/******************************************************************************* * Copyright (c) 2000, 2003 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Common Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/cpl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ package net.sourceforge.phpdt.internal.ui.dnd; //incastrix //import org.eclipse.jface.text.Assert; import org.eclipse.core.runtime.Assert; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.StructuredViewer; import org.eclipse.swt.dnd.DragSourceEvent; public class JdtViewerDragAdapter extends DelegatingDragAdapter { private StructuredViewer fViewer; public JdtViewerDragAdapter(StructuredViewer viewer, TransferDragSourceListener[] listeners) { super(listeners); Assert.isNotNull(viewer); fViewer = viewer; } public void dragStart(DragSourceEvent event) { IStructuredSelection selection = (IStructuredSelection) fViewer .getSelection(); if (selection.isEmpty()) { event.doit = false; return; } super.dragStart(event); } }