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ListBase

Package | mx.controls.listClasses
Class | public class ListBase
Inheritance | ListBase ScrollControlBase UIComponent FlexSprite flash.display.Sprite
Implements | IDataRenderer, IFocusManagerComponent, IListItemRenderer, IDropInListItemRenderer, IEffectTargetHost
Subclasses | DataGridBase, List, TileBase

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The ListBase class is the base class for controls that represent lists of items that can have one or more selected and can scroll through the items. Items are supplied using the `dataProvider` property and displayed via item renderers.

In a model/view architecture, the ListBase-derived class represents the view, and the dataProvider object represents the model.

MXML Syntax Show MXML Syntax
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The ListBase class inherits all of the tag properties of its superclasses, and adds the following tag properties:

      <mx:tagname
        Properties
        allowDragSelection="false|true"
        allowMultipleSelection="false|true"
        columnCount="4"
        columnWidth="NaN"
        dataProvider="null"
        dataTipField="label"
        dataTipFunction="null"
        dragEnabled="false|true"
        dragMoveEnabled="false|true"
        dropEnabled="false|true"
        iconField="null"
        iconFunction="null"
        itemRenderer="null"
        labelField="label"
        labelFunction="null"
        menuSelectionMode="false|true"
        offscreenExtraRowsOrColumns="0"
        rowCount="-1"
        rowHeight="NaN"
        selectable="true|false"
        selectedIndex="-1"
        selectedIndices="null"
        selectedItem="null"
        selectedItems="null"
        showDataTips="false|true"
        variableRowHeight="false|true"
        wordWrap="false|true"

        Styles
        alternatingItemColors="undefined"
        itemsChangeEffect="undefined"
        dropIndicatorSkin="ListDropIndicator"
        focusAlpha="0.5"
        focusRoundedCorners="tl tr bl br"
        paddingBottom="2"
        paddingLeft="2"
        paddingRight="0"
        paddingTop="2"
        rollOverColor="0xEEFEE6"
        selectionColor="0x7FCEFF"
        selectionDisabledColor="0xDDDDDD"
        selectionDuration="250"
        selectionEasingFunction="undefined"
        textRollOverColor="0x2B333C"
        textSelectedColor="0x2B333C"
        useRollOver="true|false"
        verticalAlign="top|middle|bottom"

        Events
        change="No default"
        dataChange="No default"
        itemClick="No default"
        itemDoubleClick="No default"
        itemRollOut="No default"
        itemRollOver="No default"
       />

See also

mx.collections.ICollectionView

Public Properties
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| Property | Defined By
--- | --- | ---
|  | accessibilityDescription : String A convenience accessor for the description property in this UIComponent's accessibilityProperties object. | UIComponent
|  | accessibilityEnabled : Boolean A convenience accessor for the silent property in this UIComponent's accessibilityProperties object. | UIComponent
|  | accessibilityName : String A convenience accessor for the name property in this UIComponent's accessibilityProperties object. | UIComponent
|  | accessibilityShortcut : String A convenience accessor for the shortcut property in this UIComponent's accessibilityProperties object. | UIComponent
|  | activeEffects : Array [read-only] The list of effects that are currently playing on the component, as an Array of EffectInstance instances. | UIComponent
|  | allowDragSelection : Boolean = false A flag that indicates whether drag-selection is enabled. | ListBase
|  | allowMultipleSelection : Boolean A flag that indicates whether you can allow more than one item to be selected at the same time. | ListBase
|  | automationDelegate : Object The delegate object that handles the automation-related functionality. | UIComponent
|  | automationEnabled : Boolean [read-only] True if this component is enabled for automation, false otherwise. | UIComponent
|  | automationName : String Name that can be used as an identifier for this object. | UIComponent
|  | automationOwner : DisplayObjectContainer [read-only] The owner of this component for automation purposes. | UIComponent
|  | automationParent : DisplayObjectContainer [read-only] The parent of this component for automation purposes. | UIComponent
|  | automationTabularData : Object [read-only] An implementation of the IAutomationTabularData interface, which can be used to retrieve the data. | UIComponent
|  | automationValue : Array [read-only] This value generally corresponds to the rendered appearance of the object and should be usable for correlating the identifier with the object as it appears visually within the application. | UIComponent
|  | automationVisible : Boolean [read-only] True if this component is visible for automation, false otherwise. | UIComponent
|  | baseline : Object For components, this layout constraint property is a facade on top of the similarly-named style. | UIComponent
|  | baselinePosition : Number [read-only] The y-coordinate of the baseline of the first line of text of the component. | UIComponent
|  | borderMetrics : EdgeMetrics [read-only] Returns an EdgeMetrics object that has four properties: left, top, right, and bottom. | ScrollControlBase
|  | bottom : Object For components, this layout constraint property is a facade on top of the similarly-named style. | UIComponent
|  | cacheHeuristic : Boolean [write-only] Used by Flex to suggest bitmap caching for the object. | UIComponent
|  | cachePolicy : String Specifies the bitmap caching policy for this object. | UIComponent
|  | className : String [read-only] The name of this instance's class, such as "Button". | UIComponent
|  | columnCount : int The number of columns to be displayed in a TileList control or items in a HorizontalList control. | ListBase
|  | columnWidth : Number The width of the control's columns. | ListBase
|  | contentMouseX : Number [read-only] Returns the x position of the mouse, in the content coordinate system. | UIComponent
|  | contentMouseY : Number [read-only] Returns the y position of the mouse, in the content coordinate system. | UIComponent
|  | currentState : String The current view state of the component. | UIComponent
|  | cursorManager : ICursorManager [read-only] Gets the CursorManager that controls the cursor for this component and its peers. | UIComponent
|  | data : Object The item in the data provider this component should render when this component is used as an item renderer or item editor. | ListBase
|  | dataProvider : Object Set of data to be viewed. | ListBase
|  | dataTipField : String Name of the field in the data provider items to display as the data tip. | ListBase
|  | dataTipFunction : Function User-supplied function to run on each item to determine its dataTip. | ListBase
|  | depth : Number Determines the order in which items inside of containers are rendered. | UIComponent
|  | descriptor : UIComponentDescriptor Reference to the UIComponentDescriptor, if any, that was used by the createComponentFromDescriptor() method to create this UIComponent instance. | UIComponent
|  | designLayer : DesignLayer Specifies the optional DesignLayer instance associated with this visual element. | UIComponent
|  | document : Object A reference to the document object associated with this UIComponent. | UIComponent
|  | doubleClickEnabled : Boolean [override] Specifies whether the UIComponent object receives doubleClick events. | UIComponent
|  | dragEnabled : Boolean A flag that indicates whether you can drag items out of this control and drop them on other controls. | ListBase
|  | dragMoveEnabled : Boolean A flag that indicates whether items can be moved instead of just copied from the control as part of a drag-and-drop operation. | ListBase
|  | dropEnabled : Boolean A flag that indicates whether dragged items can be dropped onto the control. | ListBase
|  | enabled : Boolean Whether the component can accept user interaction. | UIComponent
|  | errorString : String The text that displayed by a component's error tip when a component is monitored by a Validator and validation fails. | UIComponent
|  | explicitHeight : Number Number that specifies the explicit height of the component, in pixels, in the component's coordinates. | UIComponent
|  | explicitMaxHeight : Number The maximum recommended height of the component to be considered by the parent during layout. | UIComponent
|  | explicitMaxWidth : Number The maximum recommended width of the component to be considered by the parent during layout. | UIComponent
|  | explicitMinHeight : Number The minimum recommended height of the component to be considered by the parent during layout. | UIComponent
|  | explicitMinWidth : Number The minimum recommended width of the component to be considered by the parent during layout. | UIComponent
|  | explicitWidth : Number Number that specifies the explicit width of the component, in pixels, in the component's coordinates. | UIComponent
|  | flexContextMenu : IFlexContextMenu The context menu for this UIComponent. | UIComponent
|  | focusEnabled : Boolean Indicates whether the component can receive focus when tabbed to. | UIComponent
|  | focusManager : IFocusManager Gets the FocusManager that controls focus for this component and its peers. | UIComponent
|  | focusPane : Sprite The focus pane associated with this object. | UIComponent
|  | hasFocusableChildren : Boolean A flag that indicates whether child objects can receive focus. | UIComponent
|  | hasLayoutMatrix3D : Boolean [read-only] Contains true if the element has 3D Matrix. | UIComponent
|  | height : Number [override] Number that specifies the height of the component, in pixels, in the parent's coordinates. | UIComponent
|  | horizontalCenter : Object For components, this layout constraint property is a facade on top of the similarly-named style. | UIComponent
|  | horizontalScrollPolicy : String A property that indicates whether the horizontal scroll bar is always on, always off, or automatically changes based on the parameters passed to the setScrollBarProperties() method. | ScrollControlBase
|  | horizontalScrollPosition : Number The offset into the content from the left edge. | ScrollControlBase
|  | iconField : String The name of the field in the data provider object that determines what to display as the icon. | ListBase
|  | iconFunction : Function A user-supplied function to run on each item to determine its icon. | ListBase
|  | id : String ID of the component. | UIComponent
|  | includeInLayout : Boolean Specifies whether this component is included in the layout of the parent container. | UIComponent
|  | inheritingStyles : Object The beginning of this component's chain of inheriting styles. | UIComponent
|  | initialized : Boolean A flag that determines if an object has been through all three phases of layout: commitment, measurement, and layout (provided that any were required). | UIComponent
|  | instanceIndex : int [read-only] The index of a repeated component. | UIComponent
|  | instanceIndices : Array An Array containing the indices required to reference this UIComponent object from its parent document. | UIComponent
|  | is3D : Boolean [read-only] Contains true when the element is in 3D. | UIComponent
|  | isDocument : Boolean [read-only] Contains true if this UIComponent instance is a document object. | UIComponent
|  | isPopUp : Boolean Set to true by the PopUpManager to indicate that component has been popped up. | UIComponent
|  | itemRenderer : IFactory The custom item renderer for the control. | ListBase
|  | labelField : String The name of the field in the data provider items to display as the label. | ListBase
|  | labelFunction : Function A user-supplied function to run on each item to determine its label. | ListBase
|  | layoutMatrix3D : Matrix3D [write-only] The transform matrix that is used to calculate a component's layout relative to its siblings. | UIComponent
|  | left : Object For components, this layout constraint property is a facade on top of the similarly-named style. | UIComponent
|  | listData : BaseListData When a component is used as a drop-in item renderer or drop-in item editor, Flex initializes the listData property of the component with the additional data from the list control. | ListBase
|  | liveScrolling : Boolean = true A flag that indicates whether scrolling is live as the scrollbar thumb is moved or the view is not updated until the thumb is released. | ScrollControlBase
|  | maintainProjectionCenter : Boolean When true, the component keeps its projection matrix centered on the middle of its bounding box. | UIComponent
|  | maxHeight : Number The maximum recommended height of the component to be considered by the parent during layout. | UIComponent
|  | maxHorizontalScrollPosition : Number The maximum value for the horizontalScrollPosition property. | ScrollControlBase
|  | maxVerticalScrollPosition : Number The maximum value for the verticalScrollPosition property. | ScrollControlBase
|  | maxWidth : Number The maximum recommended width of the component to be considered by the parent during layout. | UIComponent
|  | measuredHeight : Number The default height of the component, in pixels. | UIComponent
|  | measuredMinHeight : Number The default minimum height of the component, in pixels. | UIComponent
|  | measuredMinWidth : Number The default minimum width of the component, in pixels. | UIComponent
|  | measuredWidth : Number The default width of the component, in pixels. | UIComponent
|  | menuSelectionMode : Boolean = false A flag that indicates whether menu-style selection should be used. | ListBase
|  | minHeight : Number The minimum recommended height of the component to be considered by the parent during layout. | UIComponent
|  | minWidth : Number The minimum recommended width of the component to be considered by the parent during layout. | UIComponent
|  | moduleFactory : IFlexModuleFactory A module factory is used as context for using embedded fonts and for finding the style manager that controls the styles for this component. | UIComponent
|  | mouseFocusEnabled : Boolean Whether you can receive focus when clicked on. | UIComponent
|  | MXMLDescriptor : Array [read-only] | UIComponent
|  | MXMLProperties : Array [read-only] | UIComponent
|  | nestLevel : int Depth of this object in the containment hierarchy. | UIComponent
|  | nonInheritingStyles : Object The beginning of this component's chain of non-inheriting styles. | UIComponent
|  | nullItemRenderer : IFactory The custom item renderer for the control. | ListBase
|  | numAutomationChildren : int [read-only] The number of automation children this container has. | UIComponent
|  | offscreenExtraRowsOrColumns : int The target number of extra rows or columns of item renderers to be used in the layout of the control. | ListBase
|  | owner : DisplayObjectContainer The owner of this IVisualElement object. | UIComponent
|  | parent : DisplayObjectContainer [override] [read-only] The parent container or component for this component. | UIComponent
|  | parentApplication : Object [read-only] A reference to the Application object that contains this UIComponent instance. | UIComponent
|  | parentDocument : Object [read-only] A reference to the parent document object for this UIComponent. | UIComponent
|  | percentHeight : Number Specifies the height of a component as a percentage of its parent's size. | UIComponent
|  | percentWidth : Number Specifies the width of a component as a percentage of its parent's size. | UIComponent
|  | postLayoutTransformOffsets : 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. | UIComponent
|  | processedDescriptors : Boolean Set to true after immediate or deferred child creation, depending on which one happens. | UIComponent
|  | repeater : IRepeater [read-only] A reference to the Repeater object in the parent document that produced this UIComponent. | UIComponent
|  | repeaterIndex : int [read-only] The index of the item in the data provider of the Repeater that produced this UIComponent. | UIComponent
|  | repeaterIndices : Array An Array containing the indices of the items in the data provider of the Repeaters in the parent document that produced this UIComponent. | UIComponent
|  | repeaters : Array An Array containing references to the Repeater objects in the parent document that produced this UIComponent. | UIComponent
|  | right : Object For components, this layout constraint property is a facade on top of the similarly-named style. | UIComponent
|  | rotation : Number [override] | UIComponent
|  | rotationX : Number [override] Indicates the x-axis rotation of the DisplayObject instance, in degrees, from its original orientation relative to the 3D parent container. | UIComponent
|  | rotationY : Number [override] Indicates the y-axis rotation of the DisplayObject instance, in degrees, from its original orientation relative to the 3D parent container. | UIComponent
|  | rotationZ : Number [override] | UIComponent
|  | rowCount : int Number of rows to be displayed. | ListBase
|  | rowHeight : Number The height of the rows in pixels. | ListBase
|  | scaleX : Number [override] Number that specifies the horizontal scaling factor. | UIComponent
|  | scaleY : Number [override] Number that specifies the vertical scaling factor. | UIComponent
|  | scaleZ : Number [override] Number that specifies the scaling factor along the z axis. | UIComponent
|  | screen : Rectangle [read-only] Returns an object that contains the size and position of the base drawing surface for this object. | UIComponent
|  | scrollTipFunction : Function A function that computes the string to be displayed as the ScrollTip. | ScrollControlBase
|  | selectable : Boolean A flag that indicates whether the list shows selected items as selected. | ListBase
|  | selectedIndex : int The index in the data provider of the selected item. | ListBase
|  | selectedIndices : Array An array of indices in the data provider of the selected items. | ListBase
|  | selectedItem : Object A reference to the selected item in the data provider. | ListBase
|  | selectedItems : Array An array of references to the selected items in the data provider. | ListBase
|  | selectedItemsCompareFunction : Function A function used to compare items in the selectedItems property against items in the data provider. | ListBase
|  | showDataTips : Boolean A flag that indicates whether dataTips are displayed for text in the rows. | ListBase
|  | showInAutomationHierarchy : Boolean A flag that determines if an automation object shows in the automation hierarchy. | UIComponent
|  | showScrollTips : Boolean = false A flag that indicates whether a tooltip should appear near the scroll thumb when it is being dragged. | ScrollControlBase
|  | states : Array The view states that are defined for this component. | UIComponent
|  | styleDeclaration : CSSStyleDeclaration Storage for the inline inheriting styles on this object. | UIComponent
|  | styleManager : IStyleManager2 [read-only] Returns the StyleManager instance used by this component. | UIComponent
|  | styleName : Object The class style used by this component. | UIComponent
|  | styleParent : IAdvancedStyleClient A component's parent is used to evaluate descendant selectors. | UIComponent
|  | systemManager : ISystemManager Returns the SystemManager object used by this component. | UIComponent
|  | tabFocusEnabled : Boolean A flag that indicates whether this object can receive focus via the TAB key This is similar to the tabEnabled property used by the Flash Player. This is usually true for components that handle keyboard input, but some components in controlbars have them set to false because they should not steal focus from another component like an editor. | UIComponent
|  | toolTip : String Text to display in the ToolTip. | UIComponent
|  | top : Object For components, this layout constraint property is a facade on top of the similarly-named style. | UIComponent
|  | transform : Transform [override] An object with properties pertaining to a display object's matrix, color transform, and pixel bounds. | UIComponent
|  | transformX : Number Sets the x coordinate for the transform center of the component. | UIComponent
|  | transformY : Number Sets the y coordinate for the transform center of the component. | UIComponent
|  | transformZ : Number Sets the z coordinate for the transform center of the component. | UIComponent
|  | transitions : Array An Array of Transition objects, where each Transition object defines a set of effects to play when a view state change occurs. | UIComponent
|  | tweeningProperties : Array Array of properties that are currently being tweened on this object. | UIComponent
|  | uid : String A unique identifier for the object. | UIComponent
|  | updateCompletePendingFlag : Boolean A flag that determines if an object has been through all three phases of layout validation (provided that any were required). | UIComponent
|  | validationSubField : String Used by a validator to associate a subfield with this component. | UIComponent
|  | value : Object [read-only] The selected item, or the data or label field of the selected item. | ListBase
|  | variableRowHeight : Boolean A flag that indicates whether the individual rows can have different height. | ListBase
|  | verticalCenter : Object For components, this layout constraint property is a facade on top of the similarly-named style. | UIComponent
|  | verticalScrollPolicy : String A property that indicates whether the vertical scroll bar is always on, always off, or automatically changes based on the parameters passed to the setScrollBarProperties() method. | ScrollControlBase
|  | verticalScrollPosition : Number The offset into the content from the top edge. | ScrollControlBase
|  | viewMetrics : EdgeMetrics [read-only] An EdgeMetrics object taking into account the scroll bars, if visible. | ScrollControlBase
|  | visible : Boolean [override] Whether or not the display object is visible. | UIComponent
|  | width : Number [override] Number that specifies the width of the component, in pixels, in the parent's coordinates. | UIComponent
|  | wordWrap : Boolean A flag that indicates whether text in the row should be word wrapped. | ListBase
|  | x : Number [override] Number that specifies the component's horizontal position, in pixels, within its parent container. | UIComponent
|  | y : Number [override] Number that specifies the component's vertical position, in pixels, within its parent container. | UIComponent
|  | z : Number [override] | UIComponent

