vtkPlotHistogram2D.h

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

  Program:   Visualization Toolkit
  Module:    vtk2DHistogramItem.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 vtkPlotHistogram2D_h
#define vtkPlotHistogram2D_h

#include "vtkChartsCoreModule.h" // For export macro
#include "vtkPlot.h"
#include "vtkSmartPointer.h"  // Needed for SP ivars
#include "vtkRect.h"          // Needed for vtkRectf

class vtkImageData;
class vtkScalarsToColors;

class VTKCHARTSCORE_EXPORT vtkPlotHistogram2D : public vtkPlot
{
public:
  vtkTypeMacro(vtkPlotHistogram2D, vtkPlot);
  void PrintSelf(ostream &os, vtkIndent indent) override;

  static vtkPlotHistogram2D *New();

  void Update() override;

  bool Paint(vtkContext2D *painter) override;

  virtual void SetInputData(vtkImageData *data, vtkIdType z = 0);
  void SetInputData(vtkTable*) override { }
  void SetInputData(vtkTable*, const vtkStdString&, const vtkStdString&) override { }

  vtkImageData * GetInputImageData();

  void SetTransferFunction(vtkScalarsToColors *transfer);

  vtkScalarsToColors * GetTransferFunction();

  void GetBounds(double bounds[4]) override;

  virtual void SetPosition(const vtkRectf& pos);
  virtual vtkRectf GetPosition();

  vtkStdString GetTooltipLabel(const vtkVector2d &plotPos,
                                       vtkIdType seriesIndex,
                                       vtkIdType segmentIndex) override;

  vtkIdType GetNearestPoint(const vtkVector2f& point,
                                    const vtkVector2f& tolerance,
                                    vtkVector2f* location) override;

protected:
  vtkPlotHistogram2D();
  ~vtkPlotHistogram2D() override;

  void GenerateHistogram();

  vtkSmartPointer<vtkImageData> Input;
  vtkSmartPointer<vtkImageData> Output;
  vtkSmartPointer<vtkScalarsToColors> TransferFunction;
  vtkRectf Position;

private:
  vtkPlotHistogram2D(const vtkPlotHistogram2D &) = delete;
  void operator=(const vtkPlotHistogram2D &) = delete;

};

#endif //vtkPlotHistogram2D_h