BindingUtils - Bron voor Adobe ActionScript® 3 (AS3 Flex) API

Pakket	mx.binding.utils
Klasse	public class BindingUtils
Overerving	BindingUtils Object

Taalversie:

ActionScript 3.0

Productversie:

Flex 3

Runtimeversies:

Flash Player 9, AIR 1.1

The BindingUtils class defines utility methods for performing data binding from ActionScript. You can use the methods defined in this class to configure data bindings.

Meer voorbeelden

About data binding
Defining data bindings in ActionScript

Openbare eigenschappen

Overerfde openbare eigenschappen verbergen

Overerfde openbare eigenschappen weergeven

	Eigenschap		Gedefinieerd door
		constructor : Object Verwijzing naar het klasseobject of de constructorfunctie van een bepaalde objectinstantie.	Object

Openbare methoden

Overerfde openbare methoden verbergen

Overerfde openbare methoden weergeven

	Methode		Gedefinieerd door
		bindProperty(site:Object, prop:String, host:Object, chain:Object, commitOnly:Boolean = false, useWeakReference:Boolean = false):ChangeWatcher [statisch] Binds a public property, prop on the site Object, to a bindable property or property chain.	BindingUtils
		bindSetter(setter:Function, host:Object, chain:Object, commitOnly:Boolean = false, useWeakReference:Boolean = false):ChangeWatcher [statisch] Binds a setter function, setter, to a bindable property or property chain.	BindingUtils
		hasOwnProperty(name:String):Boolean Geeft aan of voor een object een opgegeven eigenschap is gedefinieerd.	Object
		isPrototypeOf(theClass:Object):Boolean Geeft aan of een instantie van de klasse Object zich in de prototypeketen van het object bevindt dat als parameter is opgegeven.	Object
		propertyIsEnumerable(name:String):Boolean Geeft aan of de opgegeven eigenschap bestaat en kan worden opgesomd.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Stelt de beschikbaarheid van een dynamische eigenschap voor lusbewerkingen in.	Object
		toLocaleString():String Geeft de tekenreeksweergave van dit object weer, geformatteerd volgens de locatiespecifieke conventies.	Object
		toString():String Retourneert een tekenreeksrepresentatie van het opgegeven object.	Object
		valueOf():Object Retourneert de primitieve waarde van het opgegeven object.	Object

Methodedetails

bindProperty

()

methode

 public static function bindProperty(site:Object, prop:String, host:Object, chain:Object, commitOnly:Boolean = false, useWeakReference:Boolean = false):ChangeWatcher

Taalversie:

ActionScript 3.0

Productversie:

Flex 3

Runtimeversies:

Flash Player 9, AIR 1.1

Binds a public property, prop on the site Object, to a bindable property or property chain. If a ChangeWatcher instance is successfully created, prop is initialized to the current value of chain.

Parameters

	`site:Object` — The Object defining the property to be bound to `chain`.

	`prop:String` — The name of the public property defined in the `site` Object to be bound. The property will receive the current value of `chain`, when the value of `chain` changes.

	`host:Object` — The object that hosts the property or property chain to be watched. The `host` maintains a list of `sites` to update when `prop` changes.

	`chain:Object` — A value specifying the property or chain to be watched. Legal values are: String containing the name of a public bindable property of the host object. An Object in the form: `{ name: property name, getter: function(host) { return host[property name] } }`. This Object must contain the name of, and a getter function for, a public bindable property of the host object. A non-empty Array containing a combination of the first two options that represents a chain of bindable properties accessible from the host. For example, to bind the property `host.a.b.c`, call the method as: `bindProperty(site, prop, host, ["a","b","c"])`. Note: The property or properties named in the `chain` argument must be public, because the `describeType()` method suppresses all information about non-public properties, including the bindability metadata that ChangeWatcher scans to find the change events that are exposed for a given property. However, the getter function supplied when using the `{ name, getter }` argument form described above can be used to associate an arbitrary computed value with the named (public) property.

	`commitOnly:Boolean` (default = `false`) — Set to `true` if the handler should be called only on committing change events; set to `false` if the handler should be called on both committing and non-committing change events. Note: the presence of non-committing change events for a property is indicated by the `[NonCommittingChangeEvent(<event-name>)]` metadata tag. Typically these tags are used to indicate fine-grained value changes, such as modifications in a text field prior to confirmation.

	`useWeakReference:Boolean` (default = `false`) — Determines whether the reference to `site` is strong or weak. A strong reference (the default) prevents `site` from being garbage-collected. A weak reference does not. Added for Flex 4.

Geretourneerde waarde

ChangeWatcher — A ChangeWatcher instance, if at least one property name has been specified to the chain argument; null otherwise.

bindSetter

()

methode

 public static function bindSetter(setter:Function, host:Object, chain:Object, commitOnly:Boolean = false, useWeakReference:Boolean = false):ChangeWatcher

Taalversie:

ActionScript 3.0

Productversie:

Flex 3

Runtimeversies:

Flash Player 9, AIR 1.1

Binds a setter function, setter, to a bindable property or property chain. If a ChangeWatcher instance is successfully created, the setter function is invoked. The setter must have the following function signature:

      function mySetterFunction(object:Object):void {
          //Do whatever you want with the value of the bound property.
      }

where object contains the current value of chain.

Parameters

	`setter:Function` — Setter method to invoke with an argument of the current value of `chain` when that value changes.

	`host:Object` — The host of the property. See the `bindProperty()` method for more information. The `host` maintains a list of `setters` to update when `prop` changes.

	`chain:Object` — The name of the property, or property chain. See the `bindProperty()` method for more information.

	`commitOnly:Boolean` (default = `false`) — Set to `true` if the handler should be called only on committing change events. See the `bindProperty()` method for more information.

	`useWeakReference:Boolean` (default = `false`) — Determines whether the reference to `setter` is strong or weak. A strong reference (the default) prevents `setter` from being garbage-collected. A weak reference does not. Added for Flex 4.

Geretourneerde waarde

ChangeWatcher — A ChangeWatcher instance, if at least one property name has been specified to the chain argument; null otherwise.

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BindingUtils - AS3 Flex

Klassen x

bindProperty

bindSetter