CSSStyleDeclaration

Pacchetto	mx.styles
Classe	public class CSSStyleDeclaration
Ereditarietà	CSSStyleDeclaration EventDispatcher Object
Sottoclassi	AdvancedDataGridColumn, DataGridColumn

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

The CSSStyleDeclaration class represents a set of CSS style rules. The MXML compiler automatically generates one CSSStyleDeclaration object for each selector in the CSS files associated with a Flex application.

A CSS rule such as

      Button { color: #FF0000 }

affects every instance of the Button class; a selector like Button is called a type selector and must not start with a dot.

A CSS rule such as

      .redButton { color: #FF0000 }

affects only components whose styleName property is set to "redButton"; a selector like .redButton is called a class selector and must start with a dot.

You can access the autogenerated CSSStyleDeclaration objects using the StyleManager.getStyleDeclaration() method, passing it either a type selector

  var buttonDeclaration:CSSStyleDeclaration =
      StyleManager.getStyleDeclaration("Button");

or a class selector

  var redButtonStyleDeclaration:CSSStyleDeclaration =
      StyleManager.getStyleDeclaration(".redButton");

You can use the getStyle(), setStyle(), and clearStyle() methods to get, set, and clear style properties on a CSSStyleDeclaration.

You can also create and install a CSSStyleDeclaration at run time using the StyleManager.setStyleDeclaration() method:

  var newStyleDeclaration:CSSStyleDeclaration = new CSSStyleDeclaration(".bigMargins");
  newStyleDeclaration.defaultFactory = function():void
  {
      leftMargin = 50;
      rightMargin = 50;
  }
  StyleManager.setStyleDeclaration(".bigMargins", newStyleDeclaration, true);

Altri esempi

Using the StyleManager class

Elementi API correlati

mx.core.UIComponent
mx.styles.StyleManager

Proprietà pubbliche

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	Proprietà		Definito da
		constructor : Object Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto.	Object
		defaultFactory : Function This function, if it isn't null, is usually autogenerated by the MXML compiler.	CSSStyleDeclaration
		factory : Function This function, if it isn't null, is usually autogenerated by the MXML compiler.	CSSStyleDeclaration
		overrides : Object If the setStyle() method is called on a UIComponent or CSSStyleDeclaration at run time, this object stores the name/value pairs that were set; they override the name/value pairs in the objects produced by the methods specified by the defaultFactory and factory properties.	CSSStyleDeclaration
		selector : CSSSelector This property is the base selector of a potential chain of selectors and conditions that are used to match CSS style declarations to components.	CSSStyleDeclaration
		selectorIndex : int = 0 The order this CSSStyleDeclaration was added to its StyleManager.	CSSStyleDeclaration
		specificity : int [sola lettura] Determines the order of precedence when applying multiple style declarations to a component.	CSSStyleDeclaration
		subject : String [sola lettura] The subject describes the name of a component that may be a potential match for this style declaration.	CSSStyleDeclaration

Metodi pubblici

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	Metodo		Definito da
		CSSStyleDeclaration(selector:Object = null, styleManager:IStyleManager2 = null, autoRegisterWithStyleManager:Boolean = true) Constructor.	CSSStyleDeclaration
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void Registra un oggetto listener di eventi con un oggetto EventDispatcher, in modo che il listener riceva la notifica di un evento.	EventDispatcher
		clearStyle(styleProp:String):void Clears a style property on this CSSStyleDeclaration.	CSSStyleDeclaration
		dispatchEvent(event:Event):Boolean Invia un evento nel flusso di eventi.	EventDispatcher
		getStyle(styleProp:String):* Gets the value for a specified style property, as determined solely by this CSSStyleDeclaration.	CSSStyleDeclaration
		hasEventListener(type:String):Boolean Verifica se per l'oggetto EventDispatcher sono presenti listener registrati per un tipo specifico di evento.	EventDispatcher
		hasOwnProperty(name:String):Boolean Indica se per un oggetto è definita una proprietà specifica.	Object
		isPrototypeOf(theClass:Object):Boolean Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro.	Object
		matchesStyleClient(object:IAdvancedStyleClient):Boolean Determines whether this style declaration applies to the given component based on a match of the selector chain.	CSSStyleDeclaration
		propertyIsEnumerable(name:String):Boolean Indica se la proprietà specificata esiste ed è enumerabile.	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Rimuove un listener dall'oggetto EventDispatcher.	EventDispatcher
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche.	Object
		setStyle(styleProp:String, newValue:*):void Sets a style property on this CSSStyleDeclaration.	CSSStyleDeclaration
		toLocaleString():String Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate.	Object
		toString():String Restituisce la rappresentazione in formato stringa dell'oggetto specificato.	Object
		valueOf():Object Restituisce il valore di base dell'oggetto specificato.	Object
		willTrigger(type:String):Boolean Verifica se un listener di eventi è registrato con questo oggetto EventDispatcher o qualsiasi suo antenato per il tipo di evento specificato.	EventDispatcher

Eventi

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	Evento		Riepilogo	Definito da
		activate	[evento di trasmissione] Inviato quando Flash Player o l'applicazione AIR ottiene lo stato di attivazione del sistema operativo ed entra nello stato attivo.	EventDispatcher
		deactivate	[evento di trasmissione] Inviato quando Flash Player o l'applicazione AIR perde l'attivazione del sistema operativo e sta entrando nello stato inattivo.	EventDispatcher

Descrizione delle proprietà

defaultFactory

proprietà

defaultFactory:Function

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

This function, if it isn't null, is usually autogenerated by the MXML compiler. It produce copies of a plain Object, such as { leftMargin: 10, rightMargin: 10 }, containing name/value pairs for style properties; the object is used to build a node of the prototype chain for looking up style properties.

