| /******************************************************************************* |
| * Copyright (c) 2000, 2010 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 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.gef.ui.parts; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.swt.dnd.DragSourceEvent; |
| import org.eclipse.swt.dnd.Transfer; |
| |
| import org.eclipse.jface.viewers.StructuredSelection; |
| |
| import org.eclipse.gef.EditPart; |
| import org.eclipse.gef.EditPartViewer; |
| import org.eclipse.gef.dnd.AbstractTransferDragSourceListener; |
| |
| class TreeViewerTransferDragListener extends AbstractTransferDragSourceListener { |
| |
| private List modelSelection; |
| |
| public TreeViewerTransferDragListener(EditPartViewer viewer) { |
| super(viewer, TreeViewerTransfer.getInstance()); |
| } |
| |
| /** |
| * @deprecated |
| */ |
| public TreeViewerTransferDragListener(EditPartViewer viewer, Transfer xfer) { |
| super(viewer, xfer); |
| } |
| |
| public void dragSetData(DragSourceEvent event) { |
| event.data = getViewer().getSelectedEditParts(); |
| } |
| |
| public void dragStart(DragSourceEvent event) { |
| TreeViewerTransfer.getInstance().setViewer(getViewer()); |
| List selection = getViewer().getSelectedEditParts(); |
| TreeViewerTransfer.getInstance().setObject(selection); |
| saveModelSelection(selection); |
| } |
| |
| public void dragFinished(DragSourceEvent event) { |
| TreeViewerTransfer.getInstance().setObject(null); |
| TreeViewerTransfer.getInstance().setViewer(null); |
| if (event.doit) |
| revertModelSelection(); |
| else |
| modelSelection = null; |
| } |
| |
| protected void revertModelSelection() { |
| List list = new ArrayList(); |
| Object editpart; |
| for (int i = 0; i < modelSelection.size(); i++) { |
| editpart = getViewer().getEditPartRegistry().get( |
| modelSelection.get(i)); |
| if (editpart != null) |
| list.add(editpart); |
| } |
| getViewer().setSelection(new StructuredSelection(list)); |
| modelSelection = null; |
| } |
| |
| protected void saveModelSelection(List editPartSelection) { |
| modelSelection = new ArrayList(); |
| for (int i = 0; i < editPartSelection.size(); i++) { |
| EditPart editpart = (EditPart) editPartSelection.get(i); |
| modelSelection.add(editpart.getModel()); |
| } |
| } |
| |
| } |