| Package | Description | 
|---|---|
| com.google.gwt.activity.shared | Classes used to implement app navigation. | 
| com.google.gwt.canvas.client | Classes for HTML Canvas 2D support. | 
| com.google.gwt.cell.client | Standard  Cellsubclasses used by thecellviewwidgets. | 
| com.google.gwt.editor.ui.client | User interface components for the bean editor framework. | 
| com.google.gwt.editor.ui.client.adapters | User interface adapters for the bean editor framework. | 
| com.google.gwt.i18n.client | Internationalization support for GWT applications. | 
| com.google.gwt.logging.client | Log handlers and related classes for java.util.logging support in GWT. | 
| com.google.gwt.media.client | 
 Widgets for HTML Audio and Video support. | 
| com.google.gwt.touch.client | |
| com.google.gwt.user.cellview.client | The "cellview" widget set. | 
| com.google.gwt.user.client.impl | |
| com.google.gwt.user.client.ui | Widgets, Panels, and other user-interface classes. | 
| com.google.gwt.user.client.ui.impl | |
| com.google.gwt.user.datepicker.client | The date picker widget and associated types. | 
| com.google.gwt.widget.client | Modern widgets, usually backed by Cells. | 
| Class and Description | 
|---|
| AcceptsOneWidget Implemented by displays that can be given accept an  IsWidgetto show. | 
| Class and Description | 
|---|
| Focusable A widget that implements this interface can receive keyboard focus. | 
| HasEnabled A widget that implements this interface can be put in an "enabled"
 or "disabled" state. | 
| HasFocus Deprecated. 
 Use  Focusableinstead | 
| HasVisibility Implemented by objects that have the visibility trait. | 
| IsWidget Extended by view interfaces that are likely to be implemented by Widgets. | 
| SourcesClickEvents Deprecated. 
 use  HasClickHandlersinstead | 
| SourcesFocusEvents Deprecated. 
 use  HasAllFocusHandlersinstead | 
| SourcesKeyboardEvents Deprecated. 
 use  HasAllKeyHandlersinstead | 
| SourcesMouseEvents Deprecated. 
 use  HasAllMouseHandlersinstead | 
| Class and Description | 
|---|
| HasEnabled A widget that implements this interface can be put in an "enabled"
 or "disabled" state. | 
| HasVerticalAlignment.VerticalAlignmentConstant Horizontal alignment constant. | 
| Class and Description | 
|---|
| HasVisibility Implemented by objects that have the visibility trait. | 
| IsRenderable An interface for UI elements that can be built by first generating a piece
 of HTML and afterwards wrapping a root widget. | 
| IsWidget Extended by view interfaces that are likely to be implemented by Widgets. | 
| ValueBoxBase Abstract base class for all text entry widgets. | 
| Class and Description | 
|---|
| HasText An object that implements this interface contains text, which can be set and
 retrieved using these methods. | 
| ValueBoxBase Abstract base class for all text entry widgets. | 
| Class and Description | 
|---|
| HasText An object that implements this interface contains text, which can be set and
 retrieved using these methods. | 
| Class and Description | 
|---|
| AcceptsOneWidget Implemented by displays that can be given accept an  IsWidgetto show. | 
| HasAnimation A  Widgetthat uses an animation should implement this class so users
 can enable or disable animations. | 
| HasOneWidget Implemented by panels that have only one widget. | 
| HasVisibility Implemented by objects that have the visibility trait. | 
| HasWidgets A widget that implements this interface contains
  widgetsand can enumerate them. | 
| HasWidgets.ForIsWidget Extends this interface with convenience methods to handle  IsWidget. | 
| IsWidget Extended by view interfaces that are likely to be implemented by Widgets. | 
| SourcesPopupEvents Deprecated. 
 use
  HasCloseHandlersinstead | 
| Widget The base class for the majority of user-interface objects. | 
| Class and Description | 
|---|
| Focusable A widget that implements this interface can receive keyboard focus. | 
| HasEnabled A widget that implements this interface can be put in an "enabled"
 or "disabled" state. | 
| HasFocus Deprecated. 
