| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jface.viewers; |
| |
| import java.util.EventObject; |
| |
| /** |
| * Event object describing a label provider state change. |
| * |
| * @see ILabelProviderListener |
| */ |
| public class LabelProviderChangedEvent extends EventObject { |
| |
| /** |
| * The elements whose labels need to be updated or <code>null</code>. |
| */ |
| private Object[] elements; |
| |
| /** |
| * Creates a new event for the given source, indicating that all labels |
| * provided by the source are no longer valid and should be updated. |
| * |
| * @param source the label provider |
| */ |
| public LabelProviderChangedEvent(IBaseLabelProvider source) { |
| super(source); |
| } |
| |
| /** |
| * Creates a new event for the given source, indicating that the label |
| * provided by the source for the given elements is no longer valid and should be updated. |
| * |
| * @param source the label provider |
| * @param elements the element whose labels have changed |
| */ |
| public LabelProviderChangedEvent( |
| IBaseLabelProvider source, |
| Object[] elements) { |
| super(source); |
| this.elements = elements; |
| } |
| |
| /** |
| * Creates a new event for the given source, indicating that the label |
| * provided by the source for the given element is no longer valid and should be updated. |
| * |
| * @param source the label provider |
| * @param element the element whose label needs to be updated |
| */ |
| public LabelProviderChangedEvent(IBaseLabelProvider source, Object element) { |
| super(source); |
| this.elements = new Object[1]; |
| this.elements[0] = element; |
| } |
| |
| /** |
| * Returns the first element whose label needs to be updated, |
| * or <code>null</code> if all labels need to be updated. |
| * |
| * @return the element whose label needs to be updated or <code>null</code> |
| */ |
| public Object getElement() { |
| if (this.elements == null || this.elements.length == 0) |
| return null; |
| else |
| return this.elements[0]; |
| } |
| |
| /** |
| * Returns the elements whose labels need to be updated, |
| * or <code>null</code> if all labels need to be updated. |
| * |
| * @return the element whose labels need to be updated or <code>null</code> |
| */ |
| public Object[] getElements() { |
| if (this.elements == null) |
| return null; |
| else |
| return this.elements; |
| } |
| } |