/*******************************************************************************
* Copyright (c) 2002, 2008 QNX Software Systems 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:
* QNX Software Systems - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.ui.dnd;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.swt.dnd.DragSourceEvent;
/**
* CDTViewerDragAdapter
*/
public class CDTViewerDragAdapter extends DelegatingDragAdapter {
private StructuredViewer fViewer;
public CDTViewerDragAdapter(StructuredViewer viewer, TransferDragSourceListener[] listeners) {
super(listeners);
Assert.isNotNull(viewer);
fViewer= viewer;
}
@Override
public void dragStart(DragSourceEvent event) {
IStructuredSelection selection= (IStructuredSelection)fViewer.getSelection();
if (selection.isEmpty()) {
event.doit= false;
return;
}
super.dragStart(event);
}
}