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annotate dwt/accessibility/AccessibleControlAdapter.d @ 13:f565d3a95c0a

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Ported dwt.internal
author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Fri, 22 Aug 2008 16:46:34 +0200
parents 380af2bdd8e5
children d8635bb48c7c
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *
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f565d3a95c0a Ported dwt.internal
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11 * Port to the D programming language:
0
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12 * Jacob Carlborg <jacob.carlborg@gmail.com>
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13 *******************************************************************************/
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14 module dwt.accessibility.AccessibleControlAdapter;
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15
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16 import dwt.dwthelper.utils;
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17 import dwt.accessibility.AccessibleControlListener;
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18 import dwt.accessibility.AccessibleControlEvent;
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19
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20 /**
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21 * This adapter class provides default implementations for the
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22 * methods described by the <code>AccessibleControlListener</code> interface.
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23 * <p>
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24 * Classes that wish to deal with <code>AccessibleControlEvent</code>s can
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25 * extend this class and override only the methods that they are
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26 * interested in.
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27 * </p><p>
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28 * Note: Accessibility clients use child identifiers to specify
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29 * whether they want information about a control or one of its children.
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30 * Child identifiers are increasing integers beginning with 0.
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31 * The identifier CHILDID_SELF represents the control itself.
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32 * When returning a child identifier to a client, you may use CHILDID_NONE
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33 * to indicate that no child or control has the required information.
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34 * </p><p>
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35 * Note: This adapter is typically used by implementors of
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36 * a custom control to provide very detailed information about
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37 * the control instance to accessibility clients.
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38 * </p>
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39 *
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40 * @see AccessibleControlListener
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41 * @see AccessibleControlEvent
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42 *
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43 * @since 2.0
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44 */
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45 public abstract class AccessibleControlAdapter : AccessibleControlListener {
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46
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47 /**
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48 * Sent when an accessibility client requests the identifier
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49 * of the control child at the specified display coordinates.
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50 * The default behavior is to do nothing.
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51 * <p>
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52 * Return the identifier of the child at display point (x, y)
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53 * in the <code>childID</code> field of the event object.
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54 * Return CHILDID_SELF if point (x, y) is in the control itself
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55 * and not in any child. Return CHILDID_NONE if point (x, y)
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56 * is not contained in either the control or any of its children.
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57 * </p>
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58 *
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59 * @param e an event object containing the following fields:<ul>
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60 * <li>x, y [IN] - the specified point in display coordinates</li>
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61 * <li>childID [Typical OUT] - the ID of the child at point, or CHILDID_SELF, or CHILDID_NONE</li>
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62 * <li>accessible [Optional OUT] - the accessible object for the control or child may be returned instead of the childID</li>
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63 * </ul>
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64 */
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65 public void getChildAtPoint (AccessibleControlEvent e) {
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66 }
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67
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68 /**
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69 * Sent when an accessibility client requests the location
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70 * of the control, or the location of a child of the control.
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71 * The default behavior is to do nothing.
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72 * <p>
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73 * Return a rectangle describing the location of the specified
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74 * control or child in the <code>x, y, width, and height</code>
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75 * fields of the event object.
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76 * </p>
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77 *
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78 * @param e an event object containing the following fields:<ul>
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79 * <li>childID [IN] - an identifier specifying the control or one of its children</li>
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80 * <li>x, y, width, height [OUT] - the control or child location in display coordinates</li>
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81 * </ul>
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82 */
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83 public void getLocation (AccessibleControlEvent e) {
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84 }
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85
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86 /**
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87 * Sent when an accessibility client requests the accessible object
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88 * for a child of the control.
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89 * The default behavior is to do nothing.
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90 * <p>
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91 * Return an <code>Accessible</code> for the specified control or
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92 * child in the <code>accessible</code> field of the event object.
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93 * Return null if the specified child does not have its own
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94 * <code>Accessible</code>.
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95 * </p>
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96 *
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97 * @param e an event object containing the following fields:<ul>
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98 * <li>childID [IN] - an identifier specifying a child of the control</li>
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99 * <li>accessible [OUT] - an Accessible for the specified childID, or null if one does not exist</li>
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100 * </ul>
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101 */
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102 public void getChild (AccessibleControlEvent e) {
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103 }
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104
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105 /**
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106 * Sent when an accessibility client requests the number of
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107 * children in the control.
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108 * The default behavior is to do nothing.
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109 * <p>
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110 * Return the number of child items in the <code>detail</code>
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111 * field of the event object.
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112 * </p>
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113 *
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114 * @param e an event object containing the following fields:<ul>
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115 * <li>detail [OUT] - the number of child items in this control</li>
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116 * </ul>
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117 */
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118 public void getChildCount (AccessibleControlEvent e) {
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119 }
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120
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121 /**
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122 * Sent when an accessibility client requests the default action
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123 * of the control, or the default action of a child of the control.
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124 * The default behavior is to do nothing.
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125 * <p>
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126 * This String is typically a verb describing what the user does to it.
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127 * For example, a Push Button's default action is "Press", a Check Button's
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128 * is "Check" or "UnCheck", and List items have the default action "Double Click".
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129 * </p><p>
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130 * Return a String describing the default action of the specified
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131 * control or child in the <code>result</code> field of the event object.
