vtkFollowerTextPropertyAdaptor.h

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

#include "vtkCallbackCommand.h"
#include "vtkNew.h"         // for vtkNew
#include "vtkWeakPointer.h" // for vtkSmartPointer

VTK_ABI_NAMESPACE_BEGIN

class vtkAxisFollower;
class vtkProperty;
class vtkProp3DAxisFollower;
class vtkTextProperty;

class vtkFollowerTextPropertyAdaptor
{
public:
  vtkFollowerTextPropertyAdaptor(vtkAxisFollower* follower, vtkProp3DAxisFollower* propFollower);
  virtual ~vtkFollowerTextPropertyAdaptor();

  static void OnModified(vtkObject*, unsigned long, void* clientData, void*);

  void UpdateProperty(vtkTextProperty* textProp, vtkProperty* actorProperty);

  void SetScale(double scale);

  [[nodiscard]] double GetFontScale();

private:
  vtkAxisFollower* MapperFollower;
  vtkProp3DAxisFollower* PropFollower;
  double FontScale = 1;

  unsigned int TextPropObserverId = 0;
  vtkNew<vtkCallbackCommand> ModifiedCallback;
  vtkWeakPointer<vtkTextProperty> ObservedProperty;
};

VTK_ABI_NAMESPACE_END
#endif