| /****************************************************************************** |
| * Copyright (c) 2004, 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.internal.editpolicies; |
| |
| import org.eclipse.draw2d.geometry.Point; |
| import org.eclipse.emf.transaction.TransactionalEditingDomain; |
| import org.eclipse.gef.EditPart; |
| import org.eclipse.gef.Request; |
| import org.eclipse.gef.commands.Command; |
| import org.eclipse.gmf.runtime.common.core.command.ICommand; |
| import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy; |
| import org.eclipse.gmf.runtime.diagram.ui.commands.SetBoundsCommand; |
| import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart; |
| import org.eclipse.gmf.runtime.diagram.ui.editparts.LabelEditPart; |
| import org.eclipse.gmf.runtime.diagram.ui.editpolicies.GraphicalNodeEditPolicy; |
| import org.eclipse.gmf.runtime.diagram.ui.l10n.DiagramUIMessages; |
| import org.eclipse.gmf.runtime.diagram.ui.requests.RequestConstants; |
| import org.eclipse.gmf.runtime.emf.core.util.EObjectAdapter; |
| import org.eclipse.gmf.runtime.notation.View; |
| |
| |
| /** |
| * EditPolicy which support the RequestConstants.REQ_SNAP_BACK request type. |
| * |
| * Returns a command to position a label's offset to it default set at creation. |
| * |
| * @author jcorchis |
| */ |
| public class LabelSnapBackEditPolicy |
| extends GraphicalNodeEditPolicy { |
| |
| |
| /** |
| * Understands RequestConstants.REQ_SNAP_BACK request types |
| * @param request |
| * @return boolean |
| */ |
| public boolean understandsRequest(Request request) { |
| return RequestConstants.REQ_SNAP_BACK.equals(request.getType()); |
| } |
| |
| /** |
| * Returns a <code>Command</code> which sets the label's offset to its |
| * original position. |
| * |
| * @param request the request |
| * @return the command |
| */ |
| public Command getCommand(Request request) { |
| if (RequestConstants.REQ_SNAP_BACK.equals(request.getType())) { |
| View view = (View)getHost().getModel(); |
| String hint = view.getType(); |
| Point offset = LabelEditPart.getSnapBackPosition(hint); |
| if (offset == null) |
| return null; |
| |
| TransactionalEditingDomain editingDomain = ((IGraphicalEditPart) getHost()) |
| .getEditingDomain(); |
| |
| ICommand moveCommand = |
| new SetBoundsCommand(editingDomain, |
| DiagramUIMessages.SetLocationCommand_Label_Resize, |
| new EObjectAdapter(view), |
| offset); |
| return new ICommandProxy(moveCommand); |
| } |
| return null; |
| } |
| |
| public EditPart getTargetEditPart(Request request) { |
| if (understandsRequest(request)) |
| return getHost(); |
| return super.getTargetEditPart(request); |
| } |
| } |