Protected Properties
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| Property | Defined By
--- | --- | ---
|  | actualCollection : ICollectionView A copy of the value normally stored in collection used while running data changes effects. | ListBase
|  | actualIterator : IViewCursor A copy of the value normally stored in iterator used while running data changes effects. | ListBase
|  | allowItemSizeChangeNotification : Boolean [write-only] If false, renderers cannot invalidate size of List. | ListBase
|  | anchorBookmark : CursorBookmark A bookmark to the item that is the anchor. | ListBase
|  | anchorIndex : int = -1 The offset of the item in the data provider that is the selection anchor point. | ListBase
|  | border : IFlexDisplayObject The border object. | ScrollControlBase
|  | cachedItemsChangeEffect : IEffect = null The effect that plays when changes occur in the data provider for the control, set through the itemsChangeEffect style. | ListBase
|  | caretBookmark : CursorBookmark A bookmark to the item under the caret. | ListBase
|  | caretIndex : int = -1 The offset of the item in the data provider that is the selection caret point. | ListBase
|  | caretIndicator : Sprite The DisplayObject that contains the graphics that indicate which renderer is the caret. | ListBase
|  | caretItemRenderer : IListItemRenderer The renderer for the item under the caret. | ListBase
|  | caretUID : String The UID of the item under the caret. | ListBase
|  | collection : ICollectionView An ICollectionView that represents the data provider. | ListBase
|  | currentCSSState : String [read-only] The state to be used when matching CSS pseudo-selectors. | UIComponent
|  | dataEffectCompleted : Boolean = false A flag that indicates that the a data change effect has just completed. | ListBase
|  | dataItemWrappersByRenderer : Dictionary A dictionary mapping item renderers to the ItemWrappers used to supply their data. | ListBase
|  | defaultColumnCount : int = 4 The default number of columns to display. | ListBase
|  | defaultRowCount : int = 4 The default number of rows to display. | ListBase
|  | dragImage : IUIComponent [read-only] Gets an instance of a class that displays the visuals during a drag and drop operation. | ListBase
|  | dragImageOffsets : Point [read-only] Gets the offset of the drag image for drag and drop. | ListBase
|  | explicitColumnCount : int = -1 The column count requested by explicitly setting the columnCount property. | ListBase
|  | explicitColumnWidth : Number The column width requested by explicitly setting the columnWidth. | ListBase
|  | explicitRowCount : int = -1 The row count requested by explicitly setting rowCount. | ListBase
|  | explicitRowHeight : Number The row height requested by explicitly setting rowHeight. | ListBase
|  | factoryMap : Dictionary A map of item renderers by factory. | ListBase
|  | freeItemRenderers : Array A stack of unused item renderers. | ListBase
|  | freeItemRenderersByFactory : Dictionary A map of free item renderers by factory. | ListBase
|  | hasComplexLayoutMatrix : Boolean [read-only] Returns true if the UIComponent has any non-translation (x,y) transform properties. | UIComponent
|  | highlightIndicator : Sprite The DisplayObject that contains the graphics that indicates which renderer is highlighted. | ListBase
|  | highlightItemRenderer : IListItemRenderer The renderer that is currently rolled over or under the caret. | ListBase
|  | highlightUID : String The UID of the item that is current rolled over or under the caret. | ListBase
|  | horizontalScrollBar : ScrollBar The horizontal scroll bar. | ScrollControlBase
|  | itemsNeedMeasurement : Boolean = true A flag that indicates whether the columnWidth and rowHeight properties need to be calculated. | ListBase
|  | itemsSizeChanged : Boolean = false A flag that indicates that the size of the renderers may have changed. | ListBase
|  | iterator : IViewCursor The main IViewCursor used to fetch items from the data provider and pass the items to the renderers. | ListBase
|  | iteratorValid : Boolean = true A flag that indicates that a page fault as occurred and that the iterator's position is not valid (not positioned at the topmost item being displayed). | ListBase
|  | keySelectionPending : Boolean = false A flag that indicates if keyboard selection was interrupted by a page fault. | ListBase
|  | lastDropIndex : int The most recently calculated index where the drag item should be added to the drop target. | ListBase
|  | lastSeekPending : ListBaseSeekPending The most recent seek that caused a page fault. | ListBase
|  | listContent : ListBaseContentHolder An internal display object that parents all of the item renderers, selection and highlighting indicators and other supporting graphics. | ListBase
|  | listContentStyleFilters : Object [read-only] The set of styles to pass from the ListBase to the listContent. | ListBase
|  | listItems : Array [read-only] An Array of Arrays that contains the itemRenderer instances that render each data provider item. | ListBase
|  | maskShape : Shape The mask. | ScrollControlBase
|  | modifiedCollectionView : ModifiedCollectionView The collection view that temporarily preserves previous data provider state to facilitate running data change effects. | ListBase
|  | offscreenExtraColumns : int = 0 The target number of extra columns of item renderers used in the layout of the control. | ListBase
|  | offscreenExtraColumnsLeft : int = 0 The number of offscreen columns currently to the left of the leftmost visible column. | ListBase
|  | offscreenExtraColumnsRight : int = 0 The number of offscreen columns currently to the right of the right visible column. | ListBase
|  | offscreenExtraRows : int = 0 The target number of extra rows of item renderers to be used in the layout of the control. | ListBase
|  | offscreenExtraRowsBottom : int = 0 The number of offscreen rows currently below the bottom visible item renderer. | ListBase
|  | offscreenExtraRowsOrColumnsChanged : Boolean = false A flag indicating that the number of offscreen rows or columns may have changed. | ListBase
|  | offscreenExtraRowsTop : int = 0 The number of offscreen rows currently above the topmost visible row. | ListBase
|  | rendererChanged : Boolean = false A flag that indicates that the renderer changed. | ListBase
|  | reservedItemRenderers : Object A hash map of currently unused item renderers that may be used again in the near future. | ListBase
|  | resourceManager : IResourceManager [read-only] A reference to the object which manages all of the application's localized resources. | UIComponent
|  | rowInfo : Array [read-only] An array of ListRowInfo objects that cache row heights and other tracking information for the rows in listItems. | ListBase
|  | rowMap : Object A hash map of item renderers to their respective ListRowInfo object. | ListBase
|  | runDataEffectNextUpdate : Boolean = false A flag that indicates if a data effect should be initiated the next time the display is updated. | ListBase
|  | runningDataEffect : Boolean = false A flag indicating if a data change effect is currently running. | ListBase
|  | scrollAreaChanged : Boolean A flag that the scrolling area changed due to the appearance or disappearance of scrollbars. | ScrollControlBase
|  | selectedData : Object A hash table of ListBaseSelectionData objects that track which items are currently selected. | ListBase
|  | selectionIndicators : Object A hash table of selection indicators. | ListBase
|  | selectionLayer : Sprite The layer in listContent where all selection and highlight indicators are drawn. | ListBase
|  | selectionTweens : Object A hash table of selection tweens. | ListBase
|  | showCaret : Boolean A flag that indicates whether to show caret. | ListBase
|  | unconstrainedRenderers : Dictionary A hash map of item renderers that are not subject to the layout algorithms of the list. | ListBase
|  | unscaledHeight : Number [read-only] A convenience method for determining the unscaled height of the component. | UIComponent
|  | unscaledWidth : Number [read-only] A convenience method for determining the unscaled width of the component All of a component's drawing and child layout should be done within a bounding rectangle of this width, which is also passed as an argument to updateDisplayList(). | UIComponent
|  | verticalScrollBar : ScrollBar The vertical scroll bar. | ScrollControlBase
|  | visibleData : Object [read-only] A hash table of data provider item renderers currently in view. | ListBase
|  | wordWrapChanged : Boolean = false A flag that indicates whether the value of the wordWrap property has changed since the last time the display list was updated. | ListBase

Public Methods
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| Method | Defined By
--- | --- | ---
|  | ListBase() Constructor. | ListBase
|  | addDataEffectItem(item:Object):void Adds an item renderer if a data change effect is running. | ListBase
|  | addStyleClient(styleClient:IAdvancedStyleClient):void Adds a non-visual style client to this component instance. | UIComponent
|  | calculateDropIndex(event:DragEvent = null):int Returns the index where the dropped items should be added to the drop target. | ListBase
|  | callLater(method:Function, args:Array = null):void Queues a function to be called later. | UIComponent
|  | clearStyle(styleProp:String):void Deletes a style property from this component instance. | UIComponent
|  | contentToGlobal(point:Point):Point Converts a Point object from content coordinates to global coordinates. | UIComponent
|  | contentToLocal(point:Point):Point Converts a Point object from content to local coordinates. | UIComponent
|  | createAutomationIDPart(child:IAutomationObject):Object Returns a set of properties that identify the child within this container. | UIComponent
|  | createAutomationIDPartWithRequiredProperties(child:IAutomationObject, properties:Array):Object Returns a set of properties as automation IDs that identify the child within this container. | UIComponent
|  | createItemRenderer(data:Object):IListItemRenderer Creates an item renderer given the data object. | ListBase
|  | createReferenceOnParentDocument(parentDocument:IFlexDisplayObject):void Creates an id reference to this IUIComponent object on its parent document object. | UIComponent
|  | deleteReferenceOnParentDocument(parentDocument:IFlexDisplayObject):void Deletes the id reference to this IUIComponent object on its parent document object. | UIComponent
|  | determineTextFormatFromStyles():UITextFormat Returns a UITextFormat object corresponding to the text styles for this UIComponent. | UIComponent
|  | dispatchEvent(event:Event):Boolean [override] Dispatches an event into the event flow. | UIComponent
|  | drawFocus(isFocused:Boolean):void Shows or hides the focus indicator around this component. | UIComponent
|  | drawRoundRect(x:Number, y:Number, w:Number, h:Number, r:Object = null, c:Object = null, alpha:Object = null, rot:Object = null, gradient:String = null, ratios:Array = null, hole:Object = null):void Programmatically draws a rectangle into this skin's Graphics object. | UIComponent
|  | effectFinished(effectInst:IEffectInstance):void Called by the effect instance when it stops playing on the component. | UIComponent
|  | effectStarted(effectInst:IEffectInstance):void Called by the effect instance when it starts playing on the component. | UIComponent
|  | endEffectsStarted():void Ends all currently playing effects on the component. | UIComponent
|  | executeBindings(recurse:Boolean = false):void Executes all the bindings for which the UIComponent object is the destination. | UIComponent
|  | findString(str:String):Boolean Finds an item in the list based on a String, and moves the selection to it. | ListBase
|  | finishPrint(obj:Object, target:IFlexDisplayObject):void Called after printing is complete. | UIComponent
|  | generateMXMLArray(document:Object, data:Array, recursive:Boolean = true):Array | UIComponent
|  | generateMXMLVector(document:Object, data:Array, recursive:Boolean = true):* | UIComponent
|  | getAutomationChildAt(index:int):IAutomationObject Provides the automation object at the specified index. | UIComponent
|  | getAutomationChildren():Array Provides the automation object list . | UIComponent
|  | getBoundsXAtSize(width:Number, height:Number, postLayoutTransform:Boolean = true):Number Returns the x coordinate of the element's bounds at the specified element size. | UIComponent
|  | getBoundsYAtSize(width:Number, height:Number, postLayoutTransform:Boolean = true):Number Returns the y coordinate of the element's bounds at the specified element size. | UIComponent
|  | getClassStyleDeclarations():Array Finds the type selectors for this UIComponent instance. | UIComponent
|  | getConstraintValue(constraintName:String):* Returns a layout constraint value, which is the same as getting the constraint style for this component. | UIComponent
|  | getExplicitOrMeasuredHeight():Number A convenience method for determining whether to use the explicit or measured height | UIComponent
|  | getExplicitOrMeasuredWidth():Number A convenience method for determining whether to use the explicit or measured width | UIComponent
|  | getFocus():InteractiveObject Gets the object that currently has focus. | UIComponent
|  | getItemRendererFactory(data:Object):IFactory Return the appropriate factory, using the default factory if none specified. | ListBase
|  | getLayoutBoundsHeight(postLayoutTransform:Boolean = true):Number Returns the element's layout height. | UIComponent
|  | getLayoutBoundsWidth(postLayoutTransform:Boolean = true):Number Returns the element's layout width. | UIComponent
|  | getLayoutBoundsX(postLayoutTransform:Boolean = true):Number Returns the x coordinate that the element uses to draw on screen. | UIComponent
|  | getLayoutBoundsY(postLayoutTransform:Boolean = true):Number Returns the y coordinate that the element uses to draw on screen. | UIComponent
|  | getLayoutMatrix():Matrix Returns the transform matrix that is used to calculate the component's layout relative to its siblings. | UIComponent
|  | getLayoutMatrix3D():Matrix3D Returns the layout transform Matrix3D for this element. | UIComponent
|  | getMaxBoundsHeight(postLayoutTransform:Boolean = true):Number Returns the element's maximum height. | UIComponent
|  | getMaxBoundsWidth(postLayoutTransform:Boolean = true):Number Returns the element's maximum width. | UIComponent
|  | getMinBoundsHeight(postLayoutTransform:Boolean = true):Number Returns the element's minimum height. | UIComponent
|  | getMinBoundsWidth(postLayoutTransform:Boolean = true):Number Returns the element's minimum width. | UIComponent
|  | getPreferredBoundsHeight(postLayoutTransform:Boolean = true):Number Returns the element's preferred height. | UIComponent
|  | getPreferredBoundsWidth(postLayoutTransform:Boolean = true):Number Returns the element's preferred width. | UIComponent
|  | getRendererSemanticValue(target:Object, semanticProperty:String):Object Returns true or false to indicates whether the effect should play on the target. | ListBase
|  | getRepeaterItem(whichRepeater:int = -1):Object Returns the item in the dataProvider that was used by the specified Repeater to produce this Repeater, or null if this Repeater isn't repeated. | UIComponent
|  | getStyle(styleProp:String):* Gets a style property that has been set anywhere in this component's style lookup chain. | UIComponent
|  | getVisibleRect(targetParent:DisplayObject = null):Rectangle Get the bounds of this object that are visible to the user on the screen. | UIComponent
|  | globalToContent(point:Point):Point Converts a Point object from global to content coordinates. | UIComponent
|  | hasCSSState():Boolean Returns true if currentCSSState is not null. | UIComponent
|  | hasState(stateName:String):Boolean Determines whether the specified state has been defined on this UIComponent. | UIComponent
|  | hideDropFeedback(event:DragEvent):void Hides the drop indicator under the mouse pointer that indicates that a drag and drop operation is allowed. | ListBase
|  | horizontalGradientMatrix(x:Number, y:Number, width:Number, height:Number):Matrix Returns a box Matrix which can be passed to the drawRoundRect() method as the rot parameter when drawing a horizontal gradient. | UIComponent
|  | indexToItemRenderer(index:int):IListItemRenderer Get an item renderer for the index of an item in the data provider, if one exists. | ListBase
|  | indicesToIndex(rowIndex:int, colIndex:int):int Computes the offset into the data provider of the item at colIndex, rowIndex. | ListBase
|  | initialize():void Initializes the internal structure of this component. | UIComponent
|  | initializeRepeaterArrays(parent:IRepeaterClient):void Initializes various properties which keep track of repeated instances of this component. | UIComponent
|  | invalidateDisplayList():void Marks a component so that its updateDisplayList() method gets called during a later screen update. | UIComponent
|  | invalidateLayering():void Called by a component's items to indicate that their depth property has changed. | UIComponent
|  | invalidateLayoutDirection():void An element must call this method when its layoutDirection changes or when its parent's layoutDirection changes. | UIComponent
|  | invalidateList():void Refresh all rows on the next update. | ListBase
|  | invalidateProperties():void Marks a component so that its commitProperties() method gets called during a later screen update. | UIComponent
|  | invalidateSize():void Marks a component so that its measure() method gets called during a later screen update. | UIComponent
|  | isItemHighlighted(data:Object):Boolean Determines if the item renderer for a data provider item is highlighted (is rolled over via the mouse or under the caret due to keyboard navigation). | ListBase
|  | isItemSelectable(data:Object):Boolean Determines if the item renderer for a data provider item is selectable. | ListBase
|  | isItemSelected(data:Object):Boolean Determines if the item renderer for a data provider item is selected. | ListBase
|  | isItemShowingCaret(data:Object):Boolean Determines if the item renderer for a data provider item is the item under the caret due to keyboard navigation. | ListBase
|  | isItemVisible(item:Object):Boolean Determines if an item is being displayed by a renderer. | ListBase
|  | itemRendererContains(renderer:IListItemRenderer, object:DisplayObject):Boolean Determines whether a renderer contains (or owns) a display object. | ListBase
|  | itemRendererToIndex(itemRenderer:IListItemRenderer):int Returns the index of the item in the data provider of the item being rendered by this item renderer. | ListBase
|  | itemToDataTip(data:Object):String Returns the dataTip string the renderer would display for the given data object based on the dataTipField and dataTipFunction properties. | ListBase
|  | itemToIcon(data:Object):Class Returns the class for an icon, if any, for a data item, based on the iconField and iconFunction properties. | ListBase
|  | itemToItemRenderer(item:Object):IListItemRenderer Returns the item renderer for a given item in the data provider, if there is one. | ListBase
|  | itemToLabel(data:Object):String Returns the string the renderer would display for the given data object based on the labelField and labelFunction properties. | ListBase
|  | localToContent(point:Point):Point Converts a Point object from local to content coordinates. | UIComponent
|  | matchesCSSState(cssState:String):Boolean Returns true if cssState matches currentCSSState. | UIComponent
|  | matchesCSSType(cssType:String):Boolean Determines whether this instance is the same as, or is a subclass of, the given type. | UIComponent
|  | measureHeightOfItems(index:int = -1, count:int = 0):Number Measures a set of items from the data provider using the current item renderer and returns the sum of the heights of those items. | ListBase
|  | measureHTMLText(htmlText:String):TextLineMetrics Measures the specified HTML text, which can contain HTML tags such as <font> and <b>, assuming that it is displayed in a single-line UITextField using a UITextFormat determined by the styles of this UIComponent. | UIComponent
|  | measureText(text:String):TextLineMetrics Measures the specified text, assuming that it is displayed in a single-line UITextField (or UIFTETextField) using a UITextFormat determined by the styles of this UIComponent. | UIComponent
|  | measureWidthOfItems(index:int = -1, count:int = 0):Number Measures a set of items from the data provider using the current item renderer and returns the maximum width found. | ListBase
|  | move(x:Number, y:Number):void Moves the component to a specified position within its parent. | UIComponent
|  | notifyStyleChangeInChildren(styleProp:String, recursive:Boolean):void Propagates style changes to the children. | UIComponent
|  | owns(child:DisplayObject):Boolean Returns true if the chain of owner properties points from child to this UIComponent. | UIComponent
|  | parentChanged(p:DisplayObjectContainer):void Called by Flex when a UIComponent object is added to or removed from a parent. | UIComponent
|  | prepareToPrint(target:IFlexDisplayObject):Object Prepares an IFlexDisplayObject for printing. | UIComponent
|  | regenerateStyleCache(recursive:Boolean):void Builds or rebuilds the CSS style cache for this component and, if the recursive parameter is true, for all descendants of this component as well. | UIComponent
|  | registerEffects(effects:Array):void For each effect event, registers the EffectManager as one of the event listeners. | UIComponent
|  | removeDataEffectItem(item:Object):void Removes an item renderer if a data change effect is running. | ListBase
|  | removeStyleClient(styleClient:IAdvancedStyleClient):void Removes a non-visual style client from this component instance. | UIComponent
|  | replayAutomatableEvent(event:Event):Boolean Replays the specified event. | UIComponent
|  | resolveAutomationIDPart(criteria:Object):Array Resolves a child by using the id provided. | UIComponent
|  | resumeBackgroundProcessing():void [static] Resumes the background processing of methods queued by callLater(), after a call to suspendBackgroundProcessing(). | UIComponent
|  | scrollToIndex(index:int):Boolean Ensures that the data provider item at the given index is visible. | ListBase
|  | setActualSize(w:Number, h:Number):void Sizes the object. | UIComponent
|  | setConstraintValue(constraintName:String, value:*):void Sets a layout constraint value, which is the same as setting the constraint style for this component. | UIComponent
|  | setCurrentState(stateName:String, playTransition:Boolean = true):void Set the current state. | UIComponent
|  | setFocus():void Sets the focus to this component. | UIComponent
|  | setLayoutBoundsPosition(x:Number, y:Number, postLayoutTransform:Boolean = true):void Sets the coordinates that the element uses to draw on screen. | UIComponent
|  | setLayoutBoundsSize(width:Number, height:Number, postLayoutTransform:Boolean = true):void Sets the layout size of the element. | UIComponent
|  | 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. | UIComponent
|  | 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. | UIComponent
|  | setMXMLDescriptor(value:Array):void | UIComponent
|  | setMXMLProperties(value:Array):void | UIComponent
|  | setStyle(styleProp:String, newValue:*):void Sets a style property on this component instance. | UIComponent
|  | setVisible(value:Boolean, noEvent:Boolean = false):void Called when the visible property changes. | UIComponent
|  | showDropFeedback(event:DragEvent):void Displays a drop indicator under the mouse pointer to indicate that a drag and drop operation is allowed and where the items will be dropped. | ListBase
|  | styleChanged(styleProp:String):void Detects changes to style properties. | UIComponent
|  | stylesInitialized():void Flex calls the stylesInitialized() method when the styles for a component are first initialized. | UIComponent
|  | suspendBackgroundProcessing():void [static] Blocks the background processing of methods queued by callLater(), until resumeBackgroundProcessing() is called. | UIComponent
|  | toString():String [override] Returns a string indicating the location of this object within the hierarchy of DisplayObjects in the Application. | FlexSprite
|  | 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. | UIComponent
|  | transformPointToParent(localPosition:Vector3D, position:Vector3D, postLayoutPosition:Vector3D):void A utility method to transform a point specified in the local coordinates of this object to its location in the object's parent's coordinates. | UIComponent
|  | unconstrainRenderer(item:Object):void Called by an UnconstrainItemAction effect as part of a data change effect if the item renderers corresponding to certain data items need to move outside the normal positions of item renderers in the control. | ListBase
|  | validateDisplayList():void Validates the position and size of children and draws other visuals. | UIComponent
|  | validateNow():void Validate and update the properties and layout of this object and redraw it, if necessary. | UIComponent
|  | validateProperties():void Used by layout logic to validate the properties of a component by calling the commitProperties() method. | UIComponent
|  | validateSize(recursive:Boolean = false):void Validates the measured size of the component If the LayoutManager.invalidateSize() method is called with this ILayoutManagerClient, then the validateSize() method is called when it's time to do measurements. | UIComponent
|  | validationResultHandler(event:ValidationResultEvent):void Handles both the valid and invalid events from a validator assigned to this component. | UIComponent
|  | verticalGradientMatrix(x:Number, y:Number, width:Number, height:Number):Matrix Returns a box Matrix which can be passed to drawRoundRect() as the rot parameter when drawing a vertical gradient. | UIComponent

