| Package | Description | 
|---|---|
| com.google.gwt.canvas.client | Classes for HTML Canvas 2D support. | 
| com.google.gwt.event.dom.client | Types related to DOM events. | 
| com.google.gwt.i18n.client | Internationalization support for GWT applications. | 
| com.google.gwt.media.client | 
 Widgets for HTML Audio and Video support. | 
| com.google.gwt.touch.client | |
| com.google.gwt.user.client | Fundamental user-interface classes used in client-side GWT code. | 
| com.google.gwt.user.client.ui | Widgets, Panels, and other user-interface classes. | 
| com.google.gwt.user.datepicker.client | The date picker widget and associated types. | 
| Class and Description | 
|---|
| HasAllDragAndDropHandlers This is a convenience interface that includes all drag and drop handlers
 defined by the core GWT system. | 
| HasAllFocusHandlers This is a convenience interface that includes all focus handlers defined by
 the core GWT system. | 
| HasAllGestureHandlers This is a convenience interface that includes all gesture handlers defined by
 the core GWT system. | 
| HasAllKeyHandlers Convenience interface used to implement all key handlers at once. | 
| HasAllMouseHandlers This is a convenience interface that includes all mouse handlers defined by
 the core GWT system. | 
| HasAllTouchHandlers This is a convenience interface that includes all touch handlers defined by
 the core GWT system. | 
| HasBlurHandlers A widget that implements this interface provides registration for
  BlurHandlerinstances. | 
| HasClickHandlers A widget that implements this interface provides registration for
  ClickHandlerinstances. | 
| HasDoubleClickHandlers A widget that implements this interface provides registration for
  DoubleClickHandlerinstances. | 
| HasDragEndHandlers A widget that implements this interface provides registration for
  DragEndHandlerinstances. | 
| HasDragEnterHandlers A widget that implements this interface provides registration for
  DragEnterHandlerinstances. | 
| HasDragHandlers A widget that implements this interface provides registration for
  DragHandlerinstances. | 
| HasDragLeaveHandlers A widget that implements this interface provides registration for
  DragLeaveHandlerinstances. | 
| HasDragOverHandlers A widget that implements this interface provides registration for
  DragOverHandlerinstances. | 
| HasDragStartHandlers A widget that implements this interface provides registration for
  DragStartHandlerinstances. | 
| HasDropHandlers A widget that implements this interface provides registration for
  DropHandlerinstances. | 
| HasFocusHandlers A widget that implements this interface provides registration for
  FocusHandlerinstances. | 
| HasGestureChangeHandlers A widget that implements this interface provides registration for
  GestureChangeHandlerinstances. | 
| HasGestureEndHandlers A widget that implements this interface provides registration for
  GestureEndHandlerinstances. | 
| HasGestureStartHandlers A widget that implements this interface provides registration for
  GestureStartHandlerinstances. | 
| HasKeyDownHandlers A widget that implements this interface provides registration for
  KeyDownHandlerinstances. | 
| HasKeyPressHandlers A widget that implements this interface provides registration for
  KeyPressHandlerinstances. | 
| HasKeyUpHandlers A widget that implements this interface provides registration for
  KeyUpHandlerinstances. | 
| HasMouseDownHandlers A widget that implements this interface provides registration for
  MouseDownHandlerinstances. | 
| HasMouseMoveHandlers A widget that implements this interface provides registration for
  MouseMoveHandlerinstances. | 
| HasMouseOutHandlers A widget that implements this interface provides registration for
  MouseOutHandlerinstances. | 
| HasMouseOverHandlers A widget that implements this interface provides registration for
  MouseOverHandlerinstances. | 
| HasMouseUpHandlers A widget that implements this interface provides registration for
  MouseUpHandlerinstances. | 
| HasMouseWheelHandlers A widget that implements this interface provides registration for
  MouseWheelHandlerinstances. | 
| HasTouchCancelHandlers A widget that implements this interface provides registration for
  TouchCancelHandlerinstances. | 
| HasTouchEndHandlers A widget that implements this interface provides registration for
  TouchEndHandlerinstances. | 
| HasTouchMoveHandlers A widget that implements this interface provides registration for
  TouchMoveHandlerinstances. | 
| HasTouchStartHandlers A widget that implements this interface provides registration for
  TouchStartHandlerinstances. | 
