InstanceCache

Pacchetto	mx.charts.chartClasses
Classe	public class InstanceCache
Ereditarietà	InstanceCache Object

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

InstanceCache is a utility that governs the task of creating and managing a set of n object instances, where n changes frequently.

Proprietà pubbliche

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	Proprietà		Definito da
		constructor : Object Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto.	Object
		count : int The number of items currently required in the cache.	InstanceCache
		creationCallback : Function A callback invoked when new instances are created.	InstanceCache
		discard : Boolean = false Determines if unneeded instances are discarded.	InstanceCache
		factory : IFactory A factory that generates the type of object to cache.	InstanceCache
		format : flash.text:TextFormat A TextFormat to apply to any instances created.	InstanceCache
		hide : Boolean = true Determines if unneeded instances should be hidden.	InstanceCache
		insertPosition : int [sola scrittura] The position of the instance in the parent's child list.	InstanceCache
		instances : Array [sola lettura] The Array of cached instances.	InstanceCache
		properties : Object A hashmap of properties to assign to new instances.	InstanceCache
		remove : Boolean = false Determines if unneeded instances should be removed from their parent.	InstanceCache

Metodi pubblici

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	Metodo		Definito da
		InstanceCache(type:Object, parent:Object = null, insertPosition:int = -1, moduleFactory:IFlexModuleFactory = null) Constructor.	InstanceCache
		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
		propertyIsEnumerable(name:String):Boolean Indica se la proprietà specificata esiste ed è enumerabile.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche.	Object
		toLocaleString():String Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate.	Object
		toString():String Restituisce la rappresentazione in formato stringa dell'oggetto specificato.	Object
		valueOf():Object Restituisce il valore di base dell'oggetto specificato.	Object

Descrizione delle proprietà

count

proprietà

count:int

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

The number of items currently required in the cache.

Implementazione
public function get count():int
public function set count(value:int):void

creationCallback

proprietà

public var creationCallback:Function

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

A callback invoked when new instances are created. This callback has the following signature:

      function creationCallback(newInstance:Object, cache:InstanceCache):void;

discard

proprietà

public var discard:Boolean = false

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Determines if unneeded instances are discarded. If set to true, extra elements are discarded when the cache count is reduced. Otherwise, extra elements are kept in a separate cache and reused when the count is increased.

factory

proprietà

factory:IFactory

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

A factory that generates the type of object to cache. Assigning to this discards all current instances and recreate new instances of the correct type.

Implementazione
public function get factory():IFactory
public function set factory(value:IFactory):void

format

proprietà

format:flash.text:TextFormat

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

A TextFormat to apply to any instances created. If set, this format is applied as the current and default format for the contents of any instances created. This property is only relevant if the factory generates TextField instances.

Implementazione
public function get format():flash.text:TextFormat
public function set format(value:flash.text:TextFormat):void

hide

proprietà

public var hide:Boolean = true

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Determines if unneeded instances should be hidden. If true, the visible property is set to false on each extra element when the cache count is reduced, and set to true when the count is increased.

This property is only relevant when the factory generates DisplayObjects. Setting this property to true for other factory types generates a run-time error.

insertPosition

proprietà

insertPosition:int [sola scrittura]

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

The position of the instance in the parent's child list.

Implementazione
public function set insertPosition(value:int):void

instances

proprietà

instances:Array [sola lettura]

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

The Array of cached instances. There may be more instances in this Array than currently requested. You should rely on the count property of the instance cache rather than the length of this Array.

Implementazione
public function get instances():Array

properties

proprietà

properties:Object

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

A hashmap of properties to assign to new instances. Each key/value pair in this hashmap is assigned to each new instance created. The property hashmap is assigned to any existing instances when set.

The values in the hashmap are not cloned; object values are shared by all instances.

Implementazione
public function get properties():Object
public function set properties(value:Object):void

remove

proprietà

public var remove:Boolean = false

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Determines if unneeded instances should be removed from their parent. If true, the removeChild() method is called on the parent for each extra element when the cache count is reduced.

This property is only relevant when the factory generates DisplayObjects. Setting this property to true for other factory types generates a run-time error.

Descrizione della funzione di costruzione

()

Funzione di costruzione

public function InstanceCache(type:Object, parent:Object = null, insertPosition:int = -1, moduleFactory:IFlexModuleFactory = null)

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Constructor.

Parametri

	`type:Object` — The type of object to construct. This can be either a Class or an IFactory.

	`parent:Object` (default = `null`) — An optional DisplayObject to add new instances to.

	`insertPosition:int` (default = `-1`) — Where in the parent's child list to insert instances. Set to -1 to add the children to the end of the child list.

	`moduleFactory:IFlexModuleFactory` (default = `null`) — The context for using embedded fonts and for finding the style manager that controls the styles for this component.

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InstanceCache - AS3 Flex

Classi x

count

creationCallback

discard

factory

format

hide

insertPosition

instances

properties

remove

InstanceCache