TreeEvent

套件	mx.events
類別	public class TreeEvent
繼承	TreeEvent Event Object

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

Flash Player 9, AIR 1.1

The TreeEvent class represents the event object passed to the event listener for events that are associated with activities in tree, such as when a tree branch opens or closes.

相關 API 元素

mx.controls.Tree

公用屬性

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	屬性		定義自
		animate : Boolean Whether to animate an opening or closing operation; used for ITEM_OPENING type events only.	TreeEvent
		bubbles : Boolean [唯讀] 指出事件是否為反昇事件。	Event
		cancelable : Boolean [唯讀] 指出是否可避免與事件相關聯的行為指令。	Event
		constructor : Object 類別物件的參照或是特定物件實體的建構函數。	Object
		currentTarget : Object [唯讀] 正主動使用事件偵聽程式處理 Event 物件的物件。	Event
		dispatchEvent : Boolean Whether to dispatch an event (ITEM_OPEN or ITEM_CLOSE) after the open or close animation is complete.	TreeEvent
		eventPhase : uint [唯讀] 事件流程中的目前階段。	Event
		item : Object Storage for the item property.	TreeEvent
		itemRenderer : IListItemRenderer The ListItemRenderer for the node that closed or opened.	TreeEvent
		opening : Boolean Used for an ITEM_OPENING type events only.	TreeEvent
		target : Object [唯讀] 事件目標。	Event
		triggerEvent : Event The low level MouseEvent or KeyboardEvent that triggered this event or null if this event was triggered programatically.	TreeEvent
		type : String [唯讀] 事件類型。	Event

公用方法

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	方法		定義自
		TreeEvent(type:String, bubbles:Boolean = false, cancelable:Boolean = false, item:Object = null, itemRenderer:IListItemRenderer = null, triggerEvent:Event = null) Constructor.	TreeEvent
		clone():Event 複製 Event 子類別的實體。	Event
		formatToString(className:String, ... arguments):String 公用程式函數，可用來實作自訂 ActionScript 3.0 Event 類別中的 toString() 方法。	Event
		hasOwnProperty(name:String):Boolean 指出物件是否有已定義的指定屬性。	Object
		isDefaultPrevented():Boolean 檢查是否已經對事件呼叫 preventDefault() 方法。	Event
		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
		preventDefault():void 如果可以取消事件的預設行為指令，則取消該行為指令。	Event
		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
		stopImmediatePropagation():void 避免處理事件流程中，目前節點以及任何後續節點中的任何事件偵聽程式。	Event
		stopPropagation():void 避免處理接續在事件流程中的目前節點之後，後續節點中的任何事件偵聽程式。	Event
		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 傳回包含 Event 物件所有屬性的字串。	Event
		valueOf():Object 會傳回指定之物件的基本值。	Object

公用常數

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	常數		定義自
		ITEM_CLOSE : String = "itemClose" [靜態] The TreeEvent.ITEM_CLOSE event type constant indicates that a tree branch closed or collapsed.	TreeEvent
		ITEM_OPEN : String = "itemOpen" [靜態] The TreeEvent.ITEM_OPEN event type constant indicates that a tree branch opened or expanded.	TreeEvent
		ITEM_OPENING : String = "itemOpening" [靜態] The TreeEvent.ITEM_OPENING event type constant is dispatched immediately before a tree opens or closes.	TreeEvent

屬性詳細資訊

animate

屬性

public var animate:Boolean

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

Flash Player 9, AIR 1.1

Whether to animate an opening or closing operation; used for ITEM_OPENING type events only.

dispatchEvent

屬性

public var dispatchEvent:Boolean

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

Flash Player 9, AIR 1.1

Whether to dispatch an event (ITEM_OPEN or ITEM_CLOSE) after the open or close animation is complete. Used for ITEM_OPENING type events only.

item

屬性

public var item:Object

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

Flash Player 9, AIR 1.1

Storage for the item property. If you populate the Tree from XML data, access the properties for the node as event.item.@attribute_name.

