Documentation for classes includes syntax, usage information, and code samples for methods, properties, and event handlers and listeners for those APIs that belong to a specific class in ActionScript. The classes are listed alphabetically. If you are not sure to which class a certain method or property belongs, you can look it up in the Index.

	Class	Package	Description
	Animation	com.yahoo.astra.animation	An ultra lightweight animation engine.
	AnimationEvent	com.yahoo.astra.animation	The AnimationEvent class represents events that are broadcast by the com.yahoo.astra.animation.Animation class.
	BaseLayoutMode	com.yahoo.astra.layout.modes	Some basic properties shared by multiple ILayoutMode implementations.
	BorderConstraints	com.yahoo.astra.layout.modes	Constraint values available in BorderLayout.
	BorderLayout	com.yahoo.astra.layout.modes	Arranges a DisplayObjectContainer's children using a page-like border algorithm.
	BoxLayout	com.yahoo.astra.layout.modes	Arranges a DisplayObjectContainer's children in a single column or row.
	DisplayObjectUtil	com.yahoo.astra.utils	Utility functions for use with DisplayObjects.
	FlowLayout	com.yahoo.astra.layout.modes	Arranges a DisplayObjectContainer's children using a flow algorithm.
	HorizontalAlignment	com.yahoo.astra.layout.modes	A set of constants for horizontal alignment values used by the layout engine.
	IAdvancedLayoutMode	com.yahoo.astra.layout.modes	Defines the methods required for layout modes that have advanced configuration settings for individual children.
	ILayoutContainer	com.yahoo.astra.layout	Defines properties and methods required for layout containers to work with LayoutManager.
	ILayoutMode	com.yahoo.astra.layout.modes	Defines the properties and functions required for layout modes used by ILayoutContainer.
	LayoutContainer	com.yahoo.astra.layout	Children of this display object are subject to being positioned, and possibly resized, based on a specified layout algorithm.
	LayoutEvent	com.yahoo.astra.layout.events	Events associated with ILayoutContainer objects.
	LayoutManager	com.yahoo.astra.layout	Generic layout manager for DisplayObjects.
	LayoutModeUtil	com.yahoo.astra.layout.modes	Utility functions shared by implementations of ILayoutMode.
	NumberUtil	com.yahoo.astra.utils	A collection of utility functions for the manipulation of numeric values.
	PercentageSizeUtil	com.yahoo.astra.layout.modes	Utility functions used for determining pixel-based sizes from percentage-based sizes.
	TileLayout	com.yahoo.astra.layout.modes	Arranges a DisplayObjectContainer's children using a tiling algorithm.
	VerticalAlignment	com.yahoo.astra.layout.modes	A set of constants for vertical alignment values used by the layout engine.