toggleActive method

void toggleActive()

Implementation

void toggleActive() {
  final v = _visibleOf(_activeMaster);
  final r = v < 0 ? 0 : v;
  if (_isRowMode) {
    selectRowAt(r, additive: _isMulti);
  } else if (_isCellMode) {
    selectCellAt(r, _activeCol, additive: _isMulti);
  }
}