| 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 |
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
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 | ||
| Metodo | Definito da | ||
|---|---|---|---|
Construct a new ArrayList using the specified array as its source. | ArrayList | ||
Adds a list of items to the current list, placing them at the end of
the list in the order they are passed. | ArrayList | ||
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 | |
Add the specified item to the end of the list. | ArrayList | ||
Add the item at the specified index. | ArrayList | ||
|
Invia un evento nel flusso di eventi. | EventDispatcher | |
Get the item at the specified index. | ArrayList | ||
Return the index of the item if it is in the list such that
getItemAt(index) == item. | ArrayList | ||
|
Verifica se per l'oggetto EventDispatcher sono presenti listener registrati per un tipo specifico di evento. | EventDispatcher | |
|
Indica se per un oggetto è definita una proprietà specifica. | Object | |
|
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 | ||
|
Indica se la proprietà specificata esiste ed è enumerabile. | Object | |
Remove all items from the list. | ArrayList | ||
|
Rimuove un listener dall'oggetto EventDispatcher. | EventDispatcher | |
Removes the specified item from this list, should it exist. | ArrayList | ||
Remove the item at the specified index and return it. | ArrayList | ||
Place the item at the specified index. | ArrayList | ||
|
Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche. | Object | |
Return an Array that is populated in the same order as the IList
implementation. | ArrayList | ||
|
Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate. | Object | |
[override]
Pretty prints the contents of this ArrayList to a string and returns it. | ArrayList | ||
|
Restituisce il valore di base dell'oggetto specificato. | Object | |
|
Verifica se un listener di eventi è registrato con questo oggetto EventDispatcher o qualsiasi suo antenato per il tipo di evento specificato. | EventDispatcher | |
| Metodo | Definito da | ||
|---|---|---|---|
Called when any of the contained items in the list dispatch an
ObjectChange event. | ArrayList | ||
If the item is an IEventDispatcher, watch it for updates. | ArrayList | ||
If the item is an IEventDispatcher, stop watching it for updates. | ArrayList | ||
| Evento | Riepilogo | Definito da | ||
|---|---|---|---|---|
| [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 | ||
| Dispatched when the IList has been updated in some way. | ArrayList | |||
| [evento di trasmissione] Inviato quando Flash Player o l'applicazione AIR perde l'attivazione del sistema operativo e sta entrando nello stato inattivo. | EventDispatcher | ||
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():intsource | 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):voiduid | proprietà |
ArrayList | () | 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.
Parametrisource:Array (default = null) |
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 |
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) |
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
|
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) | |
oldValue:Object (default = null) | |
newValue:Object (default = null) |
Elementi API correlati
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.
|
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.
|
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
|
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.
RestituisceArray — 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 |
collectionChange | Evento |
mx.events.CollectionEventproprietà 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 thetype 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 |
Tue Jun 12 2018, 02:44 PM Z