 Use  Focusableinstead | 
| HasVisibility Implemented by objects that have the visibility trait. | 
| IsWidget Extended by view interfaces that are likely to be implemented by Widgets. | 
| SourcesClickEvents Deprecated. 
 use  HasClickHandlersinstead | 
| SourcesFocusEvents Deprecated. 
 use  HasAllFocusHandlersinstead | 
| SourcesKeyboardEvents Deprecated. 
 use  HasAllKeyHandlersinstead | 
| SourcesMouseEvents Deprecated. 
 use  HasAllMouseHandlersinstead | 
| Class and Description | 
|---|
| HasScrolling Implemented by widgets that support scrolling. | 
| Class and Description | 
|---|
| Focusable A widget that implements this interface can receive keyboard focus. | 
| HasAlignment A widget that implements this interface has an intrinsic alignment which
 can be manipulated using these methods and constants. | 
| HasAnimation A  Widgetthat uses an animation should implement this class so users
 can enable or disable animations. | 
| HasHorizontalAlignment Characteristic interface which indicates that a widget can be aligned
 horizontally. | 
| HasHorizontalAlignment.HorizontalAlignmentConstant Possible return values for  HasHorizontalAlignment.getHorizontalAlignment(), and parameter
 values forHasHorizontalAlignment.setHorizontalAlignment(com.google.gwt.user.client.ui.HasHorizontalAlignment.HorizontalAlignmentConstant). | 
| HasValue Extends  TakesValueto allow the value to be pulled back out, and to
 throwValueChangeEventevents. | 
| HasVerticalAlignment Characteristic interface which indicates that a widget has an associated
 vertical alignment. | 
| HasVerticalAlignment.VerticalAlignmentConstant Horizontal alignment constant. | 
| HasVisibility Implemented by objects that have the visibility trait. | 
| IsRenderable An interface for UI elements that can be built by first generating a piece
 of HTML and afterwards wrapping a root widget. | 
| IsWidget Extended by view interfaces that are likely to be implemented by Widgets. | 
| ProvidesResize This tag interface specifies that the implementing widget will call
  RequiresResize.onResize()on its children whenever their size may
 have changed. | 
| RequiresResize This interface designates that its implementor needs to be informed whenever
 its size is modified. | 
| UIObject The superclass for all user-interface objects. | 
| Widget The base class for the majority of user-interface objects. | 
| Class and Description | 
|---|
| UIObject The superclass for all user-interface objects. | 
| Class and Description | 
|---|
| AbstractImagePrototype An opaque representation of a particular image such that the image can be
 accessed either as an HTML fragment or as an  Imageobject. | 
| AbstractImagePrototype.ImagePrototypeElement This corresponds to the top Element of the DOM structure created by
  AbstractImagePrototype.createElement(). | 
| AcceptsOneWidget Implemented by displays that can be given accept an  IsWidgetto show. | 
| Anchor A widget that represents a simple <a> element. | 
| AnimatedLayout Specifies that a panel can animate between layouts. | 
| AttachDetachException.Command The command to execute when iterating through child widgets. | 
| Button A standard push-button widget. | 
| CaptionPanel.CaptionPanelImpl Implementation class without browser-specific hacks. | 
| ChangeListener Deprecated. 
 As of GWT 1.6, DOM and logical change events are separate. Use
              ChangeHandlerfor changes
             triggered by a DOM-based change event andValueChangeHandlerfor changes resulting from a logical event such as a method call
             that changes state | 
| ChangeListenerCollection Deprecated. 
 Widgets should now manage their own handlers via  Widget.addDomHandler(H, com.google.gwt.event.dom.client.DomEvent.Type<H>) | 
| ClickListener Deprecated. 
