vtkPolyLineRepresentation.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkPolyLineRepresentation_h
#define vtkPolyLineRepresentation_h

#include "vtkCurveRepresentation.h"
#include "vtkInteractionWidgetsModule.h" // For export macro
#include "vtkWrappingHints.h"            // For VTK_MARSHALAUTO

VTK_ABI_NAMESPACE_BEGIN
class vtkPolyLineSource;
class vtkPointHandleSource;

class VTKINTERACTIONWIDGETS_EXPORT VTK_MARSHALAUTO vtkPolyLineRepresentation
  : public vtkCurveRepresentation
{
public:
  static vtkPolyLineRepresentation* New();
  vtkTypeMacro(vtkPolyLineRepresentation, vtkCurveRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void GetPolyData(vtkPolyData* pd) override;

  void SetNumberOfHandles(int npts) override;

  vtkDoubleArray* GetHandlePositions() override;

  double GetSummedLength() override;

  void InitializeHandles(vtkPoints* points) override;

  void BuildRepresentation() override;

protected:
  vtkPolyLineRepresentation();
  ~vtkPolyLineRepresentation() override;

  // The poly line source
  vtkNew<vtkPolyLineSource> PolyLineSource;

  int InsertHandleOnLine(double* pos) override;

  void ClearHandles();

  void AllocateHandles(int npts);

  void CreateDefaultHandles(int npts);

  void ReconfigureHandles(int npts);

  // Specialized methods to access handles
  vtkActor* GetHandleActor(int index) override;
  vtkHandleSource* GetHandleSource(int index) override;
  int GetHandleIndex(vtkProp* prop) override;

private:
  vtkPolyLineRepresentation(const vtkPolyLineRepresentation&) = delete;
  void operator=(const vtkPolyLineRepresentation&) = delete;

  // Glyphs representing hot spots (e.g., handles)
  std::vector<vtkSmartPointer<vtkPointHandleSource>> PointHandles;
  std::vector<vtkSmartPointer<vtkActor>> HandleActors;
};

VTK_ABI_NAMESPACE_END
#endif