FocusManager

Paket	mx.managers
Klass	public class FocusManager
Arv	FocusManager EventDispatcher Object
Implementerar	IFocusManager

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

The FocusManager class manages the focus on components in response to mouse activity or keyboard activity (Tab key). There can be several FocusManager instances in an application. Each FocusManager instance is responsible for a set of components that comprise a "tab loop". If you hit Tab enough times, focus traverses through a set of components and eventually get back to the first component that had focus. That is a "tab loop" and a FocusManager instance manages that loop. If there are popup windows with their own set of components in a "tab loop" those popup windows will have their own FocusManager instances. The main application always has a FocusManager instance.

The FocusManager manages focus from the "component level". In Flex, a UITextField in a component is the only way to allow keyboard entry of text. To the Flash Player or AIR, that UITextField has focus. However, from the FocusManager's perspective the component that parents the UITextField has focus. Thus there is a distinction between component-level focus and player-level focus. Application developers generally only have to deal with component-level focus while component developers must understand player-level focus.

All components that can be managed by the FocusManager must implement mx.managers.IFocusManagerComponent, whereas objects managed by player-level focus do not.

The FocusManager also managers the concept of a defaultButton, which is the Button on a form that dispatches a click event when the Enter key is pressed depending on where focus is at that time.

Fler exempel

Focus in sandboxed applications
Focus in multi-versioned applications

Publika egenskaper

Dölj ärvda publika egenskaper

Visa ärvda publika egenskaper

	Egenskap		Definieras med
		constructor : Object En referens till klassobjektet eller konstruktorfunktionen för en given objektinstans.	Object
		defaultButton : IButton A reference to the original default Button control.	FocusManager
		defaultButtonEnabled : Boolean A flag that indicates whether the FocusManager should check for the Enter key being pressed to activate the default button.	FocusManager
		focusPane : Sprite A single Sprite that is moved from container to container as the focus moves to those containers.	FocusManager
		nextTabIndex : int [skrivskyddad] The next unique tab index to use in this tab loop.	FocusManager
		showFocusIndicator : Boolean A flag that indicates whether to display an indicator that a component has focus.	FocusManager

Publika metoder

Dölj ärvda publika metoder

Visa ärvda publika metoder

	Metod		Definieras med
		FocusManager(container:IFocusManagerContainer, popup:Boolean = false) Constructor.	FocusManager
		activate():void The SystemManager activates and deactivates a FocusManager if more than one IFocusManagerContainer is visible at the same time.	FocusManager
		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
		deactivate():void The SystemManager activates and deactivates a FocusManager if more than one IFocusManagerContainer is visible at the same time.	FocusManager
		dispatchEvent(event:Event):Boolean Skickar en händelse till händelseflödet.	EventDispatcher
		findFocusManagerComponent(o:InteractiveObject):IFocusManagerComponent Returns the IFocusManagerComponent that contains the given object, if any.	FocusManager
		getFocus():IFocusManagerComponent Gets the IFocusManagerComponent component that currently has the focus.	FocusManager
		getNextFocusManagerComponent(backward:Boolean = false):IFocusManagerComponent Returns the IFocusManagerComponent that would receive focus if the user pressed the Tab key to navigate to another component.	FocusManager
		hasEventListener(type:String):Boolean Kontrollerar om EventDispatcher-objektet har några avlyssnare registrerade för en viss typ av händelse.	EventDispatcher
		hasOwnProperty(name:String):Boolean Anger om det finns en egenskap angiven för ett objekt.	Object
		hideFocus():void Sets showFocusIndicator to false and removes the visual focus indicator from the focused object, if any.	FocusManager
		isPrototypeOf(theClass:Object):Boolean Anger om en instans av klassen Object finns i prototypkedjan för objektet som anges som parameter.	Object
		propertyIsEnumerable(name:String):Boolean Anger om den angivna egenskapen finns och är uppräkningsbar.	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Tar bort en avlyssnare från EventDispatcher-objektet.	EventDispatcher
		setFocus(o:IFocusManagerComponent):void Sets focus to an IFocusManagerComponent component.	FocusManager
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Anger tillgänglighet för en dynamisk egenskap för slingåtgärder.	Object
		showFocus():void Sets showFocusIndicator to true and draws the visual focus indicator on the focused object, if any.	FocusManager
		toLocaleString():String Returnerar det här objektets strängrepresentation, formaterad i enlighet med språkspecifika konventioner.	Object
		toString():String [åsidosätt] Returns a String representation of the component hosting the FocusManager object, with the String ".focusManager" appended to the end of the String.	FocusManager
		valueOf():Object Returnerar det angivna objektets primitiva värde.	Object
		willTrigger(type:String):Boolean Kontrollerar om en händelseavlyssnare är registrerad för det här EventDispatcher-objektet eller något av dess överordnade objekt för den angivna händelsetypen.	EventDispatcher

Händelser

Klicka för mer information om händelser

Dölj ärvda händelser

Visa ärvda händelser

	Händelse		Sammanfattning	Definieras med
		activate	[utsändningshändelse] Skickas när Flash Player eller AIR får operativsystemfokus och blir aktivt.	EventDispatcher
		deactivate	[utsändningshändelse] Skickas när Flash Player eller AIR förlorar operativsystemfokus och blir inaktivt.	EventDispatcher

Egenskapsdetaljer

defaultButton

egenskap

defaultButton:IButton

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

A reference to the original default Button control. Pressing the Enter key while the focus is on any control activates the Button control by dispatching a click event on the Button control, just as if it was clicked with the mouse. The actual default Button control changes if focus is given to another Button control, but switches back to the original if focus is not on a button.