| Class and Description | 
|---|
| BlurEvent Represents a native blur event. | 
| BlurHandler Handler interface for  BlurEventevents. | 
| CanPlayThroughEvent Represents a native media can play through event. | 
| CanPlayThroughHandler Handler interface for  CanPlayThroughEventevents. | 
| ChangeEvent Represents a native change event. | 
| ChangeHandler Handler for  ChangeEventevents. | 
| ClickEvent Represents a native click event. | 
| ClickHandler Handler for  ClickEventevents. | 
| ContextMenuEvent Represents a native context menu event. | 
| ContextMenuHandler Handler for  ContextMenuEventevents. | 
| DomEvent DomEventis a subclass ofGwtEventthat provides events that
 underlying native browser event object as well as a subclass ofDomEvent.Typethat understands GWT event bits used by sinkEvents(). | 
| DomEvent.Type Type class used by dom event subclasses. | 
| DoubleClickEvent Represents a native double click event. | 
| DoubleClickHandler Handler interface for  DoubleClickEventevents. | 
| DragDropEventBase Base class for drag and drop events. | 
| DragDropEventBase.DragSupportDetector Detector for browser support of drag events. | 
| DragEndEvent Represents a native drag end event. | 
| DragEndHandler Handler interface for  DragEndEventevents. | 
| DragEnterEvent Represents a native drag enter event. | 
| DragEnterHandler Handler interface for  DragEnterEventevents. | 
| DragEvent Represents a native drag event. | 
| DragHandler Handler interface for  DragEventevents. | 
| DragLeaveEvent Represents a native drag leave event. | 
| DragLeaveHandler Handler interface for  DragLeaveEventevents. | 
| DragOverEvent Represents a native drag over event. | 
| DragOverHandler Handler interface for  DragOverEventevents. | 
| DragStartEvent Represents a native drag start event. | 
| DragStartHandler Handler interface for  DragStartEventevents. | 
| DropEvent Represents a native drop event. | 
| DropHandler Handler interface for  DropEventevents. | 
| EndedEvent Represents a native media ended event. | 
| EndedHandler Handler interface for  EndedEventevents. | 
| ErrorEvent Represents a native error event. | 
| ErrorHandler Handler interface for  ErrorEventevents. | 
| FocusEvent Represents a native focus event. | 
| FocusHandler Handler interface for  FocusEventevents. | 
| GestureChangeEvent Represents a native gesture change event. | 
| GestureChangeHandler Handler interface for  GestureChangeEventevents. | 
| GestureEndEvent Represents a native gesture end event. | 
| GestureEndHandler Handler interface for  GestureEndEventevents. | 
| GestureStartEvent Represents a native gesture start event. | 
| GestureStartHandler Handler interface for  GestureStartEventevents. | 
| HasAllFocusHandlers This is a convenience interface that includes all focus handlers defined by
 the core GWT system. | 
| HasAllKeyHandlers Convenience interface used to implement all key handlers at once. | 
| HasAllMouseHandlers This is a convenience interface that includes all mouse handlers defined by
 the core GWT system. | 
| HasAllTouchHandlers This is a convenience interface that includes all touch handlers defined by
 the core GWT system. | 
| HasBlurHandlers A widget that implements this interface provides registration for
  BlurHandlerinstances. | 
| HasCanPlayThroughHandlers A widget that implements this interface provides registration for
  CanPlayThroughHandlerinstances. | 
| HasDragEndHandlers A widget that implements this interface provides registration for
  DragEndHandlerinstances. | 
| HasDragEnterHandlers A widget that implements this interface provides registration for
  DragEnterHandlerinstances. | 
| HasDragHandlers A widget that implements this interface provides registration for
  DragHandlerinstances. | 
| HasDragLeaveHandlers A widget that implements this interface provides registration for
  DragLeaveHandlerinstances. | 
| HasDragOverHandlers A widget that implements this interface provides registration for
  DragOverHandlerinstances. | 
| HasDragStartHandlers A widget that implements this interface provides registration for
  DragStartHandlerinstances. | 
| HasDropHandlers A widget that implements this interface provides registration for
  DropHandlerinstances. | 
| HasEndedHandlers A widget that implements this interface provides registration for
  EndedHandlerinstances. | 
| HasFocusHandlers A widget that implements this interface provides registration for
  FocusHandlerinstances. | 
| HasGestureChangeHandlers A widget that implements this interface provides registration for
  GestureChangeHandlerinstances. | 
| HasGestureEndHandlers A widget that implements this interface provides registration for
