| //------------------------------------------------------------------------------ |
| // Copyright (c) 2005, 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 implementation |
| //------------------------------------------------------------------------------ |
| package org.eclipse.epf.authoring.gef.commands; |
| |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.epf.authoring.gef.util.DiagramUIResources; |
| import org.eclipse.epf.authoring.ui.AuthoringUIPlugin; |
| import org.eclipse.epf.common.ui.util.MsgBox; |
| import org.eclipse.epf.diagram.model.Diagram; |
| import org.eclipse.epf.library.edit.ui.UserInteractionHelper; |
| import org.eclipse.gef.commands.Command; |
| |
| /** |
| * @author Phong Nguyen Le |
| * @since 1.0 |
| */ |
| public abstract class DiagramModifyCommand extends Command { |
| |
| private EObject object; |
| |
| private boolean canUndo = true; |
| |
| public DiagramModifyCommand(String label) { |
| super(label); |
| } |
| |
| protected void setDiagram(Diagram diagram) { |
| Object obj = diagram.getObject(); |
| if (obj instanceof EObject) { |
| object = (EObject) obj; |
| } |
| } |
| |
| protected boolean prepareExecute() { |
| IStatus status = UserInteractionHelper.checkModify(object, MsgBox.getDefaultShell()); |
| if (status.isOK()) { |
| return true; |
| } else { |
| AuthoringUIPlugin.getDefault().getMsgDialog() |
| .displayWarning( |
| DiagramUIResources.errorDialog_title, |
| DiagramUIResources.command_cannotEdit, |
| status); |
| return false; |
| } |
| } |
| |
| /** |
| * @see org.eclipse.gef.commands.Command#execute() |
| */ |
| public void execute() { |
| if (prepareExecute()) { |
| doExecute(); |
| canUndo = true; |
| } else { |
| canUndo = false; |
| } |
| } |
| |
| /** |
| * @see org.eclipse.gef.commands.Command#canUndo() |
| */ |
| public boolean canUndo() { |
| return canUndo; |
| } |
| |
| protected abstract void doExecute(); |
| |
| } |