ZtCurveDev.H

/* ZtCurveDev.H */
/* $Id: ZtCurveDev.H,v 1.2 2004/02/17 13:53:36 vlad Exp $ */
#ifndef __ZtCurveDev_H
#define __ZtCurveDev_H

#include <zm/ZtCurve.H>


/*************************************************************
 * Object for deviation curve drawing in linear or stairs
 * interpolation.  Deviation means setting base level (0 by
 * default) to draw on two sides from it.
 *************************************************************/
class ZtCurveDev : public ZtCurve
{
protected:

  float     dev_level;

public:

  /* Curve constructor.  Argument zdVertical means nyid is arg and
     nxid is function; zdHorizontal means another orientation. */
  ZtCurveDev (ZtMain* pManager,
          ZGroupId pxid, ZGroupId pyid,
          ZGroupId nxid, ZGroupId nyid,
          ZDimension argument);

  /* Context for filling deviation. */
  ZGEnv     fill;

  /* Direct draw procedure: if size, place or parameters are changed */
  virtual void  redraw ();

  /* Set base level for curve */
  void      set_dev_level (float level)
    {
      dev_level = level;
      changes();
    }

  /* Get base level for curve */
  float     get_dev_level () const
    {
      return dev_level;
    }

  virtual const char*   class_id () const;

};


#endif /* ZtCurveDev.H */