Interface CloseHandler<C>

Type Parameters:

C - The type of the component.

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface CloseHandler<C>

Functional interface for handling close events in a component. Provides a two-phase protocol: shouldClose(C, List, Event, boolean) is called first to determine whether the close action should proceed, and onClose(Event, C) is called if it should.

Method Summary

Modifier and Type	Method	Description
static <C> void	fireEvent(C component, List<CloseHandler<C>> closeHandler, Event event, boolean fireEvent)	Helper method which calls onClose(Event, Object), if fireEvent is true and a close handler has been defined.
void	onClose(Event event, C component)	Called if shouldClose(Event, Object) returned true
static <C> boolean	shouldClose(C component, List<CloseHandler<C>> closeHandler, Event event, boolean fireEvent)	Helper method which returns the result of shouldClose(Event, Object), if fireEvent is true and a close handler has been defined, otherwise true.
default boolean	shouldClose(Event event, C component)	Default implementation returns true

Method Details

shouldClose

static <C> boolean shouldClose(C component,
 List<CloseHandler<C>> closeHandler,
 Event event,
 boolean fireEvent)

Helper method which returns the result of shouldClose(Event, Object), if fireEvent is true and a close handler has been defined, otherwise true.

fireEvent

static <C> void fireEvent(C component,
 List<CloseHandler<C>> closeHandler,
 Event event,
 boolean fireEvent)

Helper method which calls onClose(Event, Object), if fireEvent is true and a close handler has been defined.

shouldClose

default boolean shouldClose(Event event,
 C component)

Default implementation returns true

onClose

void onClose(Event event,
 C component)

Called if shouldClose(Event, Object) returned true