ArrayList

Pacchetto	mx.collections
Classe	public class ArrayList
Ereditarietà	ArrayList EventDispatcher Object
Implementa	IList, IExternalizable, IPropertyChangeNotifier
Sottoclassi	Conflicts

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 4

Versioni runtime:

Flash Player 10, AIR 1.5

The ArrayList class is a simple implementation of IList that uses a backing Array as the source of the data. Items in the backing Array can be accessed and manipulated using the methods and properties of the IList interface. Operations on an ArrayList instance modify the data source; for example, if you use the removeItemAt() method on an ArrayList, you remove the item from the underlying Array. This base class will not throw ItemPendingErrors but it is possible that a subclass might.

  <mx:ArrayList
  Properties
  source="null"
  />

Proprietà MXML predefinitasource

Proprietà pubbliche

Nascondi proprietà pubbliche ereditate

Mostra proprietà pubbliche ereditate

	Proprietà		Definito da
		constructor : Object Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto.	Object
		length : int [sola lettura] Get the number of items in the list.	ArrayList
		source : Array The source array for this ArrayList.	ArrayList
		uid : String Provides access to the unique id for this list.	ArrayList

Metodi pubblici

Nascondi metodi pubblici ereditati

Mostra metodi pubblici ereditati

	Metodo		Definito da
		ArrayList(source:Array = null) Construct a new ArrayList using the specified array as its source.	ArrayList
		addAll(addList:IList):void Adds a list of items to the current list, placing them at the end of the list in the order they are passed.	ArrayList
		addAllAt(addList:IList, index:int):void Adds a list of items to the current list, placing them at the position index passed in to the function.	ArrayList
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void Registra un oggetto listener di eventi con un oggetto EventDispatcher, in modo che il listener riceva la notifica di un evento.	EventDispatcher
		addItem(item:Object):void Add the specified item to the end of the list.	ArrayList
		addItemAt(item:Object, index:int):void Add the item at the specified index.	ArrayList
		dispatchEvent(event:Event):Boolean Invia un evento nel flusso di eventi.	EventDispatcher
		getItemAt(index:int, prefetch:int = 0):Object Get the item at the specified index.	ArrayList
		getItemIndex(item:Object):int Return the index of the item if it is in the list such that getItemAt(index) == item.	ArrayList
		hasEventListener(type:String):Boolean Verifica se per l'oggetto EventDispatcher sono presenti listener registrati per un tipo specifico di evento.	EventDispatcher
		hasOwnProperty(name:String):Boolean Indica se per un oggetto è definita una proprietà specifica.	Object
		isPrototypeOf(theClass:Object):Boolean Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro.	Object
		itemUpdated(item:Object, property:Object = null, oldValue:Object = null, newValue:Object = null):void Notify the view that an item has been updated.	ArrayList
		propertyIsEnumerable(name:String):Boolean Indica se la proprietà specificata esiste ed è enumerabile.	Object
		removeAll():void Remove all items from the list.	ArrayList
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Rimuove un listener dall'oggetto EventDispatcher.	EventDispatcher
		removeItem(item:Object):Boolean Removes the specified item from this list, should it exist.	ArrayList
		removeItemAt(index:int):Object Remove the item at the specified index and return it.	ArrayList
		setItemAt(item:Object, index:int):Object Place the item at the specified index.	ArrayList
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche.	Object
		toArray():Array Return an Array that is populated in the same order as the IList implementation.	ArrayList
		toLocaleString():String Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate.	Object
		toString():String [override] Pretty prints the contents of this ArrayList to a string and returns it.	ArrayList
		valueOf():Object Restituisce il valore di base dell'oggetto specificato.	Object
		willTrigger(type:String):Boolean Verifica se un listener di eventi è registrato con questo oggetto EventDispatcher o qualsiasi suo antenato per il tipo di evento specificato.	EventDispatcher

