[1240] | 1 | package gov.va.med.edp.widget.accessibility
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| 2 | {
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| 3 | import gov.va.med.edp.widget.LinkButtonTab;
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| 4 | import gov.va.med.edp.widget.LinkButtonTabBar;
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| 5 |
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| 6 | import mx.accessibility.TabBarAccImpl;
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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 | use namespace mx_internal;
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| 11 |
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| 12 | public class LinkButtonTabBarAccImpl extends TabBarAccImpl
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| 13 | {
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| 14 | private static const MAX_NUM:uint = 100000;
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| 15 |
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| 16 | /**
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| 17 | * @private
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| 18 | * Static variable triggering the hookAccessibility() method.
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| 19 | * This is used for initializing LinkButtonTabBarAccImpl class to hook its
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| 20 | * createAccessibilityImplementation() method to LinkButtonTabBar class
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| 21 | * before it gets called from UIComponent.
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| 22 | */
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| 23 | private static var accessibilityHooked:Boolean = hookAccessibility();
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| 24 |
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| 25 | /**
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| 26 | * @private
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| 27 | * Static method for swapping the createAccessibilityImplementation()
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| 28 | * method of LinkButtonTabBar with LinkButtonTabBarAccImpl class.
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| 29 | */
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| 30 | private static function hookAccessibility():Boolean
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| 31 | {
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| 32 | LinkButtonTabBar.createAccessibilityImplementation =
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| 33 | createAccessibilityImplementation;
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| 34 |
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| 35 | return true;
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| 36 | }
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| 37 |
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| 38 | /**
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| 39 | * @private
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| 40 | * Method for creating the Accessibility class.
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| 41 | * This method is called from UIComponent.
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| 42 | * @review
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| 43 | */
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| 44 | mx_internal static function createAccessibilityImplementation(
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| 45 | component:UIComponent):void
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| 46 | {
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| 47 | component.accessibilityImplementation =
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| 48 | new LinkButtonTabBarAccImpl(component);
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| 49 | }
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| 50 |
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| 51 | /**
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| 52 | * Method call for enabling accessibility for a component.
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| 53 | * This method is required for the compiler to activate
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| 54 | * the accessibility classes for a component.
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| 55 | */
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| 56 | public static function enableAccessibility():void
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| 57 | {
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| 58 | }
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| 59 |
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| 60 | /**
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| 61 | * Constructor.
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| 62 | *
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| 63 | * @param master The UIComponent instance that this AccImpl instance
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| 64 | * is making accessible.
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| 65 | */
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| 66 | public function LinkButtonTabBarAccImpl(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 returning the name of the Tab
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| 74 | * which is spoken out by the screen reader.
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| 75 | *
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| 76 | * @param childID:uint
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| 77 | *
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| 78 | * @return Name:String
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| 79 | */
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| 80 | override protected function getName(childID:uint):String
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| 81 | {
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| 82 | if (childID == 0)
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| 83 | return "View Selector Panel";
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| 84 |
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| 85 | var name:String;
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| 86 |
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| 87 | var tabBar:LinkButtonTabBar = LinkButtonTabBar(master);
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| 88 | // Assuming childID is always ItemID + 1
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| 89 | // because getChildIDArray is not always invoked.
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| 90 | var index:int = childID < MAX_NUM ?
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| 91 | childID - 1 :
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| 92 | childID - MAX_NUM - 1;
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| 93 | //With new version of JAWS, when we add a new child, we get nonsense number
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| 94 | //not caught above. In this case, return last tab.
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| 95 | if (index > tabBar.numChildren || index < 0)
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| 96 | index = tabBar.numChildren -1;
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| 97 | var item:LinkButtonTab = LinkButtonTab(tabBar.getChildAt(index));
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| 98 |
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| 99 | name = item.label;
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| 100 |
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| 101 | if (index == tabBar.selectedIndex)
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| 102 | name += " Tab, Active";
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| 103 | else
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| 104 | name += " Tab";
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| 105 |
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| 106 | return name;
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| 107 | }
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| 108 |
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| 109 | }
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| 110 | }
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