timed button press?

Projects Programming
1

I'm looking for an elegant way to add timed press to this. Right now this toggles on each press. I'd like it to toggle only after holding down for 1 second. Do you see a nice way to add that?

(I've skipped the variable definitions here for simplicity)

void loop() 
{
  mode_switch_reading = digitalRead(mode_switch);

  if (mode_switch_reading == LOW && previous_mode_switch_reading == HIGH && millis() - last_debounce_time_for_mode_switch > defined_debounce_time) 

  {
    last_debounce_time_for_mode_switch = millis(); 

    if (mode_switch_state == LOW) 
    {      
      mode_switch_state = HIGH;
    }  

    else  // HIGH, so make it low
    {
      mode_switch_state = LOW;
    }
  }

  previous_mode_switch_reading = mode_switch_reading;
}
2

And if you make defined_debounce_time equal to 1000?

3

Do you see a nice way to add that?

You detect a change in state. You record when the transition to pressed happens. You record when the transition to released happens. When the transition to released happens, you see if that time is more than one second later than the transition to pressed time. If so, you do whatever the long press means. If not, you do whatever a short press means (which could be nothing).