| /******************************************************************************* |
| * Copyright (c) 2010 BestSolution.at and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.e4.tools.emf.ui.internal; |
| |
| import java.util.Set; |
| |
| import org.eclipse.core.databinding.observable.map.IMapChangeListener; |
| import org.eclipse.core.databinding.observable.map.IObservableMap; |
| import org.eclipse.jface.viewers.CellLabelProvider; |
| import org.eclipse.jface.viewers.LabelProviderChangedEvent; |
| import org.eclipse.jface.viewers.ViewerCell; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.graphics.Font; |
| import org.eclipse.swt.graphics.Image; |
| |
| public class ObservableColumnLabelProvider<M> extends CellLabelProvider { |
| private IObservableMap<M, ?>[] attributeMaps; |
| |
| private IMapChangeListener<M, Object> mapChangeListener = event -> { |
| Set<? extends M> affectedElements = event.diff.getChangedKeys(); |
| LabelProviderChangedEvent newEvent = new LabelProviderChangedEvent(ObservableColumnLabelProvider.this, affectedElements.toArray()); |
| fireLabelProviderChanged(newEvent); |
| }; |
| |
| /** |
| * Creates a new label provider that tracks changes to one attribute. |
| * |
| * @param attributeMap |
| */ |
| @SuppressWarnings("unchecked") |
| public ObservableColumnLabelProvider(IObservableMap<?, ?> attributeMap) { |
| this(new IObservableMap[] { attributeMap }); |
| } |
| |
| /** |
| * Creates a new label provider that tracks changes to more than one |
| * attribute. This constructor should be used by subclasses that override |
| * {@link #update(ViewerCell)} and make use of more than one attribute. |
| * |
| * @param attributeMaps |
| */ |
| @SuppressWarnings("unchecked") |
| protected ObservableColumnLabelProvider(IObservableMap<M, ?>[] 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); |
| } |
| } |
| |
| @Override |
| public void dispose() { |
| for (int i = 0; i < attributeMaps.length; i++) { |
| attributeMaps[i].removeMapChangeListener(mapChangeListener); |
| } |
| super.dispose(); |
| this.attributeMaps = null; |
| this.mapChangeListener = null; |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public void update(ViewerCell cell) { |
| M element = (M) cell.getElement(); |
| cell.setText(getText(element)); |
| cell.setImage(getImage(element)); |
| cell.setBackground(getBackground(element)); |
| cell.setForeground(getForeground(element)); |
| cell.setFont(getFont(element)); |
| } |
| |
| public String getText(M element) { |
| Object value = attributeMaps[0].get(element); |
| return value == null ? "" : value.toString(); //$NON-NLS-1$ |
| } |
| |
| public Font getFont(M element) { |
| return null; |
| } |
| |
| public Color getBackground(M element) { |
| return null; |
| } |
| |
| public Color getForeground(M element) { |
| return null; |
| } |
| |
| public Image getImage(M element) { |
| return null; |
| } |
| |
| } |