If this CSSStyleDeclaration is owned by a UIComponent written in MXML, this function encodes the style attributes that were specified on the root tag of the component definition.

If the UIComponent was written in ActionScript, this property is null.

Implementazione
public function get defaultFactory():Function
public function set defaultFactory(value:Function):void

factory

proprietà

factory:Function

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

If this CSSStyleDeclaration is owned by a UIComponent, this function encodes the style attributes that were specified in MXML for an instance of that component.

Implementazione
public function get factory():Function
public function set factory(value:Function):void

overrides

proprietà

overrides:Object

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

If the setStyle() method is called on a UIComponent or CSSStyleDeclaration at run time, this object stores the name/value pairs that were set; they override the name/value pairs in the objects produced by the methods specified by the defaultFactory and factory properties.

Implementazione
public function get overrides():Object
public function set overrides(value:Object):void

selector

proprietà

selector:CSSSelector

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 4

Versioni runtime:

Flash Player 10, AIR 1.5

This property is the base selector of a potential chain of selectors and conditions that are used to match CSS style declarations to components.

Implementazione
public function get selector():CSSSelector
public function set selector(value:CSSSelector):void

selectorIndex

proprietà

public var selectorIndex:int = 0

The order this CSSStyleDeclaration was added to its StyleManager. MatchStyleDeclarations has to return the declarations in the order they were declared

specificity

proprietà

specificity:int [sola lettura]

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 4

Versioni runtime:

Flash Player 10, AIR 1.5

Determines the order of precedence when applying multiple style declarations to a component. If style declarations are of equal precedence, the last one wins.

Implementazione
public function get specificity():int

subject

proprietà

subject:String [sola lettura]

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 4

Versioni runtime:

Flash Player 10, AIR 1.5

The subject describes the name of a component that may be a potential match for this style declaration. The subject is determined as right most simple type selector in a potential chain of selectors.

Implementazione
public function get subject():String

Descrizione della funzione di costruzione

()

Funzione di costruzione

public function CSSStyleDeclaration(selector:Object = null, styleManager:IStyleManager2 = null, autoRegisterWithStyleManager:Boolean = true)

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Constructor.

Parametri

	`selector:Object` (default = `null`) — - If the selector is a CSSSelector then advanced CSS selectors are supported. If a String is used for the selector then only simple CSS selectors are supported. If the String starts with a dot it is interpreted as a universal class selector, otherwise it must represent a simple type selector. If not null, this CSSStyleDeclaration will be registered with StyleManager.

	`styleManager:IStyleManager2` (default = `null`) — - The style manager to set this declaration into. If the styleManager is null the top-level style manager will be used.

	`autoRegisterWithStyleManager:Boolean` (default = `true`) — - If true set the selector in the styleManager. The selector will only be set if both `selector` and `styleManager` are both non-null.

Descrizione dei metodi

clearStyle

()

metodo

public function clearStyle(styleProp:String):void

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Clears a style property on this CSSStyleDeclaration. This is the same as setting the style value to undefined.

Parametri

styleProp:String — The name of the style property.

getStyle

()

metodo

public function getStyle(styleProp:String):*

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Gets the value for a specified style property, as determined solely by this CSSStyleDeclaration.

The returned value may be of any type.

The values null, "", false, NaN, and 0 are all valid style values, but the value undefined is not; it indicates that the specified style is not set on this CSSStyleDeclaration. You can use the method StyleManager.isValidStyleValue() to test the value that is returned.

Parametri

styleProp:String — The name of the style property.

Restituisce

* — The value of the specified style property if set, or undefined if not.

matchesStyleClient

()

metodo

public function matchesStyleClient(object:IAdvancedStyleClient):Boolean

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 4

Versioni runtime:

Flash Player 10, AIR 1.5

Determines whether this style declaration applies to the given component based on a match of the selector chain.

Parametri

object:IAdvancedStyleClient — The component to match the style declaration against.

Restituisce

Boolean — true if this style declaration applies to the component, otherwise false.

setStyle

()

metodo

public function setStyle(styleProp:String, newValue:*):void

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Sets a style property on this CSSStyleDeclaration.

Parametri

	`styleProp:String` — The name of the style property.

	`newValue:*` — The value of the style property. The value may be of any type. The values `null`, `""`, `false`, `NaN`, and `0` are all valid style values, but the value `undefined` is not. Setting a style property to the value `undefined` is the same as calling the `clearStyle()` method.

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CSSStyleDeclaration - AS3 Flex

Classi x

defaultFactory

factory

overrides

selector

selectorIndex

specificity

subject