 Use  ClickHandlerinstead | 
| ClickListenerCollection Deprecated. 
 As of GWT 1.6, call
              to manage handlers for your widget instead | 
| CustomButton.Face Represents a button's face. | 
| CustomScrollPanel.Resources A ClientBundle of resources used by this widget. | 
| CustomScrollPanel.Style Styles used by this widget. | 
| DeckPanel A panel that displays all of its child widgets in a 'deck', where only one
 can be visible at a time. | 
| DialogBox.Caption Set of characteristic interfaces supported by the  DialogBoxcaption. | 
| DirectionalTextHelper A helper class for displaying bidi (i.e. | 
| DisclosureEvent Deprecated. 
 Use
              CloseEventandOpenEventinstead | 
| DisclosureHandler Deprecated. 
 Use  CloseHandlerand/orOpenHandlerinstead | 
| DisclosurePanel A widget that consists of a header and a content panel that discloses the
 content when a user clicks on the header. | 
| DisclosurePanelImages Deprecated.  | 
| DockLayoutPanel.Direction Used in  DockLayoutPanel.addEast(Widget, double)et al to specify
 the direction in which a child widget will be added. | 
| DockPanel.DockLayoutConstant DockPanel layout constant, used in
  DockPanel.add(Widget, DockPanel.DockLayoutConstant). | 
| FileUpload A widget that wraps the HTML <input type='file'> element. | 
| FiresDisclosureEvents Deprecated. 
 Use  HasOpenHandlersandHasCloseHandlersinstead | 
| FiresFormEvents Deprecated. 
 This interface was specific to  FormPanel; it is not
 generally useful and will be removed in a future version.
 UseFormPanel.addSubmitHandler(FormPanel.SubmitHandler)andFormPanel.addSubmitCompleteHandler(FormPanel.SubmitCompleteHandler)instead | 
| FiresSuggestionEvents Deprecated. 
 Use
  HasSelectionHandlersinstead. | 
| FlexTable.FlexCellFormatter FlexTable-specific implementation of  HTMLTable.CellFormatter. | 
| Focusable A widget that implements this interface can receive keyboard focus. | 
| FocusListener Deprecated. 
 Use  FocusHandlerand/orBlurHandlerinstead | 
| FocusListenerCollection Deprecated. 
 Widgets should now manage their own handlers via  Widget.addDomHandler(H, com.google.gwt.event.dom.client.DomEvent.Type<H>) | 
| FormHandler Deprecated. 
 Use  FormPanel.SubmitCompleteHandlerand/orFormPanel.SubmitHandlerinstead | 
| FormPanel A panel that wraps its contents in an HTML <FORM> element. | 
| FormPanel.SubmitCompleteEvent Fired when a form has been submitted successfully. | 
| FormPanel.SubmitCompleteHandler Handler for  FormPanel.SubmitCompleteEventevents. | 
| FormPanel.SubmitEvent Fired when the form is submitted. | 
| FormPanel.SubmitHandler Handler for  FormPanel.SubmitEventevents. | 
| FormSubmitCompleteEvent Event object containing information about form submission events. | 
| FormSubmitEvent Event object containing information about form submission events. | 
| Frame A widget that wraps an IFRAME element, which can contain an arbitrary web
 site. | 
| HasAlignment A widget that implements this interface has an intrinsic alignment which
 can be manipulated using these methods and constants. | 
| HasAnimation A  Widgetthat uses an animation should implement this class so users
 can enable or disable animations. | 
| HasAutoHorizontalAlignment A widget that implements this interface can be configured to be aligned
 according to its contents' direction, in addition to the static alignment
 options offered by  HasHorizontalAlignment. | 
| HasConstrainedValue Implemented by widgets that pick from a set of values. | 
| HasDirectionalHtml An object that implements this interface contains html that has a direction. | 
| HasDirectionalSafeHtml An object that implements this interface contains html that has a direction. | 
| HasDirectionalText An object that implements this interface contains text that has a direction. | 
| HasEnabled A widget that implements this interface can be put in an "enabled"
 or "disabled" state. | 
| HasFocus Deprecated. 
