| Class | Description | 
|---|---|
| DataView | 
 A DataView coordinates the asynchronous loading of WSDL WebService and XML Schema definitions in applications created by
 Visual Builder. 
 | 
| Deck | 
 A simple container that implements the policy that at most one of its contained components is visible at any given time. 
 | 
| FlowLayout | 
 Arranges a set of Canvas components into rows, flowing into available space so that different numbers of components may
 appear in each row. 
 | 
| HLayout | 
 A subclass of Layout that applies a sizing policy along the horizontal axis, interpreting  percent and "*" sizes as
 proportions of the width of the layout. 
 | 
| HStack | 
 A subclass of Layout that simply stacks members on the horizontal axis without trying to manage their width. 
 | 
| ImgSectionHeader | 
 SectionHeader class based on an HLayout with  
StretchImg background. | 
| Layout | 
 Arranges a set of "member" Canvases in horizontal or vertical stacks, applying a layout policy to determine member
 heights and widths. 
 | 
| LayoutSpacer | 
 Add a spacer to a  
Layout that takes up space just like a normal member,
 without actually drawing anything. | 
| NavigationBar | 
 Navigation control implemented as a horizontal layout showing back and forward controls  and a title. 
 | 
| NavigationBarViewState | 
 Encapsulates state of a  
NavigationBar's view. | 
| NavItem | 
 Properties for a navigation item in a  
NavPanel. | 
| NavPanel | 
 Provides a list or tree of  
navigation items, each of which specifies
 a component to be displayed in a mutually exclusive fashion in the navDeck. | 
| PortalLayout | 
 A PortalLayout is a special subclass of Layout designed to display  
Portlet
 windows. | 
| PortalPosition | 
 Represents the position of a  
Portlet within a PortalLayout, indicating the column, row, and position within the row. | 
| Portlet | 
 Custom subclass of Window configured to be embedded within a PortalLayout. 
 | 
| SectionHeader | 
 Simple SectionHeader class based on a Label with an icon, skinnable via CSS. 
 | 
| SectionStack | 
 A container that manages a list of sections of widgets, each with a header. 
 | 
| SectionStackSection | 
 Section descriptor used by a SectionStack to describe a section of items which are shown or hidden together along with
 their associated header. 
 | 
| SplitPane | 
 A device- and orientation-sensitive layout that implements the common pattern of rendering two panes side-by-side on
 desktop machines and on tablets in landscape orientation, while switching to showing a single pane for handset-sized
 devices or tablets in portrait orientation (this type of behavior is sometimes called "responsive design"). 
 | 
| VLayout | 
 A subclass of Layout that applies a sizing policy along the vertical axis, interpreting  percent and "*" sizes as
 proportions of the height of the layout. 
 | 
| VStack | 
 A subclass of Layout that simply stacks members on the vertical axis without trying to manage their height. 
 |