lemon/graph_to_eps.h
author Alpar Juttner <alpar@cs.elte.hu>
Fri, 13 Feb 2009 14:56:27 +0000
changeset 486 bc0a130bbb46
parent 440 88ed40ad0d4f
parent 484 daddd623ac9a
child 492 b9b3473327e3
permissions -rw-r--r--
Fix in lp_base.cc targeting AIX/xlC compatibility
     1 /* -*- mode: C++; indent-tabs-mode: nil; -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library.
     4  *
     5  * Copyright (C) 2003-2009
     6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8  *
     9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #ifndef LEMON_GRAPH_TO_EPS_H
    20 #define LEMON_GRAPH_TO_EPS_H
    21 
    22 #include<iostream>
    23 #include<fstream>
    24 #include<sstream>
    25 #include<algorithm>
    26 #include<vector>
    27 
    28 #ifndef WIN32
    29 #include<sys/time.h>
    30 #include<ctime>
    31 #else
    32 #ifndef WIN32_LEAN_AND_MEAN
    33 #define WIN32_LEAN_AND_MEAN
    34 #endif
    35 #ifndef NOMINMAX
    36 #define NOMINMAX
    37 #endif
    38 #include<windows.h>
    39 #endif
    40 
    41 #include<lemon/math.h>
    42 #include<lemon/core.h>
    43 #include<lemon/dim2.h>
    44 #include<lemon/maps.h>
    45 #include<lemon/color.h>
    46 #include<lemon/bits/bezier.h>
    47 #include<lemon/error.h>
    48 
    49 
    50 ///\ingroup eps_io
    51 ///\file
    52 ///\brief A well configurable tool for visualizing graphs
    53 
    54 namespace lemon {
    55 
    56   namespace _graph_to_eps_bits {
    57     template<class MT>
    58     class _NegY {
    59     public:
    60       typedef typename MT::Key Key;
    61       typedef typename MT::Value Value;
    62       const MT &map;
    63       int yscale;
    64       _NegY(const MT &m,bool b) : map(m), yscale(1-b*2) {}
    65       Value operator[](Key n) { return Value(map[n].x,map[n].y*yscale);}
    66     };
    67   }
    68 
    69 ///Default traits class of GraphToEps
    70 
    71 ///Default traits class of \ref GraphToEps.
    72 ///
    73 ///\c G is the type of the underlying graph.
    74 template<class G>
    75 struct DefaultGraphToEpsTraits
    76 {
    77   typedef G Graph;
    78   typedef typename Graph::Node Node;
    79   typedef typename Graph::NodeIt NodeIt;
    80   typedef typename Graph::Arc Arc;
    81   typedef typename Graph::ArcIt ArcIt;
    82   typedef typename Graph::InArcIt InArcIt;
    83   typedef typename Graph::OutArcIt OutArcIt;
    84 
    85 
    86   const Graph &g;
    87 
    88   std::ostream& os;
    89 
    90   typedef ConstMap<typename Graph::Node,dim2::Point<double> > CoordsMapType;
    91   CoordsMapType _coords;
    92   ConstMap<typename Graph::Node,double > _nodeSizes;
    93   ConstMap<typename Graph::Node,int > _nodeShapes;
    94 
    95   ConstMap<typename Graph::Node,Color > _nodeColors;
    96   ConstMap<typename Graph::Arc,Color > _arcColors;
    97 
    98   ConstMap<typename Graph::Arc,double > _arcWidths;
    99 
   100   double _arcWidthScale;
   101 
   102   double _nodeScale;
   103   double _xBorder, _yBorder;
   104   double _scale;
   105   double _nodeBorderQuotient;
   106 
   107   bool _drawArrows;
   108   double _arrowLength, _arrowWidth;
   109 
   110   bool _showNodes, _showArcs;
   111 
   112   bool _enableParallel;
   113   double _parArcDist;
   114 
   115   bool _showNodeText;
   116   ConstMap<typename Graph::Node,bool > _nodeTexts;
   117   double _nodeTextSize;
   118 
   119   bool _showNodePsText;
   120   ConstMap<typename Graph::Node,bool > _nodePsTexts;
   121   char *_nodePsTextsPreamble;
   122 
   123   bool _undirected;
   124 
   125   bool _pleaseRemoveOsStream;
   126 
   127   bool _scaleToA4;
   128 
   129   std::string _title;
   130   std::string _copyright;
   131 
   132   enum NodeTextColorType
   133     { DIST_COL=0, DIST_BW=1, CUST_COL=2, SAME_COL=3 } _nodeTextColorType;
   134   ConstMap<typename Graph::Node,Color > _nodeTextColors;
   135 
   136   bool _autoNodeScale;
   137   bool _autoArcWidthScale;
   138 
   139   bool _absoluteNodeSizes;
   140   bool _absoluteArcWidths;
   141 
   142   bool _negY;
   143 
   144   bool _preScale;
   145   ///Constructor
   146 
   147   ///Constructor
   148   ///\param _g  Reference to the graph to be printed.
   149   ///\param _os Reference to the output stream.
   150   ///\param _os Reference to the output stream.
   151   ///By default it is <tt>std::cout</tt>.
   152   ///\param _pros If it is \c true, then the \c ostream referenced by \c _os
   153   ///will be explicitly deallocated by the destructor.
