Mercurial > projects > dwt-linux
annotate dwt/accessibility/Accessible.d @ 72:5899e0b43e5d
porting notice
author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 15 Jan 2008 07:20:20 +0100 |
parents | 295b29fc7d13 |
children | c0d810de7093 |
rev | line source |
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72 | 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 | |
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 | |
48 * | |
49 * @since 2.0 | |
50 */ | |
51 public class Accessible { | |
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52 AccessibleListener[] accessibleListeners; |
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53 AccessibleControlListener[] controlListeners; |
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54 AccessibleTextListener[] textListeners; |
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55 AccessibleObject accessibleObject; |
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56 Control control; |
42 | 57 |
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58 this (Control control) { |
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59 this.control = control; |
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60 AccessibleFactory.registerAccessible (this); |
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61 control.addDisposeListener (new class () DisposeListener { |
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62 public void widgetDisposed (DisposeEvent e) { |
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63 release (); |
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64 } |
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65 }); |
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66 } |
42 | 67 |
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68 /** |
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69 * Adds the listener to the collection of listeners who will |
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70 * be notified when an accessible client asks for certain strings, |
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71 * such as name, description, help, or keyboard shortcut. The |
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72 * listener is notified by sending it one of the messages defined |
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73 * in the <code>AccessibleListener</code> interface. |
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74 * |
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75 * @param listener the listener that should be notified when the receiver |
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76 * is asked for a name, description, help, or keyboard shortcut string |
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77 * |
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78 * @exception IllegalArgumentException <ul> |
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79 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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80 * </ul> |
71 | 81 * @exception DWTException <ul> |
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82 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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83 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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84 * </ul> |
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85 * |
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86 * @see AccessibleListener |
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87 * @see #removeAccessibleListener |
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88 */ |
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89 public void addAccessibleListener (AccessibleListener listener) { |
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90 checkWidget (); |
71 | 91 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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92 accessibleListeners ~= listener; |
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93 } |
42 | 94 |
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95 /** |
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96 * Adds the listener to the collection of listeners who will |
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97 * be notified when an accessible client asks for custom control |
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98 * specific information. The listener is notified by sending it |
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99 * one of the messages defined in the <code>AccessibleControlListener</code> |
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100 * interface. |
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101 * |
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102 * @param listener the listener that should be notified when the receiver |
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103 * is asked for custom control specific information |
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104 * |
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105 * @exception IllegalArgumentException <ul> |
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106 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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107 * </ul> |
71 | 108 * @exception DWTException <ul> |
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109 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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110 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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111 * </ul> |
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112 * |
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113 * @see AccessibleControlListener |
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114 * @see #removeAccessibleControlListener |
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115 */ |
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116 public void addAccessibleControlListener (AccessibleControlListener listener) { |
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117 checkWidget (); |
71 | 118 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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119 controlListeners ~= listener; |
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120 } |
42 | 121 |
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122 /** |
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123 * Adds the listener to the collection of listeners who will |
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124 * be notified when an accessible client asks for custom text control |
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125 * specific information. The listener is notified by sending it |
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126 * one of the messages defined in the <code>AccessibleTextListener</code> |
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127 * interface. |
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128 * |
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129 * @param listener the listener that should be notified when the receiver |
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130 * is asked for custom text control specific information |
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131 * |
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132 * @exception IllegalArgumentException <ul> |
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133 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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134 * </ul> |
71 | 135 * @exception DWTException <ul> |
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136 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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137 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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138 * </ul> |
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139 * |
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140 * @see AccessibleTextListener |
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141 * @see #removeAccessibleTextListener |
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142 * |
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143 * @since 3.0 |
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144 */ |
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145 public void addAccessibleTextListener (AccessibleTextListener listener) { |
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146 checkWidget (); |
71 | 147 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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148 textListeners ~= listener; |
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149 } |
42 | 150 |
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151 /** |
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152 * Returns the control for this Accessible object. |
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153 * |
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154 * @return the receiver's control |
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155 * @since 3.0 |
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156 */ |
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157 public Control getControl() { |
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158 return control; |
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159 } |
42 | 160 |
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161 /* checkWidget was copied from Widget, and rewritten to work in this package */ |
