Packagefeathers.layout
Interfacepublic interface ITrimmedVirtualLayout extends IVirtualLayout, ILayout, IFeathersEventDispatcher
Implementors HorizontalLayout, HorizontalSpinnerLayout, SlideShowLayout, VerticalLayout, VerticalSpinnerLayout

Product Version : Feathers 1.1.0

Optimizes a virtual layout by skipping a specific number of items before and after the set that is passed to layout().


Public Properties
 PropertyDefined By
  afterVirtualizedItemCount : int
Used internally by a component, such as List, to set the number of virtualized items that appear after the items passed to layout().
ITrimmedVirtualLayout
  beforeVirtualizedItemCount : int
Used internally by a component, such as List, to set the number of virtualized items that appear before the items passed to layout().
ITrimmedVirtualLayout
 InheritedrequiresLayoutOnScroll : Boolean
[read-only] Determines if the container calls layout() when the scroll position changes.
ILayout
 InheritedtypicalItem : DisplayObject
Used internally by a component that supports layout virtualization, such as List, to provide a display object with dimensions that represent a "typical" item in the layout.
IVirtualLayout
 InheriteduseVirtualLayout : Boolean
Determines if virtual layout should be used.
IVirtualLayout
Public Methods
 MethodDefined By
 Inherited
addEventListener(type:String, listener:Function):void
Adds a listener for an event type.
IFeathersEventDispatcher
 Inherited
calculateNavigationDestination(items:Vector.<DisplayObject>, index:int, keyCode:uint, bounds:LayoutBoundsResult):int
Using the current index and a key press, calculates the new index.
ILayout
 Inherited
dispatchEvent(event:Event):void
Dispatches an event to all listeners added for the specified event type.
IFeathersEventDispatcher
 Inherited
dispatchEventWith(type:String, bubbles:Boolean = false, data:Object = null):void
Dispatches an event from the pool with the specified to all listeners for the specified event type.
IFeathersEventDispatcher
 Inherited
getNearestScrollPositionForIndex(index:int, scrollX:Number, scrollY:Number, items:Vector.<DisplayObject>, x:Number, y:Number, width:Number, height:Number, result:Point = null):Point
Calculates the scroll position nearest to the current scroll position that will display the full bounds of the item within the view port.
ILayout
 Inherited
getScrollPositionForIndex(index:int, items:Vector.<DisplayObject>, x:Number, y:Number, width:Number, height:Number, result:Point = null):Point
Using the item dimensions, calculates a scroll position that will ensure that the item at a given index will be visible within the specified bounds.
ILayout
 Inherited
getVisibleIndicesAtScrollPosition(scrollX:Number, scrollY:Number, width:Number, height:Number, itemCount:int, result:Vector.<int> = null):Vector.<int>
Used internally by a component, such as List, to determines which indices are visible with the specified view port bounds and scroll position.
IVirtualLayout
 Inherited
hasEventListener(type:String, listener:Function = null):Boolean
Checks if a listener has been added for the specified event type.
IFeathersEventDispatcher
 Inherited
layout(items:Vector.<DisplayObject>, viewPortBounds:ViewPortBounds = null, result:LayoutBoundsResult = null):LayoutBoundsResult
Positions (and possibly resizes) the supplied items within the optional bounds argument.
ILayout
 Inherited
measureViewPort(itemCount:int, viewPortBounds:ViewPortBounds = null, result:Point = null):Point
Used internally by a component, such as List, to measure the view port based on the typical item dimensions or cached dimensions, if available.
IVirtualLayout
 Inherited
removeEventListener(type:String, listener:Function):void
Removes a listener for an event type.
IFeathersEventDispatcher
 Inherited
removeEventListeners(type:String = null):void
Removes all listeners for an event type.
IFeathersEventDispatcher
Property Detail
afterVirtualizedItemCountproperty
afterVirtualizedItemCount:int

Used internally by a component, such as List, to set the number of virtualized items that appear after the items passed to layout(). Allows the array of items to be smaller than the full size. Does not work if the layout has variable item dimensions.

This property is meant to be set by the List or other component that uses the virtual layout. If you're simply creating a layout for a List or another component, do not use this property. It is meant for developers creating custom components only.


Implementation
    public function get afterVirtualizedItemCount():int
    public function set afterVirtualizedItemCount(value:int):void
beforeVirtualizedItemCountproperty 
beforeVirtualizedItemCount:int

Used internally by a component, such as List, to set the number of virtualized items that appear before the items passed to layout(). Allows the array of items to be smaller than the full size. Does not work if the layout has variable item dimensions.

This property is meant to be set by the List or other component that uses the virtual layout. If you're simply creating a layout for a List or another component, do not use this property. It is meant for developers creating custom components only.


Implementation
    public function get beforeVirtualizedItemCount():int
    public function set beforeVirtualizedItemCount(value:int):void




Sat Jun 18 2022, 02:58 PM -07:00