CO2_Gadget_Buttons.h

#ifndef CO2_Gadget_Buttons_h
#define CO2_Gadget_Buttons_h

#include "Button2.h"
#undef LONGCLICK_TIME_MS
#define LONGCLICK_TIME_MS 300  // https://github.com/LennartHennigs/Button2/issues/10
Button2 btnUp(BTN_UP);         // Initialize the up button
Button2 btnDwn(BTN_DWN);       // Initialize the down button

void IRAM_ATTR buttonUpISR() {
    if (actualDisplayBrightness == 0) {  // Turn on the display only if it's OFF
        shouldWakeUpDisplay = true;
        lastTimeButtonPressed = millis();
    }
    if (!menuInitialized) {  // If the menu is not initialized yet, initialize it now (disable Improv WiFi functionality)
        mustInitMenu = true;
        publishMQTTLogData("-->[BUTT] mustInitMenu: " + String(mustInitMenu));
    }
}

void IRAM_ATTR buttonDownISR() {
    if (actualDisplayBrightness == 0) {  // Turn on the display only if it's OFF
        shouldWakeUpDisplay = true;
        lastTimeButtonPressed = millis();
    }
    if (!menuInitialized) {  // If the menu is not initialized yet, initialize it now (disable Improv WiFi functionality)
        mustInitMenu = true;
        publishMQTTLogData("-->[BUTT] mustInitMenu: " + String(mustInitMenu));
    }
}

// void doubleClick(Button2& btn) {
//   Serial.println("-->[BUTT] Test double click...");
//   displayNotification("Test functionality", "double click", notifyInfo);
// }

void initButtons() {
    // Set Interrupt Service Routine to turn on the display on button UP or DOWN press (nothing to do with the button functionality for the menu itself)
    #if BTN_UP != -1
    attachInterrupt(BTN_UP, buttonUpISR, RISING);
    #endif
    #if BTN_DWN != -1
    // attachInterrupt(BTN_DWN, buttonUpISR, RISING); // Conflicts with Improv because of GPIO 0 
    #endif

    btnUp.setLongClickTime(LONGCLICK_TIME_MS);
    btnUp.setLongClickHandler([](Button2 &b) { nav.doNav(enterCmd); });
    btnUp.setClickHandler([](Button2 &b) {
        // Up
        nav.doNav(downCmd);
    });

    btnDwn.setLongClickTime(LONGCLICK_TIME_MS);
    btnDwn.setLongClickHandler([](Button2 &b) { nav.doNav(escCmd); });
    btnDwn.setClickHandler([](Button2 &b) {
        // Down
        nav.doNav(upCmd);
    });

    if (displayReverse) {
        reverseButtons(true);
    }

    // btnDwn.setDoubleClickHandler(doubleClick);
}

void reverseButtons(bool reversed) {
    if (reversed) {
        // Interrupt Service Routine to turn on the display on button UP press
        attachInterrupt(BTN_UP, buttonUpISR, RISING);
        btnDwn.setLongClickTime(LONGCLICK_TIME_MS);
        btnDwn.setLongClickHandler([](Button2 &b) { nav.doNav(enterCmd); });
        btnDwn.setClickHandler([](Button2 &b) {
            // Up
            nav.doNav(downCmd);
        });

        btnUp.setLongClickTime(LONGCLICK_TIME_MS);
        btnUp.setLongClickHandler([](Button2 &b) { nav.doNav(escCmd); });
        btnUp.setClickHandler([](Button2 &b) {
            // Down
            nav.doNav(upCmd);
        });
    } else {
        attachInterrupt(BTN_DWN, buttonUpISR, RISING);
        btnUp.setLongClickTime(LONGCLICK_TIME_MS);
        btnUp.setLongClickHandler([](Button2 &b) { nav.doNav(enterCmd); });
        btnUp.setClickHandler([](Button2 &b) {
            // Up
            nav.doNav(downCmd);
        });

        btnDwn.setLongClickTime(LONGCLICK_TIME_MS);
        btnDwn.setLongClickHandler([](Button2 &b) { nav.doNav(escCmd); });
        btnDwn.setClickHandler([](Button2 &b) {
            // Down
            nav.doNav(upCmd);
        });
    }
}

void buttonsLoop() {
    // Check for button presses
    btnUp.loop();
    btnDwn.loop();
}

#endif  // CO2_Gadget_Buttons_h