  GestureEndHandlerinstances. | 
| HasGestureStartHandlers A widget that implements this interface provides registration for
  GestureStartHandlerinstances. | 
| HasKeyDownHandlers A widget that implements this interface provides registration for
  KeyDownHandlerinstances. | 
| HasKeyPressHandlers A widget that implements this interface provides registration for
  KeyPressHandlerinstances. | 
| HasKeyUpHandlers A widget that implements this interface provides registration for
  KeyUpHandlerinstances. | 
| HasLoadedMetadataHandlers A widget that implements this interface provides registration for
  LoadedMetadataHandlerinstances. | 
| HasMouseDownHandlers A widget that implements this interface provides registration for
  MouseDownHandlerinstances. | 
| HasMouseMoveHandlers A widget that implements this interface provides registration for
  MouseMoveHandlerinstances. | 
| HasMouseOutHandlers A widget that implements this interface provides registration for
  MouseOutHandlerinstances. | 
| HasMouseOverHandlers A widget that implements this interface provides registration for
  MouseOverHandlerinstances. | 
| HasMouseUpHandlers A widget that implements this interface provides registration for
  MouseUpHandlerinstances. | 
| HasMouseWheelHandlers A widget that implements this interface provides registration for
  MouseWheelHandlerinstances. | 
| HasNativeEvent An object that implements this interface has a native event associated with
 it. | 
| HasProgressHandlers A widget that implements this interface provides registration for
  ProgressHandlerinstances. | 
| HasTouchCancelHandlers A widget that implements this interface provides registration for
  TouchCancelHandlerinstances. | 
| HasTouchEndHandlers A widget that implements this interface provides registration for
  TouchEndHandlerinstances. | 
| HasTouchMoveHandlers A widget that implements this interface provides registration for
  TouchMoveHandlerinstances. | 
| HasTouchStartHandlers A widget that implements this interface provides registration for
  TouchStartHandlerinstances. | 
| HumanInputEvent Abstract class representing position events such as mouse or touch events. | 
| KeyCodeEvent Key up and key down are both events based upon a given key code. | 
| KeyDownEvent Represents a native key down event. | 
| KeyDownHandler Handler interface for  KeyDownEventevents. | 
| KeyEvent Base class for Key events. | 
| KeyPressEvent Represents a native key press event. | 
| KeyPressHandler Handler interface for  KeyPressEventevents. | 
| KeyUpEvent Represents a native key up event. | 
| KeyUpHandler Handler interface for  KeyUpEventevents. | 
| LoadedMetadataEvent Represents a native loadedmetadata event. | 
| LoadedMetadataHandler Handler interface for  LoadedMetadataEventevents. | 
| LoadEvent Represents a native load event. | 
| LoadHandler Handler interface for  LoadEventevents. | 
| LoseCaptureEvent Represents a native lose capture event. | 
| LoseCaptureHandler Handler interface for  LoseCaptureEventevents. | 
| MouseDownEvent Represents a native mouse down event. | 
| MouseDownHandler Handler interface for  MouseDownEventevents. | 
| MouseEvent Abstract class representing mouse events. | 
| MouseMoveEvent Represents a native mouse move event. | 
| MouseMoveHandler Handler interface for  MouseMoveEventevents. | 
| MouseOutEvent Represents a native mouse out event. | 
| MouseOutHandler Handler interface for  MouseOutEventevents. | 
| MouseOverEvent Represents a native mouse over event. | 
| MouseOverHandler Handler interface for  MouseOverEventevents. | 
| MouseUpEvent Represents a native mouse up event. | 
| MouseUpHandler Handler interface for  MouseUpEventevents. | 
| MouseWheelEvent Represents a native mouse wheel event. | 
| MouseWheelHandler Handler interface for  MouseWheelEventevents. | 
| ProgressEvent Represents a native media progress event. | 
| ProgressHandler Handler interface for  ProgressEventevents. | 
| ScrollEvent Represents a native scroll event. | 
| ScrollHandler Handler interface for  ScrollEventevents. | 
| TouchCancelEvent Represents a native touch start event. | 
| TouchCancelHandler Handler interface for  TouchCancelEventevents. | 
| TouchEndEvent Represents a native touch end event. | 
| TouchEndHandler Handler interface for  TouchEndEventevents. | 
| TouchEvent Abstract class representing touch events. | 
| TouchMoveEvent Represents a native touch move event. | 
| TouchMoveHandler Handler interface for  TouchMoveEventevents. | 
| TouchStartEvent Represents a native touch start event. | 
| TouchStartHandler Handler interface for  TouchStartEventevents. | 
