Mercurial > projects > dwt-linux
annotate dwt/accessibility/Accessible.d @ 71:295b29fc7d13
Renamed SWT to DWT
author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 15 Jan 2008 06:44:34 +0100 |
parents | 8cec8f536af3 |
children | 5899e0b43e5d |
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1 /******************************************************************************* |
42 | 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 *******************************************************************************/ | |
11 module dwt.accessibility.Accessible; | |
12 | |
13 import dwt.accessibility.AccessibleListener; | |
14 import dwt.accessibility.AccessibleTextListener; | |
15 import dwt.accessibility.AccessibleControlListener; | |
16 import dwt.accessibility.AccessibleControlListener; | |
17 import dwt.accessibility.AccessibleFactory; | |
18 import dwt.accessibility.AccessibleObject; | |
19 import tango.core.Thread; | |
71 | 20 import dwt.DWT; |
42 | 21 //import dwt.events.*; |
22 import dwt.internal.gtk.OS; | |
23 import dwt.widgets.Control; | |
24 import tango.core.Array; | |
25 import dwt.events.DisposeListener; | |
26 import dwt.events.DisposeEvent; | |
27 | |
28 /** | |
29 * Instances of this class provide a bridge between application | |
30 * code and assistive technology clients. Many platforms provide | |
31 * default accessible behavior for most widgets, and this class | |
32 * allows that default behavior to be overridden. Applications | |
33 * can get the default Accessible object for a control by sending | |
34 * it <code>getAccessible</code>, and then add an accessible listener | |
35 * to override simple items like the name and help string, or they | |
36 * can add an accessible control listener to override complex items. | |
37 * As a rule of thumb, an application would only want to use the | |
38 * accessible control listener to implement accessibility for a | |
39 * custom control. | |
40 * | |
41 * @see Control#getAccessible | |
42 * @see AccessibleListener | |
43 * @see AccessibleEvent | |
44 * @see AccessibleControlListener | |
45 * @see AccessibleControlEvent | |
46 * | |
47 * @since 2.0 | |
48 */ | |
49 public class Accessible { | |
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50 AccessibleListener[] accessibleListeners; |
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51 AccessibleControlListener[] controlListeners; |
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52 AccessibleTextListener[] textListeners; |
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53 AccessibleObject accessibleObject; |
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54 Control control; |
42 | 55 |
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56 this (Control control) { |
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57 this.control = control; |
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58 AccessibleFactory.registerAccessible (this); |
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59 control.addDisposeListener (new class () DisposeListener { |
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60 public void widgetDisposed (DisposeEvent e) { |
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61 release (); |
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62 } |
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63 }); |
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64 } |
42 | 65 |
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66 /** |
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67 * Adds the listener to the collection of listeners who will |
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68 * be notified when an accessible client asks for certain strings, |
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69 * such as name, description, help, or keyboard shortcut. The |
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70 * listener is notified by sending it one of the messages defined |
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71 * in the <code>AccessibleListener</code> interface. |
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72 * |
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73 * @param listener the listener that should be notified when the receiver |
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74 * is asked for a name, description, help, or keyboard shortcut string |
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75 * |
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76 * @exception IllegalArgumentException <ul> |
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77 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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78 * </ul> |
71 | 79 * @exception DWTException <ul> |
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80 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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81 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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82 * </ul> |
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83 * |
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84 * @see AccessibleListener |
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85 * @see #removeAccessibleListener |
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86 */ |
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87 public void addAccessibleListener (AccessibleListener listener) { |
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88 checkWidget (); |
71 | 89 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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90 accessibleListeners ~= listener; |
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91 } |
42 | 92 |
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93 /** |
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94 * Adds the listener to the collection of listeners who will |
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95 * be notified when an accessible client asks for custom control |
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96 * specific information. The listener is notified by sending it |
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97 * one of the messages defined in the <code>AccessibleControlListener</code> |
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98 * interface. |
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99 * |
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100 * @param listener the listener that should be notified when the receiver |
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101 * is asked for custom control specific information |
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102 * |
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103 * @exception IllegalArgumentException <ul> |
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104 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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105 * </ul> |
71 | 106 * @exception DWTException <ul> |
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107 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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108 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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109 * </ul> |
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110 * |
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111 * @see AccessibleControlListener |
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112 * @see #removeAccessibleControlListener |
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113 */ |
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114 public void addAccessibleControlListener (AccessibleControlListener listener) { |
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115 checkWidget (); |
71 | 116 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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117 controlListeners ~= listener; |
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118 } |
42 | 119 |
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120 /** |
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121 * Adds the listener to the collection of listeners who will |
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122 * be notified when an accessible client asks for custom text control |
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123 * specific information. The listener is notified by sending it |
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124 * one of the messages defined in the <code>AccessibleTextListener</code> |
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125 * interface. |
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126 * |
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127 * @param listener the listener that should be notified when the receiver |
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128 * is asked for custom text control specific information |
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129 * |
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130 * @exception IllegalArgumentException <ul> |
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131 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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132 * </ul> |
71 | 133 * @exception DWTException <ul> |
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134 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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135 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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136 * </ul> |
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137 * |
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138 * @see AccessibleTextListener |
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139 * @see #removeAccessibleTextListener |
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140 * |
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141 * @since 3.0 |
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142 */ |
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143 public void addAccessibleTextListener (AccessibleTextListener listener) { |
