Referencia de ActionScript® 3.0 para la plataforma de Adobe® Flash®
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RadioButtonGroup  - AS3 Flex

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Elementos del lenguaje

Constantes globales
Funciones globales
Operadores
Sentencias, palabras clave y directivas
Tipos especiales

Apéndices

Novedades
Errores del compilador
Advertencias del compilador
Errores en tiempo de ejecución
Migración a ActionScript 3
Conjuntos de caracteres admitidos
Solo etiquetas MXML
Elementos Motion XML
Etiquetas de texto temporizado
Lista de elementos desfasados
Constantes de implementación de accesibilidad
Cómo utilizar ejemplos de ActionScript
Avisos legales
Paquetemx.controls
Clasepublic class RadioButtonGroup
HerenciaRadioButtonGroup Inheritance EventDispatcher Inheritance Object
Implementa IMXMLObject

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 3
Versiones de motor de ejecución: Flash Player 9, AIR 1.1


Desde Flex 4.0, Adobe recomienda la utilización de la clase spark.components.RadioButtonGroup como una alternativa a esta clase.

The RadioButtonGroup control defines a group of RadioButton controls that act as a single mutually exclusive control; therefore, a user can select only one RadioButton control at a time. While grouping RadioButton instances in a RadioButtonGroup is optional, a group lets you do things like set a single event handler on a group of buttons, rather than on each individual button.

The id property is required when you use the <mx:RadioButtonGroup> tag to define the name of the group.

Notice that the RadioButtonGroup control is a subclass of EventDispatcher, not UIComponent, and implements the IMXMLObject interface. All other Flex visual components are subclasses of UIComponent, which implements the IUIComponent interface. The RadioButtonGroup control has support built into the Flex compiler that allows you to use the RadioButtonGroup control as a child of a Flex container, even though it does not implement IUIComponent. All other container children must implement the IUIComponent interface.

Therefore, if you try to define a visual component as a subclass of EventDispatcher that implements the IMXMLObject interface, you will not be able to use it as the child of a container.

Sintaxis MXMLexpandedOcultar sintaxis MXML

The <mx:RadioButtonGroup> tag inherits all of the tag attributes of its superclass, and adds the following tag attributes:

  <mx:RadioButtonGroup
    Properties
    enabled="true|false"
    id="No default"
    labelPlacement="right|left|top|bottom"
 
    Events
    change="No default"
    itemClick="No default"
  />
  

Ver los ejemplos

Más ejemplos

Elementos de API relacionados



Propiedades públicas
 PropiedadDefinido por
 Inheritedconstructor : Object
Una referencia a la clase de objeto o función constructora para una instancia de objeto determinada.
Object
  enabled : Boolean
Determines whether selection is allowed.
RadioButtonGroup
  labelPlacement : String
Position of the RadioButton label relative to the RadioButton icon for each control in the group.
RadioButtonGroup
  numRadioButtons : int
[solo lectura] The number of RadioButtons that belong to this RadioButtonGroup.
RadioButtonGroup
  selectedValue : Object
The value of the value property of the selected RadioButton control in the group, if this has been set to be something other than null (the default value).
RadioButtonGroup
  selection : RadioButton
Contains a reference to the currently selected RadioButton control in the group.
RadioButtonGroup
Métodos públicos
 MétodoDefinido por
  
Constructor.
RadioButtonGroup
 Inherited
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registra un objeto de detector de eventos con un objeto EventDispatcher, de modo que el detector reciba la notificación de un evento.
EventDispatcher
 Inherited
Distribuye un evento en el flujo del evento.
EventDispatcher
  
Returns the RadioButton control at the specified index.
RadioButtonGroup
 Inherited
Comprueba si el objeto EventDispatcher tiene detectores registrados para un tipo concreto de evento.
EventDispatcher
 Inherited
Indica si un objeto tiene definida una propiedad especificada.
Object
  