   154   DefaultGraphToEpsTraits(const G &_g,std::ostream& _os=std::cout,
   155                           bool _pros=false) :
   156     g(_g), os(_os),
   157     _coords(dim2::Point<double>(1,1)), _nodeSizes(1), _nodeShapes(0),
   158     _nodeColors(WHITE), _arcColors(BLACK),
   159     _arcWidths(1.0), _arcWidthScale(0.003),
   160     _nodeScale(.01), _xBorder(10), _yBorder(10), _scale(1.0),
   161     _nodeBorderQuotient(.1),
   162     _drawArrows(false), _arrowLength(1), _arrowWidth(0.3),
   163     _showNodes(true), _showArcs(true),
   164     _enableParallel(false), _parArcDist(1),
   165     _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
   166     _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
   167     _undirected(lemon::UndirectedTagIndicator<G>::value),
   168     _pleaseRemoveOsStream(_pros), _scaleToA4(false),
   169     _nodeTextColorType(SAME_COL), _nodeTextColors(BLACK),
   170     _autoNodeScale(false),
   171     _autoArcWidthScale(false),
   172     _absoluteNodeSizes(false),
   173     _absoluteArcWidths(false),
   174     _negY(false),
   175     _preScale(true)
   176   {}
   177 };
   178 
   179 ///Auxiliary class to implement the named parameters of \ref graphToEps()
   180 
   181 ///Auxiliary class to implement the named parameters of \ref graphToEps().
   182 ///
   183 ///For detailed examples see the \ref graph_to_eps_demo.cc demo file.
   184 template<class T> class GraphToEps : public T
   185 {
   186   // Can't believe it is required by the C++ standard
   187   using T::g;
   188   using T::os;
   189 
   190   using T::_coords;
   191   using T::_nodeSizes;
   192   using T::_nodeShapes;
   193   using T::_nodeColors;
   194   using T::_arcColors;
   195   using T::_arcWidths;
   196 
   197   using T::_arcWidthScale;
   198   using T::_nodeScale;
   199   using T::_xBorder;
   200   using T::_yBorder;
   201   using T::_scale;
   202   using T::_nodeBorderQuotient;
   203 
   204   using T::_drawArrows;
   205   using T::_arrowLength;
   206   using T::_arrowWidth;
   207 
   208   using T::_showNodes;
   209   using T::_showArcs;
   210 
   211   using T::_enableParallel;
   212   using T::_parArcDist;
   213 
   214   using T::_showNodeText;
   215   using T::_nodeTexts;
   216   using T::_nodeTextSize;
   217 
   218   using T::_showNodePsText;
   219   using T::_nodePsTexts;
   220   using T::_nodePsTextsPreamble;
   221 
   222   using T::_undirected;
   223 
   224   using T::_pleaseRemoveOsStream;
   225 
   226   using T::_scaleToA4;
   227 
   228   using T::_title;
   229   using T::_copyright;
   230 
   231   using T::NodeTextColorType;
   232   using T::CUST_COL;
   233   using T::DIST_COL;
   234   using T::DIST_BW;
   235   using T::_nodeTextColorType;
   236   using T::_nodeTextColors;
   237 
   238   using T::_autoNodeScale;
   239   using T::_autoArcWidthScale;
   240 
   241   using T::_absoluteNodeSizes;
   242   using T::_absoluteArcWidths;
   243 
   244 
   245   using T::_negY;
   246   using T::_preScale;
   247 
   248   // dradnats ++C eht yb deriuqer si ti eveileb t'naC
   249 
   250   typedef typename T::Graph Graph;
   251   typedef typename Graph::Node Node;
   252   typedef typename Graph::NodeIt NodeIt;
   253   typedef typename Graph::Arc Arc;
   254   typedef typename Graph::ArcIt ArcIt;
   255   typedef typename Graph::InArcIt InArcIt;
   256   typedef typename Graph::OutArcIt OutArcIt;
   257 
   258   static const int INTERPOL_PREC;
   259   static const double A4HEIGHT;
   260   static const double A4WIDTH;
   261   static const double A4BORDER;
   262 
   263   bool dontPrint;
   264 
   265 public:
   266   ///Node shapes
   267 
   268   ///Node shapes.
   269   ///
   270   enum NodeShapes {
   271     /// = 0
   272     ///\image html nodeshape_0.png
   273     ///\image latex nodeshape_0.eps "CIRCLE shape (0)" width=2cm
   274     CIRCLE=0,
   275     /// = 1
   276     ///\image html nodeshape_1.png
   277     ///\image latex nodeshape_1.eps "SQUARE shape (1)" width=2cm
   278     ///
   279     SQUARE=1,
   280     /// = 2
   281     ///\image html nodeshape_2.png
   282     ///\image latex nodeshape_2.eps "DIAMOND shape (2)" width=2cm
   283     ///
   284     DIAMOND=2,
   285     /// = 3
   286     ///\image html nodeshape_3.png
   287     ///\image latex nodeshape_2.eps "MALE shape (4)" width=2cm
   288     ///
   289     MALE=3,
   290     /// = 4
   291     ///\image html nodeshape_4.png
   292     ///\image latex nodeshape_2.eps "FEMALE shape (4)" width=2cm
   293     ///
   294     FEMALE=4
   295   };
   296 
   297 private:
   298   class arcLess {
   299     const Graph &g;
   300   public:
   301     arcLess(const Graph &_g) : g(_g) {}
   302     bool operator()(Arc a,Arc b) const
   303     {
   304       Node ai=std::min(g.source(a),g.target(a));
   305       Node aa=std::max(g.source(a),g.target(a));
   306       Node bi=std::min(g.source(b),g.target(b));
   307       Node ba=std::max(g.source(b),g.target(b));
   308       return ai<bi ||
   309         (ai==bi && (aa < ba ||
   310                     (aa==ba && ai==g.source(a) && bi==g.target(b))));
   311     }
   312   };
   313   bool isParallel(Arc e,Arc f) const
   314   {
   315     return (g.source(e)==g.source(f)&&
   316             g.target(e)==g.target(f)) ||
   317       (g.source(e)==g.target(f)&&
   318        g.target(e)==g.source(f));
   319   }
   320   template<class TT>
   321   static std::string psOut(const dim2::Point<TT> &p)
   322     {
   323       std::ostringstream os;
   324       os << p.x << ' ' << p.y;
   325       return os.str();
   326     }
   327   static std::string psOut(const Color &c)
   328     {
   329       std::ostringstream os;
   330       os << c.red() << ' ' << c.green() << ' ' << c.blue();
   331       return os.str();
   332     }
   333 
   334 public:
   335   GraphToEps(const T &t) : T(t), dontPrint(false) {};
   336 
   337   template<class X> struct CoordsTraits : public T {
   338   typedef X CoordsMapType;
   339     const X &_coords;
   340     CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}
   341   };
   342   ///Sets the map of the node coordinates
   343 
   344   ///Sets the map of the node coordinates.