Metodi protetti

	Metodo		Definito da
		itemUpdateHandler(event:PropertyChangeEvent):void Called when any of the contained items in the list dispatch an ObjectChange event.	ArrayList
		startTrackUpdates(item:Object):void If the item is an IEventDispatcher, watch it for updates.	ArrayList
		stopTrackUpdates(item:Object):void If the item is an IEventDispatcher, stop watching it for updates.	ArrayList

Eventi

Fate clic per visualizzare altre informazioni sugli eventi

Nascondi eventi ereditati

Mostra eventi ereditati

	Riepilogo	Definito da
activate	[evento di trasmissione] Inviato quando Flash Player o l'applicazione AIR ottiene lo stato di attivazione del sistema operativo ed entra nello stato attivo.	EventDispatcher
collectionChange	Dispatched when the IList has been updated in some way.	ArrayList
deactivate	[evento di trasmissione] Inviato quando Flash Player o l'applicazione AIR perde l'attivazione del sistema operativo e sta entrando nello stato inattivo.	EventDispatcher

Descrizione delle proprietà

length

proprietà

length:int [sola lettura]

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Get the number of items in the list. An ArrayList should always know its length so it shouldn't return -1, though a subclass may override that behavior.

Questa proprietà può essere utilizzata come origine per l’associazione di dati. Quando questa proprietà viene modificata, invia l’evento collectionChange .

Implementazione
public function get length():int

source

proprietà

source:Array

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

The source array for this ArrayList. Any changes done through the IList interface will be reflected in the source array. If no source array was supplied the ArrayList will create one internally. Changes made directly to the underlying Array (e.g., calling theList.source.pop() will not cause CollectionEvents to be dispatched.

Implementazione
public function get source():Array
public function set source(value:Array):void

uid

proprietà

uid:String

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Provides access to the unique id for this list.

Implementazione
public function get uid():String
public function set uid(value:String):void

Descrizione della funzione di costruzione

()

Funzione di costruzione

public function ArrayList(source:Array = null)

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Construct a new ArrayList using the specified array as its source. If no source is specified an empty array will be used.

Parametri

source:Array (default = null) — The Array to use as a source for the ArrayList.

Descrizione dei metodi

addAll

()

metodo

public function addAll(addList:IList):void

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Adds a list of items to the current list, placing them at the end of the list in the order they are passed.

Parametri

addList:IList — The list of items to add to the current list

addAllAt

()

metodo

public function addAllAt(addList:IList, index:int):void

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Adds a list of items to the current list, placing them at the position index passed in to the function. The items are placed at the index location and placed in the order they are recieved.

Parametri

	`addList:IList` — The list of items to add to the current list

	`index:int` — The location of the current list to place the new items.

addItem

()

metodo

public function addItem(item:Object):void

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Add the specified item to the end of the list. Equivalent to addItemAt(item, length);

Parametri

item:Object — the item to add

addItemAt

()

metodo

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

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Add the item at the specified index. Any item that was after this index is moved out by one.

Parametri

	`item:Object` — the item to place at the index

	`index:int` — the index at which to place the item

Genera

RangeError — if index is less than 0 or greater than the length

getItemAt

()

metodo

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

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Get the item at the specified index.

Parametri

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

	`prefetch:int` (default = `0`) — int indicating both the direction and amount of items to fetch during the request should the item not be local.

Restituisce

Object — the item at that index, null if there is none

Genera

	`Error` — if the data for that index needs to be loaded from a remote location

	`RangeError` — if the index < 0 or index >= length

getItemIndex

()

metodo

public function getItemIndex(item:Object):int

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Return the index of the item if it is in the list such that getItemAt(index) == item. Note that in this implementation the search is linear and is therefore O(n).

Parametri

item:Object — the item to find

Restituisce

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

itemUpdated

()

metodo

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

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Notify the view that an item has been updated. This is useful if the contents of the view do not implement IEventDispatcher. If a property is specified the view may be able to optimize its notification mechanism. Otherwise it may choose to simply refresh the whole view.

Parametri

	`item:Object` — The item within the view that was updated.

	`property:Object` (default = `null`) — A String, QName, or int specifying the property that was updated.

