Mercurial > projects > dwt-linux
annotate dwt/accessibility/Accessible.d @ 320:f516317c1e89
Fix tango.core.Array.remove use
author | Frank Benoit <benoit@tionex.de> |
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date | Fri, 19 Sep 2008 22:29:59 +0200 |
parents | c0d810de7093 |
children |
rev | line source |
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72 | 1 /******************************************************************************* |
259 | 2 * Copyright (c) 2000, 2008 IBM Corporation and others. |
42 | 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 | |
72 | 10 * Port to the D programming language: |
11 * Frank Benoit <benoit@tionex.de> | |
42 | 12 *******************************************************************************/ |
13 module dwt.accessibility.Accessible; | |
14 | |
15 import dwt.accessibility.AccessibleListener; | |
16 import dwt.accessibility.AccessibleTextListener; | |
17 import dwt.accessibility.AccessibleControlListener; | |
18 import dwt.accessibility.AccessibleControlListener; | |
19 import dwt.accessibility.AccessibleFactory; | |
20 import dwt.accessibility.AccessibleObject; | |
21 import tango.core.Thread; | |
71 | 22 import dwt.DWT; |
42 | 23 //import dwt.events.*; |
24 import dwt.internal.gtk.OS; | |
25 import dwt.widgets.Control; | |
26 import tango.core.Array; | |
27 import dwt.events.DisposeListener; | |
28 import dwt.events.DisposeEvent; | |
29 | |
30 /** | |
31 * Instances of this class provide a bridge between application | |
32 * code and assistive technology clients. Many platforms provide | |
33 * default accessible behavior for most widgets, and this class | |
34 * allows that default behavior to be overridden. Applications | |
35 * can get the default Accessible object for a control by sending | |
36 * it <code>getAccessible</code>, and then add an accessible listener | |
37 * to override simple items like the name and help string, or they | |
38 * can add an accessible control listener to override complex items. | |
39 * As a rule of thumb, an application would only want to use the | |
40 * accessible control listener to implement accessibility for a | |
41 * custom control. | |
42 * | |
43 * @see Control#getAccessible | |
44 * @see AccessibleListener | |
45 * @see AccessibleEvent | |
46 * @see AccessibleControlListener | |
47 * @see AccessibleControlEvent | |
259 | 48 * @see <a href="http://www.eclipse.org/swt/snippets/#accessibility">Accessibility snippets</a> |
49 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> | |
42 | 50 * |
51 * @since 2.0 | |
52 */ | |
53 public class Accessible { | |
59
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54 AccessibleListener[] accessibleListeners; |
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55 AccessibleControlListener[] controlListeners; |
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56 AccessibleTextListener[] textListeners; |
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57 AccessibleObject accessibleObject; |
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58 Control control; |
42 | 59 |
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60 this (Control control) { |
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61 this.control = control; |
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62 AccessibleFactory.registerAccessible (this); |
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63 control.addDisposeListener (new class () DisposeListener { |
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64 public void widgetDisposed (DisposeEvent e) { |
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65 release (); |
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66 } |
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67 }); |
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68 } |
42 | 69 |
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70 /** |
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71 * Adds the listener to the collection of listeners who will |
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72 * be notified when an accessible client asks for certain strings, |
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73 * such as name, description, help, or keyboard shortcut. The |
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74 * listener is notified by sending it one of the messages defined |
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75 * in the <code>AccessibleListener</code> interface. |
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76 * |
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77 * @param listener the listener that should be notified when the receiver |
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78 * is asked for a name, description, help, or keyboard shortcut string |
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79 * |
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80 * @exception IllegalArgumentException <ul> |
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81 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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82 * </ul> |
71 | 83 * @exception DWTException <ul> |
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84 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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85 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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86 * </ul> |
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87 * |
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88 * @see AccessibleListener |
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89 * @see #removeAccessibleListener |
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90 */ |
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91 public void addAccessibleListener (AccessibleListener listener) { |
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92 checkWidget (); |
71 | 93 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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94 accessibleListeners ~= listener; |
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95 } |
42 | 96 |
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97 /** |
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98 * Adds the listener to the collection of listeners who will |
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99 * be notified when an accessible client asks for custom control |
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100 * specific information. The listener is notified by sending it |
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101 * one of the messages defined in the <code>AccessibleControlListener</code> |
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102 * interface. |
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103 * |
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104 * @param listener the listener that should be notified when the receiver |
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105 * is asked for custom control specific information |
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106 * |
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107 * @exception IllegalArgumentException <ul> |
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108 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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109 * </ul> |
71 | 110 * @exception DWTException <ul> |
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111 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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112 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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113 * </ul> |
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114 * |
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115 * @see AccessibleControlListener |
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116 * @see #removeAccessibleControlListener |
