state: _init_event_handlers recursively

[masenf]

Allow event handlers defined in parent states to be directly called from substates.

Previously, only event handlers defined on the substate could be called on the substate. A workaround for queueing event handlers defined in a parent state was to explicitly return/yield the event handler/spec (return State.handlerA())

import reflex as rx


class State(rx.State):
    def handlerA(self):
        print("handlerA")


class Substate(State):
    def handlerB(self):
        self.handlerA()  # does NOT work before this change
        print("handlerB")
        self.handlerC()
        return State.handlerA()  # does work

    def handlerC(self):
        print("handlerC")


def index() -> rx.Component:
    return rx.vstack(
        rx.button("click", on_click=Substate.handlerB),
        padding_top="10%",
    )


app = rx.App()
app.add_page(index)
app.compile()

Before this change, the output is

handlerB
handlerC
handlerA

After this change, the output is

handlerA
handlerB
handlerC
handlerA

Reported in discord by community member Samsam

[picklelo]

nice!