TArc.cxx

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// @(#)root/graf:$Id$
// Author: Rene Brun   16/10/95
 
/*************************************************************************
 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#include "TArc.h"
#include "TString.h"
 
#include <iostream>
 
 
/** \class TArc
\ingroup BasicGraphics
 
Create an Arc.
 
An arc is specified with the position of its centre, its radius a minimum and
maximum angle. The attributes of the outline line are given via TAttLine. The
attributes of the fill area are given via TAttFill
*/
 
////////////////////////////////////////////////////////////////////////////////
/// Arc  default constructor.
 
TArc::TArc(): TEllipse()
{
}
 
////////////////////////////////////////////////////////////////////////////////
/// Arc  normal constructor.
///
/// \param[in] x1,y1    coordinates of centre of arc
/// \param[in] r1       arc radius
/// \param[in] phimin   min angle in degrees (default is 0-->360)
/// \param[in] phimax   max angle in degrees (default is 0-->360)
///
/// When a circle sector only is drawn, the lines connecting the center
/// of the arc to the edges are drawn by default. One can specify
/// the drawing option "only" to not draw these lines.
 
TArc::TArc(Double_t x1, Double_t y1,Double_t r1,Double_t phimin,Double_t phimax)
      :TEllipse(x1,y1,r1,r1,phimin,phimax,0)
{
}
 
////////////////////////////////////////////////////////////////////////////////
/// Copy constructor.
 
TArc::TArc(const TArc &arc) : TEllipse(arc)
{
   arc.TArc::Copy(*this);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Arc default destructor.
 
TArc::~TArc()
{
}
 
////////////////////////////////////////////////////////////////////////////////
/// Copy this arc to arc.
 
void TArc::Copy(TObject &arc) const
{
   TEllipse::Copy(arc);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Draw this arc with new coordinates.
 
TArc *TArc::DrawArc(Double_t x1, Double_t y1,Double_t r1,Double_t phimin,Double_t phimax,Option_t *option)
{
   TArc *newarc = new TArc(x1, y1, r1, phimin, phimax);
   TAttLine::Copy(*newarc);
   TAttFill::Copy(*newarc);
   newarc->SetBit(kCanDelete);
   newarc->AppendPad(option);
   return newarc;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Save primitive as a C++ statement(s) on output stream out
 
void TArc::SavePrimitive(std::ostream &out, Option_t *option)
{
   SavePrimitiveConstructor(out, Class(), "arc",
                            TString::Format("%g, %g, %g, %g, %g", fX1, fY1, fR1, fPhimin, fPhimax));
 
   SaveFillAttributes(out, "arc", 0, 1001);
   SaveLineAttributes(out, "arc", 1, 1, 1);
 
   if (GetNoEdges())
      out << "   arc->SetNoEdges();\n";
 
   SavePrimitiveDraw(out, "arc", option);
}