   345   ///\param x must be a node map with \ref dim2::Point "dim2::Point<double>" or
   346   ///\ref dim2::Point "dim2::Point<int>" values.
   347   template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
   348     dontPrint=true;
   349     return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));
   350   }
   351   template<class X> struct NodeSizesTraits : public T {
   352     const X &_nodeSizes;
   353     NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}
   354   };
   355   ///Sets the map of the node sizes
   356 
   357   ///Sets the map of the node sizes.
   358   ///\param x must be a node map with \c double (or convertible) values.
   359   template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)
   360   {
   361     dontPrint=true;
   362     return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));
   363   }
   364   template<class X> struct NodeShapesTraits : public T {
   365     const X &_nodeShapes;
   366     NodeShapesTraits(const T &t,const X &x) : T(t), _nodeShapes(x) {}
   367   };
   368   ///Sets the map of the node shapes
   369 
   370   ///Sets the map of the node shapes.
   371   ///The available shape values
   372   ///can be found in \ref NodeShapes "enum NodeShapes".
   373   ///\param x must be a node map with \c int (or convertible) values.
   374   ///\sa NodeShapes
   375   template<class X> GraphToEps<NodeShapesTraits<X> > nodeShapes(const X &x)
   376   {
   377     dontPrint=true;
   378     return GraphToEps<NodeShapesTraits<X> >(NodeShapesTraits<X>(*this,x));
   379   }
   380   template<class X> struct NodeTextsTraits : public T {
   381     const X &_nodeTexts;
   382     NodeTextsTraits(const T &t,const X &x) : T(t), _nodeTexts(x) {}
   383   };
   384   ///Sets the text printed on the nodes
   385 
   386   ///Sets the text printed on the nodes.
   387   ///\param x must be a node map with type that can be pushed to a standard
   388   ///\c ostream.
   389   template<class X> GraphToEps<NodeTextsTraits<X> > nodeTexts(const X &x)
   390   {
   391     dontPrint=true;
   392     _showNodeText=true;
   393     return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
   394   }
   395   template<class X> struct NodePsTextsTraits : public T {
   396     const X &_nodePsTexts;
   397     NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
   398   };
   399   ///Inserts a PostScript block to the nodes
   400 
   401   ///With this command it is possible to insert a verbatim PostScript
   402   ///block to the nodes.
   403   ///The PS current point will be moved to the center of the node before
   404   ///the PostScript block inserted.
   405   ///
   406   ///Before and after the block a newline character is inserted so you
   407   ///don't have to bother with the separators.
   408   ///
   409   ///\param x must be a node map with type that can be pushed to a standard
   410   ///\c ostream.
   411   ///
   412   ///\sa nodePsTextsPreamble()
   413   template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
   414   {
   415     dontPrint=true;
   416     _showNodePsText=true;
   417     return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
   418   }
   419   template<class X> struct ArcWidthsTraits : public T {
   420     const X &_arcWidths;
   421     ArcWidthsTraits(const T &t,const X &x) : T(t), _arcWidths(x) {}
   422   };
   423   ///Sets the map of the arc widths
   424 
   425   ///Sets the map of the arc widths.
   426   ///\param x must be an arc map with \c double (or convertible) values.
   427   template<class X> GraphToEps<ArcWidthsTraits<X> > arcWidths(const X &x)
   428   {
   429     dontPrint=true;
   430     return GraphToEps<ArcWidthsTraits<X> >(ArcWidthsTraits<X>(*this,x));
   431   }
   432 
   433   template<class X> struct NodeColorsTraits : public T {
   434     const X &_nodeColors;
   435     NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}
   436   };
   437   ///Sets the map of the node colors
   438 
   439   ///Sets the map of the node colors.
   440   ///\param x must be a node map with \ref Color values.
   441   ///
   442   ///\sa Palette
   443   template<class X> GraphToEps<NodeColorsTraits<X> >
   444   nodeColors(const X &x)
   445   {
   446     dontPrint=true;
   447     return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));
   448   }
   449   template<class X> struct NodeTextColorsTraits : public T {
   450     const X &_nodeTextColors;
   451     NodeTextColorsTraits(const T &t,const X &x) : T(t), _nodeTextColors(x) {}
   452   };
   453   ///Sets the map of the node text colors
   454 
   455   ///Sets the map of the node text colors.
   456   ///\param x must be a node map with \ref Color values.
   457   ///
   458   ///\sa Palette
   459   template<class X> GraphToEps<NodeTextColorsTraits<X> >
   460   nodeTextColors(const X &x)
   461   {
   462     dontPrint=true;
   463     _nodeTextColorType=CUST_COL;
   464     return GraphToEps<NodeTextColorsTraits<X> >
   465       (NodeTextColorsTraits<X>(*this,x));
   466   }
   467   template<class X> struct ArcColorsTraits : public T {
   468     const X &_arcColors;
   469     ArcColorsTraits(const T &t,const X &x) : T(t), _arcColors(x) {}
   470   };
   471   ///Sets the map of the arc colors
   472 
   473   ///Sets the map of the arc colors.
   474   ///\param x must be an arc map with \ref Color values.
   475   ///
   476   ///\sa Palette
   477   template<class X> GraphToEps<ArcColorsTraits<X> >
   478   arcColors(const X &x)
   479   {
   480     dontPrint=true;
   481     return GraphToEps<ArcColorsTraits<X> >(ArcColorsTraits<X>(*this,x));
   482   }
   483   ///Sets a global scale factor for node sizes
   484 
   485   ///Sets a global scale factor for node sizes.
