Adobe® Flex® 4 Language Reference
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spark.core 

The spark.core package contains the Spark core classes.



Interfaces
 InterfaceDescription
 IGraphicElement The IGraphicElement is implemented by IVisualElements that take advantage of the parent Group's DisplayObject management.
 ISharedDisplayObject The ISharedDisplayObject interface defines the minimum requirements that a DisplayObject must implement to be shared between IGraphicElement objects.
 IViewport The IViewport interface is implemented by components that support a viewport.
Classes
 ClassDescription
 DisplayObjectSharingMode The DisplayObjectSharingMode class defines the possible values for the displayObjectSharingMode property of the IGraphicElement class.
 MaskType The MaskType class defines the possible values for the maskType property of the GraphicElement class.
 NavigationUnit The NavigationUnit class defines the possible values for the getVerticalScrollPositionDelta() and getHorizontalScrollPositionDelta() methods of the IViewport class.
 SpriteVisualElement The SpriteVisualElement class is a light-weight Sprite-based implemention of the IVisualElement interface.