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162 void checkWidget () { |
71 | 163 if (!isValidThread ()) DWT.error (DWT.ERROR_THREAD_INVALID_ACCESS); |
164 if (control.isDisposed ()) DWT.error (DWT.ERROR_WIDGET_DISPOSED); | |
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165 } |
42 | 166 |
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167 AccessibleListener[] getAccessibleListeners () { |
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168 if (accessibleListeners.length is 0 ) return null; |
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169 return accessibleListeners.dup; |
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170 } |
42 | 171 |
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172 GtkWidget* getControlHandle () { |
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173 return control.handle; |
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174 } |
42 | 175 |
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176 AccessibleControlListener[] getControlListeners () { |
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177 if (controlListeners.length is 0) return null; |
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178 return controlListeners.dup; |
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179 } |
42 | 180 |
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181 AccessibleTextListener[] getTextListeners () { |
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182 if (textListeners.length is 0) return null; |
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183 return textListeners.dup; |
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184 } |
42 | 185 |
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186 /** |
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187 * Invokes platform specific functionality to allocate a new accessible object. |
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188 * <p> |
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189 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public |
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190 * API for <code>Accessible</code>. It is marked public only so that it |
71 | 191 * can be shared within the packages provided by DWT. It is not |
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192 * available on all platforms, and should never be called from |
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193 * application code. |
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194 * </p> |
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195 * |
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196 * @param control the control to get the accessible object for |
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197 * @return the platform specific accessible object |
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198 */ |
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199 public static Accessible internal_new_Accessible (Control control) { |
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200 return new Accessible (control); |
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201 } |
42 | 202 |
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203 /* isValidThread was copied from Widget, and rewritten to work in this package */ |
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204 bool isValidThread () { |
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205 return control.getDisplay ().getThread () is Thread.getThis (); |
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206 } |
42 | 207 |
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208 void release () { |
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209 AccessibleFactory.unregisterAccessible (/*Accessible.*/this); |
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210 if (accessibleObject !is null) { |
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211 accessibleObject.release (); |
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212 accessibleObject = null; |
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213 } |
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214 accessibleListeners = null; |
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215 controlListeners = null; |
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216 textListeners = null; |
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217 } |
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218 /** |
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219 * Removes the listener from the collection of listeners who will |
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220 * be notified when an accessible client asks for custom control |
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221 * specific information. |
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222 * |
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223 * @param listener the listener that should no longer be notified when the receiver |
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224 * is asked for custom control specific information |
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225 * |
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226 * @exception IllegalArgumentException <ul> |
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227 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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228 * </ul> |
71 | 229 * @exception DWTException <ul> |
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230 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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231 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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232 * </ul> |
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233 * |
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234 * @see AccessibleControlListener |
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235 * @see #addAccessibleControlListener |
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236 */ |
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237 public void removeAccessibleControlListener (AccessibleControlListener listener) { |
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238 checkWidget (); |
71 | 239 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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240 remove( controlListeners, listener, delegate bool(AccessibleControlListener a1, AccessibleControlListener a2 ){ return a1 is a2; }); |
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241 } |
42 | 242 |
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243 /** |
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244 * Removes the listener from the collection of listeners who will |
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245 * be notified when an accessible client asks for certain strings, |
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246 * such as name, description, help, or keyboard shortcut. |
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247 * |
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248 * @param listener the listener that should no longer be notified when the receiver |
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249 * is asked for a name, description, help, or keyboard shortcut string |
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250 * |
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251 * @exception IllegalArgumentException <ul> |
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252 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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253 * </ul> |
71 | 254 * @exception DWTException <ul> |
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255 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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256 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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257 * </ul> |
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258 * |
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259 * @see AccessibleListener |
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260 * @see #addAccessibleListener |
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261 */ |
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262 public void removeAccessibleListener (AccessibleListener listener) { |
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263 checkWidget (); |
71 | 264 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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265 remove( accessibleListeners, listener, delegate bool( AccessibleListener a1, AccessibleListener a2 ){ return a1 is a2; }); |
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266 } |
42 | 267 |
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268 /** |
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269 * Removes the listener from the collection of listeners who will |
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270 * be notified when an accessible client asks for custom text control |
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271 * specific information. |
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272 * |
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273 * @param listener the listener that should no longer be notified when the receiver |
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274 * is asked for custom text control specific information |
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275 * |
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276 * @exception IllegalArgumentException <ul> |
