| /******************************************************************************* |
| * Copyright (c) 2008 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.remote.internal.ui; |
| |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.ui.IWorkingSet; |
| import org.eclipse.ui.model.WorkbenchContentProvider; |
| |
| /** |
| * Extension to the generic workbench content provider mechanism |
| * to lazily determine whether an element has children. That is, |
| * children for an element aren't fetched until the user clicks |
| * on the tree expansion box. |
| */ |
| public class RemoteContentProvider extends WorkbenchContentProvider { |
| private IWorkingSet workingSet; |
| private RemoteTreeContentManager manager; |
| |
| @Override |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| if (newInput != null) { |
| manager = new RemoteTreeContentManager(this, (RemoteTreeViewer) viewer, null); |
| } else { |
| manager = null; |
| } |
| super.inputChanged(viewer, oldInput, newInput); |
| } |
| |
| @Override |
| public boolean hasChildren(Object element) { |
| if (manager != null /* && manager.isDeferredAdapter(element) */) { |
| return manager.mayHaveChildren(element); |
| } |
| |
| return super.hasChildren(element); |
| } |
| |
| /** |
| * Sets the workingSet. |
| * |
| * @param workingSet |
| * The workingSet to set |
| */ |
| public void setWorkingSet(IWorkingSet workingSet) { |
| this.workingSet = workingSet; |
| } |
| |
| /** |
| * Returns the workingSet. |
| * |
| * @return IWorkingSet |
| */ |
| public IWorkingSet getWorkingSet() { |
| return workingSet; |
| } |
| |
| @Override |
| public Object[] getChildren(Object element) { |
| if (manager != null) { |
| Object[] children = manager.getChildren(element); |
| if (children != null) { |
| return children; |
| } |
| } |
| return super.getChildren(element); |
| } |
| } |