| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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: |
| * Jesper Kamstrup Linnet (eclipse@kamstrup-linnet.dk) - initial API and implementation |
| * (report 36180: Callers/Callees view) |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.callhierarchy; |
| |
| import org.eclipse.swt.dnd.DND; |
| import org.eclipse.swt.dnd.DropTargetEvent; |
| |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.StructuredViewer; |
| |
| import org.eclipse.jdt.core.IMethod; |
| |
| import org.eclipse.jdt.internal.ui.packageview.SelectionTransferDropAdapter; |
| import org.eclipse.jdt.internal.ui.util.SelectionUtil; |
| |
| class CallHierarchyTransferDropAdapter extends SelectionTransferDropAdapter { |
| |
| private static final int OPERATION = DND.DROP_LINK; |
| private CallHierarchyViewPart fCallHierarchyViewPart; |
| |
| public CallHierarchyTransferDropAdapter(CallHierarchyViewPart viewPart, StructuredViewer viewer) { |
| super(viewer); |
| setFullWidthMatchesItem(false); |
| fCallHierarchyViewPart= viewPart; |
| } |
| |
| public void validateDrop(Object target, DropTargetEvent event, int operation) { |
| event.detail= DND.DROP_NONE; |
| initializeSelection(); |
| if (target != null){ |
| super.validateDrop(target, event, operation); |
| return; |
| } |
| if (getInputElement(getSelection()) != null) |
| event.detail= OPERATION; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jdt.internal.ui.packageview.SelectionTransferDropAdapter#isEnabled(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| public boolean isEnabled(DropTargetEvent event) { |
| return true; |
| } |
| |
| public void drop(Object target, DropTargetEvent event) { |
| if (target != null || event.detail != OPERATION){ |
| super.drop(target, event); |
| return; |
| } |
| IMethod input= getInputElement(getSelection()); |
| fCallHierarchyViewPart.setMethod(input); |
| } |
| |
| private static IMethod getInputElement(ISelection selection) { |
| Object single= SelectionUtil.getSingleElement(selection); |
| if (single == null) |
| return null; |
| return getCandidate(single); |
| } |
| |
| /** |
| * Converts the input to a possible input candidates |
| */ |
| public static IMethod getCandidate(Object input) { |
| if (!(input instanceof IMethod)) { |
| return null; |
| } |
| return (IMethod) input; |
| } |
| } |