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144 checkWidget (); |
71 | 145 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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146 textListeners ~= listener; |
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147 } |
42 | 148 |
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149 /** |
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150 * Returns the control for this Accessible object. |
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151 * |
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152 * @return the receiver's control |
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153 * @since 3.0 |
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154 */ |
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155 public Control getControl() { |
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156 return control; |
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157 } |
42 | 158 |
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159 /* checkWidget was copied from Widget, and rewritten to work in this package */ |
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160 void checkWidget () { |
71 | 161 if (!isValidThread ()) DWT.error (DWT.ERROR_THREAD_INVALID_ACCESS); |
162 if (control.isDisposed ()) DWT.error (DWT.ERROR_WIDGET_DISPOSED); | |
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163 } |
42 | 164 |
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165 AccessibleListener[] getAccessibleListeners () { |
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166 if (accessibleListeners.length is 0 ) return null; |
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167 return accessibleListeners.dup; |
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168 } |
42 | 169 |
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170 GtkWidget* getControlHandle () { |
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171 return control.handle; |
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172 } |
42 | 173 |
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174 AccessibleControlListener[] getControlListeners () { |
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175 if (controlListeners.length is 0) return null; |
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176 return controlListeners.dup; |
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177 } |
42 | 178 |
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179 AccessibleTextListener[] getTextListeners () { |
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180 if (textListeners.length is 0) return null; |
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181 return textListeners.dup; |
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182 } |
42 | 183 |
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184 /** |
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185 * Invokes platform specific functionality to allocate a new accessible object. |
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186 * <p> |
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187 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public |
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188 * API for <code>Accessible</code>. It is marked public only so that it |
71 | 189 * can be shared within the packages provided by DWT. It is not |
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190 * available on all platforms, and should never be called from |
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191 * application code. |
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192 * </p> |
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193 * |
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194 * @param control the control to get the accessible object for |
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195 * @return the platform specific accessible object |
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196 */ |
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197 public static Accessible internal_new_Accessible (Control control) { |
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198 return new Accessible (control); |
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199 } |
42 | 200 |
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201 /* isValidThread was copied from Widget, and rewritten to work in this package */ |
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202 bool isValidThread () { |
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203 return control.getDisplay ().getThread () is Thread.getThis (); |
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204 } |
42 | 205 |
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206 void release () { |
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207 AccessibleFactory.unregisterAccessible (/*Accessible.*/this); |
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208 if (accessibleObject !is null) { |
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209 accessibleObject.release (); |
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210 accessibleObject = null; |
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211 } |
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212 accessibleListeners = null; |
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213 controlListeners = null; |
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214 textListeners = null; |
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215 } |
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216 /** |
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217 * Removes the listener from the collection of listeners who will |
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218 * be notified when an accessible client asks for custom control |
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219 * specific information. |
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220 * |
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221 * @param listener the listener that should no longer be notified when the receiver |
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222 * is asked for custom control specific information |
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223 * |
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224 * @exception IllegalArgumentException <ul> |
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225 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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226 * </ul> |
71 | 227 * @exception DWTException <ul> |
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228 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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229 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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230 * </ul> |
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231 * |
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232 * @see AccessibleControlListener |
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233 * @see #addAccessibleControlListener |
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234 */ |
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235 public void removeAccessibleControlListener (AccessibleControlListener listener) { |
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236 checkWidget (); |
71 | 237 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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238 remove( controlListeners, listener, delegate bool(AccessibleControlListener a1, AccessibleControlListener a2 ){ return a1 is a2; }); |
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239 } |
42 | 240 |
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241 /** |
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242 * Removes the listener from the collection of listeners who will |
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243 * be notified when an accessible client asks for certain strings, |
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244 * such as name, description, help, or keyboard shortcut. |
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245 * |
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246 * @param listener the listener that should no longer be notified when the receiver |
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247 * is asked for a name, description, help, or keyboard shortcut string |
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248 * |
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249 * @exception IllegalArgumentException <ul> |
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250 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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251 * </ul> |
71 | 252 * @exception DWTException <ul> |
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253 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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254 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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255 * </ul> |
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256 * |
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257 * @see AccessibleListener |
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258 * @see #addAccessibleListener |
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259 */ |
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260 public void removeAccessibleListener (AccessibleListener listener) { |
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261 checkWidget (); |
71 | 262 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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263 remove( accessibleListeners, listener, delegate bool( AccessibleListener a1, AccessibleListener a2 ){ return a1 is a2; }); |
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264 } |
42 | 265 |
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266 /** |
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267 * Removes the listener from the collection of listeners who will |
