CheckBoxAccImpl

套件	spark.accessibility
類別	public class CheckBoxAccImpl
繼承	CheckBoxAccImpl ButtonBaseAccImpl AccImpl AccessibilityImplementation Object
子類別	RadioButtonAccImpl

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

CheckBoxAccImpl is the accessibility implementation class for spark.components.CheckBox.

When a Spark CheckBox is created, its accessibilityImplementation property is set to an instance of this class. The Flash Player then uses this class to allow MSAA clients such as screen readers to see and manipulate the CheckBox. See the mx.accessibility.AccImpl and flash.accessibility.AccessibilityImplementation classes for background information about accessibility implementation classes and MSAA.

Children

A CheckBox has no MSAA children.

Role

The MSAA Role of a CheckBox is ROLE_SYSTEM_CHECKBOX.

Name

The MSAA Name of a CheckBox is, by default, the label that it displays. When wrapped in a FormItem element, this label will be combined with the FormItem's label. To override this behavior, set the CheckBox's accessibilityName property.

When the Name changes, a CheckBox dispatches the MSAA event EVENT_OBJECT_NAMECHANGE.

Description

The MSAA Description of a CheckBox is, by default, the empty string, but you can set the CheckBox's accessibilityDescription property.

State

The MSAA State of a CheckBox is a combination of:

STATE_SYSTEM_UNAVAILABLE (when enabled is false)
STATE_SYSTEM_FOCUSABLE (when enabled is true)
STATE_SYSTEM_FOCUSED (when enabled is true and the CheckBox has focus)
STATE_SYSTEM_CHECKED (when selected is true)

When the Name changes, a CheckBox dispatches the MSAA event EVENT_OBJECT_STATECHANGE.

Value

A CheckBox does not have an MSAA Value.

Location

The MSAA Location of a CheckBox is its bounding rectangle.

Default Action

The MSAA DefaultAction of a CheckBox is "Check" or "UnCheck", depending on whether it is currently checked or not.

When an MSAA client tells the CheckBox to perform this action, KEY_DOWN and KEY_UP MouseEvents for the SPACE key are generated, to simulate pressing the CheckBox via the keyboard, if the CheckBox is enabled.

Focus

A CheckBox accepts focus. When it does so, it dispatches the MSAA event EVENT_OBJECT_FOCUS.

Selection

A CheckBox does not support selection in the MSAA sense.

公用屬性

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	屬性		定義自
		constructor : Object 類別物件的參照或是特定物件實體的建構函數。	Object
		errno : uint 指出錯誤碼。	AccessibilityImplementation
		stub : Boolean 用於建立組件輔助功能虛設常式。	AccessibilityImplementation

保護屬性

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	屬性		定義自
		eventsToHandle : Array [唯讀] All subclasses must override this function by returning an array of strings of the events to listen for.	AccImpl
		master : UIComponent A reference to the UIComponent instance that this AccImpl instance is making accessible.	AccImpl
		role : uint Accessibility role of the component being made accessible.	AccImpl

公用方法

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	方法		定義自
		CheckBoxAccImpl(master:UIComponent) Constructor.	CheckBoxAccImpl
		accDoDefaultAction(childID:uint):void IAccessible 方法會執行與組件關聯的預設動作，而該組件是由此 AccessibilityImplementation 或其子元素之一所代表。	AccessibilityImplementation
		accLocation(childID:uint):* MSAA 方法適用於傳回 DisplayObject 或 Rectangle，以便在 AccessibilityImplementation 中指定子系元素的範圍框。	AccessibilityImplementation
		accSelect(operation:uint, childID:uint):void 用於改變組件中之選擇的 IAccessible 方法，該組件是由此 AccessibilityImplementation 所代表。	AccessibilityImplementation
		enableAccessibility():void [靜態] Enables accessibility in the CheckBox class.	CheckBoxAccImpl
		get_accDefaultAction(childID:uint):String 傳回組件預設動作的 MSAA 方法，該組件是由此 AccessibilityImplementation 或其子元素之一所代表。	AccessibilityImplementation
		get_accFocus():uint 傳回子元素 (如果有的話) 無正負號整數 ID 的 MSAA 方法，該子元素在組件中具有子元素焦點。	AccessibilityImplementation
		get_accName(childID:uint):String 傳回組件名稱的 MSAA 方法，該組件是由此 AccessibilityImplementation 或其子元素之一所代表。	AccessibilityImplementation
		get_accRole(childID:uint):uint 傳回組件系統角色的 MSAA 方法，該組件是由此 AccessibilityImplementation 或其子元素之一所代表。	AccessibilityImplementation
		get_accSelection():Array 傳回陣列的 MSAA 方法，該陣列包含所有選取子元素的 ID。	AccessibilityImplementation
		get_accState(childID:uint):uint 傳回組件目前執行階段狀態的 IAccessible 方法，該組件是由此 AccessibilityImplementation 或其子元素之一所代表。	AccessibilityImplementation
		get_accValue(childID:uint):String 傳回組件執行階段值的 MSAA 方法，該組件是由此 AccessibilityImplementation 或其子元素之一所代表。	AccessibilityImplementation
		get_selectionActiveIndex():*	AccessibilityImplementation
		get_selectionAnchorIndex():*	AccessibilityImplementation
		getChildIDArray():Array 傳回陣列，其中包含 AccessibilityImplementation 所有子元素的無正負號整數 ID。	AccessibilityImplementation
		getFormName(component:UIComponent):String [靜態] Method for supporting Form Accessibility.	AccImpl
		hasOwnProperty(name:String):Boolean 指出物件是否有已定義的指定屬性。	Object
		isAncestorDisabled(component:UIComponent):Boolean [靜態] Returns true if an ancestor of the component has enabled set to false.	AccImpl
		isLabeledBy(labelBounds:Rectangle):Boolean 傳回 true 或 false，以指出具有由 x、y、width 與 height 所指定之範圍框的文字物件，是否應該被視為此 AccessibilityImplementation 所代表之組件的標籤。	AccessibilityImplementation
		isPrototypeOf(theClass:Object):Boolean 指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。	Object
		propertyIsEnumerable(name:String):Boolean 指出指定的屬性是否存在，以及是否可列舉。	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void 為迴圈作業設定動態屬性的可用性。	Object
		toLocaleString():String 傳回代表此物件的字串，根據地區特定慣例進行格式化。	Object
		toString():String 會傳回指定之物件的字串形式。	Object
		valueOf():Object 會傳回指定之物件的基本值。	Object

保護方法

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	方法		定義自
		eventHandler(event:Event):void Generic event handler.	AccImpl
		getName(childID:uint):String Returns the name of the accessible component.	AccImpl
		getState(childID:uint):uint Utility method to determine state of the accessible component.	AccImpl

建構函式詳細資料

()

建構函式

public function CheckBoxAccImpl(master:UIComponent)

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

Constructor.

參數

master:UIComponent — The UIComponent instance that this AccImpl instance is making accessible.

方法詳細資訊

enableAccessibility

()

方法

public static function enableAccessibility():void

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

Enables accessibility in the CheckBox class.

This method is called by application startup code that is autogenerated by the MXML compiler. Afterwards, when instances of CheckBox are initialized, their accessibilityImplementation property will be set to an instance of this class.

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CheckBoxAccImpl - AS3 Flex

類別 x

CheckBoxAccImpl

enableAccessibility