   486   ///
   487   /// If nodeSizes() is not given, this function simply sets the node
   488   /// sizes to \c d.  If nodeSizes() is given, but
   489   /// autoNodeScale() is not, then the node size given by
   490   /// nodeSizes() will be multiplied by the value \c d.
   491   /// If both nodeSizes() and autoNodeScale() are used, then the
   492   /// node sizes will be scaled in such a way that the greatest size will be
   493   /// equal to \c d.
   494   /// \sa nodeSizes()
   495   /// \sa autoNodeScale()
   496   GraphToEps<T> &nodeScale(double d=.01) {_nodeScale=d;return *this;}
   497   ///Turns on/off the automatic node size scaling.
   498 
   499   ///Turns on/off the automatic node size scaling.
   500   ///
   501   ///\sa nodeScale()
   502   ///
   503   GraphToEps<T> &autoNodeScale(bool b=true) {
   504     _autoNodeScale=b;return *this;
   505   }
   506 
   507   ///Turns on/off the absolutematic node size scaling.
   508 
   509   ///Turns on/off the absolutematic node size scaling.
   510   ///
   511   ///\sa nodeScale()
   512   ///
   513   GraphToEps<T> &absoluteNodeSizes(bool b=true) {
   514     _absoluteNodeSizes=b;return *this;
   515   }
   516 
   517   ///Negates the Y coordinates.
   518   GraphToEps<T> &negateY(bool b=true) {
   519     _negY=b;return *this;
   520   }
   521 
   522   ///Turn on/off pre-scaling
   523 
   524   ///By default graphToEps() rescales the whole image in order to avoid
   525   ///very big or very small bounding boxes.
   526   ///
   527   ///This (p)rescaling can be turned off with this function.
   528   ///
   529   GraphToEps<T> &preScale(bool b=true) {
   530     _preScale=b;return *this;
   531   }
   532 
   533   ///Sets a global scale factor for arc widths
   534 
   535   /// Sets a global scale factor for arc widths.
   536   ///
   537   /// If arcWidths() is not given, this function simply sets the arc
   538   /// widths to \c d.  If arcWidths() is given, but
   539   /// autoArcWidthScale() is not, then the arc withs given by
   540   /// arcWidths() will be multiplied by the value \c d.
   541   /// If both arcWidths() and autoArcWidthScale() are used, then the
   542   /// arc withs will be scaled in such a way that the greatest width will be
   543   /// equal to \c d.
   544   GraphToEps<T> &arcWidthScale(double d=.003) {_arcWidthScale=d;return *this;}
   545   ///Turns on/off the automatic arc width scaling.
   546 
   547   ///Turns on/off the automatic arc width scaling.
   548   ///
   549   ///\sa arcWidthScale()
   550   ///
   551   GraphToEps<T> &autoArcWidthScale(bool b=true) {
   552     _autoArcWidthScale=b;return *this;
   553   }
   554   ///Turns on/off the absolutematic arc width scaling.
   555 
   556   ///Turns on/off the absolutematic arc width scaling.
   557   ///
   558   ///\sa arcWidthScale()
   559   ///
   560   GraphToEps<T> &absoluteArcWidths(bool b=true) {
   561     _absoluteArcWidths=b;return *this;
   562   }
   563   ///Sets a global scale factor for the whole picture
   564   GraphToEps<T> &scale(double d) {_scale=d;return *this;}
   565   ///Sets the width of the border around the picture
   566   GraphToEps<T> &border(double b=10) {_xBorder=_yBorder=b;return *this;}
   567   ///Sets the width of the border around the picture
   568   GraphToEps<T> &border(double x, double y) {
   569     _xBorder=x;_yBorder=y;return *this;
   570   }
   571   ///Sets whether to draw arrows
   572   GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}
   573   ///Sets the length of the arrowheads
   574   GraphToEps<T> &arrowLength(double d=1.0) {_arrowLength*=d;return *this;}
   575   ///Sets the width of the arrowheads
   576   GraphToEps<T> &arrowWidth(double d=.3) {_arrowWidth*=d;return *this;}
   577 
   578   ///Scales the drawing to fit to A4 page
   579   GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
   580 
   581   ///Enables parallel arcs
   582   GraphToEps<T> &enableParallel(bool b=true) {_enableParallel=b;return *this;}
   583 
   584   ///Sets the distance between parallel arcs
   585   GraphToEps<T> &parArcDist(double d) {_parArcDist*=d;return *this;}
   586 
   587   ///Hides the arcs
   588   GraphToEps<T> &hideArcs(bool b=true) {_showArcs=!b;return *this;}
   589   ///Hides the nodes
   590   GraphToEps<T> &hideNodes(bool b=true) {_showNodes=!b;return *this;}
   591 
   592   ///Sets the size of the node texts
   593   GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
   594 
   595   ///Sets the color of the node texts to be different from the node color
   596 
   597   ///Sets the color of the node texts to be as different from the node color
   598   ///as it is possible.
   599   GraphToEps<T> &distantColorNodeTexts()
   600   {_nodeTextColorType=DIST_COL;return *this;}
   601   ///Sets the color of the node texts to be black or white and always visible.
   602 
   603   ///Sets the color of the node texts to be black or white according to
   604   ///which is more different from the node color.
   605   GraphToEps<T> &distantBWNodeTexts()
   606   {_nodeTextColorType=DIST_BW;return *this;}
   607 
   608   ///Gives a preamble block for node Postscript block.
   609 
   610   ///Gives a preamble block for node Postscript block.
   611   ///
   612   ///\sa nodePsTexts()
   613   GraphToEps<T> & nodePsTextsPreamble(const char *str) {
   614     _nodePsTextsPreamble=str ;return *this;
   615   }
   616   ///Sets whether the graph is undirected
   617 
   618   ///Sets whether the graph is undirected.
