how to bundle handlers in the handlerManager? - events

Question

is there a option to bundle different eventhandler in one javafile?
Like:
public interface MyHandlerr extends EventHandler {
void myEvent1(Event1 event);
void myEvent2(Event2 event);
}
in the moment i have for each event one handler....but i'm not happy with it.
greetz

Answer 1

You can create your own EventHandler interface for handling multiple events
public interface MultipleEventsHandler extends EventHandler {
void onMyEvent(MyEvent event);
void onMyOtherEvent(MyOtherEvent event);
}
Then in your event classes you can define which of the methods should be called
public class MyEvent extends GwtEvent<MultipleEventsHandler> {
public static final Type<MultipleEventsHandler> TYPE = new Type<MultipleEventsHandler>();
#Override
public Type<MultipleEventsHandler> getAssociatedType() {
return TYPE;
}
#Override
protected void dispatch(MultipleEventsHandler handler) {
handler.onMyEvent(this);
}
}
public class MyOtherEvent extends GwtEvent<MultipleEventsHandler> {
public static final Type<MultipleEventsHandler> TYPE = new Type<MultipleEventsHandler>();
#Override
public Type<MultipleEventsHandler> getAssociatedType() {
return TYPE;
}
#Override
protected void dispatch(MultipleEventsHandler handler) {
handler.onMyOtherEvent(this);
}
}
If you just want to reduce number of classes/interfaces then you can put EventHandler's inside your event classes, e.g.
public class MyEvent extends GwtEvent<MyEvent.Handler> {
public interface Handler extends EventHandler {
void onMyEvent(SomeEvent event);
}
public static final Type<MyEvent.Handler> TYPE = new Type<MyEvent.Handler>();
#Override
public Type<MyEvent.Handler> getAssociatedType() {
return TYPE;
}
#Override
protected void dispatch(MyEvent.Handler handler) {
handler.onMyOtherEvent(this);
}
}