| Package | Description | 
|---|---|
| com.google.gwt.user.client.ui | Widgets, Panels, and other user-interface classes. | 
| Modifier and Type | Interface and Description | 
|---|---|
| static interface  | InsertPanel.ForIsWidgetExtends this interface with convenience methods to handle  IsWidget. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AbsolutePanelAn absolute panel positions all of its children absolutely, allowing them to
 overlap. | 
| class  | CellPanelA panel whose child widgets are contained within the cells of a table. | 
| class  | ComplexPanelAbstract base class for panels that can contain multiple child widgets. | 
| class  | DeckLayoutPanelA panel that displays all of its child widgets in a 'deck', where only one
 can be visible at a time. | 
| class  | DeckPanelA panel that displays all of its child widgets in a 'deck', where only one
 can be visible at a time. | 
| class  | DecoratedStackPanel
 A  StackPanelthat wraps each item in a 2x3 grid (six box), which
 allows users to add rounded corners. | 
| class  | DecoratedTabPanelA  TabPanelthat uses aDecoratedTabBarwith rounded corners. | 
| class  | DockLayoutPanelA panel that lays its child widgets out "docked" at its outer edges, and
 allows its last widget to take up the remaining space in its center. | 
| class  | DockPanelA panel that lays its child widgets out "docked" at its outer edges, and
 allows its last widget to take up the remaining space in its center. | 
| class  | FlowPanelA panel that formats its child widgets using the default HTML layout
 behavior. | 
| class  | HorizontalPanelA panel that lays all of its widgets out in a single horizontal column. | 
| class  | HTMLPanelA panel that contains HTML, and which can attach child widgets to identified
 elements within that HTML. | 
| class  | LayoutPanel | 
| class  | RenderablePanelEXPERIMENTAL and subject to change. | 
| class  | RootLayoutPanelA singleton implementation of  LayoutPanelthat always attaches itself
 to the document body (i.e. | 
| class  | RootPanelThe panel to which all other widgets must ultimately be added. | 
| class  | SplitLayoutPanelA panel that adds user-positioned splitters between each of its child
 widgets. | 
| class  | StackLayoutPanelA panel that stacks its children vertically, displaying only one at a time,
 with a header for each child which the user can click to display. | 
| class  | StackPanelA panel that stacks its children vertically, displaying only one at a time,
 with a header for each child which the user can click to display. | 
| class  | TabLayoutPanelA panel that represents a tabbed set of pages, each of which contains another
 widget. | 
| class  | TabPanelA panel that represents a tabbed set of pages, each of which contains another
 widget. | 
| class  | VerticalPanelA panel that lays all of its widgets out in a single vertical column. |