| Paket | mx.states |
| Klass | public class AddChild |
| Arv | AddChild  OverrideBase OnDemandEventDispatcher Object |
| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
overrides property of the State class.
Use the creationPolicy property to specify to create the child
at application startup or when you change to a view state.
The child does not dispatch the creationComplete event until
it is added to a container. For example, the following code adds a
Button control as part of a view state change:
<mx:AddChild relativeTo="{v1}">
<mx:Button id="b0" label="New Button"/>
</mx:AddChild>
In the previous example, the Button control does not dispatch
the creationComplete event until you change state and the
Button control is added to a container.
If the AddChild class defines both the Button and a container, such as a Canvas container,
then the Button control dispatches the creationComplete event when it is created.
For example, if the creationPolicy property is set to all,
the Button control dispatches the event at application startup.
If the creationPolicy property is set to auto,
the Button control dispatches the event when you change to the view state.
Visa MXML-syntax
Dölj MXML-syntaxThe <mx:AddChild> tag
has the following attributes:
<mx:AddChild Properties target="null" targetFactory="null" creationPolicy="auto" position="lastChild" relativeTo="parent of the State object" />
MXML-standardegenskaptargetFactory
Relaterade API-element
| Egenskap | Definieras med | ||
|---|---|---|---|
 | constructor : Object
En referens till klassobjektet eller konstruktorfunktionen för en given objektinstans. | Object | |
| creationPolicy : String
The creation policy for this child. | AddChild | ||
| position : String
The position of the child in the display list, relative to the
object specified by the relativeTo property. | AddChild | ||
| relativeTo : Object
The object relative to which the child is added. | AddChild | ||
| target : DisplayObject
The child to be added. | AddChild | ||
| targetFactory : IDeferredInstance
The factory that creates the child. | AddChild | ||
| Metod | Definieras med | ||
|---|---|---|---|
Constructor. | AddChild | ||
| addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener
receives notification of an event. | OnDemandEventDispatcher | |
[åsidosätt]
Applies the override. | AddChild | ||
Creates the child instance from the factory. | AddChild | ||
|
Dispatches an event into the event flow. | OnDemandEventDispatcher | |
|
Checks whether the EventDispatcher object has any listeners registered for a specific type
of event. | OnDemandEventDispatcher | |
|
Anger om det finns en egenskap angiven för ett objekt. | Object | |
[åsidosätt]
IOverride interface method; this class implements it as an empty method. | AddChild | ||
|
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 | |
[åsidosätt]
Removes the override. | AddChild | ||
|
Removes a listener from the EventDispatcher object. | OnDemandEventDispatcher | |
|
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 | |
|
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type. | OnDemandEventDispatcher | |
creationPolicy | egenskap |
creationPolicy:String| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
The creation policy for this child.
This property determines when the targetFactory will create
the instance of the child.
Flex uses this properthy only if you specify a targetFactory property.
The following values are valid:
| Value | Meaning |
|---|---|
auto | (default)Create the instance the first time it is needed. |
all | Create the instance when the application started up. |
none | Do not automatically create the instance.
You must call the createInstance() method to create
the instance. |
Standardvärdet är "auto".
Implementering
public function get creationPolicy():String public function set creationPolicy(value:String):voidposition | egenskap |
public var position:String| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
The position of the child in the display list, relative to the
object specified by the relativeTo property.
Valid values are "before", "after",
"firstChild", and "lastChild".
Standardvärdet är "lastChild".
relativeTo | egenskap |
public var relativeTo:Object| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
The object relative to which the child is added. This property is used
in conjunction with the position property.
This property is optional; if
you omit it, Flex uses the immediate parent of the State
object, that is, the component that has the states
property, or <mx:states>tag that specifies the State
object.
target | egenskap |
target:DisplayObject| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
The child to be added.
If you set this property, the child instance is created at app startup.
Setting this property is equivalent to setting a targetFactory
property with a creationPolicy of "all".
Do not set this property if you set the targetFactory
property.
Implementering
public function get target():DisplayObject public function set target(value:DisplayObject):voidtargetFactory | egenskap |
targetFactory:IDeferredInstance| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
The factory that creates the child. You can specify either of the following items:
- A factory class that implements the IDeferredInstance interface and creates the child instance or instances.
- A Flex component, (that is, any class that is a subclass of the UIComponent class), such as the Button contol. If you use a Flex component, the Flex compiler automatically wraps the component in a factory class.
If you set this property, the child is instantiated at the time
determined by the creationPolicy property.
Do not set this property if you set the target
property.
This propety is the AddChild class default property.
Setting this property with a creationPolicy of "all"
is equivalent to setting a target property.
Implementering
public function get targetFactory():IDeferredInstance public function set targetFactory(value:IDeferredInstance):voidAddChild | () | Konstruktor |
public function AddChild(relativeTo:UIComponent = null, target:DisplayObject = null, position:String = "lastChild")| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
Constructor.
ParametrarrelativeTo:UIComponent (default = null) | |
target:DisplayObject (default = null) | |
position:String (default = "lastChild")target
relative to the relativeTo component. Must be one of the following:
"firstChild", "lastChild", "before" or "after".
|
apply | () | metod |
override public function apply(parent:UIComponent):void| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
Applies the override. Flex retains the original value, so that it can
restore the value later in the remove() method.
This method is called automatically when the state is entered. It should not be called directly.
Parametrar
parent:UIComponent — The parent of the state object containing this override.
The override should use this as its target if an explicit target was
not specified.
|
createInstance | () | metod |
public function createInstance():void| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
Creates the child instance from the factory.
You must use this method only if you specify a targetFactory
property and a creationPolicy value of "none".
Flex automatically calls this method if the creationPolicy
property value is "auto" or "all".
If you call this method multiple times, the child instance is
created only on the first call.
initialize | () | metod |
override public function initialize():void| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
IOverride interface method; this class implements it as an empty method.
remove | () | metod |
override public function remove(parent:UIComponent):void| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 3 |
| Körningsmiljöversioner: | Flash Player 9, AIR 1.1 |
Removes the override. The value remembered in the apply()
method is restored.
This method is called automatically when the state is entered. It should not be called directly.
Parametrar
parent:UIComponent — The parent of the state object containing this override.
The override should use this as its target if an explicit target was
not specified.
|
Tue Jun 12 2018, 01:40 PM Z