Protected Methods
Show Inherited Protected Methods
Show Inherited Protected Methods

| Method | Defined By
--- | --- | ---
|  | addDragData(dragSource:Object):void Adds the selected items to the DragSource object as part of a drag-and-drop operation. | ListBase
|  | addMXMLChildren(comps:Array):void | UIComponent
|  | addToFreeItemRenderers(item:IListItemRenderer):void Adds a renderer to the recycled renderer list, making it invisible and cleaning up references to it. | ListBase
|  | addToRowArrays():void Add a blank row to the beginning of the arrays that store references to the rows. | ListBase
|  | adjustFocusRect(obj:DisplayObject = null):void Adjust the focus rectangle. | UIComponent
|  | adjustListContent(unscaledWidth:Number = -1, unscaledHeight:Number = -1):void Called from the updateDisplayList() method to adjust the size and position of listContent. | ListBase
|  | applyComputedMatrix():void Commits the computed matrix built from the combination of the layout matrix and the transform offsets to the flash displayObject's transform. | UIComponent
|  | applySelectionEffect(indicator:Sprite, uid:String, itemRenderer:IListItemRenderer):void Sets up the effect for applying the selection indicator. | ListBase
|  | attachOverlay():void This is an internal method used by the Flex framework to support the Dissolve effect. | UIComponent
|  | calculateDropIndicatorY(rowCount:Number, rowNum:int):Number Calculates the y position of the drop indicator when performing a drag-and-drop operation. | ListBase
|  | canSkipMeasurement():Boolean Determines if the call to the measure() method can be skipped. | UIComponent
|  | childrenCreated():void Performs any final processing after child objects are created. | UIComponent
|  | clearCaretIndicator(indicator:Sprite, itemRenderer:IListItemRenderer):void Clears the caret indicator into the given Sprite. | ListBase
|  | clearHighlightIndicator(indicator:Sprite, itemRenderer:IListItemRenderer):void Clears the highlight indicator in the given Sprite. | ListBase
|  | clearIndicators():void Removes all selection and highlight and caret indicators. | ListBase
|  | clearSelected(transition:Boolean = false):void Clears the set of selected items and removes all graphics depicting the selected state of those items. | ListBase
|  | clearVisibleData():void Empty the visibleData hash table. | ListBase
|  | collectionChangeHandler(event:Event):void Handles CollectionEvents dispatched from the data provider as the data changes. | ListBase
|  | commitProperties():void [override] Calculates the column width and row height and number of rows and columns based on whether properties like columnCount columnWidth, rowHeight and rowCount were explicitly set. | ListBase
|  | configureScrollBars():void Configures the ScrollBars based on the number of rows and columns and viewable rows and columns. | ListBase
|  | copyItemWithUID(item:Object):Object Makes a deep copy of the object by calling the ObjectUtil.copy() method, and replaces the copy's uid property (if present) with a new value by calling the UIDUtil.createUID() method. | ListBase
|  | copySelectedItems(useDataField:Boolean = true):Array Copies the selected items in the order that they were selected. | ListBase
|  | createBorder():void Creates the border for this component. | ScrollControlBase
|  | createChildren():void [override] Creates objects that are children of this ListBase; in this case, the listContent object that will hold all the item renderers. | ListBase
|  | createInFontContext(classObj:Class):Object Creates a new object using a context based on the embedded font being used. | UIComponent
|  | createInModuleContext(moduleFactory:IFlexModuleFactory, className:String):Object Creates the object using a given moduleFactory. | UIComponent
|  | destroyRow(i:int, numCols:int):void Recycle a row that is no longer needed, and remove its indicators. | ListBase
|  | dispatchPropertyChangeEvent(prop:String, oldValue:*, value:*):void Helper method for dispatching a PropertyChangeEvent when a property is updated. | UIComponent
|  | dragCompleteHandler(event:DragEvent):void Handles DragEvent.DRAG_COMPLETE events. | ListBase
|  | dragDropHandler(event:DragEvent):void Handles DragEvent.DRAG_DROP events. | ListBase
|  | dragEnterHandler(event:DragEvent):void Handles DragEvent.DRAG_ENTER events. | ListBase
|  | dragExitHandler(event:DragEvent):void Handles DragEvent.DRAG_EXIT events. | ListBase
|  | dragOverHandler(event:DragEvent):void Handles DragEvent.DRAG_OVER events. | ListBase
|  | dragScroll():void Interval function that scrolls the list up or down if the mouse goes above or below the list. | ListBase
|  | dragStartHandler(event:DragEvent):void The default handler for the dragStart event. | ListBase
|  | drawCaretIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void Draws the caret indicator into the given Sprite at the position, width and height specified using the color specified. | ListBase
|  | drawHighlightIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void Draws the highlight indicator into the given Sprite at the position, width and height specified using the color specified. | ListBase
|  | drawItem(item:IListItemRenderer, selected:Boolean = false, highlighted:Boolean = false, caret:Boolean = false, transition:Boolean = false):void Draws the renderer with indicators that it is highlighted, selected, or the caret. | ListBase
|  | drawRowBackgrounds():void Draws any alternating row colors, borders and backgrounds for the rows. | ListBase
|  | drawSelectionIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void Draws the selection indicator into the given Sprite at the position, width and height specified using the color specified. | ListBase
|  | findKey(eventCode:int):Boolean Tries to find the next item in the data provider that starts with the character in the eventCode parameter. | ListBase
|  | finishDataChangeEffect(event:EffectEvent):void Cleans up after a data change effect has finished running by restoring the original collection and iterator and removing any cached values used by the effect. | ListBase
|  | finishKeySelection():void Sets selected items based on the caretIndex and anchorIndex properties. | ListBase
|  | focusInHandler(event:FocusEvent):void The event handler called when a UIComponent object gets focus. | UIComponent
|  | focusOutHandler(event:FocusEvent):void The event handler called when a UIComponent object loses focus. | UIComponent
|  | generateMXMLAttributes(data:Array):void | UIComponent
|  | generateMXMLInstances(document:Object, data:Array, recursive:Boolean = true):void | UIComponent
|  | generateMXMLObject(document:Object, data:Array):Object | UIComponent
|  | getReservedOrFreeItemRenderer(data:Object):IListItemRenderer Retrieves an already-created item renderer not currently in use. | ListBase
|  | indexToColumn(index:int):int The column for the data provider item at the given index. | ListBase
|  | indexToRow(index:int):int The row for the data provider item at the given index. | ListBase
|  | initAdvancedLayoutFeatures():void Initializes the implementation and storage of some of the less frequently used advanced layout features of a component. | UIComponent
|  | initializationComplete():void Finalizes the initialization of this component. | UIComponent
|  | initializeAccessibility():void Initializes this component's accessibility code. | UIComponent
|  | initiateDataChangeEffect(unscaledWidth:Number, unscaledHeight:Number):void Initiates a data change effect when there have been changes in the data provider. | ListBase
|  | invalidateParentSizeAndDisplayList():void Helper method to invalidate parent size and display list if this object affects its layout (includeInLayout is true). | UIComponent
|  | isOurFocus(target:DisplayObject):Boolean Typically overridden by components containing UITextField objects, where the UITextField object gets focus. | UIComponent
|  | isRendererUnconstrained(item:Object):Boolean Returns true if an item renderer is no longer being positioned by the list's layout algorithm while a data change effect is running as a result of a call to the unconstrainRenderer() method. | ListBase
|  | itemRendererToIndices(item:IListItemRenderer):Point Returns a Point containing the columnIndex and rowIndex of an item renderer. | ListBase
|  | itemToUID(data:Object):String Determines the UID for a data provider item. | ListBase
|  | keyDownHandler(event:KeyboardEvent):void The event handler called for a keyDown event. | UIComponent
|  | keyUpHandler(event:KeyboardEvent):void The event handler called for a keyUp event. | UIComponent
|  | layoutChrome(unscaledWidth:Number, unscaledHeight:Number):void Responds to size changes by setting the positions and sizes of this control's borders. | ScrollControlBase
|  | makeRowsAndColumns(left:Number, top:Number, right:Number, bottom:Number, firstColumn:int, firstRow:int, byCount:Boolean = false, rowsNeeded:uint = 0):Point Make enough rows and columns to fill the area described by left, top, right, bottom. | ListBase
|  | measure():void [override] Calculates the measured width and height of the component based on the rowCount, columnCount, rowHeight and columnWidth properties. | ListBase
|  | mouseClickHandler(event:MouseEvent):void Handles MouseEvent.MOUSE_CLICK events from any mouse targets contained in the list including the renderers. | ListBase
|  | mouseDoubleClickHandler(event:MouseEvent):void Handles MouseEvent.MOUSE_DOUBLE_CLICK events from any mouse targets contained in the list including the renderers. | ListBase
|  | mouseDownHandler(event:MouseEvent):void Handles MouseEvent.MOUSE_DOWN events from any mouse targets contained in the list including the renderers. | ListBase
|  | mouseEventToItemRenderer(event:MouseEvent):IListItemRenderer Determines which item renderer is under the mouse. | ListBase
|  | mouseMoveHandler(event:MouseEvent):void Handles MouseEvent.MOUSE_MOVE events from any mouse targets contained in the list including the renderers. | ListBase
|  | mouseOutHandler(event:MouseEvent):void Handles MouseEvent.MOUSE_OUT events from any mouse targets contained in the list including the renderers. | ListBase
|  | mouseOverHandler(event:MouseEvent):void Handles MouseEvent.MOUSE_OVER events from any mouse targets contained in the list, including the renderers. | ListBase
|  | mouseUpHandler(event:MouseEvent):void Handles MouseEvent.MOUSE_DOWN events from any mouse targets contained in the list including the renderers. | ListBase
|  | mouseWheelHandler(event:MouseEvent):void [override] Handles mouseWheel events by changing scroll positions. | ListBase
|  | moveIndicatorsHorizontally(uid:String, moveBlockDistance:Number):void Move the selection and highlight indicators horizontally. | ListBase
|  | moveIndicatorsVertically(uid:String, moveBlockDistance:Number):void Move the selection and highlight indicators vertically. | ListBase
|  | moveRowVertically(i:int, numCols:int, moveBlockDistance:Number):void Move a row vertically, and update the rowInfo record. | ListBase
|  | moveSelectionHorizontally(code:uint, shiftKey:Boolean, ctrlKey:Boolean):void Moves the selection in a horizontal direction in response to the user selecting items using the left arrow or right arrow keys and modifiers such as the Shift and Ctrl keys. | ListBase
|  | moveSelectionVertically(code:uint, shiftKey:Boolean, ctrlKey:Boolean):void Moves the selection in a vertical direction in response to the user selecting items using the up arrow or down arrow Keys and modifiers such as the Shift and Ctrl keys. | ListBase
|  | prepareDataEffect(ce:CollectionEvent):void Prepares the data effect for the collection event. | ListBase
|  | purgeItemRenderers():void Called by the updateDisplayList() method to remove existing item renderers and clean up various caching structures when the renderer changes. | ListBase
|  | reKeyVisibleData():void Update the keys in the visibleData hash table. | ListBase
|  | removeFromRowArrays(i:int):void Remove a row from the arrays that store references to the row. | ListBase
|  | removeIndicators(uid:String):void Cleans up selection highlights and other associated graphics for a given item in the data provider. | ListBase
|  | resourcesChanged():void This method is called when a UIComponent is constructed, and again whenever the ResourceManager dispatches a "change" Event to indicate that the localized resources have changed in some way. | UIComponent
|  | restoreRowArrays(modDeltaPos:int):void Remove the requested number of rows from the beginning of the arrays that store references to the rows. | ListBase
|  | roomForScrollBar(bar:ScrollBar, unscaledWidth:Number, unscaledHeight:Number):Boolean Determines if there is enough space in this component to display a given scrollbar. | ScrollControlBase
|  | scrollHandler(event:Event):void Default event handler for the scroll event. | ScrollControlBase
|  | scrollHorizontally(pos:int, deltaPos:int, scrollUp:Boolean):void Adjusts the renderers in response to a change in scroll position. | ListBase
|  | scrollPositionToIndex(horizontalScrollPosition:int, verticalScrollPosition:int):int Returns the data provider index for the item at the first visible row and column for the given scroll positions. | ListBase
|  | scrollVertically(pos:int, deltaPos:int, scrollUp:Boolean):void Adjusts the renderers in response to a change in scroll position. | ListBase
|  | seekPendingFailureHandler(data:Object, info:ListBaseSeekPending):void The default failure handler when a seek fails due to a page fault. | ListBase
|  | seekPendingResultHandler(data:Object, info:ListBaseSeekPending):void The default result handler when a seek fails due to a page fault. | ListBase
|  | seekPositionSafely(index:int):Boolean Seek to a position, and handle an ItemPendingError if necessary. | ListBase
|  | selectItem(item:IListItemRenderer, shiftKey:Boolean, ctrlKey:Boolean, transition:Boolean = true):Boolean Updates the set of selected items given that the item renderer provided was clicked by the mouse and the keyboard modifiers are in the given state. | ListBase
|  | setRowCount(v:int):void Sets the rowCount property without causing invalidation or setting the explicitRowCount property, which permanently locks in the number of rows. | ListBase
|  | setRowHeight(v:Number):void Sets the rowHeight property without causing invalidation or setting of explicitRowHeight which permanently locks in the height of the rows. | ListBase
|  | setScrollBarProperties(totalColumns:int, visibleColumns:int, totalRows:int, visibleRows:int):void Causes the ScrollControlBase to show or hide scrollbars based on the parameters passed in. | ScrollControlBase
|  | setStretchXY(stretchX:Number, stretchY:Number):void Specifies a transform stretch factor in the horizontal and vertical direction. | UIComponent
|  | shiftRow(oldIndex:int, newIndex:int, numCols:int, shiftItems:Boolean):void Shift a row in the arrays that reference rows. | ListBase
|  | stateChanged(oldState:String, newState:String, recursive:Boolean):void This method is called when a state changes to check whether state-specific styles apply to this component. | UIComponent
|  | sumRowHeights(startRowIdx:int, endRowIdx:int):Number Determine the height of the requested set of rows. | ListBase
|  | truncateRowArrays(numRows:int):void Remove all remaining rows from the end of the arrays that store references to the rows. | ListBase
|  | UIDToItemRenderer(uid:String):IListItemRenderer Find an item renderer based on its UID if it is visible. | ListBase
|  | updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void [override] Adds or removes item renderers if the number of displayable items changed. | ListBase
|  | updateList():void Refreshes all rows. | ListBase