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117 */ |
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118 public void addAccessibleControlListener (AccessibleControlListener listener) { |
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119 checkWidget (); |
71 | 120 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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121 controlListeners ~= listener; |
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122 } |
42 | 123 |
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124 /** |
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125 * Adds the listener to the collection of listeners who will |
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126 * be notified when an accessible client asks for custom text control |
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127 * specific information. The listener is notified by sending it |
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128 * one of the messages defined in the <code>AccessibleTextListener</code> |
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129 * interface. |
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130 * |
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131 * @param listener the listener that should be notified when the receiver |
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132 * is asked for custom text control specific information |
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133 * |
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134 * @exception IllegalArgumentException <ul> |
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135 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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136 * </ul> |
71 | 137 * @exception DWTException <ul> |
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138 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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139 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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140 * </ul> |
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141 * |
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142 * @see AccessibleTextListener |
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143 * @see #removeAccessibleTextListener |
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144 * |
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145 * @since 3.0 |
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146 */ |
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147 public void addAccessibleTextListener (AccessibleTextListener listener) { |
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148 checkWidget (); |
71 | 149 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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150 textListeners ~= listener; |
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151 } |
42 | 152 |
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153 /** |
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154 * Returns the control for this Accessible object. |
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155 * |
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156 * @return the receiver's control |
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157 * @since 3.0 |
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158 */ |
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159 public Control getControl() { |
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160 return control; |
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161 } |
42 | 162 |
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163 /* checkWidget was copied from Widget, and rewritten to work in this package */ |
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164 void checkWidget () { |
71 | 165 if (!isValidThread ()) DWT.error (DWT.ERROR_THREAD_INVALID_ACCESS); |
166 if (control.isDisposed ()) DWT.error (DWT.ERROR_WIDGET_DISPOSED); | |
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167 } |
42 | 168 |
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169 AccessibleListener[] getAccessibleListeners () { |
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170 if (accessibleListeners.length is 0 ) return null; |
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171 return accessibleListeners.dup; |
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172 } |
42 | 173 |
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174 GtkWidget* getControlHandle () { |
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175 return control.handle; |
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176 } |
42 | 177 |
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178 AccessibleControlListener[] getControlListeners () { |
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179 if (controlListeners.length is 0) return null; |
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180 return controlListeners.dup; |
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181 } |
42 | 182 |
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183 AccessibleTextListener[] getTextListeners () { |
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184 if (textListeners.length is 0) return null; |
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185 return textListeners.dup; |
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186 } |
42 | 187 |
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188 /** |
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189 * Invokes platform specific functionality to allocate a new accessible object. |
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190 * <p> |
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191 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public |
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192 * API for <code>Accessible</code>. It is marked public only so that it |
71 | 193 * can be shared within the packages provided by DWT. It is not |
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194 * available on all platforms, and should never be called from |
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195 * application code. |
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196 * </p> |
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197 * |
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198 * @param control the control to get the accessible object for |
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199 * @return the platform specific accessible object |
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200 */ |
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201 public static Accessible internal_new_Accessible (Control control) { |
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202 return new Accessible (control); |
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203 } |
42 | 204 |
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205 /* isValidThread was copied from Widget, and rewritten to work in this package */ |
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206 bool isValidThread () { |
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207 return control.getDisplay ().getThread () is Thread.getThis (); |
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208 } |
42 | 209 |
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210 void release () { |
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211 AccessibleFactory.unregisterAccessible (/*Accessible.*/this); |
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212 if (accessibleObject !is null) { |
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213 accessibleObject.release (); |
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214 accessibleObject = null; |
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215 } |
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216 accessibleListeners = null; |
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217 controlListeners = null; |