itemRenderer

屬性

public var itemRenderer:IListItemRenderer

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

Flash Player 9, AIR 1.1

The ListItemRenderer for the node that closed or opened.

opening

屬性

public var opening:Boolean

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

Flash Player 9, AIR 1.1

Used for an ITEM_OPENING type events only. Indicates whether the item is opening true, or closing false.

triggerEvent

屬性

public var triggerEvent:Event

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

Flash Player 9, AIR 1.1

The low level MouseEvent or KeyboardEvent that triggered this event or null if this event was triggered programatically.

建構函式詳細資料

()

建構函式

public function TreeEvent(type:String, bubbles:Boolean = false, cancelable:Boolean = false, item:Object = null, itemRenderer:IListItemRenderer = null, triggerEvent:Event = null)

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

Flash Player 9, AIR 1.1

Constructor. Normally called by the Flex Tree control; not used in application code.

參數

	`type:String` — The event type; indicates the action that caused the event.

	`bubbles:Boolean` (default = `false`) — Specifies whether the event can bubble up the display list hierarchy.

	`cancelable:Boolean` (default = `false`) — Specifies whether the behavior associated with the event can be prevented.

	`item:Object` (default = `null`) — The Tree node (item) to which this event applies.

	`itemRenderer:IListItemRenderer` (default = `null`) — The item renderer object for the cell.

	`triggerEvent:Event` (default = `null`) — If the node opened or closed in response to a user action, indicates the type of input action.

常數詳細資訊

ITEM_CLOSE

常數

public static const ITEM_CLOSE:String = "itemClose"

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

Flash Player 9, AIR 1.1

The TreeEvent.ITEM_CLOSE event type constant indicates that a tree branch closed or collapsed.

The properties of the event object for this event type have the following values. Not all properties are meaningful for all kinds of events. See the detailed property descriptions for more information.

Property	Value
`itemRenderer`	The ListItemRenderer for the node that closed
`bubbles`	false
`cancelable`	false
`currentTarget`	The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`triggerEvent`	If the node closed in response to a user action, identifies it as a keyboard action or a mouse action.
`item`	the Tree item (node) that closed
`target`	The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.
`type`	TreeEvent.ITEM_CLOSE

ITEM_OPEN

常數

public static const ITEM_OPEN:String = "itemOpen"

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

Flash Player 9, AIR 1.1

The TreeEvent.ITEM_OPEN event type constant indicates that a tree branch opened or expanded.

Property	Value
`itemRenderer`	The ListItemRenderer for the item (node) that opened
`bubbles`	false
`cancelable`	false
`currentTarget`	The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`triggerEvent`	If the item (node) opened in response to a user action, identifies it as a keyboard action or a mouse action.
`item`	the Tree node that opened.
`target`	The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.
`type`	TreeEvent.ITEM_OPEN

ITEM_OPENING

常數

public static const ITEM_OPENING:String = "itemOpening"

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

Flash Player 9, AIR 1.1

The TreeEvent.ITEM_OPENING event type constant is dispatched immediately before a tree opens or closes.

Property	Value
`animate`	Whether to animate the opening or closing operation.
`bubbles`	false
`cancelable`	true
`currentTarget`	The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`dispatchEvent`	Whether to dispatch an `ITEM_OPEN` or `ITEM_CLOSE` event after the open or close animation is complete. true
`itemRenderer`	The ListItemRenderer for the item (node) that opened
`item`	the Tree node that opened.
`opening`	true if the item is opening, false if it is closing.
`target`	The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.
`triggerEvent`	If the item opened in response to a user action, identifies it as a keyboard action or a mouse action.
`type`	TreeEvent.ITEM_OPENING

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TreeEvent - AS3 Flex

類別 x

animate

dispatchEvent

item

itemRenderer

opening

triggerEvent

TreeEvent

ITEM_CLOSE

ITEM_OPEN

ITEM_OPENING