   619   ///
   620   ///This setting is the default for undirected graphs.
   621   ///
   622   ///\sa directed()
   623    GraphToEps<T> &undirected(bool b=true) {_undirected=b;return *this;}
   624 
   625   ///Sets whether the graph is directed
   626 
   627   ///Sets whether the graph is directed.
   628   ///Use it to show the edges as a pair of directed ones.
   629   ///
   630   ///This setting is the default for digraphs.
   631   ///
   632   ///\sa undirected()
   633   GraphToEps<T> &directed(bool b=true) {_undirected=!b;return *this;}
   634 
   635   ///Sets the title.
   636 
   637   ///Sets the title of the generated image,
   638   ///namely it inserts a <tt>%%Title:</tt> DSC field to the header of
   639   ///the EPS file.
   640   GraphToEps<T> &title(const std::string &t) {_title=t;return *this;}
   641   ///Sets the copyright statement.
   642 
   643   ///Sets the copyright statement of the generated image,
   644   ///namely it inserts a <tt>%%Copyright:</tt> DSC field to the header of
   645   ///the EPS file.
   646   GraphToEps<T> &copyright(const std::string &t) {_copyright=t;return *this;}
   647 
   648 protected:
   649   bool isInsideNode(dim2::Point<double> p, double r,int t)
   650   {
   651     switch(t) {
   652     case CIRCLE:
   653     case MALE:
   654     case FEMALE:
   655       return p.normSquare()<=r*r;
   656     case SQUARE:
   657       return p.x<=r&&p.x>=-r&&p.y<=r&&p.y>=-r;
   658     case DIAMOND:
   659       return p.x+p.y<=r && p.x-p.y<=r && -p.x+p.y<=r && -p.x-p.y<=r;
   660     }
   661     return false;
   662   }
   663 
   664 public:
   665   ~GraphToEps() { }
   666 
   667   ///Draws the graph.
   668 
   669   ///Like other functions using
   670   ///\ref named-templ-func-param "named template parameters",
   671   ///this function calls the algorithm itself, i.e. in this case
   672   ///it draws the graph.
   673   void run() {
   674     const double EPSILON=1e-9;
   675     if(dontPrint) return;
   676 
   677     _graph_to_eps_bits::_NegY<typename T::CoordsMapType>
   678       mycoords(_coords,_negY);
   679 
   680     os << "%!PS-Adobe-2.0 EPSF-2.0\n";
   681     if(_title.size()>0) os << "%%Title: " << _title << '\n';
   682      if(_copyright.size()>0) os << "%%Copyright: " << _copyright << '\n';
   683     os << "%%Creator: LEMON, graphToEps()\n";
   684 
   685     {
   686 #ifndef WIN32
   687       timeval tv;
   688       gettimeofday(&tv, 0);
   689 
   690       char cbuf[26];
   691       ctime_r(&tv.tv_sec,cbuf);
   692       os << "%%CreationDate: " << cbuf;
   693 #else
   694       SYSTEMTIME time;
   695       GetSystemTime(&time);
   696 #if defined(_MSC_VER) && (_MSC_VER < 1500)
   697       LPWSTR buf1, buf2, buf3;
   698       if (GetDateFormat(LOCALE_USER_DEFAULT, 0, &time,
   699                         L"ddd MMM dd", buf1, 11) &&
   700           GetTimeFormat(LOCALE_USER_DEFAULT, 0, &time,
   701                         L"HH':'mm':'ss", buf2, 9) &&
   702           GetDateFormat(LOCALE_USER_DEFAULT, 0, &time,
   703                         L"yyyy", buf3, 5)) {
   704         os << "%%CreationDate: " << buf1 << ' '
   705            << buf2 << ' ' << buf3 << std::endl;
   706       }
   707 #else
   708         char buf1[11], buf2[9], buf3[5];
   709         if (GetDateFormat(LOCALE_USER_DEFAULT, 0, &time,
   710                           "ddd MMM dd", buf1, 11) &&
   711             GetTimeFormat(LOCALE_USER_DEFAULT, 0, &time,
   712                           "HH':'mm':'ss", buf2, 9) &&
   713             GetDateFormat(LOCALE_USER_DEFAULT, 0, &time,
   714                           "yyyy", buf3, 5)) {
   715           os << "%%CreationDate: " << buf1 << ' '
   716              << buf2 << ' ' << buf3 << std::endl;
   717         }
   718 #endif
   719 #endif
   720     }
   721 
   722     if (_autoArcWidthScale) {
   723       double max_w=0;
   724       for(ArcIt e(g);e!=INVALID;++e)
   725         max_w=std::max(double(_arcWidths[e]),max_w);
   726       if(max_w>EPSILON) {
   727         _arcWidthScale/=max_w;
   728       }
   729     }
   730 
   731     if (_autoNodeScale) {
   732       double max_s=0;
   733       for(NodeIt n(g);n!=INVALID;++n)
   734         max_s=std::max(double(_nodeSizes[n]),max_s);
   735       if(max_s>EPSILON) {
   736         _nodeScale/=max_s;
   737       }
   738     }
   739 
   740     double diag_len = 1;
   741     if(!(_absoluteNodeSizes&&_absoluteArcWidths)) {
   742       dim2::Box<double> bb;
   743       for(NodeIt n(g);n!=INVALID;++n) bb.add(mycoords[n]);
   744       if (bb.empty()) {
   745         bb = dim2::Box<double>(dim2::Point<double>(0,0));
   746       }
   747       diag_len = std::sqrt((bb.bottomLeft()-bb.topRight()).normSquare());
   748       if(diag_len<EPSILON) diag_len = 1;
   749       if(!_absoluteNodeSizes) _nodeScale*=diag_len;
   750       if(!_absoluteArcWidths) _arcWidthScale*=diag_len;
   751     }
   752 
   753     dim2::Box<double> bb;
   754     for(NodeIt n(g);n!=INVALID;++n) {
   755       double ns=_nodeSizes[n]*_nodeScale;
   756       dim2::Point<double> p(ns,ns);
   757       switch(_nodeShapes[n]) {
   758       case CIRCLE:
   759       case SQUARE:
   760       case DIAMOND:
   761         bb.add(p+mycoords[n]);
   762         bb.add(-p+mycoords[n]);
   763         break;
   764       case MALE:
   765         bb.add(-p+mycoords[n]);
   766         bb.add(dim2::Point<double>(1.5*ns,1.5*std::sqrt(3.0)*ns)+mycoords[n]);
   767         break;
   768       case FEMALE:
   769         bb.add(p+mycoords[n]);
   770         bb.add(dim2::Point<double>(-ns,-3.01*ns)+mycoords[n]);
   771         break;
   772       }
   773     }
   774     if (bb.empty()) {
   775       bb = dim2::Box<double>(dim2::Point<double>(0,0));
   776     }
   777 
   778     if(_scaleToA4)
   779       os <<"%%BoundingBox: 0 0 596 842\n%%DocumentPaperSizes: a4\n";
   780     else {
   781       if(_preScale) {
   782         //Rescale so that BoundingBox won't be neither to big nor too small.