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268 * be notified when an accessible client asks for custom text control |
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269 * specific information. |
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270 * |
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271 * @param listener the listener that should no longer be notified when the receiver |
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272 * is asked for custom text control specific information |
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273 * |
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274 * @exception IllegalArgumentException <ul> |
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275 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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276 * </ul> |
71 | 277 * @exception DWTException <ul> |
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278 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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279 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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280 * </ul> |
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281 * |
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282 * @see AccessibleTextListener |
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283 * @see #addAccessibleTextListener |
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284 * |
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285 * @since 3.0 |
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286 */ |
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287 public void removeAccessibleTextListener (AccessibleTextListener listener) { |
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288 checkWidget (); |
71 | 289 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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290 remove( textListeners, listener, delegate bool(AccessibleTextListener a1, AccessibleTextListener a2 ){ return a1 is a2; }); |
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291 } |
42 | 292 |
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293 /** |
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294 * Sends a message to accessible clients that the child selection |
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295 * within a custom container control has changed. |
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296 * |
71 | 297 * @exception DWTException <ul> |
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298 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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299 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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300 * </ul> |
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301 * |
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302 * @since 3.0 |
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303 */ |
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304 public void selectionChanged () { |
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305 checkWidget (); |
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306 if (accessibleObject !is null) { |
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307 accessibleObject.selectionChanged (); |
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308 } |
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309 } |
42 | 310 |
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311 /** |
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312 * Sends a message to accessible clients indicating that the focus |
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313 * has changed within a custom control. |
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314 * |
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315 * @param childID an identifier specifying a child of the control |
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316 * |
71 | 317 * @exception DWTException <ul> |
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318 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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319 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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320 * </ul> |
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321 */ |
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322 public void setFocus (int childID) { |
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323 checkWidget (); |
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324 if (accessibleObject !is null) { |
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325 accessibleObject.setFocus (childID); |
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326 } |
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327 } |
42 | 328 |
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329 /** |
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330 * Sends a message to accessible clients that the text |
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331 * caret has moved within a custom control. |
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332 * |
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333 * @param index the new caret index within the control |
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334 * |
71 | 335 * @exception DWTException <ul> |
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336 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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337 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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338 * </ul> |
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339 * |
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340 * @since 3.0 |
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341 */ |
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342 public void textCaretMoved (int index) { |
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343 checkWidget (); |
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344 if (accessibleObject !is null) { |
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345 accessibleObject.textCaretMoved (index); |
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346 } |
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347 } |
42 | 348 |
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349 /** |
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350 * Sends a message to accessible clients that the text |
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351 * within a custom control has changed. |
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352 * |
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353 * @param type the type of change, one of <code>ACC.NOTIFY_TEXT_INSERT</code> |
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354 * or <code>ACC.NOTIFY_TEXT_DELETE</code> |
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355 * @param startIndex the text index within the control where the insertion or deletion begins |
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356 * @param length the non-negative length in characters of the insertion or deletion |
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357 * |
71 | 358 * @exception DWTException <ul> |
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359 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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360 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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361 * </ul> |
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362 * |
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363 * @see ACC#TEXT_INSERT |
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364 * @see ACC#TEXT_DELETE |
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365 * |
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366 * @since 3.0 |
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367 */ |
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368 public void textChanged (int type, int startIndex, int length) { |
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369 checkWidget (); |
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370 if (accessibleObject !is null) { |
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371 accessibleObject.textChanged (type, startIndex, length); |
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372 } |
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373 } |
42 | 374 |
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375 /** |
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376 * Sends a message to accessible clients that the text |
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377 * selection has changed within a custom control. |
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378 * |
71 | 379 * @exception DWTException <ul> |
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380 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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381 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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382 * </ul> |
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383 * |
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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384 * @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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385 */ |
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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386 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
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changeset
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387 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
|
388 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
|
389 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
|
390 } |
8cec8f536af3
All D sources complete gvim retab (4 spaces), bug with Composite moveAbove/moveBelow fixed.
Frank Benoit <benoit@tionex.de>
parents:
42
diff
changeset
|
391 } |
42 | 392 } |