| /******************************************************************************* |
| * Copyright (c) 2020 Christian Pontesegger and others. |
| * 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 |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Christian Pontesegger - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ease.ui.view; |
| |
| import org.eclipse.ease.debugging.model.EaseDebugLastExecutionResult; |
| import org.eclipse.ease.debugging.model.EaseDebugVariable; |
| import org.eclipse.jface.util.LocalSelectionTransfer; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.swt.dnd.DragSourceEvent; |
| import org.eclipse.swt.dnd.DragSourceListener; |
| import org.eclipse.swt.dnd.TextTransfer; |
| |
| public class VariablesDragListener implements DragSourceListener { |
| |
| private final TreeViewer fTreeViewer; |
| |
| public VariablesDragListener(final TreeViewer viewer) { |
| fTreeViewer = viewer; |
| } |
| |
| @Override |
| public void dragStart(final DragSourceEvent event) { |
| final Object element = getSelection().getFirstElement(); |
| |
| event.doit = (element instanceof EaseDebugVariable) && !(element instanceof EaseDebugLastExecutionResult); |
| } |
| |
| @Override |
| public void dragSetData(final DragSourceEvent event) { |
| |
| if (LocalSelectionTransfer.getTransfer().isSupportedType(event.dataType)) { |
| LocalSelectionTransfer.getTransfer().setSelection(getSelection()); |
| |
| } else if (TextTransfer.getInstance().isSupportedType(event.dataType)) { |
| |
| final Object firstElement = getSelection().getFirstElement(); |
| if (firstElement instanceof EaseDebugVariable) |
| event.data = ((EaseDebugVariable) firstElement).getName(); |
| } |
| } |
| |
| protected IStructuredSelection getSelection() { |
| return fTreeViewer.getStructuredSelection(); |
| } |
| |
| @Override |
| public void dragFinished(final DragSourceEvent event) { |
| // nothing to do |
| } |
| } |