/** | |
* Copyright (c) 2016 Mia-Software. | |
* All rights reserved. This program and the accompanying materials | |
* are made available under the terms of the Eclipse Public License v2.0 | |
* which accompanies this distribution, and is available at | |
* http://www.eclipse.org/legal/epl-v20.html | |
* | |
* Contributors: | |
* Grégoire Dupé (Mia-Software) - Bug 506318 - [New Browser] Drag and drop support | |
*/ | |
package org.eclipse.modisco.infra.browser.editor.ui.internal.editor; | |
import org.eclipse.emf.edit.ui.dnd.LocalTransfer; | |
import org.eclipse.jface.viewers.ISelection; | |
import org.eclipse.jface.viewers.TreeViewer; | |
import org.eclipse.modisco.facet.custom.ui.CustomizedContentProviderUtils; | |
import org.eclipse.swt.dnd.DragSourceEvent; | |
import org.eclipse.swt.dnd.DragSourceListener; | |
public class TreeEditorDragListener implements DragSourceListener { | |
private ISelection selection; | |
private final TreeViewer tree; | |
public TreeEditorDragListener(final TreeViewer tree) { | |
this.tree = tree; | |
} | |
public void dragStart(final DragSourceEvent event) { | |
final ISelection treeSelection = this.tree.getSelection(); | |
this.selection = CustomizedContentProviderUtils | |
.resolveSelection(treeSelection); | |
} | |
public void dragSetData(final DragSourceEvent event) { | |
if (LocalTransfer.getInstance().isSupportedType(event.dataType)) { | |
event.data = this.selection; | |
} | |
} | |
@SuppressWarnings("PMD.NullAssignment") | |
/* | |
* @SuppressWarnings("PMD.NullAssignment"): gdupe> This is the way to | |
* implement a DragSourceListener, cf. | |
* org.eclipse.emf.edit.ui.dnd.ViewerDragAdapter | |
*/ | |
public void dragFinished(final DragSourceEvent event) { | |
this.selection = null; | |
} | |
} |