| Paket | spark.components |
| Klass | public class RadioButtonGroup |
| Arv | RadioButtonGroup  EventDispatcher Object |
| Implementerar | IMXMLObject |
| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
id property is required when you use the
<s:RadioButtonGroup> tag to define the group name. Any
<s:RadioButton> component added to this group will
have this group name.
Notice that the RadioButtonGroup component is a subclass of EventDispatcher,
not UIComponent, and implements the IMXMLObject interface.
All other Flex visual components implement the IVisualElement interface.
The RadioButtonGroup component declaration must
be contained within the <Declarations> tag since it is
not assignable to IVisualElement.
To use this component in a list-based component, such as a List or DataGrid, create an item renderer. For information about creating an item renderer, see Custom Spark item renderers.
MXML-syntax
Visa MXML-syntax
Dölj MXML-syntaxThe <s:RadioButtonGroup> tag inherits all of the
tag attributes of its superclass, and adds the following tag attributes:
<s:RadioButtonGroup
Properties
enabled="true"
selectedValue="null"
selection="null"
Events
change="No default"
itemClick="No default"
valueCommit="No default"
/>
Fler exempel
Relaterade API-element
| Egenskap | Definieras med | ||
|---|---|---|---|
 | constructor : Object
En referens till klassobjektet eller konstruktorfunktionen för en given objektinstans. | Object | |
| enabled : Boolean
Determines whether selection is allowed. | RadioButtonGroup | ||
| numRadioButtons : int [skrivskyddad]
The number of RadioButtons that belong to this RadioButtonGroup. | RadioButtonGroup | ||
| selectedValue : Object
The value property of the selected
RadioButton component in the group, if it has been set,
otherwise, the label property of the selected RadioButton. | RadioButtonGroup | ||
| selection : RadioButton
Contains a reference to the currently selected
RadioButton component in the group. | RadioButtonGroup | ||
| Metod | Definieras med | ||
|---|---|---|---|
RadioButtonGroup(document:IFlexDisplayObject = null)
Constructor. | RadioButtonGroup | ||
| addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registrerar ett händelseavlyssnarobjekt för ett EventDispatcher-objekt så att avlyssnaren får meddelanden om händelser. | EventDispatcher | |
|
Skickar en händelse till händelseflödet. | EventDispatcher | |
Returns the RadioButton component at the specified index. | RadioButtonGroup | ||
|
Kontrollerar om EventDispatcher-objektet har några avlyssnare registrerade för en viss typ av händelse. | EventDispatcher | |
|
Anger om det finns en egenskap angiven för ett objekt. | Object | |
Implementation of the IMXMLObject.initialized() method
to support deferred instantiation. | RadioButtonGroup | ||
|
Anger om en instans av klassen Object finns i prototypkedjan för objektet som anges som parameter. | Object | |
|
Anger om den angivna egenskapen finns och är uppräkningsbar. | Object | |
|
Tar bort en avlyssnare från EventDispatcher-objektet. | EventDispatcher | |
|
Anger tillgänglighet för en dynamisk egenskap för slingåtgärder. | Object | |
|
Returnerar det här objektets strängrepresentation, formaterad i enlighet med språkspecifika konventioner. | Object | |
|
Returnerar det angivna objektets strängbeteckning. | Object | |
|
Returnerar det angivna objektets primitiva värde. | Object | |
|
Kontrollerar om en händelseavlyssnare är registrerad för det här EventDispatcher-objektet eller något av dess överordnade objekt för den angivna händelsetypen. | EventDispatcher | |
| Händelse | Sammanfattning | Definieras med | ||
|---|---|---|---|---|
| [utsändningshändelse] Skickas när Flash Player eller AIR får operativsystemfokus och blir aktivt. | EventDispatcher | ||
| Dispatched when the value of the selected RadioButton component in this group changes. | RadioButtonGroup | |||
| [utsändningshändelse] Skickas när Flash Player eller AIR förlorar operativsystemfokus och blir inaktivt. | EventDispatcher | ||
| Dispatched when a user selects a RadioButton component in the group. | RadioButtonGroup | |||
| Dispatched when values are changed programmatically or by user interaction. | RadioButtonGroup | |||
enabled | egenskap |
enabled:Boolean| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
Determines whether selection is allowed. Note that the value returned
only reflects the value that was explicitly set on the
RadioButtonGroup and does not reflect any values explicitly
set on the individual RadioButtons.
Standardvärdet är true.
Implementering
public function get enabled():Boolean public function set enabled(value:Boolean):voidnumRadioButtons | egenskap |
numRadioButtons:int [skrivskyddad] | Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
The number of RadioButtons that belong to this RadioButtonGroup.
