IItemRenderer - Guida di riferimento alle API Adobe ActionScript® 3 (AS3 Flex)

Pacchetto	spark.components
Interfaccia	public interface IItemRenderer extends IDataRenderer , IVisualElement , ILayoutElement , ILayoutDirectionElement , IEventDispatcher
Implementatori	AttachmentIconRenderer, ButtonBarButton, DefaultItemRenderer, DefaultItemRenderer, GapDisplayer, ItemRenderer, LabelItemRenderer, ModuleItemRenderer, TableRowNameDisplayer, TargetAreaAssignmentEditor, TargetAreaRenderer

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 4

Versioni runtime:

Flash Player 10, AIR 1.5

The IItemRenderer interface defines the basic set of APIs that a class must implement to create an item renderer that can communicate with a host component. The host component, such as the List or ButtonBar controls, must implement the IItemRendererOwner interface.

Elementi API correlati

spark.components.IItemRendererOwner

Proprietà pubbliche

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	Proprietà		Definito da
		alpha : Number Indica il valore della trasparenza alfa dell'oggetto specificato.	IVisualElement
		baseline : Object The vertical distance in pixels from the anchor target to the control's baseline position.	ILayoutElement
		baselinePosition : Number [sola lettura] The y-coordinate of the baseline of the first line of text of the component.	ILayoutElement
		bottom : Object The vertical distance in pixels from the bottom edge of the component to the anchor target's bottom edge.	ILayoutElement
		data : Object The data to render or edit.	IDataRenderer
		depth : Number Determines the order in which items inside of containers are rendered.	IVisualElement
		designLayer : DesignLayer Specifies the optional DesignLayer instance associated with this visual element.	IVisualElement
		dragging : Boolean Contains true if the item renderer is being dragged.	IItemRenderer
		hasLayoutMatrix3D : Boolean [sola lettura] Contains true if the element has 3D Matrix.	ILayoutElement
		height : Number Indica l'altezza dell'oggetto di visualizzazione espressa in pixel.	IVisualElement
		horizontalCenter : Object The horizontal distance in pixels from the center of the component to the center of the anchor target's content area.	ILayoutElement
		includeInLayout : Boolean Specifies whether this component is included in the layout of the parent container.	ILayoutElement
		is3D : Boolean [sola lettura] Contains true when the element is in 3D.	IVisualElement
		itemIndex : int The index of the item in the data provider of the host component of the item renderer.	IItemRenderer
		label : String The String to display in the item renderer.	IItemRenderer
		layoutDirection : String Specifies the desired layout direction for an element: one of LayoutDirection.LTR (left to right), LayoutDirection.RTL (right to left), or null (inherit).	ILayoutDirectionElement
		left : Object The horizontal distance in pixels from the left edge of the component to the anchor target's left edge.	ILayoutElement
		owner : DisplayObjectContainer The owner of this IVisualElement object.	IVisualElement
		parent : DisplayObjectContainer [sola lettura] The parent container or component for this component.	IVisualElement
		percentHeight : Number Specifies the height of a component as a percentage of its parent's size.	ILayoutElement
		percentWidth : Number Specifies the width of a component as a percentage of its parent's size.	ILayoutElement
		postLayoutTransformOffsets : mx.geom:TransformOffsets Defines a set of adjustments that can be applied to the object's transform in a way that is invisible to its parent's layout.	IVisualElement
		right : Object The horizontal distance in pixels from the right edge of the component to the anchor target's right edge.	ILayoutElement
		selected : Boolean Contains true if the item renderer can show itself as selected.	IItemRenderer
		showsCaret : Boolean Contains true if the item renderer can show itself as focused.	IItemRenderer
		top : Object The vertical distance in pixels from the top edge of the component to the anchor target's top edge.	ILayoutElement
		verticalCenter : Object The vertical distance in pixels from the center of the component to the center of the anchor target's content area.	ILayoutElement
		visible : Boolean Controls the visibility of this visual element.	IVisualElement
		width : Number Indica la larghezza dell'oggetto di visualizzazione espressa in pixel.	IVisualElement
		x : Number Indica la coordinata x dell'istanza DisplayObject relativa alle coordinate locali del DisplayObjectContainer principale.	IVisualElement
		y : Number Indica la coordinata y dell'istanza DisplayObject relativa alle coordinate locali del DisplayObjectContainer principale.	IVisualElement

