Mercurial > projects > dwt-win
annotate dwt/graphics/Resource.d @ 246:fd9c62a2998e
Updater SWT 3.4M7 to 3.4
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Tue, 01 Jul 2008 10:15:59 +0200 |
| parents | 36f5cb12e1a2 |
| children | 684eed7589a0 |
| rev | line source |
|---|---|
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f906dbcacee5
Minor changes to be more compatible to dwt-linux, formatting in toString, Display.DEBUG=true
Frank Benoit <benoit@tionex.de>
parents:
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diff
changeset
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1 /******************************************************************************* |
| 246 | 2 * Copyright (c) 2000, 2008 IBM Corporation and others. |
| 14 | 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 | |
|
174
f906dbcacee5
Minor changes to be more compatible to dwt-linux, formatting in toString, Display.DEBUG=true
Frank Benoit <benoit@tionex.de>
parents:
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diff
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10 * Port to the D programming language: |
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f906dbcacee5
Minor changes to be more compatible to dwt-linux, formatting in toString, Display.DEBUG=true
Frank Benoit <benoit@tionex.de>
parents:
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diff
changeset
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11 * Frank Benoit <benoit@tionex.de> |
| 14 | 12 *******************************************************************************/ |
| 13 module dwt.graphics.Resource; | |
| 14 | |
| 15 import dwt.DWT; | |
| 16 import dwt.graphics.Device; | |
| 17 | |
| 18 /** | |
|
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Minor changes to be more compatible to dwt-linux, formatting in toString, Display.DEBUG=true
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19 * This class is the abstract superclass of all graphics resource objects. |
| 14 | 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 DWT implementation. However, it has not been marked | |
| 24 * final to allow those outside of the DWT 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 | |
| 246 | 37 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
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parents:
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38 * |
| 14 | 39 * @since 3.1 |
| 40 */ | |
| 41 public abstract class Resource { | |
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parents:
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42 |
| 14 | 43 /** |
| 44 * the device where this resource was created | |
| 45 */ | |
| 46 Device device; | |
| 47 | |
| 246 | 48 public this() { |
| 213 | 49 } |
| 50 | |
| 51 this(Device device) { | |
| 52 if (device is null) device = Device.getDevice(); | |
| 53 if (device is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 54 this.device = device; | |
| 55 } | |
| 56 | |
| 57 void destroy() { | |
| 58 } | |
| 59 | |
| 14 | 60 /** |
| 61 * Disposes of the operating system resources associated with | |
| 62 * this resource. Applications must dispose of all resources | |
| 63 * which they allocate. | |
| 64 */ | |
| 213 | 65 public void dispose() { |
| 66 if (device is null) return; | |
| 67 if (device.isDisposed()) return; | |
| 68 destroy(); | |
| 69 if (device.tracking) device.dispose_Object(this); | |
| 70 device = null; | |
| 71 } | |
| 14 | 72 |
| 73 /** | |
| 74 * Returns the <code>Device</code> where this resource was | |
| 75 * created. | |
| 76 * | |
| 77 * @return <code>Device</code> the device of the receiver | |
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174
f906dbcacee5
Minor changes to be more compatible to dwt-linux, formatting in toString, Display.DEBUG=true
Frank Benoit <benoit@tionex.de>
parents:
14
diff
changeset
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78 * |
| 14 | 79 * @since 3.2 |
| 80 */ | |
| 81 public Device getDevice() { | |
| 82 Device device = this.device; | |
| 83 if (device is null || isDisposed ()) DWT.error (DWT.ERROR_GRAPHIC_DISPOSED); | |
| 84 return device; | |
| 85 } | |
| 86 | |
| 213 | 87 void init_() { |
| 88 if (device.tracking) device.new_Object(this); | |
| 89 } | |
| 90 | |
| 14 | 91 /** |
| 92 * Returns <code>true</code> if the resource has been disposed, | |
| 93 * and <code>false</code> otherwise. | |
| 94 * <p> | |
| 95 * This method gets the dispose state for the resource. | |
| 96 * When a resource has been disposed, it is an error to | |
| 97 * invoke any other method using the resource. | |
| 98 * | |
| 99 * @return <code>true</code> when the resource is disposed and <code>false</code> otherwise | |
| 100 */ | |
| 101 public abstract bool isDisposed(); | |
| 102 | |
| 103 } |