Standardvärdet är "0".
Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen numRadioButtonsChanged .
Implementering
public function get numRadioButtons():intselectedValue | egenskap |
selectedValue:Object| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
The value property of the selected
RadioButton component in the group, if it has been set,
otherwise, the label property of the selected RadioButton.
If no RadioButton is selected, this property is null.
If you set selectedValue, Flex selects the
first RadioButton component whose value or
label property matches this value.
Standardvärdet är null.
Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen valueCommit .
Implementering
public function get selectedValue():Object public function set selectedValue(value:Object):voidselection | egenskap |
selection:RadioButton| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
Contains a reference to the currently selected
RadioButton component in the group.
You can access this property in ActionScript only;
it is not settable in MXML.
Setting this property to null deselects the currently
selected RadioButton component. A change event is not dispatched.
Standardvärdet är null.
Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen valueCommit .
Implementering
public function get selection():RadioButton public function set selection(value:RadioButton):voidRadioButtonGroup | () | Konstruktor |
public function RadioButtonGroup(document:IFlexDisplayObject = null)| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
Constructor.
Parametrardocument:IFlexDisplayObject (default = null)document parameter should not be used.
|
Relaterade API-element
getRadioButtonAt | () | metod |
public function getRadioButtonAt(index:int):RadioButton| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
Returns the RadioButton component at the specified index.
Parametrar
index:int — The 0-based index of the RadioButton in the
RadioButtonGroup.
|
RadioButton — The specified RadioButton component if index is between
0 and numRadioButtons - 1. Returns
null if the index is invalid.
|
Relaterade API-element
initialized | () | metod |
public function initialized(document:Object, id:String):void| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
Implementation of the IMXMLObject.initialized() method
to support deferred instantiation.
Parametrar
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.
|
Relaterade API-element
change | Händelse |
flash.events.Eventegenskap Event.type =
flash.events.Event.CHANGE| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
Dispatched when the value of the selected RadioButton component in this group changes.
Event.CHANGE-konstanten definierar värdet på type-egenskapen i ett change-händelseobjekt.
Den här händelsen har följande egenskaper:
| Egenskap | Värde |
|---|---|
bubbles | true |
cancelable | false; det finns inget standardbeteende att avbryta. |
currentTarget | Det objekt som aktivt behandlar Event-objektet med en händelseavlyssnare. |
target | Objektet vars värde har modifierats. target är inte alltid det objekt i visningslistan som har registrerat händelseavlyssnaren. Använd egenskapen currentTarget om du vill komma åt det objekt i visningslistan som bearbetar händelsen. |
itemClick | Händelse |
mx.events.ItemClickEventegenskap ItemClickEvent.type =
mx.events.ItemClickEvent.ITEM_CLICK| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
Dispatched when a user selects a RadioButton component in the group. You can also set a handler for individual RadioButton components. This event is dispatched only when the user interacts with the radio buttons by using the mouse.
TheItemClickEvent.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:
| 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. |
index | The index of the navigation item that was clicked. |
item | The item in the data provider of the navigation item that was clicked. |
label | The label of the navigation item that was clicked. |
relatedObject | The child object that generated the event. |
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. |
valueCommit | Händelse |
mx.events.FlexEventegenskap FlexEvent.type =
mx.events.FlexEvent.VALUE_COMMIT| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
Dispatched when values are changed programmatically or by user interaction.
Because a programmatic change triggers this event, make sure
that any valueCommit event handler does not change
a value that causes another valueCommit event.
For example, do not change theselectedValue
property or selection property in a valueCommit
event handler.
FlexEvent.VALUE_COMMIT constant defines the value of the
type property of the event object for a valueCommit
event.
The properties of the event object have the following values:
| 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. |
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. |
<?xml version="1.0" encoding="utf-8"?>
<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;
private function handlePayment(event:ItemClickEvent):void {
if (event.currentTarget.selectedValue == "check") {
Alert.show("You opted to pay by check.");
} else if (event.currentTarget.selectedValue == "credit") {
Alert.show("You opted to pay by credit card.");
}
}
]]>
</fx:Script>
<fx:Declarations>
<s:RadioButtonGroup id="paymentType" itemClick="handlePayment(event);"/>
</fx:Declarations>
<s:VGroup paddingLeft="10" paddingTop="10">
<s:RadioButton groupName="paymentType"
id="payCheck"
value="check"
label="Pay by check"
width="150"/>
<s:RadioButton groupName="paymentType"
id="payCredit"
value="credit"
label="Pay by credit card"
width="150"/>
</s:VGroup>
</s:Application>
Tue Jun 12 2018, 01:40 PM Z