Metodi pubblici

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	Metodo		Definito da
		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.	IEventDispatcher
		dispatchEvent(event:Event):Boolean Invia un evento nel flusso di eventi.	IEventDispatcher
		getBoundsXAtSize(width:Number, height:Number, postLayoutTransform:Boolean = true):Number Returns the x coordinate of the element's bounds at the specified element size.	ILayoutElement
		getBoundsYAtSize(width:Number, height:Number, postLayoutTransform:Boolean = true):Number Returns the y coordinate of the element's bounds at the specified element size.	ILayoutElement
		getLayoutBoundsHeight(postLayoutTransform:Boolean = true):Number Returns the element's layout height.	ILayoutElement
		getLayoutBoundsWidth(postLayoutTransform:Boolean = true):Number Returns the element's layout width.	ILayoutElement
		getLayoutBoundsX(postLayoutTransform:Boolean = true):Number Returns the x coordinate that the element uses to draw on screen.	ILayoutElement
		getLayoutBoundsY(postLayoutTransform:Boolean = true):Number Returns the y coordinate that the element uses to draw on screen.	ILayoutElement
		getLayoutMatrix():Matrix Returns the transform matrix that is used to calculate the component's layout relative to its siblings.	ILayoutElement
		getLayoutMatrix3D():Matrix3D Returns the layout transform Matrix3D for this element.	ILayoutElement
		getMaxBoundsHeight(postLayoutTransform:Boolean = true):Number Returns the element's maximum height.	ILayoutElement
		getMaxBoundsWidth(postLayoutTransform:Boolean = true):Number Returns the element's maximum width.	ILayoutElement
		getMinBoundsHeight(postLayoutTransform:Boolean = true):Number Returns the element's minimum height.	ILayoutElement
		getMinBoundsWidth(postLayoutTransform:Boolean = true):Number Returns the element's minimum width.	ILayoutElement
		getPreferredBoundsHeight(postLayoutTransform:Boolean = true):Number Returns the element's preferred height.	ILayoutElement
		getPreferredBoundsWidth(postLayoutTransform:Boolean = true):Number Returns the element's preferred width.	ILayoutElement
		hasEventListener(type:String):Boolean Verifica se per l'oggetto EventDispatcher sono presenti listener registrati per un tipo specifico di evento.	IEventDispatcher
		invalidateLayoutDirection():void An element must call this method when its layoutDirection changes or when its parent's layoutDirection changes.	ILayoutDirectionElement
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Rimuove un listener dall'oggetto EventDispatcher.	IEventDispatcher
		setLayoutBoundsPosition(x:Number, y:Number, postLayoutTransform:Boolean = true):void Sets the coordinates that the element uses to draw on screen.	ILayoutElement
		setLayoutBoundsSize(width:Number, height:Number, postLayoutTransform:Boolean = true):void Sets the layout size of the element.	ILayoutElement
		setLayoutMatrix(value:Matrix, invalidateLayout:Boolean):void Sets the transform Matrix that is used to calculate the component's layout size and position relative to its siblings.	ILayoutElement
		setLayoutMatrix3D(value:Matrix3D, invalidateLayout:Boolean):void Sets the transform Matrix3D that is used to calculate the component's layout size and position relative to its siblings.	ILayoutElement
		transformAround(transformCenter:Vector3D, scale:Vector3D = null, rotation:Vector3D = null, translation:Vector3D = null, postLayoutScale:Vector3D = null, postLayoutRotation:Vector3D = null, postLayoutTranslation:Vector3D = null, invalidateLayout:Boolean = true):void A utility method to update the rotation, scale, and translation of the transform while keeping a particular point, specified in the component's own coordinate space, fixed in the parent's coordinate space.	ILayoutElement
		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.	IEventDispatcher

Descrizione delle proprietà

dragging

proprietà

dragging:Boolean

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 4

Versioni runtime:

Flash Player 10, AIR 1.5

Contains true if the item renderer is being dragged.

Implementazione
public function get dragging():Boolean
public function set dragging(value:Boolean):void

itemIndex

proprietà

itemIndex:int

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 4

Versioni runtime:

Flash Player 10, AIR 1.5

The index of the item in the data provider of the host component of the item renderer.

Implementazione
public function get itemIndex():int
public function set itemIndex(value:int):void

label

proprietà

label:String

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 4

Versioni runtime:

Flash Player 10, AIR 1.5

The String to display in the item renderer.

The host component of the item renderer can use the itemToLabel() method to convert the data item to a String for display by the item renderer.

For controls like List and ButtonBar, you can use the labelField or labelFunction properties to specify the field of the data item that contains the String. Otherwise the host component uses the toString() method to convert the data item to a String.

Implementazione
public function get label():String
public function set label(value:String):void

selected

proprietà

selected:Boolean

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 4

Versioni runtime:

Flash Player 10, AIR 1.5

Contains true if the item renderer can show itself as selected.

Implementazione
public function get selected():Boolean
public function set selected(value:Boolean):void

showsCaret

proprietà

showsCaret:Boolean

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 4

Versioni runtime:

Flash Player 10, AIR 1.5

Contains true if the item renderer can show itself as focused.

Implementazione
public function get showsCaret():Boolean
public function set showsCaret(value:Boolean):void

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IItemRenderer - AS3 Flex

Classi x

dragging

itemIndex

label

selected

showsCaret