback(request); |
| } |
| |
| /** |
| * @see org.eclipse.gmf.runtime.diagram.ui.editpolicies.DragDropEditPolicy#getDragOperation(org.eclipse.gef.Request) |
| */ |
| protected int getRequiredDragDetail(Request request) { |
| if (request instanceof DropObjectsRequest){ |
| DropObjectsRequest req = (DropObjectsRequest) request; |
| if ((req.getAllowedDetail() & DND.DROP_LINK) != 0) |
| return DND.DROP_LINK; |
| return DND.DROP_COPY; |
| } |
| return super.getRequiredDragDetail(request); |
| } |
| |
| } |