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132 * Returning null tells the client to use the platform default action String.
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133 * </p>
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134 *
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135 * @param e an event object containing the following fields:<ul>
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136 * <li>childID [IN] - an identifier specifying the control or one of its children</li>
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137 * <li>result [OUT] - the requested default action String, or null</li>
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138 * </ul>
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139 */
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140 public void getDefaultAction (AccessibleControlEvent e) {
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141 }
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142
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143 /**
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144 * Sent when an accessibility client requests the identity of
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145 * the child or control that has keyboard focus.
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146 * The default behavior is to do nothing.
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147 * <p>
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148 * Return the identifier of the child that has focus in the
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149 * <code>childID</code> field of the event object.
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150 * Return CHILDID_SELF if the control itself has keyboard focus.
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151 * Return CHILDID_NONE if neither the control nor any of its children has focus.
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152 * </p>
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153 *
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154 * @param e an event object containing the following fields:<ul>
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155 * <li>childID [Typical OUT] - the ID of the child with focus, or CHILDID_SELF, or CHILDID_NONE</li>
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156 * <li>accessible [Optional OUT] - the accessible object for a child may be returned instead of its childID</li>
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157 * </ul>
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158 */
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159 public void getFocus (AccessibleControlEvent e) {
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160 }
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161
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162 /**
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163 * Sent when an accessibility client requests the role
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164 * of the control, or the role of a child of the control.
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165 * The default behavior is to do nothing.
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166 * <p>
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167 * Return a role constant (constant defined in ACC beginning with ROLE_)
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168 * that describes the role of the specified control or child in the
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169 * <code>detail</code> field of the event object.
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170 * </p>
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171 *
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172 * @param e an event object containing the following fields:<ul>
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173 * <li>childID [IN] - an identifier specifying the control or one of its children</li>
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174 * <li>detail [OUT] - a role constant describing the role of the control or child</li>
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175 * </ul>
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176 */
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177 public void getRole (AccessibleControlEvent e) {
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178 }
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179
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180 /**
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181 * Sent when an accessibility client requests the identity of
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182 * the child or control that is currently selected.
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183 * The default behavior is to do nothing.
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184 * <p>
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185 * Return the identifier of the selected child in the
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186 * <code>childID</code> field of the event object.
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187 * Return CHILDID_SELF if the control itself is selected.
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188 * Return CHILDID_MULTIPLE if multiple children are selected, and return an array of childIDs in the <code>children</code> field.
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189 * Return CHILDID_NONE if neither the control nor any of its children are selected.
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190 * </p>
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191 *
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192 * @param e an event object containing the following fields:<ul>
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193 * <li>childID [Typical OUT] - the ID of the selected child, or CHILDID_SELF, or CHILDID_MULTIPLE, or CHILDID_NONE</li>
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194 * <li>accessible [Optional OUT] - the accessible object for the control or child may be returned instead of the childID</li>
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195 * </ul>
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196 */
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197 public void getSelection (AccessibleControlEvent e) {
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198 }
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199
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200 /**
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201 * Sent when an accessibility client requests the state
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202 * of the control, or the state of a child of the control.
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203 * The default behavior is to do nothing.
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204 * <p>
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205 * Return a state mask (mask bit constants defined in ACC beginning with STATE_)
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206 * that describes the current state of the specified control or child in the
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207 * <code>detail</code> field of the event object.
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208 * </p>
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209 *
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210 * @param e an event object containing the following fields:<ul>
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211 * <li>childID [IN] - an identifier specifying the control or one of its children</li>
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212 * <li>detail [OUT] - a state mask describing the current state of the control or child</li>
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213 * </ul>
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214 */
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215 public void getState (AccessibleControlEvent e) {
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216 }
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217
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218 /**
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219 * Sent when an accessibility client requests the value
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220 * of the control, or the value of a child of the control.
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221 * The default behavior is to do nothing.
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222 * <p>
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223 * Many controls do not return a value. Examples of controls
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224 * that do are: Combo returns the text String, Text returns
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225 * its contents, ProgressBar returns a String representing a
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226 * percentage, and Tree items return a String representing
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227 * their level in the tree.
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228 * </p><p>
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229 * Return a String describing the value of the specified control
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230 * or child in the <code>result</code> field of the event object.
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231 * Returning null tells the client to use the platform value String.
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232 * </p>
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233 *
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234 * @param e an event object containing the following fields:<ul>
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235 * <li>childID [IN] - an identifier specifying the control or one of its children</li>
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236 * <li>result [OUT] - the requested value String, or null</li>
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237 * </ul>
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238 */
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239 public void getValue (AccessibleControlEvent e) {
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240 }
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241
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242 /**
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243 * Sent when an accessibility client requests the children of the control.
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244 * The default behavior is to do nothing.
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245 * <p>
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246 * Return the children as an array of childIDs in the <code>children</code>
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247 * field of the event object.
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248 * </p>
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249 *
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250 * @param e an event object containing the following fields:<ul>
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251 * <li>children [Typical OUT] - an array of childIDs</li>
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252 * <li>accessible [Optional OUT] - an array of accessible objects for the children may be returned instead of the childIDs</li>
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253 * </ul>
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254 */
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255 public void getChildren (AccessibleControlEvent e) {
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256 }
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257 }