invalid use of non-static member function 'void Interface::handleEvent(ace_button::AceButton*, uint8_t, uint8_t)'

[Sercurio]

Hello,

I try to instantiate a ButtonConfig in a member class function but I get the following error.

It is possible to do this pattern ?

class Test {
    private:
        AceButton button1 = AceButton(1);
        void configure();
        void handleEvent(AceButton *, uint8_t, uint8_t);
};

#include <Test.h>

void Test::configure(){
     pinMode(1, INPUT_PULLUP);
     ButtonConfig *buttonConfig = ButtonConfig::getSystemButtonConfig();
     buttonConfig->setEventHandler(handleEvent);
     buttonConfig->setFeature(ButtonConfig::kFeatureClick);
     buttonConfig->setFeature(ButtonConfig::kFeatureLongPress);
     buttonConfig->setFeature(ButtonConfig::kFeatureDoubleClick);
     buttonConfig->setFeature(ButtonConfig::kFeatureRepeatPress);
}

void Test::handleEvent(AceButton *button, uint8_t eventType, uint8_t buttonState){
     switch (button->getPin())
    {
    case 1:
        Serial.println("Hourrray");
        break;
    }
}

Thank you

[bxparks]

Try declaring your Test::handleEvent() as static. The AceButton::setEventHandler() expects a pointer to a plain function, not a pointer to a member function.

[Sercurio]

Yes I tried, but the problem is that I use member variable in my eventHandler function like that:

class Test {
    private:
        AceButton button1 = AceButton(1);
        int counter = 0;
        void configure();
        void handleEvent(AceButton *, uint8_t, uint8_t);
};

#include <Test.h>

void Test::configure(){
     pinMode(1, INPUT_PULLUP);
     ButtonConfig *buttonConfig = ButtonConfig::getSystemButtonConfig();
     buttonConfig->setEventHandler(handleEvent);
     buttonConfig->setFeature(ButtonConfig::kFeatureClick);
     buttonConfig->setFeature(ButtonConfig::kFeatureLongPress);
     buttonConfig->setFeature(ButtonConfig::kFeatureDoubleClick);
     buttonConfig->setFeature(ButtonConfig::kFeatureRepeatPress);
}

void Test::handleEvent(AceButton *button, uint8_t eventType, uint8_t buttonState){
     switch (button->getPin())
    {
    case 1:
        counter+=1;
        break;
    }
}

[bxparks]

Sounds like you need to use the ButtonConfig::setIEventHandler(), as described here:
https://github.com/bxparks/AceButton?tab=readme-ov-file#object-based-event-handler

It will cause a cyclic dependency between your Test object and the AceButton object, which I normally try to avoid. But if you limit the cycle to be within the Test class, it's not too bad. You can break the cyclic dependency by lifting the Test::configure() code out of the Test class.