Implementation of the IMXMLObject.initialized() method to support deferred instantiation.
RadioButtonGroup
 Inherited
Indica si hay una instancia de la clase Object en la cadena de prototipo del objeto especificado como parámetro.
Object
 Inherited
Indica si existe la propiedad especificada y si es enumerable.
Object
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Elimina un detector del objeto EventDispatcher.
EventDispatcher
 Inherited
Establece la disponibilidad de una propiedad dinámica para operaciones de bucle.
Object
 Inherited
Devuelve la representación de cadena de este objeto, con formato según las convenciones específicas de configuración regional.
Object
 Inherited
Devuelve la representación de cadena del objeto especificado.
Object
 Inherited
Devuelve el valor simple del objeto especificado.
Object
 Inherited
Comprueba si hay registrado un detector de eventos con este objeto EventDispatcher o con cualquiera de sus ascendientes para el tipo de evento concreto.
EventDispatcher
Eventos
 Evento Resumen Definido por
 Inherited[evento broadcast] Se distribuye cuando Flash Player o AIR pasan a estar activos.EventDispatcher
  Dispatched when the value of the selected RadioButton control in this group changes.RadioButtonGroup
 Inherited[evento broadcast] Se distribuye cuando Flash Player o de AIR pasan a estar inactivos.EventDispatcher
  Dispatched when a user selects a RadioButton control in the group.RadioButtonGroup
Información sobre propiedades

enabled

propiedad
enabled:Boolean

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 3
Versiones de motor de ejecución: Flash Player 9, AIR 1.1

Determines whether selection is allowed.

El valor predeterminado es true.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento enabledChanged .



Implementación
    public function get enabled():Boolean
    public function set enabled(value:Boolean):void

labelPlacement

propiedad 
labelPlacement:String

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 3
Versiones de motor de ejecución: Flash Player 9, AIR 1.1

Position of the RadioButton label relative to the RadioButton icon for each control in the group. You can override this setting for the individual controls.

Valid values in MXML are "right", "left", "bottom", and "top".

In ActionScript, you use the following constants to set this property: ButtonLabelPlacement.RIGHT, ButtonLabelPlacement.LEFT, ButtonLabelPlacement.BOTTOM, and ButtonLabelPlacement.TOP.

El valor predeterminado es "right".

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento labelPlacementChanged .



Implementación
    public function get labelPlacement():String
    public function set labelPlacement(value:String):void

numRadioButtons

propiedad 
numRadioButtons:int  [solo lectura]

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 3
Versiones de motor de ejecución: Flash Player 9, AIR 1.1

The number of RadioButtons that belong to this RadioButtonGroup.

El valor predeterminado es "undefined".

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento numRadioButtonsChanged .



Implementación
    public function get numRadioButtons():int

selectedValue

propiedad 
selectedValue:Object

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 3
Versiones de motor de ejecución: Flash Player 9, AIR 1.1

The value of the value property of the selected RadioButton control in the group, if this has been set to be something other than null (the default value). Otherwise, selectedValue is the value of the label property of the selected RadioButton. If no RadioButton is selected, this property is null.

If you set selectedValue, Flex selects the RadioButton control whose value or label property matches this value.

El valor predeterminado es null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento valueCommit .



Implementación
    public function get selectedValue():Object
    public function set selectedValue(value:Object):void

selection

propiedad 
selection:RadioButton

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 3
Versiones de motor de ejecución: Flash Player 9, AIR 1.1

Contains a reference to the currently selected RadioButton control in the group. You can access the property in ActionScript only; it is not settable in MXML. Setting this property to null deselects the currently selected RadioButton control.

El valor predeterminado es null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento valueCommit .



Implementación
    public function get selection():RadioButton
    public function set selection(value:RadioButton):void
Información sobre constructores

RadioButtonGroup

()Información sobre
public function RadioButtonGroup(document:IFlexDisplayObject = null)

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 3
Versiones de motor de ejecución: Flash Player 9, AIR 1.1

Constructor.

Parámetros
document:IFlexDisplayObject (default = null) — In simple cases where a class extends EventDispatcher, the document parameter should not be used.

Elementos de API relacionados

Información sobre métodos

getRadioButtonAt

()método
public function getRadioButtonAt(index:int):RadioButton

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 3
Versiones de motor de ejecución: Flash Player 9, AIR 1.1

Returns the RadioButton control at the specified index.

Parámetros

index:int — The index of the RadioButton control in the RadioButtonGroup control, where the index of the first control is 0.

