NumericDataProvider

(Preview)

Package	spark.collections
Class	public class NumericDataProvider
Inheritance	NumericDataProvider OnDemandEventDispatcher Object
Implements	IList

Language Version:

ActionScript 3.0

Product Version:

Flex 4.6

Runtime Versions:

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.

Related API Elements

spark.components.SpinnerList
mx.collections.IList

Public Properties

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	Property		Defined By
		constructor : Object A reference to the class object or constructor function for a given object instance.	Object
		length : int [read-only] 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

Public Methods

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	Method		Defined By
		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 Indicates whether an object has a specified property defined.	Object
		isPrototypeOf(theClass:Object):Boolean Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.	Object
		itemUpdated(item:Object, property:Object = null, oldValue:Object = null, newValue:Object = null):void This function is not supported.	NumericDataProvider
		propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable.	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 Sets the availability of a dynamic property for loop operations.	Object
		toArray():Array Returns an Array that is populated in the same order as the IList implementation.	NumericDataProvider
		toLocaleString():String Returns the string representation of this object, formatted according to locale-specific conventions.	Object
		toString():String Returns the string representation of the specified object.	Object
		valueOf():Object Returns the primitive value of the specified 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

Property Detail

Constructor Detail

Method Detail

getItemIndex

()

method

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.

Returns

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

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	`item:Object`

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

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

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

NumericDataProvider - AS3 Flex

Packagesx

Language Elements

Appendixes

Package spark.collections

length

maximum

minimum

stepSize

addItem

addItemAt

getItemAt

getItemIndex

itemUpdated

removeAll

removeItemAt

setItemAt

toArray

	`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.