| 套件 | spark.collections |
| 類別 | public class NumericDataProvider |
| 繼承 | NumericDataProvider  OnDemandEventDispatcher Object |
| 實作 | IList |
| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 4.6 |
| 執行階段版本: | Flash Player 11, AIR 3 |
minimum and maximum
properties. The stepSize property defines the difference between
an item and the next item.
This class is used primarily as a data provider for the SpinnerList control; for example:
<s:SpinnerList>
<s:dataProvider>
<s:NumericDataProvider minimum="0" maximum="23" stepSize="1"/>
</s:dataProvider>
</s:SpinnerList>
The advantage of this class is that the item values are calculated on demand, instead of stored.
Because the values are calculated instead of stored, the addItem(), addItemAt(),
removeAll(), removeItemAt(), itemUpdated() and setItemAt() IList methods are not
supported.
相關 API 元素
隱藏繼承公用屬性
顯示繼承公用屬性| 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 | |
| length : int [唯讀]
The number of items in this collection. | NumericDataProvider | ||
| maximum : Number
The value of the last item. | NumericDataProvider | ||
| minimum : Number
The value of the first item. | NumericDataProvider | ||
| stepSize : Number
The stepSize property controls the values of items between the first and last items. | NumericDataProvider | ||
| 方法 | 定義自 | ||
|---|---|---|---|
Constructor. | NumericDataProvider | ||
| addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener
receives notification of an event. | OnDemandEventDispatcher | |
This function is not supported. | NumericDataProvider | ||
This function is not supported. | NumericDataProvider | ||
|
Dispatches an event into the event flow. | OnDemandEventDispatcher | |
Gets the item at the specified index. | NumericDataProvider | ||
Returns the index of the item if it is in the list such that
getItemAt(index) == item. | NumericDataProvider | ||
|
Checks whether the EventDispatcher object has any listeners registered for a specific type
of event. | OnDemandEventDispatcher | |
|
指出物件是否有已定義的指定屬性。 | Object | |
|
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 | |
itemUpdated(item:Object, property:Object = null, oldValue:Object = null, newValue:Object = null):void
This function is not supported. | NumericDataProvider | ||
|
指出指定的屬性是否存在，以及是否可列舉。 | Object | |
This function is not supported. | NumericDataProvider | ||
|
Removes a listener from the EventDispatcher object. | OnDemandEventDispatcher | |
This function is not supported. | NumericDataProvider | ||
This function is not supported. | NumericDataProvider | ||
|
為迴圈作業設定動態屬性的可用性。 | Object | |
Returns an Array that is populated in the same order as the IList
implementation. | NumericDataProvider | ||
|
傳回代表此物件的字串，根據地區特定慣例進行格式化。 | Object | |
|
會傳回指定之物件的字串形式。 | Object | |
|
會傳回指定之物件的基本值。 | Object | |
|
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type. | OnDemandEventDispatcher | |
length | 屬性 |
maximum | 屬性 |
minimum | 屬性 |
stepSize | 屬性 |
stepSize:Number| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 4.6 |
| 執行階段版本: | Flash Player 11, AIR 3 |
The stepSize property controls the values of items between the first and last items.
For each item, the value is calculated as the sum of the minimum
and the item's index multiplied by this property.
For example, if minimum is 10, maximum is 20, and this property is 3, then the
item values of this data provider are 10, 13, 16, 19, and 20.
預設值為 1。
實作
public function get stepSize():Number public function set stepSize(value:Number):voidNumericDataProvider | () | 建構函式 |
public function NumericDataProvider()| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 4.6 |
| 執行階段版本: | Flash Player 11, AIR 3 |
Constructor.
addItem | () | 方法 |
addItemAt | () | 方法 |
getItemAt | () | 方法 |
public function getItemAt(index:int, prefetch:int = 0):Object| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 4.6 |
| 執行階段版本: | Flash Player 11, AIR 3 |
Gets the item at the specified index.
參數
index:int — The index in the list from which to retrieve the item.
| |
prefetch:int (default = 0)int indicating both the direction
and number of items to fetch during the request if the item is
not local.
|
Object — The item at that index, or null if there is none.
|
getItemIndex | () | 方法 |
public function getItemIndex(item:Object):intReturns the index of the item if it is in the list such that getItemAt(index) == item.
Note: unlike IViewCursor.findxxx() methods,
The getItemIndex() method cannot take a parameter with
only a subset of the fields in the item being serched for;
this method always searches for an item that exactly matches
the input parameter.
參數
item:Object — The item to find.
|
int — The index of the item, or -1 if the item is not in the list.
|
itemUpdated | () | 方法 |
public function itemUpdated(item:Object, property:Object = null, oldValue:Object = null, newValue:Object = null):void| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 4.6 |
| 執行階段版本: | Flash Player 11, AIR 3 |
This function is not supported.
參數
item:Object | |
property:Object (default = null) | |
oldValue:Object (default = null) | |
newValue:Object (default = null) |
removeAll | () | 方法 |
public function removeAll():void| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 4.6 |
| 執行階段版本: | Flash Player 11, AIR 3 |
This function is not supported.
removeItemAt | () | 方法 |
setItemAt | () | 方法 |
toArray | () | 方法 |
Tue Jun 12 2018, 03:47 PM Z