   783         while(bb.height()*_scale>1000||bb.width()*_scale>1000) _scale/=10;
   784         while(bb.height()*_scale<100||bb.width()*_scale<100) _scale*=10;
   785       }
   786 
   787       os << "%%BoundingBox: "
   788          << int(floor(bb.left()   * _scale - _xBorder)) << ' '
   789          << int(floor(bb.bottom() * _scale - _yBorder)) << ' '
   790          << int(ceil(bb.right()  * _scale + _xBorder)) << ' '
   791          << int(ceil(bb.top()    * _scale + _yBorder)) << '\n';
   792     }
   793 
   794     os << "%%EndComments\n";
   795 
   796     //x1 y1 x2 y2 x3 y3 cr cg cb w
   797     os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
   798        << "      4 2 roll 1 index 1 index curveto stroke } bind def\n";
   799     os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke }"
   800        << " bind def\n";
   801     //x y r
   802     os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath }"
   803        << " bind def\n";
   804     //x y r
   805     os << "/sq { newpath 2 index 1 index add 2 index 2 index add moveto\n"
   806        << "      2 index 1 index sub 2 index 2 index add lineto\n"
   807        << "      2 index 1 index sub 2 index 2 index sub lineto\n"
   808        << "      2 index 1 index add 2 index 2 index sub lineto\n"
   809        << "      closepath pop pop pop} bind def\n";
   810     //x y r
   811     os << "/di { newpath 2 index 1 index add 2 index moveto\n"
   812        << "      2 index             2 index 2 index add lineto\n"
   813        << "      2 index 1 index sub 2 index             lineto\n"
   814        << "      2 index             2 index 2 index sub lineto\n"
   815        << "      closepath pop pop pop} bind def\n";
   816     // x y r cr cg cb
   817     os << "/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill\n"
   818        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   819        << "   } bind def\n";
   820     os << "/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill\n"
   821        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div sq fill\n"
   822        << "   } bind def\n";
   823     os << "/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill\n"
   824        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div di fill\n"
   825        << "   } bind def\n";
   826     os << "/nfemale { 0 0 0 setrgbcolor 3 index "
   827        << _nodeBorderQuotient/(1+_nodeBorderQuotient)
   828        << " 1.5 mul mul setlinewidth\n"
   829        << "  newpath 5 index 5 index moveto "
   830        << "5 index 5 index 5 index 3.01 mul sub\n"
   831        << "  lineto 5 index 4 index .7 mul sub 5 index 5 index 2.2 mul sub"
   832        << " moveto\n"
   833        << "  5 index 4 index .7 mul add 5 index 5 index 2.2 mul sub lineto "
   834        << "stroke\n"
   835        << "  5 index 5 index 5 index c fill\n"
   836        << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   837        << "  } bind def\n";
   838     os << "/nmale {\n"
   839        << "  0 0 0 setrgbcolor 3 index "
   840        << _nodeBorderQuotient/(1+_nodeBorderQuotient)
   841        <<" 1.5 mul mul setlinewidth\n"
   842        << "  newpath 5 index 5 index moveto\n"
   843        << "  5 index 4 index 1 mul 1.5 mul add\n"
   844        << "  5 index 5 index 3 sqrt 1.5 mul mul add\n"
   845        << "  1 index 1 index lineto\n"
   846        << "  1 index 1 index 7 index sub moveto\n"
   847        << "  1 index 1 index lineto\n"
   848        << "  exch 5 index 3 sqrt .5 mul mul sub exch 5 index .5 mul sub"
   849        << " lineto\n"
   850        << "  stroke\n"
   851        << "  5 index 5 index 5 index c fill\n"
   852        << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   853        << "  } bind def\n";
   854 
   855 
   856     os << "/arrl " << _arrowLength << " def\n";
   857     os << "/arrw " << _arrowWidth << " def\n";
   858     // l dx_norm dy_norm
   859     os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";
   860     //len w dx_norm dy_norm x1 y1 cr cg cb
   861     os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx "
   862        << "exch def\n"
   863        << "       /w exch def /len exch def\n"
   864       //<< "0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"
   865        << "       newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"
   866        << "       len w sub arrl sub dx dy lrl\n"
   867        << "       arrw dy dx neg lrl\n"
   868        << "       dx arrl w add mul dy w 2 div arrw add mul sub\n"
   869        << "       dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"
   870        << "       dx arrl w add mul neg dy w 2 div arrw add mul sub\n"
   871        << "       dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"
   872        << "       arrw dy dx neg lrl\n"
   873        << "       len w sub arrl sub neg dx dy lrl\n"
   874        << "       closepath fill } bind def\n";
   875     os << "/cshow { 2 index 2 index moveto dup stringwidth pop\n"
   876        << "         neg 2 div fosi .35 mul neg rmoveto show pop pop} def\n";
   877 
   878     os << "\ngsave\n";
   879     if(_scaleToA4)
   880       if(bb.height()>bb.width()) {
   881         double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.height(),
