It's old, but check the comments at
http://wanderingcanadian.ca/2010/11/05/hello-mvp-with-gin/

On 5 January 2016 at 16:15, Richa <[email protected]> wrote:

> Thanks Troncoso.
> I get what you say, and agree that its not a very good approach.
> But my concern is, For a huge application having around 200 events . Will
> I have to write 200 Event handlers, 200 Event Classes and Event types ?
>
> On Tue, Jan 5, 2016 at 4:55 PM, N Troncoso <[email protected]>
> wrote:
>
>> You could technically do that, but you'd need some way to differentiate
>> between events; Maybe with an enum:
>>
>> public class MyEvent extends GwtEvent<MyEvent.Handler>
>> {
>>     public static enum EventTypes
>>     {
>>         THIS_EVENT,
>>         THAT_EVENT;
>>     };
>>
>>     public interface Handler extends EventHandler
>>     {
>>         void onDispatch(MyEvent event);
>>     }
>>
>>     public static final GwtEvent.Type<Handler> TYPE = new
>> GwtEvent.Type<>(); // NOSONAR
>>
>>     private final EventTypes type;
>>     public MyEvent(EventTypes type)
>>     {
>>         this.type = type;
>>     }
>>
>>     @Override
>>     public GwtEvent.Type<Handler> getAssociatedType()
>>     {
>>         return TYPE;
>>     }
>>
>>     public EventTypes getType()
>>     {
>>         return type;
>>     }
>>
>>     @Override
>>     protected void dispatch(Handler handler)
>>     {
>>         handler.onDispatch(this);
>>     }
>> }
>>
>> I don't think this is a very good approach, though, as you lose the
>> ability to pass specific parameters based on that particular kind of event.
>>
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