ButtonAccImpl - Adobe ActionScript® 3 (AS3 Flash) API Reference

Package	fl.accessibility
Class	public class ButtonAccImpl
Inheritance	ButtonAccImpl LabelButtonAccImpl AccImpl AccessibilityImplementation Object

Language Version:

ActionScript 3.0

Product Version:

Flash CS3

Runtime Versions:

Flash Player 9.0.28.0, AIR 1.0

The ButtonAccImpl class, also called the Button Accessibility Implementation class, enables communication between a Button component and a screen reader. Screen readers are used to translate screen content into synthesized speech or braille for visually impaired users.

The ButtonAccImpl class supports system roles, object-based events, and states.

A Button reports the role ROLE_SYSTEM_PUSHBUTTON (0x2B) to a screen reader.

A Button reports the following states to a screen reader:

STATE_SYSTEM_NORMAL (0x00000000)
STATE_SYSTEM_UNAVAILABLE (0x00000001)
STATE_SYSTEM_FOCUSED (0x00000004)
STATE_SYSTEM_PRESSED (0x00000008)
STATE_SYSTEM_FOCUSABLE (0x00100000)

A Button dispatches the following events to a screen reader:

EVENT_OBJECT_STATECHANGE (0x800A)
EVENT_OBJECT_NAMECHANGE (0x800C)

The user of a screen reader can activate a button component by using the spacebar or the Enter key.

Related API Elements

Button

Public Properties

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	Property		Defined By
		constructor : Object A reference to the class object or constructor function for a given object instance.	Object
		errno : uint Indicates an error code.	AccessibilityImplementation
		stub : Boolean Used to create a component accessibility stub.	AccessibilityImplementation

Public Methods

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	Method		Defined By
		accDoDefaultAction(childID:uint):void An IAccessible method that performs the default action associated with the component that this AccessibilityImplementation represents or of one of its child elements.	AccessibilityImplementation
		accLocation(childID:uint):* MSAA method for returning a DisplayObject or Rectangle specifying the bounding box of a child element in the AccessibilityImplementation.	AccessibilityImplementation
		accSelect(operation:uint, childID:uint):void IAccessible method for altering the selection in the component that this AccessibilityImplementation represents.	AccessibilityImplementation
		enableAccessibility():void [static] Enables accessibility for a Button component.	ButtonAccImpl
		get_accDefaultAction(childID:uint):String MSAA method for returning the default action of the component that this AccessibilityImplementation represents or of one of its child elements.	AccessibilityImplementation
		get_accFocus():uint MSAA method for returning the unsigned integer ID of the child element, if any, that has child focus within the component.	AccessibilityImplementation
		get_accName(childID:uint):String MSAA method for returning the name for the component that this AccessibilityImplementation represents or for one of its child elements.	AccessibilityImplementation
		get_accRole(childID:uint):uint MSAA method for returning the system role for the component that this AccessibilityImplementation represents or for one of its child elements.	AccessibilityImplementation
		get_accSelection():Array MSAA method for returning an array containing the IDs of all child elements that are selected.	AccessibilityImplementation
		get_accState(childID:uint):uint IAccessible method for returning the current runtime state of the component that this AccessibilityImplementation represents or of one of its child elements.	AccessibilityImplementation
		get_accValue(childID:uint):String MSAA method for returning the runtime value of the component that this AccessibilityImplementation represents or of one of its child elements.	AccessibilityImplementation
		get_selectionActiveIndex():*	AccessibilityImplementation
		get_selectionAnchorIndex():*	AccessibilityImplementation
		getChildIDArray():Array Returns an array containing the unsigned integer IDs of all child elements in the AccessibilityImplementation.	AccessibilityImplementation
		hasOwnProperty(name:String):Boolean Indicates whether an object has a specified property defined.	Object
		isLabeledBy(labelBounds:Rectangle):Boolean Returns true or false to indicate whether a text object having a bounding box specified by a x, y, width, and height should be considered a label for the component that this AccessibilityImplementation represents.	AccessibilityImplementation
		isPrototypeOf(theClass:Object):Boolean Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.	Object
		propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Sets the availability of a dynamic property for loop operations.	Object
		toLocaleString():String Returns the string representation of this object, formatted according to locale-specific conventions.	Object
		toString():String Returns the string representation of the specified object.	Object
		valueOf():Object Returns the primitive value of the specified object.	Object

Method Detail

enableAccessibility

()

method

public static function enableAccessibility():void