 Use  Focusableinstead | 
| HasHorizontalAlignment Characteristic interface which indicates that a widget can be aligned
 horizontally. | 
| HasHorizontalAlignment.AutoHorizontalAlignmentConstant Type for values defined and used in  HasAutoHorizontalAlignment. | 
| HasHorizontalAlignment.HorizontalAlignmentConstant Possible return values for  HasHorizontalAlignment.getHorizontalAlignment(), and parameter
 values forHasHorizontalAlignment.setHorizontalAlignment(com.google.gwt.user.client.ui.HasHorizontalAlignment.HorizontalAlignmentConstant). | 
| HasHorizontalScrolling Implemented by widgets that support horizontal scrolling. | 
| HasHTML An object that implements this interface contains text, which can be set and
 retrieved using these methods. | 
| HasName A widget that implements this interface has a 'name' associated with it,
 allowing it to be used with  FormPanel. | 
| HasOneWidget Implemented by panels that have only one widget. | 
| HasScrolling Implemented by widgets that support scrolling. | 
| HasText An object that implements this interface contains text, which can be set and
 retrieved using these methods. | 
| HasTreeItems A widget that implements this interface contains
  itemsand can operate them. | 
| HasTreeItems.ForIsWidget Extends this interface with convenience methods to handle  IsWidget. | 
| HasValue Extends  TakesValueto allow the value to be pulled back out, and to
 throwValueChangeEventevents. | 
| HasVerticalAlignment Characteristic interface which indicates that a widget has an associated
 vertical alignment. | 
| HasVerticalAlignment.VerticalAlignmentConstant Horizontal alignment constant. | 
| HasVerticalScrolling Implemented by widgets that support vertical scrolling. | 
| HasVisibility Implemented by objects that have the visibility trait. | 
| HasWidgets A widget that implements this interface contains
  widgetsand can enumerate them. | 
| HasWidgets.ForIsWidget Extends this interface with convenience methods to handle  IsWidget. | 
| HasWordWrap A widget that implements this interface has a 'word-wrap' property that can
 be manipulated using these methods. | 
| Hidden Represents a hidden field in an HTML form. | 
| HorizontalScrollbar Describes a horizontal scrollbar. | 
| HorizontalSplitPanel.Resources Deprecated.  The default resources used by this widget. | 
| HorizontalSplitPanelImages Deprecated. 
 replaced by  HorizontalSplitPanel.Resources. | 
| HTML A widget that can contain arbitrary HTML. | 
| HTMLPanel A panel that contains HTML, and which can attach child widgets to identified
 elements within that HTML. | 
| HTMLTable.Cell Return value for  HTMLTable.getCellForEvent(com.google.gwt.event.dom.client.ClickEvent). | 
| HTMLTable.CellFormatter This class contains methods used to format a table's cells. | 
| HTMLTable.ColumnFormatter This class contains methods used to format a table's columns. | 
| HTMLTable.RowFormatter This class contains methods used to format a table's rows. | 
| Image A widget that displays the image at a given URL. | 
| ImageBundle Deprecated. 
 replaced by  ClientBundleandImageResource | 
| ImageBundle.Resource Deprecated.  Explicitly specifies a file name or path to the image resource to be
 associated with a method in an  ImageBundle. | 
| IndexedPanel Implemented by panels that impose an explicit ordering on their children. | 
| IndexedPanel.ForIsWidget Extends this interface with convenience methods to handle  IsWidget. | 
| InlineHTML A widget that can contain arbitrary HTML. | 
| InlineLabel A widget that contains arbitrary text, not interpreted as HTML. | 
| InsertPanel Implemented by  IndexedPanels that also allow insertions. | 
| InsertPanel.ForIsWidget Extends this interface with convenience methods to handle  IsWidget. | 
| IsRenderable An interface for UI elements that can be built by first generating a piece
 of HTML and afterwards wrapping a root widget. | 
| IsTreeItem Extended by objects which have underlying  TreeItem. | 
| IsWidget Extended by view interfaces that are likely to be implemented by Widgets. | 
| KeyboardListener Deprecated. 