| Class and Description | 
|---|
| HasKeyUpHandlers A widget that implements this interface provides registration for
  KeyUpHandlerinstances. | 
| KeyUpEvent Represents a native key up event. | 
| KeyUpHandler Handler interface for  KeyUpEventevents. | 
| Class and Description | 
|---|
| CanPlayThroughHandler Handler interface for  CanPlayThroughEventevents. | 
| EndedHandler Handler interface for  EndedEventevents. | 
| HasAllDragAndDropHandlers This is a convenience interface that includes all drag and drop handlers
 defined by the core GWT system. | 
| HasAllFocusHandlers This is a convenience interface that includes all focus handlers defined by
 the core GWT system. | 
| HasAllGestureHandlers This is a convenience interface that includes all gesture handlers defined by
 the core GWT system. | 
| HasAllKeyHandlers Convenience interface used to implement all key handlers at once. | 
| HasAllMediaHandlers This is a convenience interface that includes all media handlers defined by
 the core GWT system. | 
| HasAllMouseHandlers This is a convenience interface that includes all mouse handlers defined by
 the core GWT system. | 
| HasAllTouchHandlers This is a convenience interface that includes all touch handlers defined by
 the core GWT system. | 
| HasBlurHandlers A widget that implements this interface provides registration for
  BlurHandlerinstances. | 
| HasCanPlayThroughHandlers A widget that implements this interface provides registration for
  CanPlayThroughHandlerinstances. | 
| HasClickHandlers A widget that implements this interface provides registration for
  ClickHandlerinstances. | 
| HasDoubleClickHandlers A widget that implements this interface provides registration for
  DoubleClickHandlerinstances. | 
| HasDragEndHandlers A widget that implements this interface provides registration for
  DragEndHandlerinstances. | 
| HasDragEnterHandlers A widget that implements this interface provides registration for
  DragEnterHandlerinstances. | 
| HasDragHandlers A widget that implements this interface provides registration for
  DragHandlerinstances. | 
| HasDragLeaveHandlers A widget that implements this interface provides registration for
  DragLeaveHandlerinstances. | 
| HasDragOverHandlers A widget that implements this interface provides registration for
  DragOverHandlerinstances. | 
| HasDragStartHandlers A widget that implements this interface provides registration for
  DragStartHandlerinstances. | 
| HasDropHandlers A widget that implements this interface provides registration for
  DropHandlerinstances. | 
| HasEndedHandlers A widget that implements this interface provides registration for
  EndedHandlerinstances. | 
| HasFocusHandlers A widget that implements this interface provides registration for
  FocusHandlerinstances. | 
| HasGestureChangeHandlers A widget that implements this interface provides registration for
  GestureChangeHandlerinstances. | 
| HasGestureEndHandlers A widget that implements this interface provides registration for
  GestureEndHandlerinstances. | 
| HasGestureStartHandlers A widget that implements this interface provides registration for
  GestureStartHandlerinstances. | 
| HasKeyDownHandlers A widget that implements this interface provides registration for
  KeyDownHandlerinstances. | 
| HasKeyPressHandlers A widget that implements this interface provides registration for
  KeyPressHandlerinstances. | 
| HasKeyUpHandlers A widget that implements this interface provides registration for
  KeyUpHandlerinstances. | 
| HasLoadedMetadataHandlers A widget that implements this interface provides registration for
  LoadedMetadataHandlerinstances. | 
| HasMouseDownHandlers A widget that implements this interface provides registration for
  MouseDownHandlerinstances. | 
| HasMouseMoveHandlers A widget that implements this interface provides registration for
  MouseMoveHandlerinstances. | 
| HasMouseOutHandlers A widget that implements this interface provides registration for
  MouseOutHandlerinstances. | 
| HasMouseOverHandlers A widget that implements this interface provides registration for
  MouseOverHandlerinstances. | 
| HasMouseUpHandlers A widget that implements this interface provides registration for
  MouseUpHandlerinstances. | 
| HasMouseWheelHandlers A widget that implements this interface provides registration for
  MouseWheelHandlerinstances. | 
| HasProgressHandlers A widget that implements this interface provides registration for
  ProgressHandlerinstances. | 
| HasTouchCancelHandlers A widget that implements this interface provides registration for
  TouchCancelHandlerinstances. | 
