Arduino-esp32: Implement std::function variants of WiFi.onEvent similar to ESP8266

[PhracturedBlue]

Description:

Could we get equivalent functions as the ESP8266 has for WiFi events:

WiFiEventHandler onStationModeConnected(std::function<void(const WiFiEventStationModeConnected&)>);
WiFiEventHandler onStationModeDisconnected(std::function<void(const WiFiEventStationModeDisconnected&)>);
WiFiEventHandler onStationModeAuthModeChanged(std::function<void(const WiFiEventStationModeAuthModeChanged&)>);
WiFiEventHandler onStationModeGotIP(std::function<void(const WiFiEventStationModeGotIP&)>);
WiFiEventHandler onStationModeDHCPTimeout(std::function<void(void)>);
WiFiEventHandler onSoftAPModeStationConnected(std::function<void(const WiFiEventSoftAPModeStationConnected&)>);
WiFiEventHandler onSoftAPModeStationDisconnected(std::function<void(const WiFiEventSoftAPModeStationDisconnected&)>);

These functions allow using std::function, which allows handling events in class functions cleanly.

[sticilface]

I would second this. :)

[timpur]

Any progress on this? Thinking of implementing.

[tripflex]

Yes I third this, not only for functionality but also for easy porting of ESP8266 projects over to ESP32 👍

[aluis-rcastro]

Any update on this ?

[timpur]

Think this now supported with #1366.

See this for example: https://github.com/timpur/arduino-esp32/blob/d72e8137b3933470bfa8292e801389064fd8d001/libraries/WiFi/examples/WiFiClientEvents/WiFiClientEvents.ino#L78

[ristomatti]

@timpur This probably would not solve the portability of ESP8266 projects @tripflex mentioned as there's not separate functions for each event but at least I find this new approach much more versatile and clean.

[wfraga18]

I need too

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[stale[bot]]

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