Events
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| Event | Summary | Defined By
--- | --- | --- | ---
|  | add | Dispatched when the component is added to a container as a content child by using the addChild(), addChildAt(), addElement(), or addElementAt() method. | UIComponent
|  | change | Dispatched when the selectedIndex or selectedItem property changes as a result of user interaction. | ListBase
|  | creationComplete | Dispatched when the component has finished its construction, property processing, measuring, layout, and drawing. | UIComponent
|  | currentStateChange | Dispatched after the view state has changed. | UIComponent
|  | currentStateChanging | Dispatched after the currentState property changes, but before the view state changes. | UIComponent
|  | dataChange | Dispatched when the data property changes. | ListBase
|  | dragComplete | Dispatched by the drag initiator (the component that is the source of the data being dragged) when the drag operation completes, either when you drop the dragged data onto a drop target or when you end the drag-and-drop operation without performing a drop. | UIComponent
|  | dragDrop | Dispatched by the drop target when the user releases the mouse over it. | UIComponent
|  | dragEnter | Dispatched by a component when the user moves the mouse over the component during a drag operation. | UIComponent
|  | dragExit | Dispatched by the component when the user drags outside the component, but does not drop the data onto the target. | UIComponent
|  | dragOver | Dispatched by a component when the user moves the mouse while over the component during a drag operation. | UIComponent
|  | dragStart | Dispatched by the drag initiator when starting a drag operation. | UIComponent
|  | effectEnd | Dispatched after an effect ends. | UIComponent
|  | effectStart | Dispatched just before an effect starts. | UIComponent
|  | effectStop | Dispatched after an effect is stopped, which happens only by a call to stop() on the effect. | UIComponent
|  | enterState | Dispatched after the component has entered a view state. | UIComponent
|  | exitState | Dispatched just before the component exits a view state. | UIComponent
|  | hide | Dispatched when an object's state changes from visible to invisible. | UIComponent
|  | initialize | Dispatched when the component has finished its construction and has all initialization properties set. | UIComponent
|  | invalid | Dispatched when a component is monitored by a Validator and the validation failed. | UIComponent
|  | itemClick | Dispatched when the user clicks on an item in the control. | ListBase
|  | itemDoubleClick | Dispatched when the user double-clicks on an item in the control. | ListBase
|  | itemRollOut | Dispatched when the user rolls the mouse pointer out of an item in the control. | ListBase
|  | itemRollOver | Dispatched when the user rolls the mouse pointer over an item in the control. | ListBase
|  | mouseDownOutside | Dispatched from a component opened using the PopUpManager when the user clicks outside it. | UIComponent
|  | mouseWheelOutside | Dispatched from a component opened using the PopUpManager when the user scrolls the mouse wheel outside it. | UIComponent
|  | move | Dispatched when the object has moved. | UIComponent
|  | preinitialize | Dispatched at the beginning of the component initialization sequence. | UIComponent
|  | remove | Dispatched when the component is removed from a container as a content child by using the removeChild(), removeChildAt(), removeElement(), or removeElementAt() method. | UIComponent
|  | resize | Dispatched when the component is resized. | UIComponent
|  | scroll | Dispatched when the content is scrolled. | ScrollControlBase
|  | show | Dispatched when an object's state changes from invisible to visible. | UIComponent
|  | stateChangeComplete | Dispatched after the component has entered a new state and any state transition animation to that state has finished playing. | UIComponent
|  | stateChangeInterrupted | Dispatched when a component interrupts a transition to its current state in order to switch to a new state. | UIComponent
|  | toolTipCreate | Dispatched by the component when it is time to create a ToolTip. | UIComponent
|  | toolTipEnd | Dispatched by the component when its ToolTip has been hidden and is to be discarded soon. | UIComponent
|  | toolTipHide | Dispatched by the component when its ToolTip is about to be hidden. | UIComponent
|  | toolTipShow | Dispatched by the component when its ToolTip is about to be shown. | UIComponent
|  | toolTipShown | Dispatched by the component when its ToolTip has been shown. | UIComponent
|  | toolTipStart | Dispatched by a component whose toolTip property is set, as soon as the user moves the mouse over it. | UIComponent
|  | touchInteractionEnd | A non-cancellable event, dispatched by a component when it is done responding to a touch interaction user gesture. | UIComponent
|  | touchInteractionStart | A non-cancellable event, dispatched by a component when it starts responding to a touch interaction user gesture. | UIComponent
|  | touchInteractionStarting | A cancellable event, dispatched by a component in an attempt to respond to a touch interaction user gesture. | UIComponent
|  | updateComplete | Dispatched when an object has had its commitProperties(), measure(), and updateDisplayList() methods called (if needed). | UIComponent
|  | valid | Dispatched when a component is monitored by a Validator and the validation succeeded. | UIComponent
|  | valueCommit | Dispatched when values are changed programmatically or by user interaction. | UIComponent

Styles
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| Style | Description | Defined By
--- | --- | --- | ---
|  | accentColor | Type: uint Format: Color CSS Inheritance: yes Theme: spark Accent color used by component skins. | ScrollControlBase
|  | alternatingItemColors | Type: Array Format: Color CSS Inheritance: yes The colors to use for the backgrounds of the items in the list. The value is an array of one or more colors. The backgrounds of the list items alternate among the colors in the array. For DataGrid controls, all items in a row have the same background color, and each row's background color is determined from the array of colors. For the TileList control, which uses a single list to populate a two-dimensional display, the style can result in a checkerboard appearance, stripes, or other patterns based on the number of columns and rows and the number of colors specified. TileList cycles through the colors, placing the individual item background colors according to the layout direction. If you have an even number of colors and an even number of columns for a TileList layed out horizontally, you will get striping. If the number of columns is an odd number, you will get a checkerboard pattern. The default value is`undefined`. | ListBase
|  | backgroundAlpha | Type: Number CSS Inheritance: no Theme: halo Alpha level of the color defined by the `backgroundColor` property, of the image or SWF file defined by the `backgroundImage` style. | ScrollControlBase
|  | backgroundColor | Type: uint Format: Color CSS Inheritance: no Theme: halo Background color of a component. | ScrollControlBase
|  | backgroundDisabledColor | Type: uint Format: Color CSS Inheritance: yes Theme: halo Background color of the component when it is disabled. | ScrollControlBase
|  | backgroundImage | Type: Object Format: File CSS Inheritance: no Theme: halo Background image of a component. | ScrollControlBase
|  | backgroundSize | Type: String CSS Inheritance: no Theme: halo Scales the image specified by `backgroundImage` to different percentage sizes. | ScrollControlBase
|  | baseline | Type: String CSS Inheritance: no The vertical distance in pixels from the top edge of the content area to the control's baseline position. | UIComponent
|  | borderAlpha | Type: Number CSS Inheritance: no Theme: spark Alpha of the border. | ScrollControlBase
|  | borderColor | Type: uint Format: Color CSS Inheritance: no Theme: halo, spark Color of the border. | ScrollControlBase
|  | borderSides | Type: String CSS Inheritance: no Theme: halo Bounding box sides. | ScrollControlBase
|  | borderSkin | Type: Class CSS Inheritance: no The border skin class of the component. | ScrollControlBase
|  | borderStyle | Type: String CSS Inheritance: no Bounding box style. | ScrollControlBase
|  | borderThickness | Type: Number Format: Length CSS Inheritance: no Theme: halo Bounding box thickness. | ScrollControlBase
|  | borderVisible | Type: Boolean CSS Inheritance: no Theme: spark Visibility of the border. | ScrollControlBase
|  | bottom | Type: String CSS Inheritance: no The vertical distance, in pixels, from the bottom edge of the component to the bottom edge of its parent container's content area. | UIComponent
|  | chromeColor | Type: uint Format: Color CSS Inheritance: yes Theme: spark The main color for a component. | ScrollControlBase
|  | color | Type: uint Format: Color CSS Inheritance: yes Color of text in the component, including the component label. | ScrollControlBase
|  | contentBackgroundAlpha | Type: Number CSS Inheritance: yes Theme: spark The alpha of the content background for this component. | ScrollControlBase
|  | contentBackgroundColor | Type: uint Format: Color CSS Inheritance: yes Theme: spark Color of the content area of the component. | ScrollControlBase
|  | cornerRadius | Type: Number Format: Length CSS Inheritance: no Theme: halo Radius of component corners. | ScrollControlBase
|  | direction | Type: String CSS Inheritance: yes The directionality of the text displayed by the component. | ScrollControlBase
|  | disabledColor | Type: uint Format: Color CSS Inheritance: yes Color of text in the component if it is disabled. | ScrollControlBase
|  | dropIndicatorSkin | Type: Class CSS Inheritance: no The skin to use to indicate where a dragged item can be dropped. When a ListBase-derived component is a potential drop target in a drag-and-drop operation, a call to the `showDropFeedback()` method makes an instance of this class and positions it one pixel above the itemRenderer for the item where, if the drop occurs, is the item after the dropped item. The default value is`mx.controls.listClasses.ListDropIndicator`. | ListBase
|  | dropShadowColor | Type: uint Format: Color CSS Inheritance: yes Theme: halo Color of the drop shadow. | ScrollControlBase
|  | dropShadowEnabled | Type: Boolean CSS Inheritance: no Theme: halo Boolean property that specifies whether the component has a visible drop shadow. | ScrollControlBase
|  | dropShadowVisible | Type: Boolean CSS Inheritance: no Theme: spark Boolean property that specifies whether the component has a visible drop shadow. | ScrollControlBase
|  | errorColor | Type: uint Format: Color CSS Inheritance: yes Color of the component highlight when validation fails. | UIComponent
|  | focusAlpha | Type: Number CSS Inheritance: no Specifies the alpha transparency value of the focus skin. | ScrollControlBase
|  | focusBlendMode | Type: String CSS Inheritance: no Blend mode used by the focus rectangle. | UIComponent
|  | focusColor | Type: uint Format: Color CSS Inheritance: yes Theme: spark Color of focus ring when the component is in focus. | ScrollControlBase
|  | focusRoundedCorners | Type: String CSS Inheritance: no Specifies which corners of the focus rectangle should be rounded. | ScrollControlBase
|  | focusSkin | Type: Class CSS Inheritance: no Skin used to draw the focus rectangle. | UIComponent
|  | focusThickness | Type: Number Format: Length CSS Inheritance: no Thickness, in pixels, of the focus rectangle outline. | UIComponent
|  | fontAntiAliasType | Type: String CSS Inheritance: yes Sets the `antiAliasType` property of internal TextFields. See also flash.text.TextField flash.text.AntiAliasType | ScrollControlBase
|  | fontFamily | Type: String CSS Inheritance: yes Name of the font to use. | ScrollControlBase
|  | fontGridFitType | Type: String CSS Inheritance: yes Sets the `gridFitType` property of internal TextFields that represent text in Flex controls. See also flash.text.TextField flash.text.GridFitType | ScrollControlBase
|  | fontSharpness | Type: Number CSS Inheritance: yes Sets the `sharpness` property of internal TextFields that represent text in Flex controls. See also flash.text.TextField | ScrollControlBase
|  | fontSize | Type: Number Format: Length CSS Inheritance: yes Height of the text, in pixels. | ScrollControlBase
|  | fontStyle | Type: String CSS Inheritance: yes Determines whether the text is italic font. | ScrollControlBase
|  | fontThickness | Type: Number CSS Inheritance: yes Sets the `thickness` property of internal TextFields that represent text in Flex controls. See also flash.text.TextField | ScrollControlBase
|  | fontWeight | Type: String CSS Inheritance: yes Determines whether the text is boldface. | ScrollControlBase
|  | horizontalCenter | Type: String CSS Inheritance: no The horizontal distance in pixels from the center of the component's content area to the center of the component. | UIComponent
|  | horizontalScrollBarStyleName | Type: String CSS Inheritance: no Style name for horizontal scrollbar. | ScrollControlBase
|  | interactionMode | Type: String CSS Inheritance: yes The primary interaction mode for this component. See also mx.core.InteractionMode.MOUSE mx.core.InteractionMode.TOUCH | UIComponent
|  | kerning | Type: Boolean CSS Inheritance: yes A Boolean value that indicates whether kerning is enabled (`true`) or disabled (`false`). | ScrollControlBase
|  | layoutDirection | Type: String CSS Inheritance: yes Specifies the desired layout direction of a component. See also MXFTEText.css mx.core.ILayoutDirectionElement mx.core.LayoutDirection | UIComponent
|  | leading | Type: Number Format: Length CSS Inheritance: yes Additional vertical space between lines of text. | ScrollControlBase
|  | left | Type: String CSS Inheritance: no The horizontal distance, in pixels, from the left edge of the component to the left edge of its parent container's content area. | UIComponent
|  | letterSpacing | Type: Number CSS Inheritance: yes The number of additional pixels to appear between each character. | ScrollControlBase
|  | locale | Type: String CSS Inheritance: yes The locale of the text displayed by this component. | ScrollControlBase
|  | paddingBottom | Type: Number Format: Length CSS Inheritance: no The number of pixels between the bottom of the row and the bottom of the renderer in the row. The default value is`2`. | ListBase
|  | paddingLeft | Type: Number Format: Length CSS Inheritance: no Number of pixels between the component's left border and the left edge of its content area. The default value is 0. The default value for a Button control in the Halo theme is 10 and in the Spark theme is 6. The default value for the ComboBox control is 5. The default value for the Form container is 16. The default value for the Tree control is 2. | ListBase
|  | paddingRight | Type: Number Format: Length CSS Inheritance: no Number of pixels between the component's right border and the right edge of its content area. The default value is 0. The default value for a Button control in the Halo theme is 10 and in the Spark theme is 6. The default value for the ComboBox control is 5. The default value for the Form container is 16. | ListBase
|  | paddingTop | Type: Number Format: Length CSS Inheritance: no The number of pixels between the top of the row and the top of the renderer in the row. The default value is`2`. | ListBase
|  | right | Type: String CSS Inheritance: no The horizontal distance, in pixels, from the right edge of the component to the right edge of its parent container's content area. | UIComponent
|  | rollOverColor | Type: uint Format: Color CSS Inheritance: yes The color of the background of a renderer when the user rolls over it. The default value for the Halo theme is `0xB2E1FF`. The default value for the Spark theme is `0xCEDBEF`. | ListBase
|  | selectionColor | Type: uint Format: Color CSS Inheritance: yes The color of the background of a renderer when the user selects it. The default value for the Halo theme is `0x7FCEFF`. The default value for the Spark theme is `0xA8C6EE`. | ListBase
|  | selectionDisabledColor | Type: uint Format: Color CSS Inheritance: yes The color of the background of a renderer when the component is disabled. The default value is`0xDDDDDD`. | ListBase
|  | selectionDuration | Type: Number Format: Time CSS Inheritance: no The duration of the selection effect. When an item is selected an effect plays as the background is colored. Set to 0 to disable the effect. The default value is`250`. | ListBase
|  | selectionEasingFunction | Type: Function CSS Inheritance: no The easingFunction for the selection effect. When an item is selected an effect plays as the background is colored. The default is a linear fade in of the color. An easingFunction can be used for controlling the selection effect. The default value is`undefined`. | ListBase
|  | shadowDirection | Type: String CSS Inheritance: no Theme: halo Direction of the drop shadow. | ScrollControlBase
|  | shadowDistance | Type: Number Format: Length CSS Inheritance: no Theme: halo Distance of the drop shadow. | ScrollControlBase
|  | showErrorSkin | Type: Boolean CSS Inheritance: yes Show the error border or skin when this component is invalid. | UIComponent
|  | showErrorTip | Type: Boolean CSS Inheritance: yes Show the error tip when this component is invalid and the user rolls over it. | UIComponent
|  | symbolColor | Type: uint Format: Color CSS Inheritance: yes Theme: spark Color of any symbol of a component. | ScrollControlBase
|  | textAlign | Type: String CSS Inheritance: yes Alignment of text within a container. | ScrollControlBase
|  | textDecoration | Type: String CSS Inheritance: yes Determines whether the text is underlined. | ScrollControlBase
|  | textFieldClass | Type: Class CSS Inheritance: no The class implementing IUITextField that is used by this component to render text. | ScrollControlBase
|  | textIndent | Type: Number Format: Length CSS Inheritance: yes Offset of first line of text from the left side of the container, in pixels. | ScrollControlBase
|  | textRollOverColor | Type: uint Format: Color CSS Inheritance: yes The color of the text of a renderer when the user rolls over a it. The default value for the Halo theme is `0x2B333C`. The default value for the Spark theme is `0x000000`. | ListBase
|  | textSelectedColor | Type: uint Format: Color CSS Inheritance: yes The color of the text of a renderer when the user selects it. The default value for the Halo theme is `0x2B333C`. The default value for the Spark theme is `0x000000`. | ListBase
|  | themeColor | Type: uint Format: Color CSS Inheritance: yes Theme: halo Theme color of a component. | UIComponent
|  | top | Type: String CSS Inheritance: no The vertical distance, in pixels, from the top edge of the component to the top edge of its parent container's content area. | UIComponent
|  | useRollOver | Type: Boolean CSS Inheritance: no A flag that controls whether items are highlighted as the mouse rolls over them. If `true`, rows are highlighted as the mouse rolls over them. If `false`, rows are highlighted only when selected. The default value is`true`. | ListBase
|  | verticalAlign | Type: String CSS Inheritance: no The vertical alignment of a renderer in a row. Possible values are `"top"`, `"middle"`, and `"bottom"`. The DataGrid positions the renderers in a row based on this style and the `paddingTop` and `paddingBottom` styles. if the item in the columns for a row have different heights Other list classes do not use `verticalAlign` but the item renderers can examine this style property and adjust their layout based on it. The default value is`"top"`. | ListBase
|  | verticalCenter | Type: String CSS Inheritance: no The vertical distance in pixels from the center of the component's content area to the center of the component. | UIComponent
|  | verticalScrollBarStyleName | Type: String CSS Inheritance: no Style name for vertical scrollbar. | ScrollControlBase

Effects
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| Effect | Description | Defined By
--- | --- | --- | ---
|  | addedEffect | Triggering Event: added Played when the component is added as a child to a Container. | UIComponent
|  | creationCompleteEffect | Triggering Event: creationComplete Played when the component is created. | UIComponent
|  | focusInEffect | Triggering Event: focusIn Played when the component gains keyboard focus. | UIComponent
|  | focusOutEffect | Triggering Event: focusOut Played when the component loses keyboard focus. | UIComponent
|  | hideEffect | Triggering Event: hide Played when the component becomes invisible. | UIComponent
|  | mouseDownEffect | Triggering Event: mouseDown Played when the user presses the mouse button while over the component. | UIComponent
|  | mouseUpEffect | Triggering Event: mouseUp Played when the user releases the mouse button while over the component. | UIComponent
|  | moveEffect | Triggering Event: move Played when the component is moved. | UIComponent
|  | removedEffect | Triggering Event: removed Played when the component is removed from a Container. | UIComponent
|  | resizeEffect | Triggering Event: resize Played when the component is resized. | UIComponent
|  | rollOutEffect | Triggering Event: rollOut Played when the user rolls the mouse so it is no longer over the component. | UIComponent
|  | rollOverEffect | Triggering Event: rollOver Played when the user rolls the mouse over the component. | UIComponent
|  | showEffect | Triggering Event: show Played when the component becomes visible. | UIComponent

Public Constants
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| Constant | Defined By
--- | --- | ---
|  | DEFAULT_MAX_HEIGHT : Number = 10000 [static] The default value for the maxHeight property. | UIComponent
|  | DEFAULT_MAX_WIDTH : Number = 10000 [static] The default value for the maxWidth property. | UIComponent
|  | DEFAULT_MEASURED_HEIGHT : Number = 22 [static] The default value for the measuredHeight property. | UIComponent
|  | DEFAULT_MEASURED_MIN_HEIGHT : Number = 22 [static] The default value for the measuredMinHeight property. | UIComponent
|  | DEFAULT_MEASURED_MIN_WIDTH : Number = 40 [static] The default value for the measuredMinWidth property. | UIComponent
|  | DEFAULT_MEASURED_WIDTH : Number = 160 [static] The default value for the measuredWidth property. | UIComponent

Property Detail

actualCollection | property

`protected var actualCollection:ICollectionView`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A copy of the value normally stored in `collection` used while running data changes effects. This value should be null when a data change effect is not running.

actualIterator | property |

`protected var actualIterator:IViewCursor`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A copy of the value normally stored in `iterator` used while running data changes effects.

allowDragSelection | property |

`public var allowDragSelection:Boolean = false`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether drag-selection is enabled. Drag-Selection is the ability to select an item by dragging into it as opposed to normal selection where you can't have the mouse button down when you mouse over the item you want to select. This feature is used in ComboBox dropdowns to support pressing the mouse button when the mouse is over the dropdown button then dragging the mouse into the dropdown to select an item.