 use  KeyDownHandler,KeyUpHandlerand/orKeyPressHandlerinstead | 
| KeyboardListenerCollection Deprecated. 
 Widgets should now manage their own handlers via  Widget.addDomHandler(H, com.google.gwt.event.dom.client.DomEvent.Type<H>) | 
| Label A widget that contains arbitrary text, not interpreted as HTML. | 
| ListBox A widget that presents a list of choices to the user, either as a list box or
 as a drop-down list. | 
| ListenerWrapper Deprecated. 
 will be removed in GWT 2.7 with the handler listeners themselves | 
| ListenerWrapper.WrappedChangeListener Deprecated. 
 will be removed in GWT 2.0 along with the listeners being
             wrapped | 
| ListenerWrapper.WrappedClickListener Deprecated. 
 will be removed in GWT 2.0 along with the listeners being
             wrapped | 
| ListenerWrapper.WrappedFocusListener Deprecated.  Wrapper for a  FocusListener. | 
| ListenerWrapper.WrappedKeyboardListener Deprecated.  Wrapper for a  KeyboardListener. | 
| ListenerWrapper.WrappedLoadListener Deprecated.  Wrapper for a  LoadListener. | 
| ListenerWrapper.WrappedLogicalChangeListener Deprecated. 
 will be removed in GWT 2.0 along with the listeners being
             wrapped | 
| ListenerWrapper.WrappedMouseListener Deprecated.  Wrapper for a  MouseListener. | 
| ListenerWrapper.WrappedMouseWheelListener Deprecated.  Wrapper for a  MouseWheelListener. | 
| ListenerWrapper.WrappedScrollListener Deprecated.  Wrapper for a  ScrollListener. | 
| LoadListener Deprecated. 
 use  LoadHandlerandErrorHandlerinstead | 
| MenuBar A standard menu bar widget. | 
| MenuBar.MenuBarImages Deprecated. 
 replaced by  MenuBar.Resources | 
| MenuBar.Resources A ClientBundle that contains the default resources for this widget. | 
| MenuItem An entry in a
  MenuBar. | 
| MenuItemSeparator A separator that can be placed in a
  MenuBar. | 
| MouseListener Deprecated. 
 use  MouseDownHandler,MouseUpHandler,MouseOverHandler,MouseMoveHandler, andMouseOutHandlerinstead | 
| MouseWheelListener Deprecated. 
 use  MouseWheelHandlerinstead | 
| MouseWheelVelocity Deprecated. 
 use
              MouseWheelEvent.getDeltaY()instead | 
| MultiWordSuggestOracle.MultiWordSuggestion Suggestion class for  MultiWordSuggestOracle. | 
| NamedFrame A  Framethat has a 'name' associated
 with it. | 
| NativeHorizontalScrollbar.Resources A ClientBundle of resources used by this widget. | 
| NativeHorizontalScrollbar.Style Styles used by this widget. | 
| NativeVerticalScrollbar.Resources A ClientBundle of resources used by this widget. | 
| NativeVerticalScrollbar.Style Styles used by this widget. | 
| PasswordTextBox A text box that visually masks its input to prevent eavesdropping. | 
| PopupListener Deprecated. 
