Method cancel

3rdparty/qcustomplot/qcustomplot.cpp:2903–2910

! If there is currently a selection interaction going on (\ref isActive), the interaction is canceled. The selection rect will emit the \ref canceled signal. */

  canceled. The selection rect will emit the \ref canceled signal.
*/
void QCPSelectionRect::cancel()
{
  if (mActive)
  {
    mActive = false;
    emit canceled(mRect, nullptr);
  }
}

/*! \internal