| Pakiet | mx.core |
| Klasa | public class UIComponentDescriptor |
| Dziedziczenie | UIComponentDescriptor  ComponentDescriptor Object |
| Wersja języka: | ActionScript 3.0 |
| Wersja produktu: | Flex 3 |
| Wersje środowiska wykonawczego: | Flash Player 9, AIR 1.1 |
Most of the tags in an MXML file describe a tree of UIComponent objects.
For example, the <mx:Application> tag represents a
UIComponent object, and its child containers and controls are all
UIComponent objects.
The MXML compiler compiles each of these MXML tags into a UIComponentDescriptor instance. To be precise, the MXML compiler autogenerates an ActionScript data structure which is a tree of UIComponentDescriptor objects.
At runtime, the createComponentsFromDescriptors() method
of the Container class uses the information in the UIComponentDescriptor
objects in the container's childDescriptors array to create
the actual UIComponent objects that are the container's children,
plus deeper descendants as well.
Depending on the value of the container's creationPolicy,
property, the descendants might be created at application startup,
when some part of the component is about to become visible,
or when the application developer manually calls
the createComponentsFromDescriptors() method.
You do not typically create UIComponentDescriptor instances yourself;
you can access the ones that the MXML compiler autogenerates via the
childDescriptors array of the Container class.
Powiązane elementy interfejsu API
mx.core.Container.creationPolicy
mx.core.Container.createComponentsFromDescriptors()
Ukryj dziedziczone właściwości publiczne
Pokaż dziedziczone właściwości publiczne| Właściwość | Zdefiniowane przez | ||
|---|---|---|---|
 | constructor : Object
Odwołanie do obiektu klasy lub funkcji konstruktora, dotyczące danej instancji obiektu. | Object | |
| document : Object
A reference to the document Object in which the component
is to be created. | ComponentDescriptor | |
| effects : Array
An Array containing the effects for the component, as specified in MXML. | UIComponentDescriptor | ||
| events : Object
An Object containing name/value pairs for the component's
event handlers, as specified in MXML. | ComponentDescriptor | |
| id : String
The identifier for the component, as specified in MXML. | ComponentDescriptor | |
| properties : Object [tylko do odczytu]
An Object containing name/value pairs for the component's properties,
as specified in MXML. | ComponentDescriptor | |
| propertiesFactory : Function
A Function that returns an Object containing name/value pairs
for the component's properties, as specified in MXML. | ComponentDescriptor | |
| stylesFactory : Function
A Function that constructs an Object containing name/value pairs
for the instance styles for the component, as specified in MXML. | UIComponentDescriptor | ||
| type : Class
The Class of the component, as specified in MXML. | ComponentDescriptor | |
| Metoda | Zdefiniowane przez | ||
|---|---|---|---|
UIComponentDescriptor(descriptorProperties:Object)
Constructor. | UIComponentDescriptor | ||
|
Wskazuje, czy dla obiektu zdefiniowano określoną właściwość. | Object | |
|
Invalidates the cached properties property. | ComponentDescriptor | |
|
Wskazuje, czy instancja klasy Object należy do łańcucha prototypów obiektu określonego jako parametr. | Object | |
|
Wskazuje, czy określona właściwość istnieje i jest przeliczalna. | Object | |
|
Ustawia dostępność właściwości dynamicznej używanej w pętlach. | Object | |
|
Zwraca ciąg reprezentujący obiekt — sformatowany zgodnie z konwencjami właściwymi dla ustawień regionalnych. | Object | |
|
Returns the string "ComponentDescriptor_" plus the value of the
id property. | ComponentDescriptor | |
|
Zwraca pierwotną wartość dla określonego obiektu. | Object | |
effects | właściwość |
public var effects:Array| Wersja języka: | ActionScript 3.0 |
| Wersja produktu: | Flex 3 |
| Wersje środowiska wykonawczego: | Flash Player 9, AIR 1.1 |
An Array containing the effects for the component, as specified in MXML.
For example, if you write the following code:
<mx:TextInput showEffect="Fade" hideEffect="Fade"/>
The descriptor's effects property is the Array
[ "showEffect", "hideEffect" ].
The effectsproperty is null
if no MXML effects were specified for the component.
Note that the values of the effect attributes are not specified
in this property.
Instead, effects are treated like styles and therefore are include
in the stylesFactory property.
The effect Array simply keeps track of which styles
in the stylesFactory are actually effects.
This property is used by the Container method
createComponentsFromDescriptors()
to register the effects with the EffectManager.
stylesFactory | właściwość |
public var stylesFactory:Function| Wersja języka: | ActionScript 3.0 |
| Wersja produktu: | Flex 3 |
| Wersje środowiska wykonawczego: | Flash Player 9, AIR 1.1 |
A Function that constructs an Object containing name/value pairs for the instance styles for the component, as specified in MXML.
For example, if you write the following code:
<mx:TextInput borderColor="0x888888" color="0xDDDDDD"/>
Then the descriptors' stylesFactory property
is the Function:
function():void { this.borderColor = 0x888888; this.color = 0xDDDDDD };
The stylesFactory property is null
if no MXML styles were specified for the component instance.
UIComponentDescriptor | () | Konstruktor |
public function UIComponentDescriptor(descriptorProperties:Object)| Wersja języka: | ActionScript 3.0 |
| Wersja produktu: | Flex 3 |
| Wersje środowiska wykonawczego: | Flash Player 9, AIR 1.1 |
Constructor.
ParametrydescriptorProperties:Object — An Object containing name/value pairs
for the properties of the UIComponentDescriptor object, such as its
type, id, propertiesFactory,
events, stylesFactory,
and effects.
|
Tue Jun 12 2018, 12:06 PM Z