 use  CloseHandlerinstead | 
| PopupPanel A panel that can "pop up" over other widgets. | 
| PopupPanel.PositionCallback A callback that is used to set the position of a  PopupPanelright
 before it is shown. | 
| PotentialElement EXPERIMENTAL and subject to change. | 
| ProvidesResize This tag interface specifies that the implementing widget will call
  RequiresResize.onResize()on its children whenever their size may
 have changed. | 
| RenderableStamper Used by  IsRenderableto mark their root element in such a way that
 they can be later retrieved. | 
| RequiresResize This interface designates that its implementor needs to be informed whenever
 its size is modified. | 
| RichTextArea.BasicFormatter Deprecated. 
 use  RichTextArea.Formatterinstead | 
| RichTextArea.ExtendedFormatter Deprecated. 
 use  RichTextArea.Formatterinstead | 
| RichTextArea.FontSize Font size enumeration. | 
| RichTextArea.Formatter 
 This interface is used to access full formatting options, when available. | 
| RichTextArea.Justification Justification enumeration. | 
| RootLayoutPanel A singleton implementation of  LayoutPanelthat always attaches itself
 to the document body (i.e. | 
| RootPanel The panel to which all other widgets must ultimately be added. | 
| ScrollListener Deprecated. 
 use  ScrollHandlerinstead | 
| SimpleCheckBox A simple checkbox widget, with no label. | 
| SimplePanel Base class for panels that contain only one widget. | 
| SimpleRadioButton A simple radio button widget, with no label. | 
| SourcesChangeEvents Deprecated. 
 we have now separated dom and logical change events. Use
  HasChangeHandlersif the
 change listener was triggered by a dom change event orHasValueChangeHandlersif it was based on a logical event | 
| SourcesClickEvents Deprecated. 
 use  HasClickHandlersinstead | 
| SourcesFocusEvents Deprecated. 
 use  HasAllFocusHandlersinstead | 
| SourcesKeyboardEvents Deprecated. 
 use  HasAllKeyHandlersinstead | 
| SourcesLoadEvents Deprecated. 
 use  HasErrorHandlersandHasLoadHandlersinstead | 
| SourcesMouseEvents Deprecated. 
 use  HasAllMouseHandlersinstead | 
| SourcesMouseWheelEvents Deprecated. 
 Use  HasMouseWheelHandlersinstead | 
| SourcesPopupEvents Deprecated. 
 use
  HasCloseHandlersinstead | 
| SourcesScrollEvents Deprecated. 
 use  HasScrollHandlersinstead | 
| SourcesTabEvents Deprecated. 
 use  HasSelectionHandlersandHasBeforeSelectionHandlersinstead | 
| SourcesTableEvents Deprecated. 
 use  HasClickHandlersinstead. Event sources should implement methods similar toHTMLTable.getCellForEvent(com.google.gwt.event.dom.client.ClickEvent) | 
| SourcesTreeEvents Deprecated. 
 use
  HasBeforeSelectionHandlers,HasOpenHandlersandHasClickHandlersinstead | 
| SuggestBox A  SuggestBoxis a text box or text area which displays a
 pre-configured set of selections that match the user's input. | 
| SuggestBox.SuggestionCallback The callback used when a user selects a  SuggestOracle.Suggestion. | 
| SuggestBox.SuggestionDisplay Used to display suggestions to the user. | 
| SuggestionEvent Event object containing information about the selection of a
  SuggestOracle.Suggestiondisplayed by aSuggestBox. | 
| SuggestionHandler Deprecated. 
 use  SelectionHandlerinstead | 
| SuggestOracle A  SuggestOraclecan be used to create
 suggestions associated with a specific query string. | 
| SuggestOracle.Callback Callback for  SuggestOracle. | 
| SuggestOracle.Request A  SuggestOraclerequest. | 
| SuggestOracle.Response SuggestOracleresponse. | 
| SuggestOracle.Suggestion Suggestion supplied by the
  SuggestOracle. | 
| TabBar A horizontal bar of folder-style tabs, most commonly used as part of a
  TabPanel. | 
| TabBar.Tab Set of characteristic interfaces supported by  TabBartabs. | 
| TableListener Deprecated. 