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277 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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278 * </ul> |
71 | 279 * @exception DWTException <ul> |
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280 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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281 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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282 * </ul> |
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283 * |
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284 * @see AccessibleTextListener |
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285 * @see #addAccessibleTextListener |
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286 * |
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287 * @since 3.0 |
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288 */ |
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289 public void removeAccessibleTextListener (AccessibleTextListener listener) { |
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290 checkWidget (); |
71 | 291 if (listener is null) DWT.error (DWT.ERROR_NULL_ARGUMENT); |
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292 remove( textListeners, listener, delegate bool(AccessibleTextListener a1, AccessibleTextListener a2 ){ return a1 is a2; }); |
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293 } |
42 | 294 |
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295 /** |
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296 * Sends a message to accessible clients that the child selection |
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297 * within a custom container control has changed. |
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298 * |
71 | 299 * @exception DWTException <ul> |
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300 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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301 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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302 * </ul> |
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303 * |
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304 * @since 3.0 |
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305 */ |
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306 public void selectionChanged () { |
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307 checkWidget (); |
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308 if (accessibleObject !is null) { |
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309 accessibleObject.selectionChanged (); |
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310 } |
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311 } |
42 | 312 |
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313 /** |
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314 * Sends a message to accessible clients indicating that the focus |
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315 * has changed within a custom control. |
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316 * |
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317 * @param childID an identifier specifying a child of the control |
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318 * |
71 | 319 * @exception DWTException <ul> |
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320 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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321 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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322 * </ul> |
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323 */ |
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324 public void setFocus (int childID) { |
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325 checkWidget (); |
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326 if (accessibleObject !is null) { |
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327 accessibleObject.setFocus (childID); |
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328 } |
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329 } |
42 | 330 |
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331 /** |
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332 * Sends a message to accessible clients that the text |
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333 * caret has moved within a custom control. |
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334 * |
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335 * @param index the new caret index within the control |
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336 * |
71 | 337 * @exception DWTException <ul> |
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338 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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339 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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340 * </ul> |
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341 * |
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342 * @since 3.0 |
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343 */ |
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344 public void textCaretMoved (int index) { |
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345 checkWidget (); |
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346 if (accessibleObject !is null) { |
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347 accessibleObject.textCaretMoved (index); |
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348 } |
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349 } |
42 | 350 |
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351 /** |
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352 * Sends a message to accessible clients that the text |
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353 * within a custom control has changed. |
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354 * |
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355 * @param type the type of change, one of <code>ACC.NOTIFY_TEXT_INSERT</code> |
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356 * or <code>ACC.NOTIFY_TEXT_DELETE</code> |
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357 * @param startIndex the text index within the control where the insertion or deletion begins |
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358 * @param length the non-negative length in characters of the insertion or deletion |
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359 * |
71 | 360 * @exception DWTException <ul> |
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361 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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362 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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363 * </ul> |
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364 * |
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365 * @see ACC#TEXT_INSERT |
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366 * @see ACC#TEXT_DELETE |
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367 * |
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368 * @since 3.0 |
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369 */ |
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370 public void textChanged (int type, int startIndex, int length) { |
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371 checkWidget (); |
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372 if (accessibleObject !is null) { |
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373 accessibleObject.textChanged (type, startIndex, length); |
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374 } |
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375 } |
42 | 376 |
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377 /** |
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378 * Sends a message to accessible clients that the text |
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379 * selection has changed within a custom control. |
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380 * |
71 | 381 * @exception DWTException <ul> |
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382 * <li>ERROR_WIDGET_DISPOSED - if the receiver's control has been disposed</li> |
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383 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver's control</li> |
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384 * </ul> |
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385 * |
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386 * @since 3.0 |
8cec8f536af3
All D sources complete gvim retab (4 spaces), bug with Composite moveAbove/moveBelow fixed.
Frank Benoit <benoit@tionex.de>
parents:
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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:
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388 public void textSelectionChanged () { |
8cec8f536af3
All D sources complete gvim retab (4 spaces), bug with Composite moveAbove/moveBelow fixed.
Frank Benoit <benoit@tionex.de>
parents:
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389 checkWidget (); |
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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390 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
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391 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
|
392 } |
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 } |
42 | 394 } |