@idk-my-name
Indeed something like that.
val eventClass = method.parameterTypes[0] as Class<out Event>
val eventTarget = method.getAnnotation(EventTarget::class.java)
Unfortunately, nashorn/reflection does not have any capability of adding annotations.
method.getAnnotation(EventTarget::class.java)
and we will have to make our own registerListener().
The 3 lines actually does the work is here.
val invokableEventTargets = registry.getOrDefault(eventClass, ArrayList())
invokableEventTargets.add(EventHook(listener, method, eventTarget))
registry[eventClass] = invokableEventTargets
You only need to convert this 3 line to js and it would be fine.
Note the second line
EventHook(listener, method, eventTarget)
the listener is just the listener,
the method is accept acquired using reflection
but for the eventTarget, I borrowed it with reflection from a function in other class that extends Listener already presented in LB.
As for the performance issue, it's true, in my case, putting a print every time it is called makes the frame rate goes from 80(limited) to less than 1.
