| /****************************************************************************** |
| * Copyright (c) 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 org.eclipse.gef.ConnectionEditPart; |
| import org.eclipse.gef.EditPart; |
| import org.eclipse.gef.commands.Command; |
| import org.eclipse.gef.commands.UnexecutableCommand; |
| import org.eclipse.gef.requests.ReconnectRequest; |
| import org.eclipse.gmf.runtime.diagram.ui.editparts.NoteEditPart; |
| import org.eclipse.gmf.runtime.diagram.ui.editpolicies.NotationConnectionReorientEditPolicy; |
| import org.eclipse.gmf.runtime.diagram.ui.internal.editparts.NoteAttachmentEditPart; |
| |
| /** |
| * This editpolicy disables reorienting of note attachments between two nodes |
| * when neither is a note. |
| * |
| * @author Cherie Revells |
| */ |
| public class NoteAttachmentReorientEditPolicy |
| extends NotationConnectionReorientEditPolicy { |
| |
| protected Command getReorientConnectionSourceCommand( |
| ReconnectRequest request) { |
| |
| ConnectionEditPart connectionEP = request.getConnectionEditPart(); |
| if (connectionEP instanceof NoteAttachmentEditPart |
| && !isValidNoteAttachmentReorient(request.getTarget(), connectionEP.getTarget())) { |
| return UnexecutableCommand.INSTANCE; |
| } |
| return super.getReorientConnectionSourceCommand(request); |
| } |
| |
| protected Command getReorientConnectionTargetCommand( |
| ReconnectRequest request) { |
| |
| ConnectionEditPart connectionEP = request.getConnectionEditPart(); |
| if (connectionEP instanceof NoteAttachmentEditPart |
| && !isValidNoteAttachmentReorient(connectionEP.getSource(), request.getTarget())) { |
| return UnexecutableCommand.INSTANCE; |
| } |
| return super.getReorientConnectionSourceCommand(request); |
| |
| } |
| |
| /** |
| * Checks if the connection reorient is valid between the given source and target. |
| * @param sourceEditPart |
| * @param targetEditPart |
| * @return true if the connection reorient is valid; false otherwise |
| */ |
| private boolean isValidNoteAttachmentReorient(EditPart sourceEditPart, |
| EditPart targetEditPart) { |
| if (sourceEditPart instanceof NoteEditPart |
| || targetEditPart instanceof NoteEditPart) { |
| return true; |
| } |
| return false; |
| } |
| } |