| HasTouchEndHandlers A widget that implements this interface provides registration for
  TouchEndHandlerinstances. | 
| HasTouchMoveHandlers A widget that implements this interface provides registration for
  TouchMoveHandlerinstances. | 
| HasTouchStartHandlers A widget that implements this interface provides registration for
  TouchStartHandlerinstances. | 
| LoadedMetadataHandler Handler interface for  LoadedMetadataEventevents. | 
| ProgressHandler Handler interface for  ProgressEventevents. | 
| Class and Description | 
|---|
| TouchEvent Abstract class representing touch events. | 
| Class and Description | 
|---|
| HasNativeEvent An object that implements this interface has a native event associated with
 it. | 
| Class and Description | 
|---|
| BlurEvent Represents a native blur event. | 
| BlurHandler Handler interface for  BlurEventevents. | 
| ChangeEvent Represents a native change event. | 
| ChangeHandler Handler for  ChangeEventevents. | 
| ClickEvent Represents a native click event. | 
| ClickHandler Handler for  ClickEventevents. | 
| DomEvent.Type Type class used by dom event subclasses. | 
| DoubleClickHandler Handler interface for  DoubleClickEventevents. | 
| DragEndHandler Handler interface for  DragEndEventevents. | 
| DragEnterHandler Handler interface for  DragEnterEventevents. | 
| DragHandler Handler interface for  DragEventevents. | 
| DragLeaveHandler Handler interface for  DragLeaveEventevents. | 
| DragOverHandler Handler interface for  DragOverEventevents. | 
| DragStartHandler Handler interface for  DragStartEventevents. | 
| DropHandler Handler interface for  DropEventevents. | 
| ErrorEvent Represents a native error event. | 
| ErrorHandler Handler interface for  ErrorEventevents. | 
| FocusEvent Represents a native focus event. | 
| FocusHandler Handler interface for  FocusEventevents. | 
| GestureChangeHandler Handler interface for  GestureChangeEventevents. | 
| GestureEndHandler Handler interface for  GestureEndEventevents. | 
| GestureStartHandler Handler interface for  GestureStartEventevents. | 
| HasAllDragAndDropHandlers This is a convenience interface that includes all drag and drop handlers
 defined by the core GWT system. | 
| HasAllFocusHandlers This is a convenience interface that includes all focus handlers defined by
 the core GWT system. | 
| HasAllGestureHandlers This is a convenience interface that includes all gesture handlers defined by
 the core GWT system. | 
| HasAllKeyHandlers Convenience interface used to implement all key handlers at once. | 
| HasAllMouseHandlers This is a convenience interface that includes all mouse handlers defined by
 the core GWT system. | 
| HasAllTouchHandlers This is a convenience interface that includes all touch handlers defined by
 the core GWT system. | 
| HasBlurHandlers A widget that implements this interface provides registration for
  BlurHandlerinstances. | 
| HasChangeHandlers A widget that implements this interface provides registration for
  ChangeHandlerinstances. | 
| HasClickHandlers A widget that implements this interface provides registration for
  ClickHandlerinstances. | 
| HasDoubleClickHandlers A widget that implements this interface provides registration for
  DoubleClickHandlerinstances. | 
| HasDragEndHandlers A widget that implements this interface provides registration for
  DragEndHandlerinstances. | 
| HasDragEnterHandlers A widget that implements this interface provides registration for
  DragEnterHandlerinstances. | 
| HasDragHandlers A widget that implements this interface provides registration for
  DragHandlerinstances. | 
| HasDragLeaveHandlers A widget that implements this interface provides registration for
  DragLeaveHandlerinstances. | 
| HasDragOverHandlers A widget that implements this interface provides registration for
  DragOverHandlerinstances. | 
| HasDragStartHandlers A widget that implements this interface provides registration for
  DragStartHandlerinstances. | 
| HasDropHandlers A widget that implements this interface provides registration for
  DropHandlerinstances. | 
| HasErrorHandlers A widget that implements this interface provides registration for
  ErrorHandlerinstances. | 
| HasFocusHandlers A widget that implements this interface provides registration for
  FocusHandlerinstances. | 
| HasGestureChangeHandlers A widget that implements this interface provides registration for
  GestureChangeHandlerinstances. | 
| HasGestureEndHandlers A widget that implements this interface provides registration for
  GestureEndHandlerinstances. | 
| HasGestureStartHandlers A widget that implements this interface provides registration for
