mx.core.IUIComponent - Adobe® Flex® 4 Language Reference (Flex 4)

Package	mx.core
Interface	public interface IUIComponent extends IFlexDisplayObject , IBitmapDrawable , IEventDispatcher
Implementors	PostScaleAdapter, UIComponent

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The IUIComponent interface defines the basic set of APIs that you must implement to create a child of a Flex container or list.

Public Properties

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	Property		Defined By
		accessibilityProperties : AccessibilityProperties The current accessibility options for this display object.	IFlexDisplayObject
		alpha : Number Indicates the alpha transparency value of the object specified.	IFlexDisplayObject
		baselinePosition : Number [read-only] The y-coordinate of the baseline of the first line of text of the component.	IUIComponent
		blendMode : String A value from the BlendMode class that specifies which blend mode to use.	IFlexDisplayObject
		cacheAsBitmap : Boolean If set to true, Flash Player or Adobe AIR caches an internal bitmap representation of the display object.	IFlexDisplayObject
		document : Object A reference to the document object associated with this component.	IUIComponent
		enabled : Boolean Whether the component can accept user interaction.	IUIComponent
		explicitHeight : Number The explicitly specified height for the component, in pixels, as the component's coordinates.	IUIComponent
		explicitMaxHeight : Number [read-only] Number that specifies the maximum height of the component, in pixels, as the component's coordinates.	IUIComponent
		explicitMaxWidth : Number [read-only] Number that specifies the maximum width of the component, in pixels, as the component's coordinates.	IUIComponent
		explicitMinHeight : Number [read-only] Number that specifies the minimum height of the component, in pixels, as the component's coordinates.	IUIComponent
		explicitMinWidth : Number [read-only] Number that specifies the minimum width of the component, in pixels, as the component's coordinates.	IUIComponent
		explicitWidth : Number The explicitly specified width for the component, in pixels, as the component's coordinates.	IUIComponent
		filters : Array An indexed array that contains each filter object currently associated with the display object.	IFlexDisplayObject
		focusPane : Sprite A single Sprite object that is shared among components and used as an overlay for drawing the focus indicator.	IUIComponent
		height : Number Indicates the height of the display object, in pixels.	IFlexDisplayObject
		includeInLayout : Boolean Specifies whether this component is included in the layout of the parent container.	IUIComponent
		isPopUp : Boolean Set to true by the PopUpManager to indicate that component has been popped up.	IUIComponent
		loaderInfo : LoaderInfo [read-only] Returns a LoaderInfo object containing information about loading the file to which this display object belongs.	IFlexDisplayObject
		mask : DisplayObject The calling display object is masked by the specified mask object.	IFlexDisplayObject
		maxHeight : Number [read-only] Number that specifies the maximum height of the component, in pixels, as the component's coordinates.	IUIComponent
		maxWidth : Number [read-only] Number that specifies the maximum width of the component, in pixels, as the component's coordinates.	IUIComponent
		measuredHeight : Number [read-only] The measured height of this object.	IFlexDisplayObject
		measuredMinHeight : Number The default minimum height of the component, in pixels.	IUIComponent
		measuredMinWidth : Number The default minimum width of the component, in pixels.	IUIComponent
		measuredWidth : Number [read-only] The measured width of this object.	IFlexDisplayObject
		minHeight : Number [read-only] Number that specifies the minimum height of the component, in pixels, as the component's coordinates.	IUIComponent
		minWidth : Number [read-only] Number that specifies the minimum width of the component, in pixels, as the component's coordinates.	IUIComponent
		mouseX : Number [read-only] Indicates the x coordinate of the mouse position, in pixels.	IFlexDisplayObject
		mouseY : Number [read-only] Indicates the y coordinate of the mouse position, in pixels.	IFlexDisplayObject
		name : String Indicates the instance name of the DisplayObject.	IFlexDisplayObject
		opaqueBackground : Object Specifies whether the display object is opaque with a certain background color.	IFlexDisplayObject
		owner : DisplayObjectContainer The owner of this IVisualElement object.	IUIComponent
		parent : DisplayObjectContainer [read-only] Indicates the DisplayObjectContainer object that contains this display object.	IFlexDisplayObject
		percentHeight : Number Number that specifies the height of a component as a percentage of its parent's size.	IUIComponent
		percentWidth : Number Number that specifies the width of a component as a percentage of its parent's size.	IUIComponent
		root : DisplayObject [read-only] For a display object in a loaded SWF file, the root property is the top-most display object in the portion of the display list's tree structure represented by that SWF file.	IFlexDisplayObject
		rotation : Number Indicates the rotation of the DisplayObject instance, in degrees, from its original orientation.	IFlexDisplayObject
		scale9Grid : Rectangle The current scaling grid that is in effect.	IFlexDisplayObject
		scaleX : Number Indicates the horizontal scale (percentage) of the object as applied from the registration point.	IFlexDisplayObject
		scaleY : Number Indicates the vertical scale (percentage) of an object as applied from the registration point of the object.	IFlexDisplayObject
		scrollRect : Rectangle The scroll rectangle bounds of the display object.	IFlexDisplayObject
		stage : Stage [read-only] The Stage of the display object.	IFlexDisplayObject
		systemManager : ISystemManager A reference to the SystemManager object for this component.	IUIComponent
		transform : flash.geom:Transform An object with properties pertaining to a display object's matrix, color transform, and pixel bounds.	IFlexDisplayObject
		tweeningProperties : Array Used by EffectManager.	IUIComponent
		visible : Boolean Whether or not the display object is visible.	IFlexDisplayObject
		width : Number Indicates the width of the display object, in pixels.	IFlexDisplayObject
		x : Number Indicates the x coordinate of the DisplayObject instance relative to the local coordinates of the parent DisplayObjectContainer.	IFlexDisplayObject
		y : Number Indicates the y coordinate of the DisplayObject instance relative to the local coordinates of the parent DisplayObjectContainer.	IFlexDisplayObject

