PanelAccImpl

套件	spark.accessibility
類別	public class PanelAccImpl
繼承	PanelAccImpl AccImpl AccessibilityImplementation Object
子類別	TitleWindowAccImpl

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

PanelAccImpl is the accessibility implementation class for spark.components.Panel.

When a Spark Panel is created, the accessibilityImplementation property of a special child Sprite 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 Panel. See the mx.accessibility.AccImpl and flash.accessibility.AccessibilityImplementation classes for background information about accessibility implementation classes and MSAA.

Children

A Panel has no MSAA children. All children of the actual Panel are siblings of the Panel in the FlashPlayer's MSAA tree, because Flash Player does not support objects with accessibility implementations having children with their own accessibility implementations.

The PanelAccImpl is set as the accessibilityImplementation of the titleDisplay object because setting it on the Panel itself would not allow the Panel's children to be exposed in MSAA. Because of this an invisible rectangle is drawn in the titleDisplay making it the same size as the Panel as a whole so that the MSAA Location is the bounding rectangle of the entire Panel. Screen readers like JAWS rely on the MSAA Location to announce whether some component is in the grouping since the MSAA structure is flat.

Role

The MSAA Role of a Panel is ROLE_SYSTEM_GROUPING.

Name

The MSAA Name of a Panel is, by default, the title that it displays. To override this behavior, set the Panel's accessibilityName property.

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

Description

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

State

The MSAA State of a Panel is always STATE_SYSTEM_NORMAL, indicating that no state flags are set.

Since the state does not change, a Panel does not dispatch the MSAA event EVENT_OBJECT_STATECHANGE.

Value

The MSAA Value of a Panel is always the empty string.

Location

The MSAA Location of a Panel is its bounding rectangle.

Default Action

A Panel does not have an MSAA DefaultAction .

Focus

A Panel does not accept focus.

Selection

A Panel 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
		PanelAccImpl(master:UIComponent) Constructor.	PanelAccImpl
		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 Panel class.	PanelAccImpl
		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 PanelAccImpl(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 Panel class.

This method is called by application startup code that is autogenerated by the MXML compiler. Afterwards, when instances of Panel are initialized, the accessibilityImplementation property of a special first child Sprite will be set to an instance of this class. If the PanelAccImpl were attached to the Panel itself the accessibility implementations of the Panel's children would be ignored.

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PanelAccImpl - AS3 Flex

類別 x

PanelAccImpl

enableAccessibility