JLine.cc

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#include <string>
#include <iostream>

#include "TROOT.h"
#include "TFile.h"
#include "TLine.h"

#include "Jeep/JProperties.hh"
#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"


/**
 * Auxiliary data structure for line.
 */
struct JLine {

  /**
   * Read line from input stream.
   *
   * \param  in         input stream
   * \param  line       line
   * \return            input stream
   */
  friend inline std::istream& operator>>(std::istream& in, JLine& line)
  {
    return in >> line.x1 >> line.y1 >> line.x2 >> line.y2;
  }

  /**
   * Write line to output stream.
   *
   * \param  out        output stream
   * \param  line       line
   * \return            output stream
   */
  friend inline std::ostream& operator<<(std::ostream& out, const JLine& line)
  {
    return out << line.x1 << ' ' << line.y1 << ' ' << line.x2 << ' ' << line.y2;
  }
  
  double x1;
  double y1;
  double x2;
  double y2;
};


/**
 * \file
 * Auxiliary program to create TLine.
 * \author mdejong
 */
int main(int argc, char **argv)
{
  using namespace std;

  string         outputFile;
  JLine          parameters;
  Color_t        color        = kBlack;
  Style_t        style        = kSolid;
  Width_t        width        = 2;
  int            debug;

  try {

    JProperties properties;

    properties.insert(gmake_property(color));
    properties.insert(gmake_property(style));
    properties.insert(gmake_property(width));

    JParser<> zap("Auxiliary program to create TLine.");

    zap['o'] = make_field(outputFile);
    zap['p'] = make_field(parameters,   "x1 y1 x2 y2");
    zap['@'] = make_field(properties,   "line attributes")  =  JPARSER::initialised();
    zap['d'] = make_field(debug)        = 1;

    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }


  TFile out(outputFile.c_str(), "recreate");

  TLine* p = new TLine(parameters.x1, parameters.y1, parameters.x2, parameters.y2);

  p->SetLineColor(color);
  p->SetLineStyle(style);
  p->SetLineWidth(width);

  out.WriteTObject(p);
  
  out.Write();
  out.Close();
}