disableControls method

Implementation

void disableControls() {
  if (_disableControlsCount == 0) {
    // { Save current state, needed to detect change of state when
    //   enabling controls. } (original comment kept as-is)
    _disableControlsState = _state;
    _enableControlsEvent = TDataEvent.deDataSetChange;
  }
  _disableControlsCount++;
}