bar.h

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#ifndef __PBC_BAR__
#define __PBC_BAR__

#include <pixelplace.h>
#include <qgl.h>
#include <datachannel.h>

using namespace std;



class Bar {

public:
  Bar(int iTimeStep);  // each bar draws one timestep
  ~Bar();
  void Draw();
  void SetNumData(int iNum);
  
  void SetOxData(DataChannel* pOxChannel);
  void SetOyData(DataChannel* pOxChannel);
  void SetColorData(DataChannel* pOxChannel);
  void SetBrush(float* pBrush);
  void EnableBrushing(bool bEnableBrushing);
  
  void PlacePixels();
  int GetIdAt(int iX, int iY);
  
  int GetWidth();
  int GetHeight();
  
 private:
  DataChannel* m_pOxChannel;
  DataChannel* m_pOyChannel;
  DataChannel* m_pColorChannel;

  float* m_pBrush;
  bool m_bEnableBrushing;
    
  GLubyte* m_pBarBuffer;
  int* m_pIds;
  
  int    m_iNumData;                    // number of data items to display
  int    m_iTimeStep;
  
  bool m_bDataChanged;
  bool m_bColorChanged;
  bool m_bInit;
  
  int m_iWidth;
  int m_iHeight;
  int m_iTextureWidth;
  int m_iTextureHeight;
};

#endif // __PBC_BAR__

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