ImageFactory


1   /*******************************************************************************
2    * Copyright (c) 2000, 2007 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.keys;
13  
14  import java.util.HashMap  ;
15  import java.util.Map  ;
16  
17  import org.eclipse.jface.resource.ImageDescriptor;
18  import org.eclipse.jface.resource.ImageRegistry;
19  import org.eclipse.swt.graphics.Image;
20  import org.eclipse.ui.internal.WorkbenchPlugin;
21  import org.eclipse.ui.internal.util.ImageSupport;
22  
23  final class ImageFactory {
24  
25      private static ImageRegistry imageRegistry = new ImageRegistry();
26      private static Map   map = new HashMap  ();
27  
28      static {
29          put("blank", "$nl$/icons/full/obj16/blank.gif"); //$NON-NLS-1$//$NON-NLS-2$
30          put("change", "$nl$/icons/full/obj16/change_obj.gif"); //$NON-NLS-1$//$NON-NLS-2$
31          
32          /*
33           * TODO Remove these images from the registry if they are no longer
34           * needed.
35           */
36          put("minus", "$nl$/icons/full/obj16/delete_obj.gif"); //$NON-NLS-1$//$NON-NLS-2$
37          put("plus", "$nl$/icons/full/obj16/add_obj.gif"); //$NON-NLS-1$//$NON-NLS-2$
38      }
39  
40      static Image getImage(String   key) {
41          Image image = imageRegistry.get(key);
42  
43          if (image == null) {
44              ImageDescriptor imageDescriptor = getImageDescriptor(key);
45  
46              if (imageDescriptor != null) {
47                  image = imageDescriptor.createImage(false);
48  
49                  if (image == null) {
50                      WorkbenchPlugin.log(ImageFactory.class +": error creating image for " + key); //$NON-NLS-1$
51                  }
52  
53                  imageRegistry.put(key, image);
54              }
55          }
56  
57          return image;
58      }
59  
60      static ImageDescriptor getImageDescriptor(String   key) {
61          ImageDescriptor imageDescriptor = (ImageDescriptor) map.get(key);
62  
63          if (imageDescriptor == null) {
64              WorkbenchPlugin.log(ImageFactory.class +": no image descriptor for " + key); //$NON-NLS-1$
65          }
66  
67          return imageDescriptor;
68      }
69  
70      private static void put(String   key, String   value) {
71          map.put(key, ImageSupport.getImageDescriptor(value));
72      }
73  }
74
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