  GestureStartHandlerinstances. | 
| HasKeyDownHandlers A widget that implements this interface provides registration for
  KeyDownHandlerinstances. | 
| HasKeyPressHandlers A widget that implements this interface provides registration for
  KeyPressHandlerinstances. | 
| HasKeyUpHandlers A widget that implements this interface provides registration for
  KeyUpHandlerinstances. | 
| HasLoadHandlers A widget that implements this interface provides registration for
  LoadHandlerinstances. | 
| HasMouseDownHandlers A widget that implements this interface provides registration for
  MouseDownHandlerinstances. | 
| HasMouseMoveHandlers A widget that implements this interface provides registration for
  MouseMoveHandlerinstances. | 
| HasMouseOutHandlers A widget that implements this interface provides registration for
  MouseOutHandlerinstances. | 
| HasMouseOverHandlers A widget that implements this interface provides registration for
  MouseOverHandlerinstances. | 
| HasMouseUpHandlers A widget that implements this interface provides registration for
  MouseUpHandlerinstances. | 
| HasMouseWheelHandlers A widget that implements this interface provides registration for
  MouseWheelHandlerinstances. | 
| HasScrollHandlers A widget that implements this interface provides registration for
  ScrollHandlerinstances. | 
| HasTouchCancelHandlers A widget that implements this interface provides registration for
  TouchCancelHandlerinstances. | 
| HasTouchEndHandlers A widget that implements this interface provides registration for
  TouchEndHandlerinstances. | 
| HasTouchMoveHandlers A widget that implements this interface provides registration for
  TouchMoveHandlerinstances. | 
| HasTouchStartHandlers A widget that implements this interface provides registration for
  TouchStartHandlerinstances. | 
| KeyDownEvent Represents a native key down event. | 
| KeyDownHandler Handler interface for  KeyDownEventevents. | 
| KeyPressEvent Represents a native key press event. | 
| KeyPressHandler Handler interface for  KeyPressEventevents. | 
| KeyUpEvent Represents a native key up event. | 
| KeyUpHandler Handler interface for  KeyUpEventevents. | 
| LoadEvent Represents a native load event. | 
| LoadHandler Handler interface for  LoadEventevents. | 
| MouseDownEvent Represents a native mouse down event. | 
| MouseDownHandler Handler interface for  MouseDownEventevents. | 
| MouseMoveEvent Represents a native mouse move event. | 
| MouseMoveHandler Handler interface for  MouseMoveEventevents. | 
| MouseOutEvent Represents a native mouse out event. | 
| MouseOutHandler Handler interface for  MouseOutEventevents. | 
| MouseOverEvent Represents a native mouse over event. | 
| MouseOverHandler Handler interface for  MouseOverEventevents. | 
| MouseUpEvent Represents a native mouse up event. | 
| MouseUpHandler Handler interface for  MouseUpEventevents. | 
| MouseWheelEvent Represents a native mouse wheel event. | 
| MouseWheelHandler Handler interface for  MouseWheelEventevents. | 
| ScrollEvent Represents a native scroll event. | 
| ScrollHandler Handler interface for  ScrollEventevents. | 
| TouchCancelHandler Handler interface for  TouchCancelEventevents. | 
| TouchEndHandler Handler interface for  TouchEndEventevents. | 
| TouchMoveHandler Handler interface for  TouchMoveEventevents. | 
| TouchStartHandler Handler interface for  TouchStartEventevents. | 
| Class and Description | 
|---|
| HasAllDragAndDropHandlers This is a convenience interface that includes all drag and drop handlers
 defined by the core GWT system. | 
| HasClickHandlers A widget that implements this interface provides registration for
  ClickHandlerinstances. | 
| HasDoubleClickHandlers A widget that implements this interface provides registration for
  DoubleClickHandlerinstances. | 
| HasDragEndHandlers A widget that implements this interface provides registration for
  DragEndHandlerinstances. | 
| HasDragEnterHandlers A widget that implements this interface provides registration for
  DragEnterHandlerinstances. | 
| HasDragHandlers A widget that implements this interface provides registration for
  DragHandlerinstances. | 
| HasDragLeaveHandlers A widget that implements this interface provides registration for
  DragLeaveHandlerinstances. | 
| HasDragOverHandlers A widget that implements this interface provides registration for
  DragOverHandlerinstances. | 
| HasDragStartHandlers A widget that implements this interface provides registration for
  DragStartHandlerinstances. | 
| HasDropHandlers A widget that implements this interface provides registration for
  DropHandlerinstances. |