Public Methods

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	Method		Defined By
		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.	IEventDispatcher
		dispatchEvent(event:Event):Boolean Dispatches an event into the event flow.	IEventDispatcher
		getBounds(targetCoordinateSpace:DisplayObject):Rectangle Returns a rectangle that defines the area of the display object relative to the coordinate system of the targetCoordinateSpace object.	IFlexDisplayObject
		getExplicitOrMeasuredHeight():Number A convenience method for determining whether to use the explicit or measured height	IUIComponent
		getExplicitOrMeasuredWidth():Number A convenience method for determining whether to use the explicit or measured width	IUIComponent
		getRect(targetCoordinateSpace:DisplayObject):Rectangle Returns a rectangle that defines the boundary of the display object, based on the coordinate system defined by the targetCoordinateSpace parameter, excluding any strokes on shapes.	IFlexDisplayObject
		globalToLocal(point:Point):Point Converts the point object from the Stage (global) coordinates to the display object's (local) coordinates.	IFlexDisplayObject
		hasEventListener(type:String):Boolean Checks whether the EventDispatcher object has any listeners registered for a specific type of event.	IEventDispatcher
		hitTestObject(obj:DisplayObject):Boolean Evaluates the bounding box of the display object to see if it overlaps or intersects with the bounding box of the obj display object.	IFlexDisplayObject
		hitTestPoint(x:Number, y:Number, shapeFlag:Boolean = false):Boolean Evaluates the display object to see if it overlaps or intersects with the point specified by the x and y parameters.	IFlexDisplayObject
		initialize():void Initialize the object.	IUIComponent
		localToGlobal(point:Point):Point Converts the point object from the display object's (local) coordinates to the Stage (global) coordinates.	IFlexDisplayObject
		move(x:Number, y:Number):void Moves this object to the specified x and y coordinates.	IFlexDisplayObject
		owns(displayObject:DisplayObject):Boolean Returns true if the chain of owner properties points from child to this UIComponent.	IUIComponent
		parentChanged(p:DisplayObjectContainer):void Called by Flex when a UIComponent object is added to or removed from a parent.	IUIComponent
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Removes a listener from the EventDispatcher object.	IEventDispatcher
		setActualSize(newWidth:Number, newHeight:Number):void Sets the actual size of this object.	IFlexDisplayObject
		setVisible(value:Boolean, noEvent:Boolean = false):void Called when the visible property changes.	IUIComponent
		willTrigger(type:String):Boolean Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.	IEventDispatcher

Property Detail

baselinePosition

property

baselinePosition:Number [read-only]

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The y-coordinate of the baseline of the first line of text of the component.