 | 
| TabListener | 
| TextArea A text box that allows multiple lines of text to be entered. | 
| TextBox A standard single-line text box. | 
| TextBoxBase Abstract base class for most text entry widgets. | 
| TextBoxBase.TextAlignConstant Deprecated. 
 | 
| Tree A standard hierarchical tree widget. | 
| Tree.Resources A ClientBundle that provides images for this widget. | 
| TreeImages Deprecated. 
 replaced by  Tree.Resources. | 
| TreeItem An item that can be contained within a
  Tree. | 
| TreeItem.TreeItemImpl Implementation class for  TreeItem. | 
| TreeListener Deprecated. 
 Use  SelectionHandler,OpenHandler, andCloseHandlerinstead | 
| UIObject The superclass for all user-interface objects. | 
| UIObject.DebugIdImpl The implementation of the set debug id method, which does nothing by
 default. | 
| ValueBox A text box able to parse its displayed value. | 
| ValueBoxBase Abstract base class for all text entry widgets. | 
| ValueBoxBase.TextAlignment Alignment values for  ValueBoxBase.setAlignment(com.google.gwt.user.client.ui.ValueBoxBase.TextAlignment). | 
| ValueLabel A label displaying its value through a renderer. | 
| ValuePicker Allows the user to pick a single value from a list. | 
| VerticalScrollbar Describes a vertical scrollbar. | 
| VerticalSplitPanel.Resources Deprecated.  The default resources used by this widget. | 
| VerticalSplitPanelImages Deprecated. 
 replaced by  VerticalSplitPanel.Resources. | 
| Widget The base class for the majority of user-interface objects. | 
| WidgetCollection A simple collection of widgets to be used by
  panelsandcomposites. | 
| Class and Description | 
|---|
| AbstractImagePrototype An opaque representation of a particular image such that the image can be
 accessed either as an HTML fragment or as an  Imageobject. | 
| AbstractImagePrototype.ImagePrototypeElement This corresponds to the top Element of the DOM structure created by
  AbstractImagePrototype.createElement(). | 
| Image A widget that displays the image at a given URL. | 
| RichTextArea A rich text editor that allows complex styling and formatting. | 
| RichTextArea.BasicFormatter Deprecated. 
 use  RichTextArea.Formatterinstead | 
| RichTextArea.ExtendedFormatter Deprecated. 
 use  RichTextArea.Formatterinstead | 
| RichTextArea.FontSize Font size enumeration. | 
| RichTextArea.Formatter 
 This interface is used to access full formatting options, when available. | 
| RichTextArea.Justification Justification enumeration. | 
| Class and Description | 
|---|
| HasEnabled A widget that implements this interface can be put in an "enabled"
 or "disabled" state. | 
| HasValue Extends  TakesValueto allow the value to be pulled back out, and to
 throwValueChangeEventevents. | 
| HasVisibility Implemented by objects that have the visibility trait. | 
| IsRenderable An interface for UI elements that can be built by first generating a piece
 of HTML and afterwards wrapping a root widget. | 
| IsWidget Extended by view interfaces that are likely to be implemented by Widgets. | 
| ListBox A widget that presents a list of choices to the user, either as a list box or
 as a drop-down list. | 
| TextBox A standard single-line text box. | 
| Class and Description | 
|---|
| Focusable A widget that implements this interface can receive keyboard focus. | 
| HasEnabled A widget that implements this interface can be put in an "enabled"
 or "disabled" state. | 
| HasText An object that implements this interface contains text, which can be set and
 retrieved using these methods. | 
| HasValue Extends  TakesValueto allow the value to be pulled back out, and to
 throwValueChangeEventevents. | 
| HasVisibility Implemented by objects that have the visibility trait. | 
| IsWidget Extended by view interfaces that are likely to be implemented by Widgets. | 
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