Function selectionDecorator

qcustomplot/qcustomplot.h:3325–3325

  bool selected() const { return !mSelection.isEmpty(); }
  QCPDataSelection selection() const { return mSelection; }
  QCPSelectionDecorator *selectionDecorator() const { return mSelectionDecorator; }
  
  // setters:
  void setName(const QString &name);