This property is managed by Flex containers; do not set it directly to specify the default button.

The defaultButton must be of class mx.controls.Button even though this property is of type IUIComponent.

Implementering
public function get defaultButton():IButton
public function set defaultButton(value:IButton):void

defaultButtonEnabled

egenskap

defaultButtonEnabled:Boolean

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

A flag that indicates whether the FocusManager should check for the Enter key being pressed to activate the default button. TextArea and other components that want to recognize the Enter key set this property to false to disable the Enter key from dispatching a click event on the default button, if it exists.

Implementering
public function get defaultButtonEnabled():Boolean
public function set defaultButtonEnabled(value:Boolean):void

focusPane

egenskap

focusPane:Sprite

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

A single Sprite that is moved from container to container as the focus moves to those containers. The Sprite is used as the parent of the visual indicator that a component has focus.

Implementering
public function get focusPane():Sprite
public function set focusPane(value:Sprite):void

nextTabIndex

egenskap

nextTabIndex:int [skrivskyddad]

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

The next unique tab index to use in this tab loop.

Implementering
public function get nextTabIndex():int

showFocusIndicator

egenskap

showFocusIndicator:Boolean

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

A flag that indicates whether to display an indicator that a component has focus. If true a component receiving focus draws a visible indicator that it has focus.

By default, this is false until the user uses the Tab key, then it is set to true.

In general it is better to use the showFocus() and hideFocus() methods to change this property as those methods also update the visual indicator that a component has focus.

Implementering
public function get showFocusIndicator():Boolean
public function set showFocusIndicator(value:Boolean):void

Konstruktordetaljer

()

Konstruktor

public function FocusManager(container:IFocusManagerContainer, popup:Boolean = false)

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Constructor.

A FocusManager manages the focus within the children of an IFocusManagerContainer. It installs itself in the IFocusManagerContainer during execution of the constructor.

Parametrar

	`container:IFocusManagerContainer` — An IFocusManagerContainer that hosts the FocusManager.

	`popup:Boolean` (default = `false`) — If `true`, indicates that the container is a popup component and not the main application.

Metoddetaljer

activate

()

metod

public function activate():void

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

The SystemManager activates and deactivates a FocusManager if more than one IFocusManagerContainer is visible at the same time. If the mouse is clicked in an IFocusManagerContainer with a deactivated FocusManager, the SystemManager will call the activate() method on that FocusManager. The FocusManager that was activated will have its deactivate() method called prior to the activation of another FocusManager.

The FocusManager adds event handlers that allow it to monitor focus related keyboard and mouse activity.

deactivate

()

metod

public function deactivate():void

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

The FocusManager removes event handlers that allow it to monitor focus related keyboard and mouse activity.

findFocusManagerComponent

()

metod

public function findFocusManagerComponent(o:InteractiveObject):IFocusManagerComponent

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Returns the IFocusManagerComponent that contains the given object, if any. Because the player can set focus to a subcomponent of a Flex component this method determines which IFocusManagerComponent has focus from the component perspective.

Parametrar

o:InteractiveObject — An object that can have player-level focus.

Returnerar

IFocusManagerComponent — The IFOcusManagerComponent containing o or null

getFocus

()

metod

public function getFocus():IFocusManagerComponent

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Gets the IFocusManagerComponent component that currently has the focus. Calling this method is recommended instead of using the Stage object because it indicates which component has focus. The Stage might return a subcomponent in that component.

Returnerar

IFocusManagerComponent — IFocusManagerComponent object that has focus.

getNextFocusManagerComponent

()

metod

public function getNextFocusManagerComponent(backward:Boolean = false):IFocusManagerComponent

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Returns the IFocusManagerComponent that would receive focus if the user pressed the Tab key to navigate to another component. It will return the same component as the current focused component if there are no other valid components in the application.

Parametrar

backward:Boolean (default = false) — If true, return the object as if the Shift-Tab keys were pressed.

Returnerar

IFocusManagerComponent — The component that would receive focus.

hideFocus

()

metod

public function hideFocus():void

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Sets showFocusIndicator to false and removes the visual focus indicator from the focused object, if any.

setFocus

()

metod

public function setFocus(o:IFocusManagerComponent):void

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Sets focus to an IFocusManagerComponent component. Does not check for the components visibility, enabled state, or any other conditions.

Parametrar

o:IFocusManagerComponent — A component that can receive focus.

showFocus

()

metod

public function showFocus():void

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Sets showFocusIndicator to true and draws the visual focus indicator on the focused object, if any.

toString

()

metod

override public function toString():String

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Returns a String representation of the component hosting the FocusManager object, with the String ".focusManager" appended to the end of the String.

Returnerar

String — Returns a String representation of the component hosting the FocusManager object, with the String ".focusManager" appended to the end of the String.

Juridiska meddelanden | Onlinesekretesspolicy

FocusManager - AS3 Flex

Klasser x

defaultButton

defaultButtonEnabled

focusPane

nextTabIndex

showFocusIndicator

FocusManager

activate

deactivate

findFocusManagerComponent

getFocus

getNextFocusManagerComponent

hideFocus

setFocus

showFocus

toString