1 | package gov.va.med.edp.widget.accessibility
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2 | {
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3 | import flash.accessibility.Accessibility;
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4 | import flash.events.Event;
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5 |
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6 | import mx.accessibility.AccImpl;
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7 | import mx.core.UIComponent;
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8 | import mx.core.mx_internal;
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9 |
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10 | import gov.va.med.edp.widget.AccessibleNumericStepper;
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11 |
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12 | use namespace mx_internal;
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13 |
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14 | /**
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15 | * The NumericStepperAccImpl class is the accessibility class
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16 | * the numericstepper component.
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17 | *
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18 | * @tiptext This is the NumericStepperAccImpl Accessibility Class.
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19 | * @created by jtorreno 6.2.2008
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20 | */
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21 | public class NumericStepperAccImpl extends AccImpl
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22 | {
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23 |
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24 | /**
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25 | * @private
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26 | * Default role for numericstepper
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27 | */
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28 | private const ROLE_SYSTEM_TEXT:uint = 0x0000002A;
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29 |
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30 | /**
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31 | * @private
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32 | * Default state for all the components.
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33 | */
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34 | private static const STATE_SYSTEM_NORMAL:uint = 0x00000000;
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35 |
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36 | /**
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37 | * @private
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38 | */
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39 | private static const STATE_SYSTEM_FOCUSABLE:uint = 0x00100000;
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40 |
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41 | /**
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42 | * @private
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43 | */
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44 | private static const STATE_SYSTEM_FOCUSED:uint = 0x00000004;
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45 |
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46 | /**
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47 | * @private
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48 | **/
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49 | private static const EVENT_OBJECT_FOCUS:uint = 0x8005;
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50 |
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51 | /**
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52 | * @private
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53 | */
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54 | private static const EVENT_OBJECT_VALUECHANGE:uint = 0x0000800e;
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55 |
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56 | /**
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57 | * @private
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58 | * Accessibility hookup
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59 | */
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60 | private static var accessibilityHooked:Boolean = hookAccessibility();
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61 |
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62 |
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63 | /**
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64 | * Constructor
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65 | */
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66 | public function NumericStepperAccImpl(master:UIComponent)
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67 | {
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68 | super(master);
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69 | }
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70 |
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71 | /**
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72 | * @private
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73 | * Method for creating the Accessibility class.
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74 | * This method is called from UIComponent.
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75 | * @review
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76 | */
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77 | mx_internal static function createAccessibilityImplementation(
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78 | component:UIComponent):void
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79 | {
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80 | component.accessibilityImplementation =
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81 | new NumericStepperAccImpl(component);
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82 | }
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83 |
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84 | /**
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85 | * @private
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86 | * Static method for swapping the createAccessibilityImplementation()
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87 | * method of AccessibleNumericStepper with the NumericStepperAccImpl class.
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88 | */
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89 | private static function hookAccessibility():Boolean
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90 | {
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91 | AccessibleNumericStepper.createAccessibilityImplementation =
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92 | createAccessibilityImplementation;
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93 | return true;
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94 | }
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95 |
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96 | /**
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97 | * Method call for enabling accessibility for a component.
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98 | * this method is required for the compiler to activate
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99 | * the accessibility classes for a component.
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100 | */
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101 | public static function enableAccessibility():void
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102 | {
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103 |
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104 | }
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105 |
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106 | /**
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107 | * @private
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108 | * Method for returning the name of the NumericStepper
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109 | *
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110 | * @param childID uint
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111 | *
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112 | * @return Name String
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113 | * @review
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114 | */
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115 | override protected function getName(childID:uint):String
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116 | {
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117 | var name:String = "";
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118 |
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119 | name = AccessibleNumericStepper(master).name;
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120 |
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121 | return name;
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122 | }
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123 |
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124 | /**
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125 | * @private
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126 | * Method for returning the value of the NumericStepper
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127 | *
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128 | * @param childID uint
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129 | *
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130 | * @return Value String
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131 | * @review
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132 | */
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133 | override public function get_accValue(childID:uint):String
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134 | {
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135 | var accValue:String="";
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136 |
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137 | accValue = AccessibleNumericStepper(master).value.toString();
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138 |
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139 | return accValue;
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140 | }
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141 |
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142 | /**
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143 | * @private
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144 | * IAccessible method for returning the state of the NumericStepper
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145 | *
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146 | * @param childID uint
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147 | *
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148 | * @return State uint
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149 | */
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150 | override public function get_accState(childID:uint):uint
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151 | {
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152 | var accState:uint = STATE_SYSTEM_NORMAL;
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153 |
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154 | if (AccessibleNumericStepper(master).getFocus())
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155 | {
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156 | accState |= STATE_SYSTEM_FOCUSED;
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157 | }
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158 |
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159 | return accState;
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160 | }
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161 |
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162 | /**
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163 | * @private
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164 | * Gets the role for the component.
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165 | *
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166 | * @param childID uint.
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167 | */
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168 | override public function get_accRole(childID:uint):uint
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169 | {
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170 | return ROLE_SYSTEM_TEXT;
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171 | }
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172 |
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173 | /**
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174 | * @private
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175 | * Array of events that we should listen for from the master component.
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176 | */
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177 | override protected function get eventsToHandle():Array
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178 | {
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179 | return super.eventsToHandle.concat(["numericStepperFocused","stepSizeChanged","stepSizeMouseClickChanged"]);
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180 | }
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181 |
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182 | /**
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183 | * @private
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184 | * Override the generic event handler.
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185 | * All AccImpl must implement this to listen for events
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186 | * from its master component.
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187 | */
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188 | override protected function eventHandler(event:Event):void
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189 | {
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190 | //trace("&&&&&&&&&& Event Type: " + event.type);
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191 | switch (event.type)
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192 | {
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193 | /* tell JAWS to update and reread the information */
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194 | case "stepSizeChanged":
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195 | {
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196 | Accessibility.sendEvent(master, 0, EVENT_OBJECT_FOCUS);
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197 | Accessibility.sendEvent(master, 0, EVENT_OBJECT_VALUECHANGE);
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198 | Accessibility.updateProperties();
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199 | break;
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200 | }
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201 | case "stepSizeMouseClickChanged":
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202 | {
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203 | Accessibility.sendEvent(master, 0, EVENT_OBJECT_FOCUS);
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204 | //Accessibility.sendEvent(master, 0, EVENT_OBJECT_STATECHANGE);
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205 | Accessibility.sendEvent(master, 0, EVENT_OBJECT_VALUECHANGE);
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206 | Accessibility.updateProperties();
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207 | break;
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208 | }
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209 | case "numericStepperFocused":
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210 | {
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211 | Accessibility.sendEvent(master, 0, EVENT_OBJECT_FOCUS);
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212 | Accessibility.sendEvent(master, 0, EVENT_OBJECT_VALUECHANGE);
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213 | Accessibility.updateProperties();
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214 | break;
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215 | }
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216 |
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217 | }
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218 | }
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219 |
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220 | }
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221 | }
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