The default value is `false`.

allowItemSizeChangeNotification | property |

`allowItemSizeChangeNotification:Boolean` [write-only]

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

If false, renderers cannot invalidate size of List.

Implementation
`protected function set allowItemSizeChangeNotification(value:Boolean):void`

allowMultipleSelection | property |

`allowMultipleSelection:Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether you can allow more than one item to be selected at the same time. If `true`, users can select multiple items. There is no option to disallow discontiguous selection. Standard complex selection options are always in effect (Shift-click, Ctrl-click).

The default value is `false`.

Implementation
`public function get allowMultipleSelection():Boolean`
`public function set allowMultipleSelection(value:Boolean):void`

anchorBookmark | property |

`protected var anchorBookmark:CursorBookmark`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A bookmark to the item that is the anchor. A bookmark allows the component to quickly seek to a position in the collection of items. This property is used when selecting a set of items between the anchor and the caret or highlighted item, and when finding the selected item after a Sort or Filter is applied.

anchorIndex | property |

`protected var anchorIndex:int = -1`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The offset of the item in the data provider that is the selection anchor point.

cachedItemsChangeEffect | property |

`protected var cachedItemsChangeEffect:IEffect = null`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The effect that plays when changes occur in the data provider for the control, set through the itemsChangeEffect style.

caretBookmark | property |

`protected var caretBookmark:CursorBookmark`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A bookmark to the item under the caret. A bookmark allows the component to quickly seek to a position in the collection of items.

caretIndex | property |

`protected var caretIndex:int = -1`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The offset of the item in the data provider that is the selection caret point.

See also

mx.controls.listClasses.ListBase.caretItemRenderer

caretIndicator | property |

`protected var caretIndicator:Sprite`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The DisplayObject that contains the graphics that indicate which renderer is the caret.

caretItemRenderer | property |

`protected var caretItemRenderer:IListItemRenderer`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The renderer for the item under the caret. In the selection model, there is an anchor, a caret and a highlighted item. When the mouse is being used for selection, the item under the mouse is highlighted as the mouse rolls over the item. When the mouse is clicked with no modifier keys (Shift or Ctrl), the set of selected items is cleared and the item under the highlight is selected and becomes the anchor. The caret is unused in mouse selection. If there is an anchor and another item is selected while using the Shift key, the old set of selected items is cleared, and all items between the item and the anchor are selected. Clicking items while using the Ctrl key toggles the selection of individual items and does not move the anchor.

When selecting items using the keyboard, if the arrow keys are used with no modifier keys, the old selection is cleared and the new item is selected and becomes the anchor and the caret, and a caret indicator is shown around the selection highlight. If the user uses arrow keys with the Shift key, the old selection is cleared and the items between the anchor and the new item are selected. The caret moves to the new item. If arrow keys are used with the Ctrl key, just the caret moves. The user can use the Space key to toggle selection of the item under the caret.

caretUID | property |

`protected var caretUID:String`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The UID of the item under the caret.

collection | property |

`protected var collection:ICollectionView`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

An ICollectionView that represents the data provider. When you set the `dataProvider` property, Flex wraps the data provider as necessary to support the ICollectionView interface and sets this property to the result. The ListBase class then uses this property to access data in the provider. When you get the `dataProvider` property, Flex returns this value.

columnCount | property |

`columnCount:int`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The number of columns to be displayed in a TileList control or items in a HorizontalList control. For the DataGrid it is the number of visible columns. Note: Setting this property has no effect on a DataGrid control, which bases the number of columns on the control width and the individual column widths.

The default value is `4`.

Implementation
`public function get columnCount():int`
`public function set columnCount(value:int):void`

columnWidth | property |

`columnWidth:Number`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The width of the control's columns. This property is used by TileList and HorizontalList controls; It has no effect on DataGrid controls, where you set the individual DataGridColumn widths.

The default value is `50`.

Implementation
`public function get columnWidth():Number`
`public function set columnWidth(value:Number):void`

data | property |

`data:Object`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The item in the data provider this component should render when this component is used as an item renderer or item editor. The list class sets this property on each renderer or editor and the component displays the data. ListBase-derived classes support this property for complex situations like having a List of DataGrids or a DataGrid where one column is a List.

The list classes use the `listData` property in addition to the `data` property to determine what to display. If the list class is in a DataGrid it expects the `dataField` property of the column to map to a property in the data and sets `selectedItem` value to that property. If it is in a List or TileList control, it expects the `labelField` property of the list to map to a property in the data, and sets `selectedItem` value to that property. Otherwise it sets the `selectedItem` to the data itself.

This property uses the data provider but does not set it. In all cases, you must set the data provider in some other way.

You do not set this property in MXML.

This property can be used as the source for data binding.

Implementation
`public function get data():Object`
`public function set data(value:Object):void`

See also

mx.core.IDataRenderer

dataEffectCompleted | property |

`protected var dataEffectCompleted:Boolean = false`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates that the a data change effect has just completed. The component usually responds by cleaning up various internal data structures on the next `updateDisplayList()` call.

dataItemWrappersByRenderer | property |

`protected var dataItemWrappersByRenderer:Dictionary`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A dictionary mapping item renderers to the ItemWrappers used to supply their data. Only applicable if a data effect is running.

dataProvider | property |

`dataProvider:Object`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Set of data to be viewed. This property lets you use most types of objects as data providers. If you set the `dataProvider` property to an Array, it will be converted to an ArrayCollection. If you set the property to an XML object, it will be converted into an XMLListCollection with only one item. If you set the property to an XMLList, it will be converted to an XMLListCollection. If you set the property to an object that implements the IList or ICollectionView interface, the object will be used directly.

As a consequence of the conversions, when you get the `dataProvider` property, it will always be an ICollectionView, and therefore not necessarily be the type of object you used to you set the property. This behavior is important to understand if you want to modify the data in the data provider: changes to the original data may not be detected, but changes to the ICollectionView object that you get back from the `dataProvider` property will be detected.

The default value is `null`.

This property can be used as the source for data binding.

Implementation
`public function get dataProvider():Object`
`public function set dataProvider(value:Object):void`

See also

mx.collections.ICollectionView

dataTipField | property |

`dataTipField:String`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Name of the field in the data provider items to display as the data tip. By default, the list looks for a property named `label` on each item and displays it. However, if the data objects do not contain a `label` property, you can set the `dataTipField` property to use a different property in the data object. An example would be "FullName" when viewing a set of people's names retrieved from a database.

The default value is `null`.

This property can be used as the source for data binding.

Implementation
`public function get dataTipField():String`
`public function set dataTipField(value:String):void`

dataTipFunction | property |

`dataTipFunction:Function`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

User-supplied function to run on each item to determine its dataTip. By default, the list looks for a property named `label` on each data provider item and displays it. However, some items do not have a `label` property nor do they have another property that can be used for displaying in the rows. An example is a data set that has lastName and firstName fields, but you want to display full names. You can supply a `dataTipFunction` that finds the appropriate fields and return a displayable string. The `dataTipFunction` is also good for handling formatting and localization.

The dataTipFunction takes a single argument which is the item in the data provider and returns a String, as the following example shows:

    myDataTipFunction(item:Object):String

The default value is `null`.

This property can be used as the source for data binding.

Implementation
`public function get dataTipFunction():Function`
`public function set dataTipFunction(value:Function):void`

defaultColumnCount | property |

`protected var defaultColumnCount:int = 4`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The default number of columns to display. This value is used if the calculation for the number of columns results in a value less than 1 when trying to calculate the columnCount based on size or content.

The default value is `4`.

defaultRowCount | property |

`protected var defaultRowCount:int = 4`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The default number of rows to display. This value is used if the calculation for the number of columns results in a value less than 1 when trying to calculate the rowCount based on size or content.

The default value is `4`.

dragEnabled | property |

`dragEnabled:Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether you can drag items out of this control and drop them on other controls. If `true`, dragging is enabled for the control. If the `dropEnabled` property is also `true`, you can drag items and drop them within this control to reorder the items.

The default value is `false`.

Implementation
`public function get dragEnabled():Boolean`
`public function set dragEnabled(value:Boolean):void`

dragImage | property |

`dragImage:IUIComponent` [read-only]

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Gets an instance of a class that displays the visuals during a drag and drop operation.

The default value is `mx.controls.listClasses.ListItemDragProxy`.

Implementation
`protected function get dragImage():IUIComponent`

dragImageOffsets | property |

`dragImageOffsets:Point` [read-only]

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Gets the offset of the drag image for drag and drop.

Implementation
`protected function get dragImageOffsets():Point`

dragMoveEnabled | property |

`dragMoveEnabled:Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether items can be moved instead of just copied from the control as part of a drag-and-drop operation. If `true`, and the `dragEnabled` property is `true`, items can be moved. Often the data provider cannot or should not have items removed from it, so a MOVE operation should not be allowed during drag-and-drop.

The default value is `false`.

Implementation
`public function get dragMoveEnabled():Boolean`
`public function set dragMoveEnabled(value:Boolean):void`

dropEnabled | property |

`dropEnabled:Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether dragged items can be dropped onto the control.

If you set this property to `true`, the control accepts all data formats, and assumes that the dragged data matches the format of the data in the data provider. If you want to explicitly check the data format of the data being dragged, you must handle one or more of the drag events, such as `dragOver`, and call the DragEvent's `preventDefault()` method to customize the way the list class accepts dropped data.

When you set `dropEnabled` to `true`, Flex automatically calls the `showDropFeedback()` and `hideDropFeedback()` methods to display the drop indicator.

The default value is `false`.

Implementation
`public function get dropEnabled():Boolean`
`public function set dropEnabled(value:Boolean):void`

explicitColumnCount | property |

`protected var explicitColumnCount:int = -1`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The column count requested by explicitly setting the `columnCount` property.

explicitColumnWidth | property |

`protected var explicitColumnWidth:Number`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The column width requested by explicitly setting the `columnWidth`.

explicitRowCount | property |

`protected var explicitRowCount:int = -1`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The row count requested by explicitly setting `rowCount`.

explicitRowHeight | property |

`protected var explicitRowHeight:Number`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The row height requested by explicitly setting `rowHeight`.

factoryMap | property |

`protected var factoryMap:Dictionary`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A map of item renderers by factory. This property is a Dictionary indexed by itemRenderers where the values are IFactory.

freeItemRenderers | property |

`protected var freeItemRenderers:Array`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A stack of unused item renderers. Most list classes recycle renderers they've already created as they scroll out of the displayable area; doing so saves time during scrolling. The recycled renderers are stored here.

freeItemRenderersByFactory | property |

`protected var freeItemRenderersByFactory:Dictionary`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A map of free item renderers by factory. This property is a Dictionary indexed by factories where the values are Dictionaries of itemRenderers.

highlightIndicator | property |

`protected var highlightIndicator:Sprite`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The DisplayObject that contains the graphics that indicates which renderer is highlighted.

highlightItemRenderer | property |

`protected var highlightItemRenderer:IListItemRenderer`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The renderer that is currently rolled over or under the caret.

highlightUID | property |

`protected var highlightUID:String`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The UID of the item that is current rolled over or under the caret.

iconField | property |

`iconField:String`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The name of the field in the data provider object that determines what to display as the icon. By default, the list class does not try to display icons with the text in the rows. However, by specifying an icon field, you can specify a graphic that is created and displayed as an icon in the row. This property is ignored by DataGrid.

The renderers will look in the data provider object for a property of the name supplied as the iconField. If the value of the property is a Class, it will instantiate that class and expect it to be an instance of an IFlexDisplayObject. If the value of the property is a String, it will look to see if a Class exists with that name in the application, and if it can't find one, it will also look for a property on the document with that name and expect that property to map to a Class.

The default value is `null`.

This property can be used as the source for data binding.

Implementation
`public function get iconField():String`
`public function set iconField(value:String):void`

iconFunction | property |

`iconFunction:Function`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A user-supplied function to run on each item to determine its icon. By default the list does not try to display icons with the text in the rows. However, by specifying an icon function, you can specify a Class for a graphic that will be created and displayed as an icon in the row. This property is ignored by DataGrid.

The iconFunction takes a single argument which is the item in the data provider and returns a Class, as the following example shows:

    iconFunction(item:Object):Class

The default value is `null`.

This property can be used as the source for data binding.

Implementation
`public function get iconFunction():Function`
`public function set iconFunction(value:Function):void`

itemRenderer | property |

`itemRenderer:IFactory`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The custom item renderer for the control. You can specify a drop-in, inline, or custom item renderer.

The default item renderer depends on the component class. The TileList and HorizontalList class use TileListItemRenderer, The List class uses ListItemRenderer. The DataGrid class uses DataGridItemRenderer from DataGridColumn.

Implementation
`public function get itemRenderer():IFactory`
`public function set itemRenderer(value:IFactory):void`

itemsNeedMeasurement | property |

`protected var itemsNeedMeasurement:Boolean = true`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether the `columnWidth` and `rowHeight` properties need to be calculated. This property is set if a style changes that can affect the measurements of the renderer, or if the data provider is changed.

itemsSizeChanged | property |

`protected var itemsSizeChanged:Boolean = false`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates that the size of the renderers may have changed. The component usually responds by re-applying the data items to all of the renderers on the next `updateDisplayList()` call. There is an assumption that re-applying the items will invalidate the item renderers and cause them to re-measure.

iterator | property |

`protected var iterator:IViewCursor`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The main IViewCursor used to fetch items from the data provider and pass the items to the renderers. At the end of any sequence of code, it must always be positioned at the topmost visible item being displayed.

iteratorValid | property |

`protected var iteratorValid:Boolean = true`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates that a page fault as occurred and that the iterator's position is not valid (not positioned at the topmost item being displayed). If the component gets a page fault (an ItemPending error), it sets `iteratorValid` to `false`. Code that normally handles the rendering of items checks this flag and does not run until the page of data comes in from the server.

keySelectionPending | property |

`protected var keySelectionPending:Boolean = false`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates if keyboard selection was interrupted by a page fault. The component responds by suspending the rendering of items until the page of data arrives. The `finishKeySelection()` method will be called when the paged data arrives.

labelField | property |

`labelField:String`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The name of the field in the data provider items to display as the label. By default the list looks for a property named `label` on each item and displays it. However, if the data objects do not contain a `label` property, you can set the `labelField` property to use a different property in the data object. An example would be "FullName" when viewing a set of people names fetched from a database.

The default value is `"label"`.

This property can be used as the source for data binding.

Implementation
`public function get labelField():String`
`public function set labelField(value:String):void`

labelFunction | property |

`labelFunction:Function`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A user-supplied function to run on each item to determine its label. By default, the list looks for a property named `label` on each data provider item and displays it. However, some data sets do not have a `label` property nor do they have another property that can be used for displaying. An example is a data set that has lastName and firstName fields but you want to display full names.

You can supply a `labelFunction` that finds the appropriate fields and returns a displayable string. The `labelFunction` is also good for handling formatting and localization.

For most components, the label function takes a single argument which is the item in the data provider and returns a String.

          myLabelFunction(item:Object):String

The method signature for the DataGrid and DataGridColumn classes is:

          myLabelFunction(item:Object, column:DataGridColumn):String

where `item` contains the DataGrid item object, and `column` specifies the DataGrid column.

The default value is `null`.

This property can be used as the source for data binding.

Implementation
`public function get labelFunction():Function`
`public function set labelFunction(value:Function):void`

lastDropIndex | property |

`protected var lastDropIndex:int`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The most recently calculated index where the drag item should be added to the drop target.

lastSeekPending | property |

`protected var lastSeekPending:ListBaseSeekPending`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The most recent seek that caused a page fault. If there are multiple page faults, only the most recent one is of interest, as that is where to position the iterator and start rendering rows again.

listContent | property |

`protected var listContent:ListBaseContentHolder`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

An internal display object that parents all of the item renderers, selection and highlighting indicators and other supporting graphics. This is roughly equivalent to the `contentPane` in the Container class, and is used for managing scrolling.

listContentStyleFilters | property |

`listContentStyleFilters:Object` [read-only]

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The set of styles to pass from the ListBase to the listContent.

