vtkLabelRenderStrategy.h

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

#include "vtkObject.h"
#include "vtkRenderingLabelModule.h" // For export macro
#include "vtkWrappingHints.h"        // For VTK_MARSHALAUTO

#include "vtkStdString.h" // For string support

VTK_ABI_NAMESPACE_BEGIN
class vtkRenderer;
class vtkWindow;
class vtkTextProperty;

class VTKRENDERINGLABEL_EXPORT VTK_MARSHALAUTO vtkLabelRenderStrategy : public vtkObject
{
public:
  void PrintSelf(ostream& os, vtkIndent indent) override;
  vtkTypeMacro(vtkLabelRenderStrategy, vtkObject);

  virtual bool SupportsRotation() { return true; }

  virtual bool SupportsBoundedSize() { return true; }


  virtual void SetRenderer(vtkRenderer* ren);
  vtkGetObjectMacro(Renderer, vtkRenderer);


  virtual void SetDefaultTextProperty(vtkTextProperty* tprop);
  vtkGetObjectMacro(DefaultTextProperty, vtkTextProperty);

  virtual void ComputeLabelBounds(vtkTextProperty* tprop, vtkStdString label, double bds[4]) = 0;

  virtual void RenderLabel(int x[2], vtkTextProperty* tprop, vtkStdString label) = 0;
  virtual void RenderLabel(
    int x[2], vtkTextProperty* tprop, vtkStdString label, int vtkNotUsed(maxWidth))
  {
    this->RenderLabel(x, tprop, label);
  }

  virtual void StartFrame() {}

  virtual void EndFrame() {}

  virtual void ReleaseGraphicsResources(vtkWindow*) {}

protected:
  vtkLabelRenderStrategy();
  ~vtkLabelRenderStrategy() override;

  vtkRenderer* Renderer;
  vtkTextProperty* DefaultTextProperty;

private:
  vtkLabelRenderStrategy(const vtkLabelRenderStrategy&) = delete;
  void operator=(const vtkLabelRenderStrategy&) = delete;
};

VTK_ABI_NAMESPACE_END
#endif