/usr/include/vtk-6.3/vtkPlotGrid.h is in libvtk6-dev 6.3.0+dfsg1-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | /*=========================================================================
  Program:   Visualization Toolkit
  Module:    vtkPlotGrid.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.
=========================================================================*/
// .NAME vtkPlotGrid - takes care of drawing the plot grid
//
// .SECTION Description
// The vtkPlotGrid is drawn in screen coordinates. It is usually one of the
// first elements of a chart to be drawn, and will generally be obscured
// by all other elements of the chart. It builds up its own plot locations
// from the parameters of the x and y axis of the plot.
#ifndef vtkPlotGrid_h
#define vtkPlotGrid_h
#include "vtkChartsCoreModule.h" // For export macro
#include "vtkContextItem.h"
class vtkStdString;
class vtkContext2D;
class vtkPoints2D;
class vtkAxis;
class VTKCHARTSCORE_EXPORT vtkPlotGrid : public vtkContextItem
{
public:
  vtkTypeMacro(vtkPlotGrid, vtkContextItem);
  virtual void PrintSelf(ostream &os, vtkIndent indent);
  // Description:
  // Creates a 2D Chart object.
  static vtkPlotGrid *New();
  // Description:
  // Set the X axis of the grid.
  virtual void SetXAxis(vtkAxis *axis);
  // Description:
  // Set the X axis of the grid.
  virtual void SetYAxis(vtkAxis *axis);
  // Description:
  // Paint event for the axis, called whenever the axis needs to be drawn
  virtual bool Paint(vtkContext2D *painter);
//BTX
protected:
  vtkPlotGrid();
  ~vtkPlotGrid();
  // Description:
  // The vtkAxis objects are used to figure out where the grid lines should be
  // drawn.
  vtkAxis *XAxis;
  vtkAxis *YAxis;
private:
  vtkPlotGrid(const vtkPlotGrid &); // Not implemented.
  void operator=(const vtkPlotGrid &);   // Not implemented.
//ETX
};
#endif //vtkPlotGrid_h
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