This property is used to implement the baseline constraint style. It is also used to align the label of a FormItem with the controls in the FormItem.

Implementation
public function get baselinePosition():Number

document

property

document:Object

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

A reference to the document object associated with this component. A document object is an Object at the top of the hierarchy of a Flex application, MXML component, or ActionScript component.

Implementation
public function get document():Object
public function set document(value:Object):void

enabled

property

enabled:Boolean

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Whether the component can accept user interaction. After setting the enabled property to false, some components still respond to mouse interactions such as mouseOver. As a result, to fully disable UIComponents, you should also set the value of the mouseEnabled property to false. If you set the enabled property to false for a container, Flex dims the color of the container and of all of its children, and blocks user input to the container and to all of its children.

Implementation
public function get enabled():Boolean
public function set enabled(value:Boolean):void

explicitHeight

property

explicitHeight:Number

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The explicitly specified height for the component, in pixels, as the component's coordinates. If no height is explicitly specified, the value is NaN.

Implementation
public function get explicitHeight():Number
public function set explicitHeight(value:Number):void

See also

mx.core.UIComponent.explicitHeight

explicitMaxHeight

property

explicitMaxHeight:Number [read-only]

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Number that specifies the maximum height of the component, in pixels, as the component's coordinates.

Implementation
public function get explicitMaxHeight():Number

See also

mx.core.UIComponent.explicitMaxHeight

explicitMaxWidth

property

explicitMaxWidth:Number [read-only]

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Number that specifies the maximum width of the component, in pixels, as the component's coordinates.

Implementation
public function get explicitMaxWidth():Number

See also

mx.core.UIComponent.explicitMaxWidth

explicitMinHeight

property

explicitMinHeight:Number [read-only]

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Number that specifies the minimum height of the component, in pixels, as the component's coordinates.

Implementation
public function get explicitMinHeight():Number

See also

mx.core.UIComponent.explicitMinHeight

explicitMinWidth

property

explicitMinWidth:Number [read-only]

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Number that specifies the minimum width of the component, in pixels, as the component's coordinates.

Implementation
public function get explicitMinWidth():Number

See also

mx.core.UIComponent.explicitMinWidth

explicitWidth

property

explicitWidth:Number

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The explicitly specified width for the component, in pixels, as the component's coordinates. If no width is explicitly specified, the value is NaN.

Implementation
public function get explicitWidth():Number
public function set explicitWidth(value:Number):void

See also

mx.core.UIComponent.explicitWidth

focusPane

property

focusPane:Sprite

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

A single Sprite object that is shared among components and used as an overlay for drawing the focus indicator. Components share this object if their parent is a focused component, not if the component implements the IFocusManagerComponent interface.

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

See also

mx.core.UIComponent.focusPane

includeInLayout

property

includeInLayout:Boolean

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Specifies whether this component is included in the layout of the parent container. If true, the object is included in its parent container's layout and is sized and positioned by its parent container as per its layout rules. If false, the object size and position are not affected by its parent container's layout.

Implementation
public function get includeInLayout():Boolean
public function set includeInLayout(value:Boolean):void

isPopUp

property

isPopUp:Boolean

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Set to true by the PopUpManager to indicate that component has been popped up.

Implementation
public function get isPopUp():Boolean
public function set isPopUp(value:Boolean):void

maxHeight

property

maxHeight:Number [read-only]

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Number that specifies the maximum height of the component, in pixels, as the component's coordinates.

Implementation
public function get maxHeight():Number

See also

mx.core.UIComponent.maxHeight

maxWidth

property

maxWidth:Number [read-only]

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Number that specifies the maximum width of the component, in pixels, as the component's coordinates.

