| /******************************************************************************* |
| * 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.examples.jobs.views; |
| |
| import org.eclipse.jface.viewers.AbstractTreeViewer; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.ui.model.BaseWorkbenchContentProvider; |
| import org.eclipse.ui.progress.DeferredTreeContentManager; |
| |
| public class DeferredContentProvider extends BaseWorkbenchContentProvider { |
| |
| private DeferredTreeContentManager manager; |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object) |
| */ |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| if (viewer instanceof AbstractTreeViewer) { |
| manager = new DeferredTreeContentManager(this, (AbstractTreeViewer) viewer); |
| } |
| super.inputChanged(viewer, oldInput, newInput); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object) |
| */ |
| public boolean hasChildren(Object element) { |
| // the + box will always appear, but then disappear |
| // if not needed after you first click on it. |
| if (manager != null) { |
| if (manager.isDeferredAdapter(element)) |
| return manager.mayHaveChildren(element); |
| } |
| |
| return super.hasChildren(element); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.model.WorkbenchContentProvider#getChildren(java.lang.Object) |
| */ |
| public Object[] getChildren(Object element) { |
| if (manager != null) { |
| Object[] children = manager.getChildren(element); |
| if(children != null) { |
| return children; |
| } |
| } |
| return super.getChildren(element); |
| } |
| } |