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spark.collections 

NumericDataProvider  - AS3 Flex

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Instruções, palavras-chave e diretivas
Tipos especiais

Apêndices

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Conjuntos de caracteres suportados
Tags MXML apenas
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Marcas de texto cronometradas
Lista de elementos deprecados
Constantes de Implementação de Acessibilidade
Como Usar Exemplos do ActionScript
Aspectos jurídicos
Pacotespark.collections
Classepublic class NumericDataProvider
HerançaNumericDataProvider Inheritance OnDemandEventDispatcher Inheritance Object
Implementações IList

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: 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.

Elementos da API relacionados



Propriedades públicas
 PropriedadeDefinido por
 Inheritedconstructor : Object
Uma referência ao objeto de classe ou à função de construtor de uma determinada ocorrência de objeto.
Object
  length : int
[somente leitura] 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
Métodos públicos
 MétodoDefinido por
  
Constructor.
NumericDataProvider
 Inherited
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
  
addItemAt(item:Object, index:int):void
This function is not supported.
NumericDataProvider
 Inherited
Dispatches an event into the event flow.
OnDemandEventDispatcher
  
getItemAt(index:int, prefetch:int = 0):Object
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
 Inherited
Checks whether the EventDispatcher object has any listeners registered for a specific type of event.
OnDemandEventDispatcher
 Inherited
Indica se um objeto tem uma propriedade especificada definida.
Object
 Inherited
Indica se uma ocorrência da classe Object está na cadeia de protótipos do objeto especificado como o parâmetro.
Object
  
itemUpdated(item:Object, property:Object = null, oldValue:Object = null, newValue:Object = null):void
This function is not supported.
NumericDataProvider
 Inherited
Indica se a propriedade especificada existe e é enumerável.
Object
  
This function is not supported.
NumericDataProvider
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object.
OnDemandEventDispatcher
  
This function is not supported.
NumericDataProvider
  
setItemAt(item:Object, index:int):Object
This function is not supported.
NumericDataProvider
 Inherited
Define a disponibilidade de uma propriedade dinâmica para operações de repetição.
Object
  
Returns an Array that is populated in the same order as the IList implementation.
NumericDataProvider
 Inherited
Retorna a representação da string deste objeto, formatado segundo as convenções específicas para a localidade.
Object
 Inherited
Retorna a representação de string do objeto especificado.
Object
 Inherited
Retorna o valor primitivo do objeto especificado.
Object
 Inherited
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.
OnDemandEventDispatcher
Detalhes da propriedade

length

propriedade
length:int  [somente leitura]

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: Flash Player 11, AIR 3

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



Implementação
    public function get length():int

maximum

propriedade 
maximum:Number

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: Flash Player 11, AIR 3

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

O valor padrão é 100.



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

minimum

propriedade 
minimum:Number

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: Flash Player 11, AIR 3

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

O valor padrão é 0.



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

stepSize

propriedade 
stepSize:Number

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: 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.

O valor padrão é 1.



Implementação
    public function get stepSize():Number
    public function set stepSize(value:Number):void
Detalhes do construtor

NumericDataProvider

()Construtor
public function NumericDataProvider()

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: Flash Player 11, AIR 3

Constructor.

Detalhes do método

addItem

()método
public function addItem(item:Object):void

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: Flash Player 11, AIR 3

This function is not supported.

Parâmetros

item:Object

addItemAt

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

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: Flash Player 11, AIR 3

This function is not supported.

Parâmetros

item:Object
 
index:int

getItemAt

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

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: Flash Player 11, AIR 3

Gets the item at the specified index.

Parâmetros

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.

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

getItemIndex

()método 
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.

Parâmetros

item:Object — The item to find.

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

itemUpdated

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

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: Flash Player 11, AIR 3

This function is not supported.

Parâmetros

item:Object
 
property:Object (default = null)
 
oldValue:Object (default = null)
 
newValue:Object (default = null)

removeAll

()método 
public function removeAll():void

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: Flash Player 11, AIR 3

This function is not supported.

removeItemAt

()método 
public function removeItemAt(index:int):Object

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: Flash Player 11, AIR 3

This function is not supported.

Parâmetros

index:int

Retorna
Object

setItemAt

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

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: Flash Player 11, AIR 3

This function is not supported.

Parâmetros

item:Object
 
index:int

Retorna
Object

toArray

()método 
public function toArray():Array

Versão da linguagem: ActionScript 3.0
Versão de produto: Flex 4.6
Versões de runtime: 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.

Retorna
Array — The array.




[ X ]Por que inglês?
O conteúdo na Referência do ActionScript 3.0 aparece em inglês

Nem todas as partes da Referência do ActionScript 3.0 estão traduzidas em todos os idiomas. Quando um elemento de um idioma não está traduzido, ele é exibido em inglês. Por exemplo, a classe ga.controls.HelpBox não está traduzida em nenhum idioma. Por isso, na versão da referência em português do Brasil, a classe ga.controls.HelpBox é exibida em inglês.