vtkQtLabelRenderStrategy.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkQtLabelRenderStrategy.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef vtkQtLabelRenderStrategy_h
#define vtkQtLabelRenderStrategy_h

#include "vtkRenderingQtModule.h" // For export macro
#include "vtkLabelRenderStrategy.h"

class vtkLabelSizeCalculator;
class vtkLabeledDataMapper;
class vtkPlaneSource;
class vtkPolyDataMapper2D;
class vtkQImageToImageSource;
class vtkTexture;
class vtkTexturedActor2D;
class vtkTextureMapToPlane;

class VTKRENDERINGQT_EXPORT vtkQtLabelRenderStrategy : public vtkLabelRenderStrategy
{
 public:
  void PrintSelf(ostream& os, vtkIndent indent) override;
  vtkTypeMacro(vtkQtLabelRenderStrategy, vtkLabelRenderStrategy);
  static vtkQtLabelRenderStrategy* New();

  void ComputeLabelBounds(vtkTextProperty* tprop, vtkStdString label,
                                  double bds[4]) override
    { this->Superclass::ComputeLabelBounds(tprop, label, bds); }
  void ComputeLabelBounds(vtkTextProperty* tprop, vtkUnicodeString label,
                                  double bds[4]) override;


  void RenderLabel(int x[2], vtkTextProperty* tprop, vtkStdString label) override
    { this->Superclass::RenderLabel(x, tprop, label); }
  void RenderLabel(int x[2], vtkTextProperty* tprop, vtkStdString label,
                           int maxWidth) override
    { this->Superclass::RenderLabel(x, tprop, label, maxWidth); }
  void RenderLabel(int x[2], vtkTextProperty* tprop,
                           vtkUnicodeString label) override;
  void RenderLabel(int x[2], vtkTextProperty* tprop,
                           vtkUnicodeString label, int maxWidth) override;

  void StartFrame() override;

  void EndFrame() override;

  void ReleaseGraphicsResources(vtkWindow *window) override;

protected:
  vtkQtLabelRenderStrategy();
  ~vtkQtLabelRenderStrategy() override;

  class Internals;
  Internals* Implementation;

  vtkQImageToImageSource* QImageToImage;
  vtkPlaneSource* PlaneSource;
  vtkTextureMapToPlane* TextureMapToPlane;
  vtkTexture* Texture;
  vtkPolyDataMapper2D* Mapper;
  vtkTexturedActor2D* Actor;
  bool AntialiasText; // Should the text be antialiased, inherited from render window.

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

#endif