| /******************************************************************************* |
| * Copyright (c) 2014 Bernhard Wedl 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/ |
| * |
| * Contributors: |
| * Bernhard Wedl - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ease.ui.modules.ui; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Method; |
| |
| import org.eclipse.core.runtime.IPath; |
| import org.eclipse.ease.modules.ModuleDefinition; |
| import org.eclipse.ease.tools.StringTools; |
| import org.eclipse.ease.ui.modules.ui.ModulesTools.ModuleEntry; |
| import org.eclipse.jface.util.LocalSelectionTransfer; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.jface.viewers.TableViewer; |
| 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 ModulesDragListener implements DragSourceListener { |
| |
| private final TreeViewer fTreeViewer; |
| private final TableViewer fTableViewer; |
| |
| public ModulesDragListener(final TreeViewer viewer) { |
| fTreeViewer = viewer; |
| fTableViewer = null; |
| } |
| |
| public ModulesDragListener(final TableViewer viewer) { |
| fTableViewer = viewer; |
| fTreeViewer = null; |
| } |
| |
| @Override |
| public void dragStart(final DragSourceEvent event) { |
| event.doit = !(event.data instanceof IPath); |
| } |
| |
| @Override |
| public void dragSetData(final DragSourceEvent event) { |
| |
| if (LocalSelectionTransfer.getTransfer().isSupportedType(event.dataType)) { |
| LocalSelectionTransfer.getTransfer().setSelection(getSelection()); |
| |
| } else if (TextTransfer.getInstance().isSupportedType(event.dataType)) { |
| |
| Object firstElement = getSelection().getFirstElement(); |
| |
| // unpack field/method |
| if (firstElement instanceof ModuleEntry) |
| firstElement = ((ModuleEntry<?>) firstElement).getEntry(); |
| |
| final StringBuilder data = new StringBuilder(); |
| |
| if (firstElement instanceof ModuleDefinition) |
| data.append("loadModule('").append(((ModuleDefinition) firstElement).getPath().toString()).append("');" + StringTools.LINE_DELIMITER); |
| |
| else if (firstElement instanceof Field) |
| data.append(((Field) firstElement).getName()); |
| |
| else if (firstElement instanceof Method) |
| data.append(ModulesTools.getSignature((Method) firstElement, false)).append(";" + StringTools.LINE_DELIMITER); |
| |
| event.data = data.toString(); |
| } |
| } |
| |
| protected IStructuredSelection getSelection() { |
| if (fTreeViewer != null) |
| return fTreeViewer.getStructuredSelection(); |
| |
| if (fTableViewer != null) |
| return fTableViewer.getStructuredSelection(); |
| |
| return StructuredSelection.EMPTY; |
| } |
| |
| @Override |
| public void dragFinished(final DragSourceEvent event) { |
| // nothing to do |
| } |
| } |