| /* |
| *(c) Copyright QNX Software Systems Ltd. 2002. |
| * All Rights Reserved. |
| * |
| */ |
| package org.eclipse.cdt.debug.internal.ui; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| |
| import org.eclipse.cdt.debug.ui.CDebugUIPlugin; |
| import org.eclipse.jface.resource.ImageDescriptor; |
| import org.eclipse.jface.util.Assert; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.swt.widgets.Display; |
| |
| /** |
| * |
| * A registry that maps <code>ImageDescriptors</code> to <code>Image</code>. |
| * |
| * @since Aug 30, 2002 |
| */ |
| public class CDebugImageDescriptorRegistry |
| { |
| private HashMap fRegistry = new HashMap(10); |
| private Display fDisplay; |
| |
| /** |
| * Creates a new image descriptor registry for the current or default display, |
| * respectively. |
| */ |
| public CDebugImageDescriptorRegistry() |
| { |
| this( CDebugUIPlugin.getStandardDisplay() ); |
| } |
| |
| /** |
| * Creates a new image descriptor registry for the given display. All images |
| * managed by this registry will be disposed when the display gets disposed. |
| * |
| * @param diaplay the display the images managed by this registry are allocated for |
| */ |
| public CDebugImageDescriptorRegistry( Display display ) |
| { |
| fDisplay = display; |
| Assert.isNotNull( fDisplay ); |
| hookDisplay(); |
| } |
| |
| /** |
| * Returns the image associated with the given image descriptor. |
| * |
| * @param descriptor the image descriptor for which the registry manages an image |
| * @return the image associated with the image descriptor or <code>null</code> |
| * if the image descriptor can't create the requested image. |
| */ |
| public Image get( ImageDescriptor descriptor ) |
| { |
| if ( descriptor == null ) |
| descriptor = ImageDescriptor.getMissingImageDescriptor(); |
| |
| Image result = (Image)fRegistry.get( descriptor ); |
| if ( result != null ) |
| return result; |
| |
| Assert.isTrue( fDisplay == CDebugUIPlugin.getStandardDisplay(), "Allocating image for wrong display" ); |
| result = descriptor.createImage(); |
| if ( result != null ) |
| fRegistry.put( descriptor, result ); |
| return result; |
| } |
| |
| /** |
| * Disposes all images managed by this registry. |
| */ |
| public void dispose() |
| { |
| for ( Iterator iter = fRegistry.values().iterator(); iter.hasNext(); ) |
| { |
| Image image = (Image)iter.next(); |
| image.dispose(); |
| } |
| fRegistry.clear(); |
| } |
| |
| private void hookDisplay() |
| { |
| fDisplay.disposeExec( new Runnable() |
| { |
| public void run() |
| { |
| dispose(); |
| } |
| } ); |
| } |
| } |