NumericDataProvider

Pakket	spark.collections
Klasse	public class NumericDataProvider
Overerving	NumericDataProvider OnDemandEventDispatcher Object
Implementatie	IList

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

This IList class generates items that are a sequential series of numbers. The numbers range between the 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.

Verwante API-elementen

spark.components.SpinnerList
mx.collections.IList

Openbare eigenschappen

Overerfde openbare eigenschappen verbergen

Overerfde openbare eigenschappen weergeven

	Eigenschap		Gedefinieerd door
		constructor : Object Verwijzing naar het klasseobject of de constructorfunctie van een bepaalde objectinstantie.	Object
		length : int [alleen-lezen] 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

Openbare methoden

Overerfde openbare methoden verbergen

Overerfde openbare methoden weergeven

	Methode		Gedefinieerd door
		NumericDataProvider() 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
		addItem(item:Object):void This function is not supported.	NumericDataProvider
		addItemAt(item:Object, index:int):void This function is not supported.	NumericDataProvider
		dispatchEvent(event:Event):Boolean Dispatches an event into the event flow.	OnDemandEventDispatcher
		getItemAt(index:int, prefetch:int = 0):Object Gets the item at the specified index.	NumericDataProvider
		getItemIndex(item:Object):int Returns the index of the item if it is in the list such that getItemAt(index) == item.	NumericDataProvider
		hasEventListener(type:String):Boolean Checks whether the EventDispatcher object has any listeners registered for a specific type of event.	OnDemandEventDispatcher
		hasOwnProperty(name:String):Boolean Geeft aan of voor een object een opgegeven eigenschap is gedefinieerd.	Object
		isPrototypeOf(theClass:Object):Boolean Geeft aan of een instantie van de klasse Object zich in de prototypeketen van het object bevindt dat als parameter is opgegeven.	Object
		itemUpdated(item:Object, property:Object = null, oldValue:Object = null, newValue:Object = null):void This function is not supported.	NumericDataProvider
		propertyIsEnumerable(name:String):Boolean Geeft aan of de opgegeven eigenschap bestaat en kan worden opgesomd.	Object
		removeAll():void This function is not supported.	NumericDataProvider
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Removes a listener from the EventDispatcher object.	OnDemandEventDispatcher
		removeItemAt(index:int):Object This function is not supported.	NumericDataProvider
		setItemAt(item:Object, index:int):Object This function is not supported.	NumericDataProvider
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Stelt de beschikbaarheid van een dynamische eigenschap voor lusbewerkingen in.	Object
		toArray():Array Returns an Array that is populated in the same order as the IList implementation.	NumericDataProvider
		toLocaleString():String Geeft de tekenreeksweergave van dit object weer, geformatteerd volgens de locatiespecifieke conventies.	Object
		toString():String Retourneert een tekenreeksrepresentatie van het opgegeven object.	Object
		valueOf():Object Retourneert de primitieve waarde van het opgegeven object.	Object
		willTrigger(type:String):Boolean Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.	OnDemandEventDispatcher

Eigenschapdetails

length

eigenschap

length:int [alleen-lezen]

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

The number of items in this collection. 0 means no items while -1 means the length is unknown.

Implementatie
public function get length():int

maximum

eigenschap

maximum:Number

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

The value of the last item. This value must be larger than the minimum value.

De standaardwaarde is 100.

Implementatie
public function get maximum():Number
public function set maximum(value:Number):void

minimum

eigenschap

minimum:Number

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

The value of the first item. This value must be smaller than the minimum value.

De standaardwaarde is 0.

Implementatie
public function get minimum():Number
public function set minimum(value:Number):void

stepSize

eigenschap

stepSize:Number

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

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.

De standaardwaarde is 1.

Implementatie
public function get stepSize():Number
public function set stepSize(value:Number):void

Constructordetails

()

Constructor

public function NumericDataProvider()

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

Constructor.

Methodedetails

addItem

()

methode

public function addItem(item:Object):void

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

This function is not supported.

Parameters

item:Object

addItemAt

()

methode

public function addItemAt(item:Object, index:int):void

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

This function is not supported.

Parameters

	`item:Object`

	`index:int`

getItemAt

()

methode

public function getItemAt(index:int, prefetch:int = 0):Object

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

Gets the item at the specified index.

Parameters

	`index:int` — The index in the list from which to retrieve the item.

	`prefetch:int` (default = `0`) — An `int` indicating both the direction and number of items to fetch during the request if the item is not local.

Geretourneerde waarde

Object — The item at that index, or null if there is none.

getItemIndex

()

methode

public function getItemIndex(item:Object):int

Returns 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.

Parameters

item:Object — The item to find.

Geretourneerde waarde

int — The index of the item, or -1 if the item is not in the list.

itemUpdated

()

methode

public function itemUpdated(item:Object, property:Object = null, oldValue:Object = null, newValue:Object = null):void

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

This function is not supported.

Parameters

	`item:Object`

	`property:Object` (default = `null`)

	`oldValue:Object` (default = `null`)

	`newValue:Object` (default = `null`)

removeAll

()

methode

public function removeAll():void

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

This function is not supported.

removeItemAt

()

methode

public function removeItemAt(index:int):Object

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

This function is not supported.

Parameters

index:int

Geretourneerde waarde

Object

setItemAt

()

methode

public function setItemAt(item:Object, index:int):Object

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

This function is not supported.

Parameters

	`item:Object`

	`index:int`

Geretourneerde waarde

Object

toArray

()

methode

public function toArray():Array

Taalversie:

ActionScript 3.0

Productversie:

Flex 4.6

Runtimeversies:

Flash Player 11, AIR 3

Returns an Array that is populated in the same order as the IList implementation. This method can throw an ItemPendingError.

Geretourneerde waarde

Array — The array.

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NumericDataProvider - AS3 Flex

Klassen x

length

maximum

minimum

stepSize