CLineShape.h

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// SPDX-License-Identifier: LGPL-2.1-or-later OR GPL-2.0-or-later OR GPL-3.0-or-later OR LicenseRef-ACF-Commercial
#pragma once
 
 
#include <i2d/CVector2d.h>
#include <i2d/CLine2d.h>
 
#include <iview/CInteractiveShapeBase.h>
 
 
namespace iview
{
 
 
class CLineShape: public CInteractiveShapeBase
{
public:
       typedef CInteractiveShapeBase BaseClass;
 
       CLineShape();
 
       enum LineDisplayMode
       {
              LDM_SIMPLE,
              LDM_ARROW
       };
 
       int GetLineDisplayMode() const;
       void SetLineDisplayMode(int mode);
 
       double GetArrowLinesProportion() const;
       void SetArrowLinesProportion(double value);
 
       double GetMaxArrowLineLength() const;
       void SetMaxArrowLineLength(double value);
 
       // reimplemented (iview::CInteractiveShapeBase)
       virtual void InvalidateBoundingBox() override;
 
       // reimplemented (iview::ITouchable)
       virtual TouchState IsTouched(istd::CIndex2d position) const override;
 
       // reimplemented (iview::IVisualizable)
       virtual void Draw(QPainter& drawContext) const override;
 
       // reimplemented (imod::IObserver)
       virtual bool OnModelAttached(imod::IModel* modelPtr, istd::IChangeable::ChangeSet& changeMask) override;
 
       // reimplemented (iview::IMouseActionObserver)
       virtual bool OnMouseButton(istd::CIndex2d position, Qt::MouseButton buttonType, bool downFlag) override;
       virtual bool OnMouseMove(istd::CIndex2d position) override;
 
protected:
       void EnsurePointsAreValid() const;
       void EnsurePointsAreValid(const i2d::CLine2d& line) const;
       void CalcPoints(const i2d::CLine2d& line) const;
       void ResetPoints() const;
 
       // reimplemented (iview::CShapeBase)
       virtual i2d::CRect CalcBoundingBox() const override;
 
       // reimplemented (iview::CInteractiveShapeBase)
       virtual void BeginLogDrag(const i2d::CVector2d& reference) override;
       virtual void SetLogDragPosition(const i2d::CVector2d& position) override;
 
       // static methods
       static bool CheckLine(
                                   const istd::CIndex2d& firstPoint,
                                   const istd::CIndex2d& secondPoint,
                                   const istd::CIndex2d& point,
                                   double maxDistance);
 
       int m_lineDisplayMode;
       double m_arrowLinesProportion;
       double m_maxArrowLineLength;
 
       i2d::CVector2d m_referencePosition;
       int m_referenceIndex;
       mutable istd::CIndex2d m_points[4];
       mutable bool m_arePointsValid;
};
 
 
// inline methods
 
inline void CLineShape::EnsurePointsAreValid() const
{
       if (!m_arePointsValid){
              const i2d::CLine2d* linePtr = dynamic_cast<const i2d::CLine2d*>(GetObservedModel());
              if (linePtr != NULL){
                     CalcPoints(*linePtr);
              }
              else{
                     ResetPoints();
              }
              m_arePointsValid = true;
       }
}
 
 
inline void CLineShape::EnsurePointsAreValid(const i2d::CLine2d& line) const
{
       if (!m_arePointsValid){
              CalcPoints(line);
              m_arePointsValid = true;
       }
}
 
 
} // namespace iview