HasValueChangeHandlers<T> abstract class
A widget that implements this interface is a public source of {@link ValueChangeEvent} events.
@param <T> the value about to be changed
abstract class HasValueChangeHandlers<T> extends HasHandlers { /** * Adds a {@link ValueChangeEvent} handler. * * @param handler the handler * @return the registration for the event */ HandlerRegistration addValueChangeHandler(ValueChangeHandler<T> handler); }
Extends
HasHandlers > HasValueChangeHandlers<T>
Subclasses
Methods
abstract HandlerRegistration addValueChangeHandler(ValueChangeHandler<T> handler) #
Adds a {@link ValueChangeEvent} handler.
@param handler the handler @return the registration for the event
abstract void fireEvent(DwtEvent event) #
inherited from HasHandlers
Fires the given event to the handlers listening to the event's type.
Any exceptions thrown by handlers will be bundled into a UmbrellaException and then re-thrown after all handlers have completed. An exception thrown by a handler will not prevent other handlers from executing.
@param event the event