Implementation
public function get maxWidth():Number

See also

mx.core.UIComponent.maxWidth

measuredMinHeight

property

measuredMinHeight:Number

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The default minimum height of the component, in pixels. This value is set by the measure() method.

Implementation
public function get measuredMinHeight():Number
public function set measuredMinHeight(value:Number):void

measuredMinWidth

property

measuredMinWidth:Number

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The default minimum width of the component, in pixels. This value is set by the measure() method.

Implementation
public function get measuredMinWidth():Number
public function set measuredMinWidth(value:Number):void

minHeight

property

minHeight:Number [read-only]

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Number that specifies the minimum height of the component, in pixels, as the component's coordinates.

Implementation
public function get minHeight():Number

See also

mx.core.UIComponent.minHeight

minWidth

property

minWidth:Number [read-only]

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Number that specifies the minimum width of the component, in pixels, as the component's coordinates.

Implementation
public function get minWidth():Number

See also

mx.core.UIComponent.minWidth

owner

property

owner:DisplayObjectContainer

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The owner of this IVisualElement object. By default, it is the parent of this IVisualElement object. However, if this IVisualElement object is a child component that is popped up by its parent, such as the drop-down list of a ComboBox control, the owner is the component that popped up this IVisualElement object.

This property is not managed by Flex, but by each component. Therefore, if you use the PopUpManger.createPopUp() or PopUpManger.addPopUp() method to pop up a child component, you should set the owner property of the child component to the component that popped it up.

The default value is the value of the parent property.

Implementation
public function get owner():DisplayObjectContainer
public function set owner(value:DisplayObjectContainer):void

percentHeight

property

percentHeight:Number

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Number that specifies the height of a component as a percentage of its parent's size. Allowed values are 0 to 100.

Implementation
public function get percentHeight():Number
public function set percentHeight(value:Number):void

percentWidth

property

percentWidth:Number

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Number that specifies the width of a component as a percentage of its parent's size. Allowed values are 0 to 100.

Implementation
public function get percentWidth():Number
public function set percentWidth(value:Number):void

systemManager

property

systemManager:ISystemManager

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

A reference to the SystemManager object for this component.

Implementation
public function get systemManager():ISystemManager
public function set systemManager(value:ISystemManager):void

tweeningProperties

property

tweeningProperties:Array

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Used by EffectManager. Returns non-null if a component is not using the EffectManager to execute a Tween.

Implementation
public function get tweeningProperties():Array
public function set tweeningProperties(value:Array):void

Method Detail

getExplicitOrMeasuredHeight

()

method

public function getExplicitOrMeasuredHeight():Number

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

A convenience method for determining whether to use the explicit or measured height

Returns

Number — A Number which is explicitHeight if defined or measuredHeight if not.

getExplicitOrMeasuredWidth

()

method

public function getExplicitOrMeasuredWidth():Number

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

A convenience method for determining whether to use the explicit or measured width

Returns

Number — A Number which is explicitWidth if defined or measuredWidth if not.

initialize

()

method

public function initialize():void

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Initialize the object.

See also

mx.core.UIComponent.initialize()

owns

()

method

public function owns(displayObject:DisplayObject):Boolean

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Returns true if the chain of owner properties points from child to this UIComponent.

Parameters

displayObject:DisplayObject — A UIComponent.

Returns

Boolean — true if the child is parented or owned by this UIComponent.

parentChanged

()

method

public function parentChanged(p:DisplayObjectContainer):void

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Called by Flex when a UIComponent object is added to or removed from a parent. Developers typically never need to call this method.

Parameters

p:DisplayObjectContainer — The parent of this UIComponent object.

setVisible

()

method

public function setVisible(value:Boolean, noEvent:Boolean = false):void

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Called when the visible property changes. Set the visible property to show or hide a component instead of calling this method directly.

Parameters

	`value:Boolean` — The new value of the `visible` property. Specify `true` to show the component, and `false` to hide it.

	`noEvent:Boolean` (default = `false`) — If `true`, do not dispatch an event. If `false`, dispatch a `show` event when the component becomes visible, and a `hide` event when the component becomes invisible.