Mercurial > projects > dwt2
view org.eclipse.jface/src/org/eclipse/jface/resource/DerivedImageDescriptor.d @ 12:bc29606a740c
Added dwt-addons in original directory structure of eclipse.org
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 14 Mar 2009 18:23:29 +0100 |
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/******************************************************************************* * Copyright (c) 2005, 2006 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module org.eclipse.jface.resource.DerivedImageDescriptor; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.resource.DeviceResourceException; import org.eclipse.swt.SWT; import org.eclipse.swt.SWTException; import org.eclipse.swt.graphics.Device; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.widgets.Display; import java.lang.all; /** * An image descriptor which creates images based on another ImageDescriptor, but with * additional SWT flags. Note that this is only intended for compatibility. * * @since 3.1 */ final class DerivedImageDescriptor : ImageDescriptor { alias ImageDescriptor.createImage createImage; private ImageDescriptor original; private int flags; /** * Create a new image descriptor * @param original the original one * @param swtFlags flags to be used when image is created {@link Image#Image(Device, Image, int)} * @see SWT#IMAGE_COPY * @see SWT#IMAGE_DISABLE * @see SWT#IMAGE_GRAY */ public this(ImageDescriptor original, int swtFlags) { this.original = original; flags = swtFlags; } public override Object createResource(Device device) { try { return internalCreateImage(device); } catch (SWTException e) { throw new DeviceResourceException(this, e); } } public override Image createImage(Device device) { return internalCreateImage(device); } public override hash_t toHash() { return original.toHash() + flags; } public override int opEquals(Object arg0) { if ( auto desc = cast(DerivedImageDescriptor)arg0 ) { return desc.original is original && flags is desc.flags; } return false; } /** * Creates a new Image on the given device. Note that we defined a new * method rather than overloading createImage since this needs to be * called by getImageData(), and we want to be absolutely certain not * to cause infinite recursion if the base class gets refactored. * * @param device device to create the image on * @return a newly allocated Image. Must be disposed by calling image.dispose(). */ private final Image internalCreateImage(Device device) { Image originalImage = original.createImage(device); Image result = new Image(device, originalImage, flags); original.destroyResource(originalImage); return result; } public override ImageData getImageData() { Image image = internalCreateImage(Display.getCurrent()); ImageData result = image.getImageData(); image.dispose(); return result; } }