| /******************************************************************************* |
| * Copyright (c) 2006, 2010 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 |
| * Brad Reynolds - bugs 164247, 164134 |
| * Matthew Hall - bug 302860 |
| *******************************************************************************/ |
| |
| package org.eclipse.jface.databinding.viewers; |
| |
| import java.util.Set; |
| |
| import org.eclipse.core.databinding.observable.map.IMapChangeListener; |
| import org.eclipse.core.databinding.observable.map.IObservableMap; |
| import org.eclipse.core.databinding.observable.map.MapChangeEvent; |
| import org.eclipse.jface.viewers.ILabelProvider; |
| import org.eclipse.jface.viewers.ITableLabelProvider; |
| import org.eclipse.jface.viewers.LabelProvider; |
| import org.eclipse.jface.viewers.LabelProviderChangedEvent; |
| import org.eclipse.swt.graphics.Image; |
| |
| /** |
| * A label provider based on one or more observable maps that track attributes |
| * that this label provider uses for display. Clients may customize by |
| * subclassing and overriding {@link #getColumnText(Object, int)}, |
| * {@link #getColumnImage(Object, int)}, for tables or trees with columns, or by |
| * implementing additional mixin interfaces for colors, fonts etc. |
| * |
| * @since 1.1 |
| * |
| */ |
| public class ObservableMapLabelProvider extends LabelProvider implements |
| ILabelProvider, ITableLabelProvider { |
| |
| /** |
| * Observable maps typically mapping from viewer elements to label values. |
| * Subclasses may reference these maps to provide custom labels. |
| * |
| * @since 1.4 |
| */ |
| protected IObservableMap[] attributeMaps; |
| |
| private IMapChangeListener mapChangeListener = new IMapChangeListener() { |
| public void handleMapChange(MapChangeEvent event) { |
| Set affectedElements = event.diff.getChangedKeys(); |
| LabelProviderChangedEvent newEvent = new LabelProviderChangedEvent( |
| ObservableMapLabelProvider.this, affectedElements.toArray()); |
| fireLabelProviderChanged(newEvent); |
| } |
| }; |
| |
| /** |
| * @param attributeMap |
| */ |
| public ObservableMapLabelProvider(IObservableMap attributeMap) { |
| this(new IObservableMap[] { attributeMap }); |
| } |
| |
| /** |
| * @param attributeMaps |
| */ |
| public ObservableMapLabelProvider(IObservableMap[] attributeMaps) { |
| System.arraycopy(attributeMaps, 0, |
| this.attributeMaps = new IObservableMap[attributeMaps.length], |
| 0, attributeMaps.length); |
| for (int i = 0; i < attributeMaps.length; i++) { |
| attributeMaps[i].addMapChangeListener(mapChangeListener); |
| } |
| } |
| |
| public void dispose() { |
| for (int i = 0; i < attributeMaps.length; i++) { |
| attributeMaps[i].removeMapChangeListener(mapChangeListener); |
| } |
| super.dispose(); |
| this.attributeMaps = null; |
| this.mapChangeListener = null; |
| } |
| |
| public Image getImage(Object element) { |
| return getColumnImage(element, 0); |
| } |
| |
| public String getText(Object element) { |
| return getColumnText(element, 0); |
| } |
| |
| public Image getColumnImage(Object element, int columnIndex) { |
| return null; |
| } |
| |
| public String getColumnText(Object element, int columnIndex) { |
| if (columnIndex < attributeMaps.length) { |
| Object result = attributeMaps[columnIndex].get(element); |
| return result == null ? "" : result.toString(); //$NON-NLS-1$ |
| } |
| return null; |
| } |
| |
| } |