| /******************************************************************************* |
| * Copyright (c) 2000, 2017 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 |
| * |
| *******************************************************************************/ |
| package org.eclipse.dltk.internal.ui.dnd; |
| |
| import org.eclipse.jface.util.DelegatingDragAdapter; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.StructuredViewer; |
| import org.eclipse.swt.dnd.DragSourceEvent; |
| |
| public class DLTKViewerDragAdapter extends DelegatingDragAdapter { |
| |
| private StructuredViewer fViewer; |
| |
| public DLTKViewerDragAdapter(StructuredViewer viewer) { |
| super(); |
| fViewer= viewer; |
| } |
| |
| @Override |
| public void dragStart(DragSourceEvent event) { |
| IStructuredSelection selection= (IStructuredSelection)fViewer.getSelection(); |
| if (selection.isEmpty()) { |
| event.doit= false; |
| return; |
| } |
| super.dragStart(event); |
| } |
| } |