WorkingSetLabelProvider


1   /*******************************************************************************
2    * Copyright (c) 2005, 2006 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials
4    * are made available under the terms of the Eclipse Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/epl-v10.html
7    *
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  
12  package org.eclipse.ui.internal.dialogs;
13  
14  import java.util.Hashtable  ;
15  import java.util.Iterator  ;
16  import java.util.Map  ;
17  
18  import org.eclipse.core.runtime.Assert;
19  import org.eclipse.jface.resource.ImageDescriptor;
20  import org.eclipse.jface.viewers.LabelProvider;
21  import org.eclipse.swt.graphics.Image;
22  import org.eclipse.ui.IWorkingSet;
23  
24  public class WorkingSetLabelProvider extends LabelProvider {
25      private Map   icons;
26  
27      /**
28       * Create a new instance of the receiver.
29       */
30      public WorkingSetLabelProvider() {
31          icons = new Hashtable  ();
32      }
33  
34      public void dispose() {
35          Iterator   iterator = icons.values().iterator();
36  
37          while (iterator.hasNext()) {
38              Image icon = (Image) iterator.next();
39              icon.dispose();
40          }
41          super.dispose();
42      }
43  
44      public Image getImage(Object   object) {
45          Assert.isTrue(object instanceof IWorkingSet);
46          IWorkingSet workingSet = (IWorkingSet) object;
47          ImageDescriptor imageDescriptor = workingSet.getImageDescriptor();
48  
49          if (imageDescriptor == null) {
50              return null;
51          }
52  
53          Image icon = (Image) icons.get(imageDescriptor);
54          if (icon == null) {
55              icon = imageDescriptor.createImage();
56              icons.put(imageDescriptor, icon);
57          }
58          return icon;
59      }
60  
61      public String   getText(Object   object) {
62          Assert.isTrue(object instanceof IWorkingSet);
63          IWorkingSet workingSet = (IWorkingSet) object;
64          return workingSet.getLabel();
65      }
66  }
67
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