HasErrorHandlers abstract class / dart_web_toolkit_event Library / API Reference / Dart Web Toolkit

HasErrorHandlers abstract class

A widget that implements this interface provides registration for {@link ErrorHandler} instances.

abstract class HasErrorHandlers extends HasHandlers {
 /**
  * Adds an {@link ErrorEvent} handler.
  *
  * @param handler the error handler
  * @return {@link HandlerRegistration} used to remove this handler
  */
 HandlerRegistration addErrorHandler(ErrorHandler handler);
}

Extends

HasHandlers > HasErrorHandlers

Subclasses

Image

Methods

abstract HandlerRegistration addErrorHandler(ErrorHandler handler) #

Adds an {@link ErrorEvent} handler.

@param handler the error handler @return {@link HandlerRegistration} used to remove this handler

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