| 套件 | mx.collections |
| 介面 | public interface IGroupingCollection2 extends IHierarchicalData , IEventDispatcher |
| 實作者 | GroupingCollection2 |
| 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 |
相關 API 元素
隱藏繼承公用方法
顯示繼承公用方法| 方法 | 定義自 | ||
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 | addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
會在 EventDispatcher 物件註冊事件偵聽程式，以便讓偵聽程式收到事件的通知。 | IEventDispatcher | |
If the refresh is performed asynchronously,
cancels the refresh operation and stops the building of the groups. | IGroupingCollection2 | ||
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Returns true if the node can contain children. | IHierarchicalData | |
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會將事件傳送到事件流程。 | IEventDispatcher | |
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Returns an Object representing the node's children. | IHierarchicalData | |
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Returns data from a node. | IHierarchicalData | |
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Returns the root data item. | IHierarchicalData | |
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Returns true if the node has children. | IHierarchicalData | |
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會檢查 EventDispatcher 物件是否有對特定的事件類型註冊偵聽程式。 | IEventDispatcher | |
Applies the grouping to the collection. | IGroupingCollection2 | ||
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會從 EventDispatcher 物件移除偵聽程式。 | IEventDispatcher | |
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檢查此 EventDispatcher 物件是否已註冊事件偵聽程式，或者此物件的任何祖系已為特定事件類型註冊事件偵聽程式。 | IEventDispatcher | |
grouping | 屬性 |
grouping:Grouping| 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 |
The Grouping object applied to the source data.
Setting this property does not automatically refresh the view;
therefore, you must call the refresh() method
after setting this property.
Note: The Flex implementations of IGroupingCollection2 retrieve all items from a remote location before executing grouping.
實作
public function get grouping():Grouping public function set grouping(value:Grouping):voidcancelRefresh | () | 方法 |
public function cancelRefresh():void| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 3 |
| 執行階段版本: | Flash Player 10, AIR 1.5 |
If the refresh is performed asynchronously,
cancels the refresh operation and stops the building of the groups.
This method only cancels the refresh
if it is initiated by a call to the refresh() method
with an asynch argument of true, corresponding to an asynchronous refresh.
refresh | () | 方法 |
public function refresh(async:Boolean = false, dispatchCollectionEvents:Boolean = false):Boolean| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 3 |
| 執行階段版本: | Flash Player 10, AIR 1.5 |
Applies the grouping to the collection.
The collection does not detect changes to a group
automatically, so you must call the refresh()
method to update the collection after setting the grouping,
source, or summaries properties.
You also call the refresh() method when you modify
a GroupingField of the collection, such as by changing the
caseInsensitive, compareFunction,
or groupingFunction properties.
The refresh() method can be applied synchronously
or asynchronously.
When refresh() is called synchronously,
all groups and summaries are updated together before the method returns.
That means your application cannot perform other processing operations
for the duration of the call.
A client should wait for a CollectionEvent event
with the value of the kind property set
to CollectionEventKind.REFRESH
to ensure that the refresh() method completed.
In asynchronous refresh, all groups and summaries are updated individually.
The refresh() method returns before the groups and summaries
are updated so that your application can continue execution.
Also, the control is updated during the refresh so that the
user can continue to interact with it.
The overhead of updating groups and summaries individually, rather than all at once, makes an asynchronous refresh take longer than a synchronous one. However, for large data sets, your application continues to operate during the refresh.
參數
async:Boolean (default = false)true, defines the refresh to be asynchronous.
By default it is false denoting synchronous refresh.
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dispatchCollectionEvents:Boolean (default = false)true, events are
dispatched when groups are formed.
For better performance, set it to false.
If true, then events are dispatched as groups and summaries are calculated
synchronously to update the control.
Note: If async is true,
the dispatchCollectionEvents is always set to true.
By default it is false denoting no events will be dispatched.
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Boolean — true if the refresh() method completed,
and false if the refresh is incomplete,
which can mean that items are still pending.
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Tue Jun 12 2018, 03:47 PM Z