Valor devuelto
RadioButton — The specified RadioButton control.

initialized

()método 
public function initialized(document:Object, id:String):void

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 3
Versiones de motor de ejecución: Flash Player 9, AIR 1.1

Implementation of the IMXMLObject.initialized() method to support deferred instantiation.

Parámetros

document:Object — The MXML document that created this object.
 
id:String — The identifier used by document to refer to this object. If the object is a deep property on document, id is null.

Elementos de API relacionados

Información sobre eventos

change

Evento
Tipo de objeto de evento: flash.events.Event
propiedad Event.type = flash.events.Event.CHANGE

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 3
Versiones de motor de ejecución: Flash Player 9, AIR 1.1

Dispatched when the value of the selected RadioButton control in this group changes.

La constante Event.CHANGE define el valor de la propiedad type de un objeto de evento change.

Este evento tiene las propiedades siguientes:

PropiedadValor
bubblestrue
cancelablefalse; no hay ningún comportamiento predeterminado que cancelar.
currentTargetObjeto que procesa de forma activa el objeto de evento con un detector de eventos.
targetObjeto al que se ha modificado su valor. El objeto target no siempre es el objeto de la lista de visualización que registró el detector de eventos. Utilice la propiedad currentTarget para acceder al objeto de la lista de visualización que está procesando el evento actualmente.

itemClick

Evento  
Tipo de objeto de evento: mx.events.ItemClickEvent
propiedad ItemClickEvent.type = mx.events.ItemClickEvent.ITEM_CLICK

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 3
Versiones de motor de ejecución: Flash Player 9, AIR 1.1

Dispatched when a user selects a RadioButton control in the group. You can also set a handler for individual RadioButton controls.

The ItemClickEvent.ITEM_CLICK constant defines the value of the type property of the event object for an itemClick event.

The properties of the event object have the following values:

PropertyValue
bubblesfalse
cancelablefalse
currentTargetThe 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.
indexThe index of the navigation item that was clicked.
itemThe item in the data provider of the navigation item that was clicked.
labelThe label of the navigation item that was clicked.
relatedObjectThe child object that generated the event.
targetThe 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.
RadioButtonGroupExample.mxml
<?xml version="1.0" encoding="utf-8"?>
<!-- Simple example to demonstrate Halo RadioButtonGroup control. -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/mx">

    <fx:Script>
        <![CDATA[
            import mx.controls.Alert;
            import  mx.events.ItemClickEvent;
        
            // Event handler function to display the selected button
            // in a Halo Alert control.
            private function handleCard(evt:ItemClickEvent):void {
                switch (evt.currentTarget.selectedValue) {
                    case "AmEx":
                        Alert.show("You selected American Express");
                        break;
                    case "MC":
                        Alert.show("You selected MasterCard");
                        break;
                    case "Visa":
                        Alert.show("You selected Visa");
                        break;
                }
            }
        ]]>
    </fx:Script>

    <fx:Declarations>
        <mx:RadioButtonGroup id="cardtype" itemClick="handleCard(event);"/>
    </fx:Declarations>

    <s:Panel title="Halo RadioButtonGroup Control Example"
            width="75%" height="75%" 
            horizontalCenter="0" verticalCenter="0">
        <s:VGroup left="10" right="10" top="10" bottom="10">
            <s:Label width="100%" color="blue" 
                    text="Select a type of credit card."/>

            <mx:RadioButton groupName="cardtype" id="americanExpress" value="AmEx" 
                    label="American Express" width="150" />
            <mx:RadioButton groupName="cardtype" id="masterCard" value="MC" 
                    label="MasterCard" width="150" />
            <mx:RadioButton groupName="cardtype" id="visa" value="Visa" 
                    label="Visa" width="150" />
        </s:VGroup>
    </s:Panel>

</s:Application>




[ X ]¿Por qué hay texto en inglés?
Cierto contenido de la Referencia de ActionScript 3.0 se muestra en inglés

No todo el contenido de la Referencia de ActionScript 3.0 se traduce a todos los idiomas. Si un elemento del lenguaje no se traduce, aparecerá en inglés. Por ejemplo, la clase ga.controls.HelpBox no está traducida en ningún idioma. Por lo tanto, en la versión en español de la referencia, la clase ga.controls.HelpBox aparecerá en inglés.