| /* |
| * Copyright (c) 2015 Eike Stepper (Berlin, Germany) 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: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.userstorage.ui.internal; |
| |
| import org.eclipse.userstorage.IStorageService; |
| import org.eclipse.userstorage.IStorageService.Registry; |
| |
| import org.eclipse.jface.viewers.IStructuredContentProvider; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.swt.widgets.Control; |
| |
| import java.util.Arrays; |
| |
| /** |
| * @author Eike Stepper |
| */ |
| public class ServicesContentProvider implements IStructuredContentProvider, IStorageService.Registry.Listener |
| { |
| private static final Object[] NO_ELEMENTS = {}; |
| |
| private Viewer viewer; |
| |
| private IStorageService.Registry registry; |
| |
| public ServicesContentProvider() |
| { |
| } |
| |
| @Override |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) |
| { |
| dispose(); |
| |
| this.viewer = viewer; |
| registry = (Registry)newInput; |
| |
| if (registry != null) |
| { |
| registry.addListener(this); |
| } |
| } |
| |
| @Override |
| public void serviceAdded(IStorageService service) |
| { |
| refreshViewer(); |
| } |
| |
| @Override |
| public void serviceRemoved(IStorageService service) |
| { |
| refreshViewer(); |
| } |
| |
| @Override |
| public Object[] getElements(Object inputElement) |
| { |
| if (registry != null) |
| { |
| IStorageService[] services = registry.getServices(); |
| Arrays.sort(services); |
| return services; |
| } |
| |
| return NO_ELEMENTS; |
| } |
| |
| @Override |
| public void dispose() |
| { |
| if (registry != null) |
| { |
| registry.removeListener(this); |
| } |
| } |
| |
| private void refreshViewer() |
| { |
| if (viewer != null) |
| { |
| final Control control = viewer.getControl(); |
| control.getDisplay().asyncExec(new Runnable() |
| { |
| @Override |
| public void run() |
| { |
| if (!control.isDisposed()) |
| { |
| viewer.refresh(); |
| } |
| } |
| }); |
| } |
| } |
| } |