[idea] Connect SignalRelay to signals only when have callback

pyapp-kit / psygnal

Python observer pattern (callback/event system). Modeled after Qt Signals & Slots (but independent of Qt)

https://psygnal.readthedocs.io/

BSD 3-Clause "New" or "Revised" License

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Closed Czaki closed 8 months ago

Czaki commented 8 months ago

Currently, SignalRelay is always connected to all signals in SignalGroup. It means that emitting an event always triggers some callback.

Maybe SignalRelay should connect itself to all signals in a group only if something is connected to it itself?