	`oldValue:Object` (default = `null`) — The old value of that property. (If property was null, this can be the old value of the item.)

	`newValue:Object` (default = `null`) — The new value of that property. (If property was null, there's no need to specify this as the item is assumed to be the new value.)

Elementi API correlati

mx.events.CollectionEvent
mx.core.IPropertyChangeNotifier
mx.events.PropertyChangeEvent

itemUpdateHandler

()

metodo

protected function itemUpdateHandler(event:PropertyChangeEvent):void

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Called when any of the contained items in the list dispatch an ObjectChange event. Wraps it in a CollectionEventKind.UPDATE object.

Parametri

event:PropertyChangeEvent — The event object for the ObjectChange event.

removeAll

()

metodo

public function removeAll():void

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Remove all items from the list.

removeItem

()

metodo

public function removeItem(item:Object):Boolean

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Removes the specified item from this list, should it exist.

Parametri

item:Object — Object reference to the item that should be removed.

Restituisce

Boolean — Boolean indicating if the item was removed.

removeItemAt

()

metodo

public function removeItemAt(index:int):Object

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Remove the item at the specified index and return it. Any items that were after this index are now one index earlier.

Parametri

index:int — The index from which to remove the item.

Restituisce

Object — The item that was removed.

Genera

RangeError — if index < 0 or index >= length.

setItemAt

()

metodo

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

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Place the item at the specified index. If an item was already at that index the new item will replace it and it will be returned.

Parametri

	`item:Object` — the new value for the index

	`index:int` — the index at which to place the item

Restituisce

Object — the item that was replaced, null if none

Genera

RangeError — if index is less than 0 or greater than or equal to length

startTrackUpdates

()

metodo

protected function startTrackUpdates(item:Object):void

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

If the item is an IEventDispatcher, watch it for updates. This method is called by the addItemAt() method, and when the source is initially assigned.

Parametri

item:Object — The item passed to the addItemAt() method.

stopTrackUpdates

()

metodo

protected function stopTrackUpdates(item:Object):void

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

If the item is an IEventDispatcher, stop watching it for updates. This method is called by the removeItemAt() and removeAll() methods, and before a new source is assigned.

Parametri

item:Object — The item passed to the removeItemAt() method.

toArray

()

metodo

public function toArray():Array

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Return an Array that is populated in the same order as the IList implementation.

Restituisce

Array — An Array populated in the same order as the IList implementation.

Genera

Error — if the data is not yet completely loaded from a remote location

toString

()

metodo

override public function toString():String

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Pretty prints the contents of this ArrayList to a string and returns it.

Restituisce

String — A String containing the contents of the ArrayList.

Descrizione degli eventi

collectionChange

Evento

Tipo di oggetto evento: mx.events.CollectionEvent
proprietà CollectionEvent.type = mx.events.CollectionEvent.COLLECTION_CHANGE

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Dispatched when the IList has been updated in some way.

The CollectionEvent.COLLECTION_CHANGE constant defines the value of the type property of the event object for an event that is dispatched when a collection has changed.

The properties of the event object have the following values. Not all properties are meaningful for all kinds of events. See the detailed property descriptions for more information.

Property	Value
`bubbles`	false
`cancelable`	false
`currentTarget`	The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`items`	An Array of objects with information about the items affected by the event. The contents of this field depend on the event kind; for details see the `items` property
`kind`	The kind of event. The valid values are defined in the CollectionEventKind class as constants.
`location`	Location within the target collection of the item(s) specified in the `items` property.
`oldLocation`	the previous location in the collection of the item specified in the `items` property.
`target`	The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.
`type`	CollectionEvent.COLLECTION_CHANGE

Note legali | Informativa sulla privacy online

ArrayList - AS3 Flex

Classi x

length

source

uid

ArrayList

addAll

addAllAt

addItem

addItemAt

getItemAt

getItemIndex

itemUpdated

itemUpdateHandler

removeAll

removeItem

removeItemAt

setItemAt

startTrackUpdates

stopTrackUpdates

toArray

toString

collectionChange