How do I statements for the various conditions of this function?
You will have to explicitely expand the case ClickEncoder::Pressed. So instead of 

VERBOSECASE(ClickEncoder::Pressed);


you should write something like

case ClickEncoder::Pressed:
    Serial.println("ClickEncoder::Pressed");
    digitalWrite(ledpin, HIGH);
    break;


Of course then you'll have to turn it off then, but.. Well, that's another problem