   882                   (A4WIDTH-2*A4BORDER)/bb.width());
   883         os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
   884            << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER
   885            << " translate\n"
   886            << sc << " dup scale\n"
   887            << -bb.left() << ' ' << -bb.bottom() << " translate\n";
   888       }
   889       else {
   890         double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.width(),
   891                   (A4WIDTH-2*A4BORDER)/bb.height());
   892         os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
   893            << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER
   894            << " translate\n"
   895            << sc << " dup scale\n90 rotate\n"
   896            << -bb.left() << ' ' << -bb.top() << " translate\n";
   897         }
   898     else if(_scale!=1.0) os << _scale << " dup scale\n";
   899 
   900     if(_showArcs) {
   901       os << "%Arcs:\ngsave\n";
   902       if(_enableParallel) {
   903         std::vector<Arc> el;
   904         for(ArcIt e(g);e!=INVALID;++e)
   905           if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
   906              &&g.source(e)!=g.target(e))
   907             el.push_back(e);
   908         std::sort(el.begin(),el.end(),arcLess(g));
   909 
   910         typename std::vector<Arc>::iterator j;
   911         for(typename std::vector<Arc>::iterator i=el.begin();i!=el.end();i=j) {
   912           for(j=i+1;j!=el.end()&&isParallel(*i,*j);++j) ;
   913 
   914           double sw=0;
   915           for(typename std::vector<Arc>::iterator e=i;e!=j;++e)
   916             sw+=_arcWidths[*e]*_arcWidthScale+_parArcDist;
   917           sw-=_parArcDist;
   918           sw/=-2.0;
   919           dim2::Point<double>
   920             dvec(mycoords[g.target(*i)]-mycoords[g.source(*i)]);
   921           double l=std::sqrt(dvec.normSquare());
   922           dim2::Point<double> d(dvec/std::max(l,EPSILON));
   923           dim2::Point<double> m;
   924 //           m=dim2::Point<double>(mycoords[g.target(*i)]+
   925 //                                 mycoords[g.source(*i)])/2.0;
   926 
   927 //            m=dim2::Point<double>(mycoords[g.source(*i)])+
   928 //             dvec*(double(_nodeSizes[g.source(*i)])/
   929 //                (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
   930 
   931           m=dim2::Point<double>(mycoords[g.source(*i)])+
   932             d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
   933 
   934           for(typename std::vector<Arc>::iterator e=i;e!=j;++e) {
   935             sw+=_arcWidths[*e]*_arcWidthScale/2.0;
   936             dim2::Point<double> mm=m+rot90(d)*sw/.75;
   937             if(_drawArrows) {
   938               int node_shape;
   939               dim2::Point<double> s=mycoords[g.source(*e)];
   940               dim2::Point<double> t=mycoords[g.target(*e)];
   941               double rn=_nodeSizes[g.target(*e)]*_nodeScale;
   942               node_shape=_nodeShapes[g.target(*e)];
   943               dim2::Bezier3 bez(s,mm,mm,t);
   944               double t1=0,t2=1;
   945               for(int ii=0;ii<INTERPOL_PREC;++ii)
   946                 if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t2=(t1+t2)/2;
   947                 else t1=(t1+t2)/2;
   948               dim2::Point<double> apoint=bez((t1+t2)/2);
   949               rn = _arrowLength+_arcWidths[*e]*_arcWidthScale;
   950               rn*=rn;
   951               t2=(t1+t2)/2;t1=0;
   952               for(int ii=0;ii<INTERPOL_PREC;++ii)
   953                 if((bez((t1+t2)/2)-apoint).normSquare()>rn) t1=(t1+t2)/2;
   954                 else t2=(t1+t2)/2;
   955               dim2::Point<double> linend=bez((t1+t2)/2);
   956               bez=bez.before((t1+t2)/2);
   957 //               rn=_nodeSizes[g.source(*e)]*_nodeScale;
   958 //               node_shape=_nodeShapes[g.source(*e)];
   959 //               t1=0;t2=1;
   960 //               for(int i=0;i<INTERPOL_PREC;++i)
   961 //                 if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape))
   962 //                   t1=(t1+t2)/2;
   963 //                 else t2=(t1+t2)/2;
   964 //               bez=bez.after((t1+t2)/2);
   965               os << _arcWidths[*e]*_arcWidthScale << " setlinewidth "
   966                  << _arcColors[*e].red() << ' '
   967                  << _arcColors[*e].green() << ' '
   968                  << _arcColors[*e].blue() << " setrgbcolor newpath\n"
   969                  << bez.p1.x << ' ' <<  bez.p1.y << " moveto\n"
   970                  << bez.p2.x << ' ' << bez.p2.y << ' '
   971                  << bez.p3.x << ' ' << bez.p3.y << ' '
   972                  << bez.p4.x << ' ' << bez.p4.y << " curveto stroke\n";
   973               dim2::Point<double> dd(rot90(linend-apoint));
   974               dd*=(.5*_arcWidths[*e]*_arcWidthScale+_arrowWidth)/
   975                 std::sqrt(dd.normSquare());
   976               os << "newpath " << psOut(apoint) << " moveto "
   977                  << psOut(linend+dd) << " lineto "
   978                  << psOut(linend-dd) << " lineto closepath fill\n";
   979             }
   980             else {
   981               os << mycoords[g.source(*e)].x << ' '
