The ArrowFigure is a subclass of the LineFigure class and reuses the firstPoint and lastPoint fields and some of its functionality. The endpoints of the arrowhead are stored in the leftPoint and rightPoint fields, as shown in the following image. The lengths of the sides are defined by the ArrowLength constant to 500 units, which is 5 millimeters.

The ArrowFigure class overrides some of the methods of the LineFigure class. Mostly, it calls the methods of the LineFigure class and then adds functionality of its own.

ArrowFigure.h

class ArrowFigure : public LineFigure { 
  public: 
    ArrowFigure(const Window* windowPtr); 
    FigureId GetId() const {return ArrowId;}; 
 
    bool IsClick(Point mousePoint); 
    bool IsInside(Rect area); 
    void DoubleClick(Point mousePoint); 

 
    void Modify(Size distanceSize); 
    void Move(Size distanceSize); 
    Rect Area() const; 
    void Draw(Graphics&...