Implementation
`protected function get listContentStyleFilters():Object`

See also

mx.styles.StyleProxy

listData | property |

`listData:BaseListData`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

When a component is used as a drop-in item renderer or drop-in item editor, Flex initializes the `listData` property of the component with the additional data from the list control. The component can then use the `listData` property and the `data` property to display the appropriate information as a drop-in item renderer or drop-in item editor.

You do not set this property in MXML or ActionScript; Flex sets it when the component is used as a drop-in item renderer or drop-in item editor.

This property can be used as the source for data binding.

Implementation
`public function get listData():BaseListData`
`public function set listData(value:BaseListData):void`

See also

mx.controls.listClasses.IDropInListItemRenderer

listItems | property |

`listItems:Array` [read-only]

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

An Array of Arrays that contains the itemRenderer instances that render each data provider item. This is a two-dimensional row major array (array of rows that are arrays of columns).

Implementation
`protected function get listItems():Array`

menuSelectionMode | property |

`public var menuSelectionMode:Boolean = false`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether menu-style selection should be used. In a Menu, dragging from one renderer into another selects the new one and un-selects the old.

modifiedCollectionView | property |

`protected var modifiedCollectionView:ModifiedCollectionView`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The collection view that temporarily preserves previous data provider state to facilitate running data change effects.

nullItemRenderer | property |

`nullItemRenderer:IFactory`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The custom item renderer for the control. You can specify a drop-in, inline, or custom item renderer.

The default item renderer depends on the component class. The TileList and HorizontalList class use TileListItemRenderer, The List class uses ListItemRenderer. The DataGrid class uses DataGridItemRenderer from DataGridColumn.

Implementation
`public function get nullItemRenderer():IFactory`
`public function set nullItemRenderer(value:IFactory):void`

offscreenExtraColumns | property |

`protected var offscreenExtraColumns:int = 0`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The target number of extra columns of item renderers used in the layout of the control. Half of these columns are created to the left of the visible onscreen columns; half are created to the right. Typically this property will be set indirectly when you set the `offscreenExtraRowsOrColumns` property.

The default value is `0`.

offscreenExtraColumnsLeft | property |

`protected var offscreenExtraColumnsLeft:int = 0`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The number of offscreen columns currently to the left of the leftmost visible column. This value will be <= `offscreenExtraColumns` / 2.

The default value is `0`.

offscreenExtraColumnsRight | property |

`protected var offscreenExtraColumnsRight:int = 0`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The number of offscreen columns currently to the right of the right visible column. This value will be <= `offscreenExtraColumns` / 2.

The default value is `0`.

offscreenExtraRows | property |

`protected var offscreenExtraRows:int = 0`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The target number of extra rows of item renderers to be used in the layout of the control. Half of these rows are created above the visible onscreen rows; half are created below. Typically this property is set indirectly when you set the `offscreenExtraRowsOrColumns` property.

The default value is `0`.

offscreenExtraRowsBottom | property |

`protected var offscreenExtraRowsBottom:int = 0`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The number of offscreen rows currently below the bottom visible item renderer. This value will be <= `offscreenExtraRows` / 2.

The default value is `0`.

offscreenExtraRowsOrColumns | property |

`offscreenExtraRowsOrColumns:int`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The target number of extra rows or columns of item renderers to be used in the layout of the control. Half of these rows/columns are created above or to the left of the visible onscreen rows/columns; half are created below or to the right.

Whether rows or columns are created is dependent on the control and its properties. Generally rows will be used, except for TileBase components where `direction` is set to `TileBaseDirection.VERTICAL`. In that case, columns are created.

You set this property to a non-zero value primarily when applying data effects to the List or TileList controls. Changes that affect the data provider element corresponding to the currently visible items, or changes that affect the data provider element for the specified number of items before or after the visible items, trigger the data effect. Data provider elements outside this range may not be animated perfectly by the data effect.

This property is useful because data effects work by first determining a 'before' layout of the list-based control, then determining an 'after' layout, and finally setting the properties of the effect to create an animation from the before layout to the after layout. Since many effects cause currently invisible items to become visible, or currently visible items to become invisible, this property configures the control to create the offscreen item renderers so that they already exist when the data effect plays.

A reasonable value for this property might be the number of rows visible onscreen. Setting it to a very large value may cause performance problems when used with a data provider that contains a large number of elements.

The default value is `0`.

Implementation
`public function get offscreenExtraRowsOrColumns():int`
`public function set offscreenExtraRowsOrColumns(value:int):void`

offscreenExtraRowsOrColumnsChanged | property |

`protected var offscreenExtraRowsOrColumnsChanged:Boolean = false`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag indicating that the number of offscreen rows or columns may have changed.

offscreenExtraRowsTop | property |

`protected var offscreenExtraRowsTop:int = 0`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The number of offscreen rows currently above the topmost visible row. This value will be <= `offscreenExtraRows` / 2. It is used when computing the relationship of `listItems` and `rowInfo` Arrays to items in the data provider (in conjunction with `verticalScrollPosition` property).

The default value is `0`.

rendererChanged | property |

`protected var rendererChanged:Boolean = false`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates that the renderer changed. The component usually responds by destroying all existing renderers and redrawing all of the renderers on the next `updateDisplayList()` call.

reservedItemRenderers | property |

`protected var reservedItemRenderers:Object`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A hash map of currently unused item renderers that may be used again in the near future. Used when running data effects. The map is indexed by the data provider item's UID.

rowCount | property |

`rowCount:int`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Number of rows to be displayed. If the height of the component has been explicitly set, this property might not have any effect.

For a DataGrid control, the `rowCount` property does not include the header row.

The default value is `4`.

Implementation
`public function get rowCount():int`
`public function set rowCount(value:int):void`

rowHeight | property |

`rowHeight:Number`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The height of the rows in pixels. Unless the `variableRowHeight` property is `true`, all rows are the same height. If not specified, the row height is based on the font size and other properties of the renderer.

Implementation
`public function get rowHeight():Number`
`public function set rowHeight(value:Number):void`

rowInfo | property |

`rowInfo:Array` [read-only]

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

An array of ListRowInfo objects that cache row heights and other tracking information for the rows in listItems.

Implementation
`protected function get rowInfo():Array`

rowMap | property |

`protected var rowMap:Object`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A hash map of item renderers to their respective ListRowInfo object. The ListRowInfo object is indexed by the DisplayObject name of the item renderer.

runDataEffectNextUpdate | property |

`protected var runDataEffectNextUpdate:Boolean = false`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates if a data effect should be initiated the next time the display is updated.

runningDataEffect | property |

`protected var runningDataEffect:Boolean = false`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag indicating if a data change effect is currently running.

selectable | property |

`selectable:Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether the list shows selected items as selected. If `true`, the control supports selection. The Menu class, which subclasses ListBase, sets this property to `false` by default, because it doesn't show the chosen menu item as selected.

The default value is `true`.

Implementation
`public function get selectable():Boolean`
`public function set selectable(value:Boolean):void`

selectedData | property |

`protected var selectedData:Object`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A hash table of ListBaseSelectionData objects that track which items are currently selected. The table is indexed by the UID of the items.

See also

mx.controls.listClasses.ListBaseSelectionData

selectedIndex | property |

`selectedIndex:int`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The index in the data provider of the selected item.

The default value is -1 (no selected item).

This property can be used as the source for data binding.

Implementation
`public function get selectedIndex():int`
`public function set selectedIndex(value:int):void`

selectedIndices | property |

`selectedIndices:Array`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

An array of indices in the data provider of the selected items. The items are in the reverse order that the user selected the items.

The default value is `[ ]`.

This property can be used as the source for data binding.

Implementation
`public function get selectedIndices():Array`
`public function set selectedIndices(value:Array):void`

selectedItem | property |

`selectedItem:Object`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A reference to the selected item in the data provider.

The default value is `null`.

This property can be used as the source for data binding.

Implementation
`public function get selectedItem():Object`
`public function set selectedItem(value:Object):void`

selectedItems | property |

`selectedItems:Array`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

An array of references to the selected items in the data provider. The items are in the reverse order that the user selected the items.

The default value is `[ ]`.

This property can be used as the source for data binding.

Implementation
`public function get selectedItems():Array`
`public function set selectedItems(value:Array):void`

selectedItemsCompareFunction | property |

`selectedItemsCompareFunction:Function`

Language Version : | ActionScript 3.0

Product Version : | Flex 4

Runtime Versions : | Flash Player 9, AIR 1.5

A function used to compare items in the `selectedItems` property against items in the data provider. If there is a match, the item in the data provider becomes part of the selection. By default, or if `selectedItemsCompareFunction` is set to `null`, the default comparision function is used, which uses strict equality (===). Note that earlier releases of Flex used simple equality (==) so there could be behavioral differences in certain cases. A common compare function might simply compare UIDs of objects or test that a particular property matches.

The compare function takes two arguments. The first argument is the object in the data provider. The second argument is an object in `selectedItems` property. The function returns `true` if the data provider item should be selected.

          myCompareFunction(itemInDataProvider:Object, itemInSelectedItems):Boolean

The default value is `null`, which uses strict equality.

This property can be used as the source for data binding.

Implementation
`public function get selectedItemsCompareFunction():Function`
`public function set selectedItemsCompareFunction(value:Function):void`

selectionIndicators | property |

`protected var selectionIndicators:Object`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A hash table of selection indicators. This table allows the component to quickly find and remove the indicators when the set of selected items is cleared. The table is indexed by the item's UID.

selectionLayer | property |

`protected var selectionLayer:Sprite`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The layer in `listContent` where all selection and highlight indicators are drawn.

selectionTweens | property |

`protected var selectionTweens:Object`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A hash table of selection tweens. This allows the component to quickly find and clean up any tweens in progress if the set of selected items is cleared. The table is indexed by the item's UID.

showCaret | property |

`protected var showCaret:Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether to show caret. This property is usually set to `false` when mouse activity is detected and set back to `true` when the keyboard is used for selection.

showDataTips | property |

`showDataTips:Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether dataTips are displayed for text in the rows. If `true`, dataTips are displayed. DataTips are tooltips designed to show the text that is too long for the row. If you set a dataTipFunction, dataTips are shown regardless of whether the text is too long for the row.

The default value is `false`.

This property can be used as the source for data binding.

Implementation
`public function get showDataTips():Boolean`
`public function set showDataTips(value:Boolean):void`

unconstrainedRenderers | property |

`protected var unconstrainedRenderers:Dictionary`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A hash map of item renderers that are not subject to the layout algorithms of the list.

value | property |

`value:Object` [read-only]

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The selected item, or the data or label field of the selected item. If the selected item is a Number or String the value is the item. If the item is an object, the value is the data property if it exists, or the label property if it exists.

Note: Using `selectedItem` is often preferable. This property exists for backward compatibility with older applications.

This property can be used as the source for data binding.

Implementation
`public function get value():Object`

variableRowHeight | property |

`variableRowHeight:Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether the individual rows can have different height. This property is ignored by TileList and HorizontalList. If `true`, individual rows can have different height values.

The default value is `false`.

Implementation
`public function get variableRowHeight():Boolean`
`public function set variableRowHeight(value:Boolean):void`

visibleData | property |

`visibleData:Object` [read-only]

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A hash table of data provider item renderers currently in view. The table is indexed by the data provider item's UID and is used to quickly get the renderer used to display a particular item.

Implementation
`protected function get visibleData():Object`

wordWrap | property |

`wordWrap:Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether text in the row should be word wrapped. If `true`, enables word wrapping for text in the rows. Only takes effect if the `variableRowHeight` property is also `true`.

The default value is `false`.

Implementation
`public function get wordWrap():Boolean`
`public function set wordWrap(value:Boolean):void`

wordWrapChanged | property |

`protected var wordWrapChanged:Boolean = false`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

A flag that indicates whether the value of the `wordWrap` property has changed since the last time the display list was updated. This property is set when you change the `wordWrap` property value, and is reset to `false` by the `updateDisplayList()` method. The component usually responds by re-applying the data items to all of the renderers on the next `updateDisplayList()` call. This is different from itemsSizeChanged because it further indicates that re-applying the data items to the renderers may not invalidate them since the only thing that changed was whether or not the renderer should factor in wordWrap into its size calculations.

Constructor Detail

ListBase | () | Constructor

`public function ListBase()`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Constructor.

Method Detail

addDataEffectItem | () | method

`public function addDataEffectItem(item:Object):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Adds an item renderer if a data change effect is running. The item renderer should correspond to a recently added data item in the data provider's collection that isn't yet being displayed.

This function will be called by an `AddItemAction` effect as part of a data change effect to specify the point at which a data item added to a collection begins to be displayed by the control using an item renderer.

Parameters

| `item:Object` — The item renderer to add to the control's layout.

addDragData | () | method |

`protected function addDragData(dragSource:Object):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Adds the selected items to the DragSource object as part of a drag-and-drop operation. Override this method to add other data to the drag source.

Parameters

| `dragSource:Object` — The DragSource object to which to add the data.

addToFreeItemRenderers | () | method |

`protected function addToFreeItemRenderers(item:IListItemRenderer):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Adds a renderer to the recycled renderer list, making it invisible and cleaning up references to it. If a data effect is running, the renderer is reserved for future use for that data. Otherwise it is added to the general freeItemRenderers stack.

Parameters

| `item:IListItemRenderer` — The renderer to add.

addToRowArrays | () | method |

`protected function addToRowArrays():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Add a blank row to the beginning of the arrays that store references to the rows.

adjustListContent | () | method |

`protected function adjustListContent(unscaledWidth:Number = -1, unscaledHeight:Number = -1):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Called from the `updateDisplayList()` method to adjust the size and position of `listContent`.

Parameters

| `unscaledWidth:Number` (default = `-1`)`` — Specifies the width of the component, in pixels, in the component's coordinates, regardless of the value of the `scaleX` property of the component.
| `unscaledHeight:Number` (default = `-1`)`` — Specifies the height of the component, in pixels, in the component's coordinates, regardless of the value of the `scaleY` property of the component.

applySelectionEffect | () | method |

`protected function applySelectionEffect(indicator:Sprite, uid:String, itemRenderer:IListItemRenderer):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Sets up the effect for applying the selection indicator. The default is a basic alpha tween.

Parameters

| `indicator:Sprite` — A Sprite that contains the graphics depicting selection.
| `uid:String` — The UID of the item being selected which can be used to index into a table and track more than one selection effect.
| `itemRenderer:IListItemRenderer` — The item renderer that is being shown as selected.

calculateDropIndex | () | method |

`public function calculateDropIndex(event:DragEvent = null):int`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Returns the index where the dropped items should be added to the drop target.

Parameters

| `event:DragEvent` (default = `null`)`` — A DragEvent that contains information about the position of the mouse. If `null` the method should return the `dropIndex` value from the last valid event.

Returns

| `int` — Index where the dropped items should be added.

calculateDropIndicatorY | () | method |

`protected function calculateDropIndicatorY(rowCount:Number, rowNum:int):Number`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Calculates the y position of the drop indicator when performing a drag-and-drop operation.

Parameters

| `rowCount:Number` — The number of visible rows in the control.
| `rowNum:int` — The row number in the control where the drop indicator should appear.

Returns

| `Number` — The y axis coordinate of the drop indicator.

clearCaretIndicator | () | method |

`protected function clearCaretIndicator(indicator:Sprite, itemRenderer:IListItemRenderer):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Clears the caret indicator into the given Sprite.

Parameters

| `indicator:Sprite` — A Sprite that should contain the graphics for that make a renderer look highlighted.
| `itemRenderer:IListItemRenderer` — The item renderer that is being highlighted.

clearHighlightIndicator | () | method |

`protected function clearHighlightIndicator(indicator:Sprite, itemRenderer:IListItemRenderer):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Clears the highlight indicator in the given Sprite.

Parameters

| `indicator:Sprite` — A Sprite that should contain the graphics for that make a renderer look highlighted.
| `itemRenderer:IListItemRenderer` — The item renderer that is being highlighted.

clearIndicators | () | method |

`protected function clearIndicators():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Removes all selection and highlight and caret indicators.

clearSelected | () | method |

`protected function clearSelected(transition:Boolean = false):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Clears the set of selected items and removes all graphics depicting the selected state of those items.

Parameters

| `transition:Boolean` (default = `false`)`` — `true` if the graphics should have a fadeout effect.

clearVisibleData | () | method |

`protected function clearVisibleData():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Empty the visibleData hash table.

collectionChangeHandler | () | method |

`protected function collectionChangeHandler(event:Event):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles CollectionEvents dispatched from the data provider as the data changes. Updates the renderers, selected indices and scrollbars as needed.

Parameters

| `event:Event` — The CollectionEvent.

commitProperties | () | method |

`override protected function commitProperties():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Calculates the column width and row height and number of rows and columns based on whether properties like `columnCount` `columnWidth`, `rowHeight` and `rowCount` were explicitly set.

See also

mx.core.ScrollControlBase

configureScrollBars | () | method |

`protected function configureScrollBars():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Configures the ScrollBars based on the number of rows and columns and viewable rows and columns. This method is called from the `updateDisplayList()` method after the rows and columns have been updated. The method should figures out what parameters to pass into the `setScrollBarProperties()` method to properly set up the ScrollBars.

copyItemWithUID | () | method |

`protected function copyItemWithUID(item:Object):Object`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Makes a deep copy of the object by calling the `ObjectUtil.copy()` method, and replaces the copy's `uid` property (if present) with a new value by calling the `UIDUtil.createUID()` method.

This method is used for a drag and drop copy.

Parameters

| `item:Object` — The item to copy.

Returns

| `Object` — The copy of the object.

See also

mx.utils.ObjectUtil
mx.utils.UIDUtil

copySelectedItems | () | method |

`protected function copySelectedItems(useDataField:Boolean = true):Array`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Copies the selected items in the order that they were selected.

Parameters

| `useDataField:Boolean` (default = `true`)`` — `true` if the array should be filled with the actual items or `false` if the array should be filled with the indexes of the items.

Returns

| `Array` — An array of selected items.

createChildren | () | method |

`override protected function createChildren():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Creates objects that are children of this ListBase; in this case, the `listContent` object that will hold all the item renderers. The item renderers are not created immediately, but later when the `updateDisplayList()` method is called.

createItemRenderer | () | method |

`public function createItemRenderer(data:Object):IListItemRenderer`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Creates an item renderer given the data object.

Parameters

| `data:Object` — data object.

Returns

| `IListItemRenderer` — The item renderer.

destroyRow | () | method |

`protected function destroyRow(i:int, numCols:int):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Recycle a row that is no longer needed, and remove its indicators.

Parameters

| `i:int` — The index of the row to remove.
| `numCols:int` — The number of columns in the row.

dragCompleteHandler | () | method |

`protected function dragCompleteHandler(event:DragEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `DragEvent.DRAG_COMPLETE` events. This method removes the item from the data provider.

