1) Fixed issue #858: OpenPHPPerspectiveAction error when creating a new PHP project.
[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpdt / internal / ui / dnd / JdtViewerDragAdapter.java
1 /*******************************************************************************
2  * Copyright (c) 2000, 2003 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials 
4  * are made available under the terms of the Common Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/cpl-v10.html
7  * 
8  * Contributors:
9  *     IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package net.sourceforge.phpdt.internal.ui.dnd;
12
13 //incastrix
14 //import org.eclipse.jface.text.Assert;
15 import org.eclipse.core.runtime.Assert;
16 import org.eclipse.jface.viewers.IStructuredSelection;
17 import org.eclipse.jface.viewers.StructuredViewer;
18 import org.eclipse.swt.dnd.DragSourceEvent;
19
20 public class JdtViewerDragAdapter extends DelegatingDragAdapter {
21
22         private StructuredViewer fViewer;
23
24         public JdtViewerDragAdapter(StructuredViewer viewer,
25                         TransferDragSourceListener[] listeners) {
26                 super(listeners);
27                 Assert.isNotNull(viewer);
28                 fViewer = viewer;
29         }
30
31         public void dragStart(DragSourceEvent event) {
32                 IStructuredSelection selection = (IStructuredSelection) fViewer
33                                 .getSelection();
34                 if (selection.isEmpty()) {
35                         event.doit = false;
36                         return;
37                 }
38                 super.dragStart(event);
39         }
40 }