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218 textListeners = null; |
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219 } |
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220 /** |
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221 * Removes the listener from the collection of listeners who will |
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222 * be notified when an accessible client asks for custom control |
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223 * specific information. |
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224 * |
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225 * @param listener the listener that should no longer be notified when the receiver |
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226 * is asked for custom control specific information |
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227 * |
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228 * @exception IllegalArgumentException <ul> |
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229 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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230 * </ul> |
71 | 231 * @exception DWTException <ul> |
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232 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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233 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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234 * </ul> |
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235 * |
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236 * @see AccessibleControlListener |
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237 * @see #addAccessibleControlListener |
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238 */ |
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239 public void removeAccessibleControlListener (AccessibleControlListener listener) { |
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240 checkWidget (); |
71 | 241 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
320
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242 controlListeners.length = remove( controlListeners, listener, delegate bool(AccessibleControlListener a1, AccessibleControlListener a2 ){ return a1 is a2; }); |
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243 } |
42 | 244 |
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245 /** |
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246 * Removes the listener from the collection of listeners who will |
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247 * be notified when an accessible client asks for certain strings, |
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248 * such as name, description, help, or keyboard shortcut. |
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249 * |
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250 * @param listener the listener that should no longer be notified when the receiver |
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251 * is asked for a name, description, help, or keyboard shortcut string |
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252 * |
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253 * @exception IllegalArgumentException <ul> |
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254 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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255 * </ul> |
71 | 256 * @exception DWTException <ul> |
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257 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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258 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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259 * </ul> |
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260 * |
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261 * @see AccessibleListener |
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262 * @see #addAccessibleListener |
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263 */ |
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264 public void removeAccessibleListener (AccessibleListener listener) { |
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265 checkWidget (); |
71 | 266 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
320
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267 accessibleListeners.length = remove( accessibleListeners, listener, delegate bool( AccessibleListener a1, AccessibleListener a2 ){ return a1 is a2; }); |
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268 } |
42 | 269 |
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270 /** |
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271 * Removes the listener from the collection of listeners who will |
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272 * be notified when an accessible client asks for custom text control |
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273 * specific information. |
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274 * |
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275 * @param listener the listener that should no longer be notified when the receiver |
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276 * is asked for custom text control specific information |
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277 * |
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278 * @exception IllegalArgumentException <ul> |
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279 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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280 * </ul> |
71 | 281 * @exception DWTException <ul> |
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282 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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283 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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284 * </ul> |
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285 * |
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286 * @see AccessibleTextListener |
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287 * @see #addAccessibleTextListener |
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288 * |
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289 * @since 3.0 |
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290 */ |
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291 public void removeAccessibleTextListener (AccessibleTextListener listener) { |
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292 checkWidget (); |
71 | 293 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
320
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294 textListeners.length = remove( textListeners, listener, delegate bool(AccessibleTextListener a1, AccessibleTextListener a2 ){ return a1 is a2; }); |
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295 } |
42 | 296 |
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297 /** |
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298 * Sends a message to accessible clients that the child selection |
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299 * within a custom container control has changed. |
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300 * |
71 | 301 * @exception DWTException <ul> |
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302 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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303 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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304 * </ul> |
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305 * |
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306 * @since 3.0 |
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307 */ |
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308 public void selectionChanged () { |
