Mercurial > projects > dwt-win
annotate dwt/graphics/Resource.d @ 333:684eed7589a0
Generate error if a resource is deleted without disposal. Without that, is is very hard to find accidental deleted/scoped Color/Font/..
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Tue, 10 Feb 2009 17:14:24 +0100 |
| parents | fd9c62a2998e |
| children | c49e17d48b76 |
| rev | line source |
|---|---|
|
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
|
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:
14
diff
changeset
|
10 * Port to the D programming language: |
|
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
|
11 * Frank Benoit <benoit@tionex.de> |
| 14 | 12 *******************************************************************************/ |
| 13 module dwt.graphics.Resource; | |
| 14 | |
| 15 import dwt.DWT; | |
| 16 import dwt.graphics.Device; | |
|
333
684eed7589a0
Generate error if a resource is deleted without disposal. Without that, is is very hard to find accidental deleted/scoped Color/Font/..
Frank Benoit <benoit@tionex.de>
parents:
246
diff
changeset
|
17 //import tango.util.log.Trace; |
| 14 | 18 |
| 19 /** | |
|
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
|
20 * This class is the abstract superclass of all graphics resource objects. |
| 14 | 21 * Resources created by the application must be disposed. |
| 22 * <p> | |
| 23 * IMPORTANT: This class is intended to be subclassed <em>only</em> | |
| 24 * within the DWT implementation. However, it has not been marked | |
| 25 * final to allow those outside of the DWT development team to implement | |
| 26 * patched versions of the class in order to get around specific | |
| 27 * limitations in advance of when those limitations can be addressed | |
| 28 * by the team. Any class built using subclassing to access the internals | |
| 29 * of this class will likely fail to compile or run between releases and | |
| 30 * may be strongly platform specific. Subclassing should not be attempted | |
| 31 * without an intimate and detailed understanding of the workings of the | |
| 32 * hierarchy. No support is provided for user-written classes which are | |
| 33 * implemented as subclasses of this class. | |
| 34 * </p> | |
| 35 * | |
| 36 * @see #dispose | |
| 37 * @see #isDisposed | |
| 246 | 38 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
|
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
|
39 * |
| 14 | 40 * @since 3.1 |
| 41 */ | |
| 42 public abstract class Resource { | |
|
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
|
43 |
| 14 | 44 /** |
| 45 * the device where this resource was created | |
| 46 */ | |
| 47 Device device; | |
| 48 | |
| 246 | 49 public this() { |
| 213 | 50 } |
| 51 | |
| 52 this(Device device) { | |
| 53 if (device is null) device = Device.getDevice(); | |
| 54 if (device is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 55 this.device = device; | |
| 56 } | |
| 57 | |
|
333
684eed7589a0
Generate error if a resource is deleted without disposal. Without that, is is very hard to find accidental deleted/scoped Color/Font/..
Frank Benoit <benoit@tionex.de>
parents:
246
diff
changeset
|
58 ~this(){ |
|
684eed7589a0
Generate error if a resource is deleted without disposal. Without that, is is very hard to find accidental deleted/scoped Color/Font/..
Frank Benoit <benoit@tionex.de>
parents:
246
diff
changeset
|
59 if( !isDisposed ){ |
|
684eed7589a0
Generate error if a resource is deleted without disposal. Without that, is is very hard to find accidental deleted/scoped Color/Font/..
Frank Benoit <benoit@tionex.de>
parents:
246
diff
changeset
|
60 //Trace.formatln("{} {} {} Resource deleted, but is not yet disposed", __FILE__, __LINE__, this.classinfo.name ); |
|
684eed7589a0
Generate error if a resource is deleted without disposal. Without that, is is very hard to find accidental deleted/scoped Color/Font/..
Frank Benoit <benoit@tionex.de>
parents:
246
diff
changeset
|
61 DWT.error( 0, null, " Resource deleted, but is not yet disposed: (" ~ this.classinfo.name ~ ")" ); |
|
684eed7589a0
Generate error if a resource is deleted without disposal. Without that, is is very hard to find accidental deleted/scoped Color/Font/..
Frank Benoit <benoit@tionex.de>
parents:
246
diff
changeset
|
62 } |
|
684eed7589a0
Generate error if a resource is deleted without disposal. Without that, is is very hard to find accidental deleted/scoped Color/Font/..
Frank Benoit <benoit@tionex.de>
parents:
246
diff
changeset
|
63 } |
|
684eed7589a0
Generate error if a resource is deleted without disposal. Without that, is is very hard to find accidental deleted/scoped Color/Font/..
Frank Benoit <benoit@tionex.de>
parents:
246
diff
changeset
|
64 |
| 213 | 65 void destroy() { |
| 66 } | |
| 67 | |
| 14 | 68 /** |
| 69 * Disposes of the operating system resources associated with | |
| 70 * this resource. Applications must dispose of all resources | |
| 71 * which they allocate. | |
| 72 */ | |
| 213 | 73 public void dispose() { |
| 74 if (device is null) return; | |
| 75 if (device.isDisposed()) return; | |
| 76 destroy(); | |
| 77 if (device.tracking) device.dispose_Object(this); | |
| 78 device = null; | |
| 79 } | |
| 14 | 80 |
| 81 /** | |
| 82 * Returns the <code>Device</code> where this resource was | |
| 83 * created. | |
| 84 * | |
| 85 * @return <code>Device</code> the device of the receiver | |
|
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
|
86 * |
| 14 | 87 * @since 3.2 |
| 88 */ | |
| 89 public Device getDevice() { | |
| 90 Device device = this.device; | |
| 91 if (device is null || isDisposed ()) DWT.error (DWT.ERROR_GRAPHIC_DISPOSED); | |
| 92 return device; | |
| 93 } | |
| 94 | |
| 213 | 95 void init_() { |
| 96 if (device.tracking) device.new_Object(this); | |
| 97 } | |
| 98 | |
| 14 | 99 /** |
| 100 * Returns <code>true</code> if the resource has been disposed, | |
| 101 * and <code>false</code> otherwise. | |
| 102 * <p> | |
| 103 * This method gets the dispose state for the resource. | |
| 104 * When a resource has been disposed, it is an error to | |
| 105 * invoke any other method using the resource. | |
| 106 * | |
| 107 * @return <code>true</code> when the resource is disposed and <code>false</code> otherwise | |
| 108 */ | |
| 109 public abstract bool isDisposed(); | |
| 110 | |
| 111 } |