Parameters

| `event:DragEvent` — The DragEvent object.

dragDropHandler | () | method |

`protected function dragDropHandler(event:DragEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `DragEvent.DRAG_DROP events`. This method hides the drop feedback by calling the `hideDropFeedback()` method.

If the action is a `COPY`, then this method makes a deep copy of the object by calling the `ObjectUtil.copy()` method, and replaces the copy's `uid` property (if present) with a new value by calling the `UIDUtil.createUID()` method.

Parameters

| `event:DragEvent` — The DragEvent object.

See also

mx.utils.ObjectUtil
mx.utils.UIDUtil

dragEnterHandler | () | method |

`protected function dragEnterHandler(event:DragEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `DragEvent.DRAG_ENTER` events. This method determines if the DragSource object contains valid elements and uses the `showDropFeedback()` method to set up the UI feedback.

Parameters

| `event:DragEvent` — The DragEvent object.

dragExitHandler | () | method |

`protected function dragExitHandler(event:DragEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `DragEvent.DRAG_EXIT` events. This method hides the UI feeback by calling the `hideDropFeedback()` method.

Parameters

| `event:DragEvent` — The DragEvent object.

dragOverHandler | () | method |

`protected function dragOverHandler(event:DragEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `DragEvent.DRAG_OVER` events. This method determines if the DragSource object contains valid elements and uses the `showDropFeedback()` method to set up the UI feeback.

Parameters

| `event:DragEvent` — The DragEvent object.

dragScroll | () | method |

`protected function dragScroll():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Interval function that scrolls the list up or down if the mouse goes above or below the list.

dragStartHandler | () | method |

`protected function dragStartHandler(event:DragEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The default handler for the `dragStart` event.

Parameters

| `event:DragEvent` — The DragEvent object.

drawCaretIndicator | () | method |

`protected function drawCaretIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Draws the caret indicator into the given Sprite at the position, width and height specified using the color specified.

Parameters

| `indicator:Sprite` — A Sprite that should contain the graphics for that make a renderer look highlighted.
| `x:Number` — The suggested x position for the indicator.
| `y:Number` — The suggested y position for the indicator.
| `width:Number` — The suggested width for the indicator.
| `height:Number` — The suggested height for the indicator.
| `color:uint` — The suggested color for the indicator.
| `itemRenderer:IListItemRenderer` — The item renderer that is being highlighted.

drawHighlightIndicator | () | method |

`protected function drawHighlightIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Draws the highlight indicator into the given Sprite at the position, width and height specified using the color specified.

Parameters

| `indicator:Sprite` — A Sprite that should contain the graphics for that make a renderer look highlighted.
| `x:Number` — The suggested x position for the indicator.
| `y:Number` — The suggested y position for the indicator.
| `width:Number` — The suggested width for the indicator.
| `height:Number` — The suggested height for the indicator.
| `color:uint` — The suggested color for the indicator.
| `itemRenderer:IListItemRenderer` — The item renderer that is being highlighted.

drawItem | () | method |

`protected function drawItem(item:IListItemRenderer, selected:Boolean = false, highlighted:Boolean = false, caret:Boolean = false, transition:Boolean = false):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Draws the renderer with indicators that it is highlighted, selected, or the caret.

Parameters

| `item:IListItemRenderer` — The renderer.
| `selected:Boolean` (default = `false`)`` — `true` if the renderer should be drawn in its selected state.
| `highlighted:Boolean` (default = `false`)`` — `true` if the renderer should be drawn in its highlighted state.
| `caret:Boolean` (default = `false`)`` — `true` if the renderer should be drawn as if it is the selection caret.
| `transition:Boolean` (default = `false`)`` — `true` if the selection state should fade in via an effect.

drawRowBackgrounds | () | method |

`protected function drawRowBackgrounds():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Draws any alternating row colors, borders and backgrounds for the rows.

drawSelectionIndicator | () | method |

`protected function drawSelectionIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Draws the selection indicator into the given Sprite at the position, width and height specified using the color specified.

Parameters

| `indicator:Sprite` — A Sprite that should contain the graphics for that make a renderer look highlighted.
| `x:Number` — The suggested x position for the indicator.
| `y:Number` — The suggested y position for the indicator.
| `width:Number` — The suggested width for the indicator.
| `height:Number` — The suggested height for the indicator.
| `color:uint` — The suggested color for the indicator.
| `itemRenderer:IListItemRenderer` — The item renderer that is being highlighted.

findKey | () | method |

`protected function findKey(eventCode:int):Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Tries to find the next item in the data provider that starts with the character in the `eventCode` parameter. You can override this to do fancier typeahead lookups. The search starts at the `selectedIndex` location; if it reaches the end of the data provider it starts over from the beginning.

Parameters

| `eventCode:int` — The key that was pressed on the keyboard.

Returns

| `Boolean` — `true` if a match was found.

findString | () | method |

`public function findString(str:String):Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Finds an item in the list based on a String, and moves the selection to it. The search starts at the `selectedIndex` location; if it reaches the end of the data provider it starts over from the beginning.

For a DataGrid control, by default this method searches the first column in the control. To search a different column, set the `sort` property of the collection used to populate the control to the specific field or fields that you want to search. Each field corresponds to a single column of the control.

Parameters

| `str:String` — The String to match.

Returns

| `Boolean` — `true` if a match is found.

See also

mx.collections.ListCollectionView
mx.collections.ArrayCollection
mx.collections.XMLListCollection

finishDataChangeEffect | () | method |

`protected function finishDataChangeEffect(event:EffectEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Cleans up after a data change effect has finished running by restoring the original collection and iterator and removing any cached values used by the effect. This method is called by the Flex framework; you do not need to call it from your code.

Parameters

| `event:EffectEvent` — The EffectEvent.

finishKeySelection | () | method |

`protected function finishKeySelection():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Sets selected items based on the `caretIndex` and `anchorIndex` properties. Called by the keyboard selection handlers and by the `updateDisplayList()` method in case the keyboard selection handler received a page fault while scrolling to get more items.

getItemRendererFactory | () | method |

`public function getItemRendererFactory(data:Object):IFactory`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Return the appropriate factory, using the default factory if none specified.

Parameters

| `data:Object` — The data to be presented by the item renderer.

Returns

| `IFactory` — if `data` is null, the default item renderer, otherwise it returns the custom item renderer.

getRendererSemanticValue | () | method |

`public function getRendererSemanticValue(target:Object, semanticProperty:String):Object`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Returns `true` or `false` to indicates whether the effect should play on the target. The EffectTargetFilter class calls this method when you set the `filter` property on a data effect. For example, you set `filter` property to `addItem` or `removeItem`.

Parameters

| `target:Object` — An item renderer
| `semanticProperty:String` — The semantic property of the renderer whose value will be returned.

Returns

| `Object` — `true` or `false` to indicates whether the effect should play on the target.

getReservedOrFreeItemRenderer | () | method |

`protected function getReservedOrFreeItemRenderer(data:Object):IListItemRenderer`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Retrieves an already-created item renderer not currently in use. If a data effect is running, it first tries to retrieve from the reservedItemRenderers map. Otherwise (or if no reserved renderer is found) it retrieves from the freeItemRenderers stack.

Parameters

| `data:Object` — The data to be presented by the item renderer.

Returns

| `IListItemRenderer` — An already-created item renderer not currently in use.

hideDropFeedback | () | method |

`public function hideDropFeedback(event:DragEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Hides the drop indicator under the mouse pointer that indicates that a drag and drop operation is allowed.

Parameters

| `event:DragEvent` — A DragEvent object that contains information about the mouse location.

indexToColumn | () | method |

`protected function indexToColumn(index:int):int`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The column for the data provider item at the given index.

Parameters

| `index:int` — The offset into the data provider.

Returns

| `int` — The column the item would be displayed at in the component; -1 if not displayable in listContent container.

indexToItemRenderer | () | method |

`public function indexToItemRenderer(index:int):IListItemRenderer`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Get an item renderer for the index of an item in the data provider, if one exists. Because item renderers only exist for items within the set of viewable rows, you cannot use this method for items that are not visible.

Parameters

| `index:int` — The offset into the data provider for an item.

Returns

| `IListItemRenderer` — The item renderer that is displaying the item, or `null` if the item is not currently displayed.

indexToRow | () | method |

`protected function indexToRow(index:int):int`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The row for the data provider item at the given index.

Parameters

| `index:int` — The offset into the data provider.

Returns

| `int` — The row the item would be displayed at in the component; -1 if not displayable in listContent container.

indicesToIndex | () | method |

`public function indicesToIndex(rowIndex:int, colIndex:int):int`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Computes the offset into the data provider of the item at colIndex, rowIndex. The 9th row 3rd column in a TileList could be different items in the data provider based on the direction the tiles are laid out and the number of rows and columns in the TileList.

Parameters

| `rowIndex:int` — The 0-based index of the row, including rows scrolled off the top. Thus, if `verticalScrollPosition` is 2 then the first visible row has a rowIndex of 2.
| `colIndex:int` — The 0-based index of the column, including columns scrolled off the left. If `horizontalScrollPosition` is 2 then the first column on the left has a columnIndex of 2.

Returns

| `int` — The offset into the data provider.

initiateDataChangeEffect | () | method |

`protected function initiateDataChangeEffect(unscaledWidth:Number, unscaledHeight:Number):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Initiates a data change effect when there have been changes in the data provider.

Parameters

| `unscaledWidth:Number` — The width of the control before external sizings are applied.
| `unscaledHeight:Number` — The height of the control before external sizings are applied.

invalidateList | () | method |

`public function invalidateList():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Refresh all rows on the next update.

isItemHighlighted | () | method |

`public function isItemHighlighted(data:Object):Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Determines if the item renderer for a data provider item is highlighted (is rolled over via the mouse or under the caret due to keyboard navigation).

Parameters

| `data:Object` — The data provider item.

Returns

| `Boolean` — `true` if the item is highlighted.

isItemSelectable | () | method |

`public function isItemSelectable(data:Object):Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Determines if the item renderer for a data provider item is selectable.

Parameters

| `data:Object` — The data provider item.

Returns

| `Boolean` — `true` if the item is selectable.

isItemSelected | () | method |

`public function isItemSelected(data:Object):Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Determines if the item renderer for a data provider item is selected.

Parameters

| `data:Object` — The data provider item.

Returns

| `Boolean` — `true` if the item is selected.

isItemShowingCaret | () | method |

`public function isItemShowingCaret(data:Object):Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Determines if the item renderer for a data provider item is the item under the caret due to keyboard navigation.

Parameters

| `data:Object` — The data provider item.

Returns

| `Boolean` — `true` if the item under the caret

isItemVisible | () | method |

`public function isItemVisible(item:Object):Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Determines if an item is being displayed by a renderer.

Parameters

| `item:Object` — A data provider item.

Returns

| `Boolean` — `true` if the item is being displayed.

isRendererUnconstrained | () | method |

`protected function isRendererUnconstrained(item:Object):Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Returns `true` if an item renderer is no longer being positioned by the list's layout algorithm while a data change effect is running as a result of a call to the `unconstrainRenderer()` method.

Parameters

| `item:Object` — An item renderer.

Returns

| `Boolean` — `true` if an item renderer is no longer being positioned by the list's layout algorithm.

itemRendererContains | () | method |

`public function itemRendererContains(renderer:IListItemRenderer, object:DisplayObject):Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Determines whether a renderer contains (or owns) a display object. Ownership means that the display object isn't actually parented by the renderer but is associated with it in some way. Popups should be owned by the renderers so that activity in the popup is associated with the renderer and not seen as activity in another component.

Parameters

| `renderer:IListItemRenderer` — The renderer that might contain or own the display object.
| `object:DisplayObject` — The display object that might be associated with the renderer.

Returns

| `Boolean` — `true` if the display object is contained or owned by the renderer.

itemRendererToIndex | () | method |

`public function itemRendererToIndex(itemRenderer:IListItemRenderer):int`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Returns the index of the item in the data provider of the item being rendered by this item renderer. Because item renderers only exist for items that are within the set of viewable rows, you cannot use this method for items that are not visible.

Parameters

| `itemRenderer:IListItemRenderer` — The item renderer that is displaying the item for which you want to know the data provider index.

Returns

| `int` — The index of the item in the data provider.

itemRendererToIndices | () | method |

`protected function itemRendererToIndices(item:IListItemRenderer):Point`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Returns a Point containing the columnIndex and rowIndex of an item renderer. Because item renderers are only created for items within the set of viewable rows, you cannot use this method to get the indices for items that are not visible. Also note that item renderers are recycled so the indices you get for an item may change if that item renderer is reused to display a different item. Usually, this method is called during mouse and keyboard handling when the set of data displayed by the item renderers hasn't yet changed.

Parameters

| `item:IListItemRenderer` — An item renderer.

Returns

| `Point` — A Point. The `x` property is the columnIndex and the `y` property is the rowIndex.

itemToDataTip | () | method |

`public function itemToDataTip(data:Object):String`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Returns the dataTip string the renderer would display for the given data object based on the dataTipField and dataTipFunction properties. If the method cannot convert the parameter to a string, it returns a single space.

For use by developers creating subclasses of ListBase or its children. Not used by application developers.

Parameters

| `data:Object` — Object to be rendered.

Returns

| `String` — String displayable string based on the data.

itemToIcon | () | method |

`public function itemToIcon(data:Object):Class`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Returns the class for an icon, if any, for a data item, based on the iconField and iconFunction properties. The field in the item can return a string as long as that string represents the name of a class in the application. The field in the item can also be a string that is the name of a variable in the document that holds the class for the icon.

Parameters

| `data:Object` — The item from which to extract the icon class.

Returns

| `Class` — The icon for the item, as a class reference or `null` if none.

itemToItemRenderer | () | method |

`public function itemToItemRenderer(item:Object):IListItemRenderer`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Returns the item renderer for a given item in the data provider, if there is one. Since item renderers only exist for items that are within the set of viewable rows, this method returns `null` if the item is not visible. For DataGrid, this will return the first column's renderer.

Parameters

| `item:Object` — The data provider item.

Returns

| `IListItemRenderer` — The item renderer or `null` if the item is not currently displayed.

itemToLabel | () | method |

`public function itemToLabel(data:Object):String`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Returns the string the renderer would display for the given data object based on the labelField and labelFunction properties. If the method cannot convert the parameter to a string, it returns a single space.

Parameters

| `data:Object` — Object to be rendered.

Returns

| `String` — The string to be displayed based on the data.

itemToUID | () | method |

`protected function itemToUID(data:Object):String`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Determines the UID for a data provider item. All items in a data provider must either have a unique ID (UID) or one will be generated and associated with it. This means that you cannot have an object or scalar value appear twice in a data provider.

For example, the following data provider is not supported because the value "foo" appears twice and the UID for a string is the string itself:

    var sampleDP:Array = ["foo", "bar", "foo"]

Simple dynamic objects can appear twice if they are two separate instances. The following is supported because each of the instances will be given a different UID because they are different objects:

    var sampleDP:Array = [{label: "foo"}, {label: "foo"}]

Note that the following is not supported because the same instance appears twice.

          var foo:Object = {label: "foo"};
          sampleDP:Array = [foo, foo];

Parameters

| `data:Object` — The data provider item.

Returns

| `String` — The UID as a string.

makeRowsAndColumns | () | method |

`protected function makeRowsAndColumns(left:Number, top:Number, right:Number, bottom:Number, firstColumn:int, firstRow:int, byCount:Boolean = false, rowsNeeded:uint = 0):Point`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Make enough rows and columns to fill the area described by left, top, right, bottom. Renderers are created and inserted into the `listItems` array starting at `(firstColumn, firstRow)(` and moving downwards.

If `byCount` and `rowsNeeded` are specified, then just make that many rows and ignore the `bottom` and `right` parameters.

Parameters

| `left:Number` — Horizontal pixel offset of area to fill.
| `top:Number` — Vertical pixel offset of area to fill.
| `right:Number` — Horizontal pixel offset of area to fill (from left side of component).
| `bottom:Number` — Vertical pixel offset of area to fill (from top of component).
| `firstColumn:int` — Offset into `listItems` to store the first renderer to be created.
| `firstRow:int` — Offset into `listItems` to store the first renderer to be created.
| `byCount:Boolean` (default = `false`)`` — If true, make `rowsNeeded` number of rows and ignore `bottom` parameter.
| `rowsNeeded:uint` (default = `0`)`` — Number of rows to create if `byCount` is true.

Returns

| `Point` — A Point containing the number of rows and columns created.

measure | () | method |

`override protected function measure():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Calculates the measured width and height of the component based on the `rowCount`, `columnCount`, `rowHeight` and `columnWidth` properties.

See also

mx.core.ScrollControlBase

measureHeightOfItems | () | method |

`public function measureHeightOfItems(index:int = -1, count:int = 0):Number`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Measures a set of items from the data provider using the current item renderer and returns the sum of the heights of those items.

This method is not implemented in the ListBase class and must be implemented in the child class.

A negative `index` value can be used to specify that the height calculation includes any headers.

Parameters

| `index:int` (default = `-1`)`` — The data provider item at which to start calculating the height.
| `count:int` (default = `0`)`` — The number of items to use in calculating the height.

Returns

| `Number` — the sum of the height of the measured items.

measureWidthOfItems | () | method |

`public function measureWidthOfItems(index:int = -1, count:int = 0):Number`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Measures a set of items from the data provider using the current item renderer and returns the maximum width found. This method is used to calculate the width of the component. The various ListBase-derived classes have slightly different implementations. DataGrid measures its columns instead of data provider items, and TileList just measures the first item and assumes all items are the same size.

This method is not implemented in the ListBase class and must be implemented in the child class.

A negative `index` value can be used to specify that the width calculation includes any headers.

Parameters

| `index:int` (default = `-1`)`` — The data provider item at which to start measuring the width.
| `count:int` (default = `0`)`` — The number of items to measure in calculating the width.

Returns

| `Number` — The widest of the measured items.

mouseClickHandler | () | method |

`protected function mouseClickHandler(event:MouseEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `MouseEvent.MOUSE_CLICK` events from any mouse targets contained in the list including the renderers. This method determines which renderer was clicked and dispatches a `ListEvent.ITEM_CLICK` event.

Parameters

| `event:MouseEvent` — The MouseEvent object.

mouseDoubleClickHandler | () | method |

`protected function mouseDoubleClickHandler(event:MouseEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `MouseEvent.MOUSE_DOUBLE_CLICK` events from any mouse targets contained in the list including the renderers. This method determines which renderer was clicked and dispatches a `ListEvent.ITEM_DOUBLE_CLICK` event.