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309 checkWidget (); |
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310 if (accessibleObject !is null) { |
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311 accessibleObject.selectionChanged (); |
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312 } |
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313 } |
42 | 314 |
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315 /** |
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316 * Sends a message to accessible clients indicating that the focus |
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317 * has changed within a custom control. |
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318 * |
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319 * @param childID an identifier specifying a child of the control |
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320 * |
71 | 321 * @exception DWTException <ul> |
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322 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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323 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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324 * </ul> |
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325 */ |
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326 public void setFocus (int childID) { |
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327 checkWidget (); |
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328 if (accessibleObject !is null) { |
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329 accessibleObject.setFocus (childID); |
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330 } |
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331 } |
42 | 332 |
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333 /** |
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334 * Sends a message to accessible clients that the text |
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335 * caret has moved within a custom control. |
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336 * |
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337 * @param index the new caret index within the control |
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338 * |
71 | 339 * @exception DWTException <ul> |
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340 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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341 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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342 * </ul> |
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343 * |
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344 * @since 3.0 |
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345 */ |
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346 public void textCaretMoved (int index) { |
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347 checkWidget (); |
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348 if (accessibleObject !is null) { |
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349 accessibleObject.textCaretMoved (index); |
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350 } |
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351 } |
42 | 352 |
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353 /** |
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354 * Sends a message to accessible clients that the text |
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355 * within a custom control has changed. |
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356 * |
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357 * @param type the type of change, one of <code>ACC.NOTIFY_TEXT_INSERT</code> |
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358 * or <code>ACC.NOTIFY_TEXT_DELETE</code> |
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359 * @param startIndex the text index within the control where the insertion or deletion begins |
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360 * @param length the non-negative length in characters of the insertion or deletion |
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361 * |
71 | 362 * @exception DWTException <ul> |
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363 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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364 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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365 * </ul> |
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366 * |
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367 * @see ACC#TEXT_INSERT |
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368 * @see ACC#TEXT_DELETE |
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369 * |
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370 * @since 3.0 |
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371 */ |
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372 public void textChanged (int type, int startIndex, int length) { |
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373 checkWidget (); |
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374 if (accessibleObject !is null) { |
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375 accessibleObject.textChanged (type, startIndex, length); |
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376 } |
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377 } |
42 | 378 |
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379 /** |
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380 * Sends a message to accessible clients that the text |
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381 * selection has changed within a custom control. |
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382 * |
71 | 383 * @exception DWTException <ul> |
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384 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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385 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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386 * </ul> |
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387 * |
8cec8f536af3
All D sources complete gvim retab (4 spaces), bug with Composite moveAbove/moveBelow fixed.
Frank Benoit <benoit@tionex.de>
parents:
42
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changeset
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388 * @since 3.0 |
8cec8f536af3
All D sources complete gvim retab (4 spaces), bug with Composite moveAbove/moveBelow fixed.
Frank Benoit <benoit@tionex.de>
parents:
42
diff
changeset
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389 */ |
8cec8f536af3
All D sources complete gvim retab (4 spaces), bug with Composite moveAbove/moveBelow fixed.
Frank Benoit <benoit@tionex.de>
parents:
42
diff
changeset
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390 public void textSelectionChanged () { |
8cec8f536af3
All D sources complete gvim retab (4 spaces), bug with Composite moveAbove/moveBelow fixed.
Frank Benoit <benoit@tionex.de>
parents:
42
diff
changeset
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391 checkWidget (); |
8cec8f536af3
All D sources complete gvim retab (4 spaces), bug with Composite moveAbove/moveBelow fixed.
Frank Benoit <benoit@tionex.de>
parents:
42
diff
changeset
|
392 if (accessibleObject !is null) { |
8cec8f536af3
All D sources complete gvim retab (4 spaces), bug with Composite moveAbove/moveBelow fixed.
Frank Benoit <benoit@tionex.de>
parents:
42
diff
changeset
|
393 accessibleObject.textSelectionChanged (); |
8cec8f536af3
All D sources complete gvim retab (4 spaces), bug with Composite moveAbove/moveBelow fixed.
Frank Benoit <benoit@tionex.de>
parents:
42
diff
changeset
|
394 } |
8cec8f536af3
All D sources complete gvim retab (4 spaces), bug with Composite moveAbove/moveBelow fixed.
Frank Benoit <benoit@tionex.de>
parents:
42
diff
changeset
|
395 } |
42 | 396 } |