Mercurial > projects > dwt-linux
annotate dwt/graphics/Resource.d @ 10:63c023465156
moved from org.eclipse.swt to dwt
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sat, 05 Jan 2008 17:58:37 +0100 |
| parents | ad2b69216039 |
| children | 4db14dc0bc45 |
| rev | line source |
|---|---|
| 4 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2000, 2005 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 *******************************************************************************/ | |
|
10
63c023465156
moved from org.eclipse.swt to dwt
Frank Benoit <benoit@tionex.de>
parents:
9
diff
changeset
|
11 module dwt.graphics.Resource; |
| 4 | 12 |
|
10
63c023465156
moved from org.eclipse.swt to dwt
Frank Benoit <benoit@tionex.de>
parents:
9
diff
changeset
|
13 import dwt.SWT; |
| 4 | 14 |
| 15 //PORTING_TYPE | |
| 16 class Device{} | |
| 17 | |
| 18 /** | |
| 19 * This class is the abstract superclass of all graphics resource objects. | |
| 20 * Resources created by the application must be disposed. | |
| 21 * <p> | |
| 22 * IMPORTANT: This class is intended to be subclassed <em>only</em> | |
| 23 * within the SWT implementation. However, it has not been marked | |
| 24 * final to allow those outside of the SWT development team to implement | |
| 25 * patched versions of the class in order to get around specific | |
| 26 * limitations in advance of when those limitations can be addressed | |
| 27 * by the team. Any class built using subclassing to access the internals | |
| 28 * of this class will likely fail to compile or run between releases and | |
| 29 * may be strongly platform specific. Subclassing should not be attempted | |
| 30 * without an intimate and detailed understanding of the workings of the | |
| 31 * hierarchy. No support is provided for user-written classes which are | |
| 32 * implemented as subclasses of this class. | |
| 33 * </p> | |
| 34 * | |
| 35 * @see #dispose | |
| 36 * @see #isDisposed | |
| 37 * | |
| 38 * @since 3.1 | |
| 39 */ | |
| 40 public abstract class Resource { | |
| 41 | |
| 42 /** | |
| 43 * the device where this resource was created | |
| 44 */ | |
| 45 Device device; | |
| 46 | |
| 47 /** | |
| 48 * Disposes of the operating system resources associated with | |
| 49 * this resource. Applications must dispose of all resources | |
| 50 * which they allocate. | |
| 51 */ | |
| 52 public abstract void dispose(); | |
| 53 | |
| 54 /** | |
| 55 * Returns the <code>Device</code> where this resource was | |
| 56 * created. | |
| 57 * | |
| 58 * @return <code>Device</code> the device of the receiver | |
| 59 * | |
| 60 * @since 3.2 | |
| 61 */ | |
| 62 public Device getDevice() { | |
| 63 Device device = this.device; | |
| 64 if (device is null || isDisposed ()) SWT.error (SWT.ERROR_GRAPHIC_DISPOSED); | |
| 65 return device; | |
| 66 } | |
| 67 | |
| 68 /** | |
| 69 * Returns <code>true</code> if the resource has been disposed, | |
| 70 * and <code>false</code> otherwise. | |
| 71 * <p> | |
| 72 * This method gets the dispose state for the resource. | |
| 73 * When a resource has been disposed, it is an error to | |
| 74 * invoke any other method using the resource. | |
| 75 * | |
| 76 * @return <code>true</code> when the resource is disposed and <code>false</code> otherwise | |
| 77 */ | |
| 78 public abstract bool isDisposed(); | |
| 79 | |
| 80 } |