Method valid

gui/qt/keypad/keycode.h:12–12

                                                 ((col & 7) << 0)) {}

    bool valid() const { return mCode >> 6 == 0; }
    unsigned char code() const { return mCode; }
    unsigned char row() const { return (mCode >> 3) & 7; }
    unsigned char col() const { return (mCode >> 0) & 7; }