Parameters

| `event:MouseEvent` — The MouseEvent object.

mouseDownHandler | () | method |

`protected function mouseDownHandler(event:MouseEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `MouseEvent.MOUSE_DOWN` events from any mouse targets contained in the list including the renderers. This method finds the renderer that was pressed and prepares to receive a `MouseEvent.MOUSE_UP` event.

Parameters

| `event:MouseEvent` — The MouseEvent object.

mouseEventToItemRenderer | () | method |

`protected function mouseEventToItemRenderer(event:MouseEvent):IListItemRenderer`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Determines which item renderer is under the mouse. Item renderers can be made of multiple mouse targets, or have visible areas that are not mouse targets. This method checks both targets and position to determine which item renderer the mouse is over from the user's perspective, which can differ from the information provided by the mouse event.

Parameters

| `event:MouseEvent` — A MouseEvent that contains the position of the mouse and the object it is over.

Returns

| `IListItemRenderer` — The item renderer the mouse is over or `null` if none.

mouseMoveHandler | () | method |

`protected function mouseMoveHandler(event:MouseEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `MouseEvent.MOUSE_MOVE` events from any mouse targets contained in the list including the renderers. This method watches for a gesture that constitutes the beginning of a drag drop and send a `DragEvent.DRAG_START` event. It also checks to see if the mouse is over a non-target area of a renderer so that Flex can try to make it look like that renderer was the target.

Parameters

| `event:MouseEvent` — The MouseEvent object.

mouseOutHandler | () | method |

`protected function mouseOutHandler(event:MouseEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `MouseEvent.MOUSE_OUT` events from any mouse targets contained in the list including the renderers. This method finds out which renderer the mouse has left and removes the highlights.

Parameters

| `event:MouseEvent` — The MouseEvent object.

mouseOverHandler | () | method |

`protected function mouseOverHandler(event:MouseEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `MouseEvent.MOUSE_OVER` events from any mouse targets contained in the list, including the renderers. This method finds out which renderer the mouse is over and shows it as highlighted.

The list classes also call this from a `MouseEvent.MOUSE_MOVE` event. This event is used to detect movement in non-target areas of the renderers and in padded areas around the renderers.

Parameters

| `event:MouseEvent` — The MouseEvent object.

mouseUpHandler | () | method |

`protected function mouseUpHandler(event:MouseEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `MouseEvent.MOUSE_DOWN` events from any mouse targets contained in the list including the renderers. This method finds the renderer that was pressed and prepares to receive a `MouseEvent.MOUSE_UP` event.

Parameters

| `event:MouseEvent` — The MouseEvent object.

mouseWheelHandler | () | method |

`override protected function mouseWheelHandler(event:MouseEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Handles `mouseWheel` events by changing scroll positions. This is a copy of the version in the ScrollControlBase class, modified to change the horizontalScrollPosition if the target is run horizontally.

Parameters

| `event:MouseEvent` — The MouseEvent object.

See also

mx.core.ScrollControlBase.mouseWheelHandler()

moveIndicatorsHorizontally | () | method |

`protected function moveIndicatorsHorizontally(uid:String, moveBlockDistance:Number):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Move the selection and highlight indicators horizontally.

Parameters

| `uid:String` — UID used to find the indicators.
| `moveBlockDistance:Number` — The distance to move horizontally.

moveIndicatorsVertically | () | method |

`protected function moveIndicatorsVertically(uid:String, moveBlockDistance:Number):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Move the selection and highlight indicators vertically.

Parameters

| `uid:String` — UID used to find the indicators.
| `moveBlockDistance:Number` — The distance to move vertically.

moveRowVertically | () | method |

`protected function moveRowVertically(i:int, numCols:int, moveBlockDistance:Number):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Move a row vertically, and update the rowInfo record.

Parameters

| `i:int` — The index of the row.
| `numCols:int` — The number of columns in the row.
| `moveBlockDistance:Number` — The distance to move.

moveSelectionHorizontally | () | method |

`protected function moveSelectionHorizontally(code:uint, shiftKey:Boolean, ctrlKey:Boolean):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Moves the selection in a horizontal direction in response to the user selecting items using the left arrow or right arrow keys and modifiers such as the Shift and Ctrl keys. This method might change the `horizontalScrollPosition`, `verticalScrollPosition`, and `caretIndex` properties, and call the `finishKeySelection()` method to update the selection.

Not implemented in ListBase because the default list is single column and therefore does not scroll horizontally.

Parameters

| `code:uint` — The key that was pressed (for example, `Keyboard.LEFT`).
| `shiftKey:Boolean` — `true` if the Shift key was held down when the keyboard key was pressed.
| `ctrlKey:Boolean` — `true` if the Ctrl key was held down when the keyboard key was pressed.

moveSelectionVertically | () | method |

`protected function moveSelectionVertically(code:uint, shiftKey:Boolean, ctrlKey:Boolean):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Moves the selection in a vertical direction in response to the user selecting items using the up arrow or down arrow Keys and modifiers such as the Shift and Ctrl keys. This method might change the `horizontalScrollPosition`, `verticalScrollPosition`, and `caretIndex` properties, and call the `finishKeySelection()` method to update the selection.

Parameters

| `code:uint` — The key that was pressed (for example, `Keyboard.DOWN`).
| `shiftKey:Boolean` — `true` if the Shift key was held down when the keyboard key was pressed.
| `ctrlKey:Boolean` — `true` if the Ctrl key was held down when the keyboard key was pressed.

prepareDataEffect | () | method |

`protected function prepareDataEffect(ce:CollectionEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Prepares the data effect for the collection event.

Parameters

| `ce:CollectionEvent` — The collection event.

purgeItemRenderers | () | method |

`protected function purgeItemRenderers():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Called by the `updateDisplayList()` method to remove existing item renderers and clean up various caching structures when the renderer changes.

reKeyVisibleData | () | method |

`protected function reKeyVisibleData():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Update the keys in the visibleData hash table.

removeDataEffectItem | () | method |

`public function removeDataEffectItem(item:Object):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Removes an item renderer if a data change effect is running. The item renderer must correspond to data that has already been removed from the data provider collection. This function will be called by a `RemoveItemAction` effect as part of a data change effect to specify the point at which a data item ceases to displayed by the control using an item renderer.

Parameters

| `item:Object` — The item renderer to remove from the control's layout.

removeFromRowArrays | () | method |

`protected function removeFromRowArrays(i:int):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Remove a row from the arrays that store references to the row.

Parameters

| `i:int` — The index of the row.

removeIndicators | () | method |

`protected function removeIndicators(uid:String):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Cleans up selection highlights and other associated graphics for a given item in the data provider.

Parameters

| `uid:String` — The UID of the data provider item.

restoreRowArrays | () | method |

`protected function restoreRowArrays(modDeltaPos:int):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Remove the requested number of rows from the beginning of the arrays that store references to the rows.

Parameters

| `modDeltaPos:int` — The number of rows to remove.

scrollHorizontally | () | method |

`protected function scrollHorizontally(pos:int, deltaPos:int, scrollUp:Boolean):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Adjusts the renderers in response to a change in scroll position.

The list classes attempt to optimize scrolling when the scroll position has changed by less than the number of visible rows. In that situation some rows are unchanged and just need to be moved, other rows are removed and then new rows are added. If the scroll position changes too much, all old rows are removed and new rows are added by calling the `makeRowsAndColumns()` method for the entire viewable area.

Not implemented in ListBase because the default list is single column and therefore doesn't scroll horizontally.

Parameters

| `pos:int` — The new scroll position.
| `deltaPos:int` — The change in position. This value is always a positive number.
| `scrollUp:Boolean` — `true` if scroll position is getting smaller.

scrollPositionToIndex | () | method |

`protected function scrollPositionToIndex(horizontalScrollPosition:int, verticalScrollPosition:int):int`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Returns the data provider index for the item at the first visible row and column for the given scroll positions.

Parameters

| `horizontalScrollPosition:int` — The `horizontalScrollPosition` property value corresponding to the scroll position.
| `verticalScrollPosition:int` — The `verticalScrollPosition` property value corresponding to the scroll position.

Returns

| `int` — The data provider index.

scrollToIndex | () | method |

`public function scrollToIndex(index:int):Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Ensures that the data provider item at the given index is visible. If the item is visible, the `verticalScrollPosition` property is left unchanged even if the item is not the first visible item. If the item is not currently visible, the `verticalScrollPosition` property is changed make the item the first visible item, unless there aren't enough rows to do so because the `verticalScrollPosition` value is limited by the `maxVerticalScrollPosition` property.

Parameters

| `index:int` — The index of the item in the data provider.

Returns

| `Boolean` — `true` if `verticalScrollPosition` changed.

scrollVertically | () | method |

`protected function scrollVertically(pos:int, deltaPos:int, scrollUp:Boolean):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Adjusts the renderers in response to a change in scroll position.

The list classes attempt to optimize scrolling when the scroll position has changed by less than the number of visible rows. In that situation some rows are unchanged and just need to be moved, other rows are removed and then new rows are added. If the scroll position changes too much, all old rows are removed and new rows are added by calling the `makeRowsAndColumns()` method for the entire viewable area.

Parameters

| `pos:int` — The new scroll position.
| `deltaPos:int` — The change in position. This value is always a positive number.
| `scrollUp:Boolean` — `true` if the scroll position is getting smaller.

seekPendingFailureHandler | () | method |

`protected function seekPendingFailureHandler(data:Object, info:ListBaseSeekPending):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The default failure handler when a seek fails due to a page fault.

Parameters

| `data:Object` — The data that caused the error.
| `info:ListBaseSeekPending` — Data about a seek operation that was interrupted by an ItemPendingError error.

seekPendingResultHandler | () | method |

`protected function seekPendingResultHandler(data:Object, info:ListBaseSeekPending):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

The default result handler when a seek fails due to a page fault. This method checks to see if it has the most recent page fault result: if not it simply exits; if it does, it sets the iterator to the correct position.

Parameters

| `data:Object` — The data that caused the error.
| `info:ListBaseSeekPending` — Data about a seek operation that was interrupted by an ItemPendingError error.

seekPositionSafely | () | method |

`protected function seekPositionSafely(index:int):Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Seek to a position, and handle an ItemPendingError if necessary.

Parameters

| `index:int` — Index into the collection.

Returns

| `Boolean` — `false` if an ItemPendingError is thrown.

selectItem | () | method |

`protected function selectItem(item:IListItemRenderer, shiftKey:Boolean, ctrlKey:Boolean, transition:Boolean = true):Boolean`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Updates the set of selected items given that the item renderer provided was clicked by the mouse and the keyboard modifiers are in the given state. This method also updates the display of the item renderers based on their updated selected state.

Parameters

| `item:IListItemRenderer` — The item renderer that was clicked.
| `shiftKey:Boolean` — `true` if the Shift key was held down when the mouse was clicked.
| `ctrlKey:Boolean` — `true` if the Ctrl key was held down when the mouse was clicked.
| `transition:Boolean` (default = `true`)`` — `true` if the graphics for the selected state should be faded in using an effect.

Returns

| `Boolean` — `true` if the set of selected items changed. Clicking on an already-selected item does not always change the set of selected items.

setRowCount | () | method |

`protected function setRowCount(v:int):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Sets the `rowCount` property without causing invalidation or setting the `explicitRowCount` property, which permanently locks in the number of rows.

Parameters

| `v:int` — The row count.

setRowHeight | () | method |

`protected function setRowHeight(v:Number):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Sets the `rowHeight` property without causing invalidation or setting of `explicitRowHeight` which permanently locks in the height of the rows.

Parameters

| `v:Number` — The row height, in pixels.

shiftRow | () | method |

`protected function shiftRow(oldIndex:int, newIndex:int, numCols:int, shiftItems:Boolean):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Shift a row in the arrays that reference rows.

Parameters

| `oldIndex:int` — Old index in the arrays.
| `newIndex:int` — New index in the arrays.
| `numCols:int` — The number of columns in the row.
| `shiftItems:Boolean` — `true` if we actually move the item. `false` if we simply change the item's rowIndex.

showDropFeedback | () | method |

`public function showDropFeedback(event:DragEvent):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Displays a drop indicator under the mouse pointer to indicate that a drag and drop operation is allowed and where the items will be dropped.

Parameters

| `event:DragEvent` — A DragEvent object that contains information as to where the mouse is.

sumRowHeights | () | method |

`protected function sumRowHeights(startRowIdx:int, endRowIdx:int):Number`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Determine the height of the requested set of rows.

Parameters

| `startRowIdx:int` — The index of first row.
| `endRowIdx:int` — The index of last row.

Returns

| `Number` — The total height of the rows.

truncateRowArrays | () | method |

`protected function truncateRowArrays(numRows:int):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Remove all remaining rows from the end of the arrays that store references to the rows.

Parameters

| `numRows:int` — The row index to truncate from.

UIDToItemRenderer | () | method |

`protected function UIDToItemRenderer(uid:String):IListItemRenderer`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Find an item renderer based on its UID if it is visible.

Parameters

| `uid:String` — The UID of the item.

Returns

| `IListItemRenderer` — The item renderer.

unconstrainRenderer | () | method |

`public function unconstrainRenderer(item:Object):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Called by an `UnconstrainItemAction` effect as part of a data change effect if the item renderers corresponding to certain data items need to move outside the normal positions of item renderers in the control. The control does not attempt to position the item render for the duration of the effect.

Parameters

| `item:Object` — The item renderer that is a target of the effect.

updateDisplayList | () | method |

`override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Adds or removes item renderers if the number of displayable items changed. Refreshes the item renderers if they might have changed. Applies the selection if it was changed programmatically.

Parameters

| `unscaledWidth:Number` — Specifies the width of the component, in pixels, in the component's coordinates, regardless of the value of the `scaleX` property of the component.
| `unscaledHeight:Number` — Specifies the height of the component, in pixels, in the component's coordinates, regardless of the value of the `scaleY` property of the component.

See also

mx.core.ScrollControlBase

updateList | () | method |

`protected function updateList():void`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Refreshes all rows. Calling this method can require substantial processing, because it completely redraws all renderers in the list and does not return until complete.

Event Detail

change | Event

Event Object Type: `mx.events.ListEvent`
ListEvent.type property = `mx.events.ListEvent.CHANGE`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Dispatched when the `selectedIndex` or `selectedItem` property changes as a result of user interaction.

The ListEvent.CHANGE constant defines the value of the `type` property of the ListEvent object for a `change` event, which indicates that selection changed as a result of user interaction.

The properties of the event object have the following values:

Property | Value
--- | ---
`bubbles` | false
`cancelable` | false
`columnIndex` | The zero-based index of the column associated with the event.
`currentTarget` | The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`itemRenderer` | The item renderer that was clicked.
`reason` | null
`rowIndex` | The zero-based index of the item associated with the event.
`target` | The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.
`Type` | ListEvent.CHANGE

dataChange | Event |

Event Object Type: `mx.events.FlexEvent`
FlexEvent.type property = `mx.events.FlexEvent.DATA_CHANGE`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Dispatched when the `data` property changes.

When you use a component as an item renderer, the `data` property contains the data to display. You can listen for this event and update the component when the `data` property changes.

The `FlexEvent.DATA_CHANGE` constant defines the value of the `type` property of the event object for a `dataChange` event.

The properties of the event object have the following values:

Property | Value
--- | ---
`bubbles` | false
`cancelable` | false
`currentTarget` | The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`target` | The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.

itemClick | Event |

Event Object Type: `mx.events.ListEvent`
ListEvent.type property = `mx.events.ListEvent.ITEM_CLICK`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Dispatched when the user clicks on an item in the control.

The ListEvent.ITEM_CLICK constant defines the value of the `type` property of the ListEvent object for an `itemClick` event, which indicates that the user clicked the mouse over a visual item in the control.

The properties of the event object have the following values:

Property | Value
--- | ---
`bubbles` | false
`cancelable` | false
`columnIndex` | The zero-based index of the column associated with the event.
`currentTarget` | The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`itemRenderer` | The item renderer that was clicked.
`reason` | null
`rowIndex` | The zero-based index of the item associated with the event.
`target` | The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.
`Type` | ListEvent.ITEM_CLICK

itemDoubleClick | Event |

Event Object Type: `mx.events.ListEvent`
ListEvent.type property = `mx.events.ListEvent.ITEM_DOUBLE_CLICK`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Dispatched when the user double-clicks on an item in the control.

The ListEvent.ITEM_DOUBLE_CLICK constant defines the value of the `type` property of the ListEvent object for an `itemDoubleClick` event, which indicates that the user double clicked the mouse over a visual item in the control.

To receive itemDoubleClick events, you must set the component's `doubleClickEnabled` property to `true`.

The properties of the event object have the following values:

Property | Value
--- | ---
`bubbles` | false
`cancelable` | false
`columnIndex` | The zero-based index of the column associated with the event.
`currentTarget` | The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`itemRenderer` | The item renderer that was double clicked.
`reason` | null
`rowIndex` | The zero-based index of the item associated with the event.
`target` | The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.
`Type` | ListEvent.ITEM_DOUBLE_CLICK

itemRollOut | Event |

Event Object Type: `mx.events.ListEvent`
ListEvent.type property = `mx.events.ListEvent.ITEM_ROLL_OUT`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Dispatched when the user rolls the mouse pointer out of an item in the control.

The ListEvent.ITEM_ROLL_OUT constant defines the value of the `type` property of the ListEvent object for an `itemRollOut` event, which indicates that the user rolled the mouse pointer out of a visual item in the control.

The properties of the event object have the following values:

Property | Value
--- | ---
`bubbles` | false
`cancelable` | false
`columnIndex` | The zero-based index of the column associated with the event.
`currentTarget` | The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`itemRenderer` | The item renderer that was rolled out.
`reason` | null
`rowIndex` | The zero-based index of the item associated with the event.
`target` | The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.
`Type` | ListEvent.ITEM_ROLL_OUT

itemRollOver | Event |

Event Object Type: `mx.events.ListEvent`
ListEvent.type property = `mx.events.ListEvent.ITEM_ROLL_OVER`

Language Version : | ActionScript 3.0

Product Version : | Flex 3

Runtime Versions : | Flash Player 9, AIR 1.1

Dispatched when the user rolls the mouse pointer over an item in the control.

The ListEvent.ITEM_ROLL_OVER constant defines the value of the `type` property of the ListEvent object for an `itemRollOver` event, which indicates that the user rolled the mouse pointer over a visual item in the control.

The properties of the event object have the following values:

Property | Value
--- | ---
`bubbles` | false
`cancelable` | false
`columnIndex` | The zero-based index of the column associated with the event.
`currentTarget` | The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`itemRenderer` | The item renderer that was rolled over.
`reason` | null
`rowIndex` | The zero-based index of the item associated with the event.
`target` | The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.
`Type` | ListEvent.ITEM_ROLL_OVER

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