| /* |
| * Copyright (c) 2007-2009, 2011, 2012 Eike Stepper (Berlin, Germany) 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: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.net4j.buddies.internal.ui.views; |
| |
| import org.eclipse.net4j.buddies.common.IBuddy; |
| import org.eclipse.net4j.buddies.internal.ui.dnd.BuddiesTransfer; |
| import org.eclipse.net4j.util.ui.dnd.DNDDragListener; |
| |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.StructuredViewer; |
| import org.eclipse.swt.dnd.DND; |
| import org.eclipse.swt.dnd.Transfer; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Iterator; |
| |
| /** |
| * @author Eike Stepper |
| */ |
| public class BuddiesDragListener extends DNDDragListener<IBuddy[]> |
| { |
| private static final Transfer[] TRANSFERS = new Transfer[] { BuddiesTransfer.INSTANCE }; |
| |
| protected BuddiesDragListener(StructuredViewer viewer) |
| { |
| super(TRANSFERS, viewer); |
| } |
| |
| @Override |
| protected IBuddy[] getObject(IStructuredSelection selection) |
| { |
| Collection<IBuddy> buddies = new ArrayList<IBuddy>(); |
| for (Iterator<?> it = selection.iterator(); it.hasNext();) |
| { |
| Object element = it.next(); |
| if (element instanceof IBuddy) |
| { |
| IBuddy buddy = (IBuddy)element; |
| buddies.add(buddy); |
| } |
| } |
| |
| if (buddies.isEmpty()) |
| { |
| return null; |
| } |
| |
| return buddies.toArray(new IBuddy[buddies.size()]); |
| } |
| |
| public static void support(StructuredViewer viewer) |
| { |
| viewer.addDragSupport(DND.DROP_MOVE, TRANSFERS, new BuddiesDragListener(viewer)); |
| } |
| } |