   982                  << mycoords[g.source(*e)].y << ' '
   983                  << mm.x << ' ' << mm.y << ' '
   984                  << mycoords[g.target(*e)].x << ' '
   985                  << mycoords[g.target(*e)].y << ' '
   986                  << _arcColors[*e].red() << ' '
   987                  << _arcColors[*e].green() << ' '
   988                  << _arcColors[*e].blue() << ' '
   989                  << _arcWidths[*e]*_arcWidthScale << " lb\n";
   990             }
   991             sw+=_arcWidths[*e]*_arcWidthScale/2.0+_parArcDist;
   992           }
   993         }
   994       }
   995       else for(ArcIt e(g);e!=INVALID;++e)
   996         if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
   997            &&g.source(e)!=g.target(e)) {
   998           if(_drawArrows) {
   999             dim2::Point<double> d(mycoords[g.target(e)]-mycoords[g.source(e)]);
  1000             double rn=_nodeSizes[g.target(e)]*_nodeScale;
  1001             int node_shape=_nodeShapes[g.target(e)];
  1002             double t1=0,t2=1;
  1003             for(int i=0;i<INTERPOL_PREC;++i)
  1004               if(isInsideNode((-(t1+t2)/2)*d,rn,node_shape)) t1=(t1+t2)/2;
  1005               else t2=(t1+t2)/2;
  1006             double l=std::sqrt(d.normSquare());
  1007             d/=l;
  1008 
  1009             os << l*(1-(t1+t2)/2) << ' '
  1010                << _arcWidths[e]*_arcWidthScale << ' '
  1011                << d.x << ' ' << d.y << ' '
  1012                << mycoords[g.source(e)].x << ' '
  1013                << mycoords[g.source(e)].y << ' '
  1014                << _arcColors[e].red() << ' '
  1015                << _arcColors[e].green() << ' '
  1016                << _arcColors[e].blue() << " arr\n";
  1017           }
  1018           else os << mycoords[g.source(e)].x << ' '
  1019                   << mycoords[g.source(e)].y << ' '
  1020                   << mycoords[g.target(e)].x << ' '
  1021                   << mycoords[g.target(e)].y << ' '
  1022                   << _arcColors[e].red() << ' '
  1023                   << _arcColors[e].green() << ' '
  1024                   << _arcColors[e].blue() << ' '
  1025                   << _arcWidths[e]*_arcWidthScale << " l\n";
  1026         }
  1027       os << "grestore\n";
  1028     }
  1029     if(_showNodes) {
  1030       os << "%Nodes:\ngsave\n";
  1031       for(NodeIt n(g);n!=INVALID;++n) {
  1032         os << mycoords[n].x << ' ' << mycoords[n].y << ' '
  1033            << _nodeSizes[n]*_nodeScale << ' '
  1034            << _nodeColors[n].red() << ' '
  1035            << _nodeColors[n].green() << ' '
  1036            << _nodeColors[n].blue() << ' ';
  1037         switch(_nodeShapes[n]) {
  1038         case CIRCLE:
  1039           os<< "nc";break;
  1040         case SQUARE:
  1041           os<< "nsq";break;
  1042         case DIAMOND:
  1043           os<< "ndi";break;
  1044         case MALE:
  1045           os<< "nmale";break;
  1046         case FEMALE:
  1047           os<< "nfemale";break;
  1048         }
  1049         os<<'\n';
  1050       }
  1051       os << "grestore\n";
  1052     }
  1053     if(_showNodeText) {
  1054       os << "%Node texts:\ngsave\n";
  1055       os << "/fosi " << _nodeTextSize << " def\n";
  1056       os << "(Helvetica) findfont fosi scalefont setfont\n";
  1057       for(NodeIt n(g);n!=INVALID;++n) {
  1058         switch(_nodeTextColorType) {
  1059         case DIST_COL:
  1060           os << psOut(distantColor(_nodeColors[n])) << " setrgbcolor\n";
  1061           break;
  1062         case DIST_BW:
  1063           os << psOut(distantBW(_nodeColors[n])) << " setrgbcolor\n";
  1064           break;
  1065         case CUST_COL:
  1066           os << psOut(distantColor(_nodeTextColors[n])) << " setrgbcolor\n";
  1067           break;
  1068         default:
  1069           os << "0 0 0 setrgbcolor\n";
  1070         }
  1071         os << mycoords[n].x << ' ' << mycoords[n].y
  1072            << " (" << _nodeTexts[n] << ") cshow\n";
  1073       }
  1074       os << "grestore\n";
  1075     }
  1076     if(_showNodePsText) {
  1077       os << "%Node PS blocks:\ngsave\n";
  1078       for(NodeIt n(g);n!=INVALID;++n)
  1079         os << mycoords[n].x << ' ' << mycoords[n].y
  1080            << " moveto\n" << _nodePsTexts[n] << "\n";
  1081       os << "grestore\n";
  1082     }
  1083 
  1084     os << "grestore\nshowpage\n";
  1085 
  1086     //CleanUp:
  1087     if(_pleaseRemoveOsStream) {delete &os;}
  1088   }
  1089 
  1090   ///\name Aliases
  1091   ///These are just some aliases to other parameter setting functions.
  1092 
  1093   ///@{
  1094 
  1095   ///An alias for arcWidths()
  1096   template<class X> GraphToEps<ArcWidthsTraits<X> > edgeWidths(const X &x)
  1097   {
  1098     return arcWidths(x);
  1099   }
  1100 
  1101   ///An alias for arcColors()
  1102   template<class X> GraphToEps<ArcColorsTraits<X> >
  1103   edgeColors(const X &x)
  1104   {
  1105     return arcColors(x);
  1106   }
  1107 
  1108   ///An alias for arcWidthScale()
  1109   GraphToEps<T> &edgeWidthScale(double d) {return arcWidthScale(d);}
  1110 
  1111   ///An alias for autoArcWidthScale()
  1112   GraphToEps<T> &autoEdgeWidthScale(bool b=true)
  1113   {
  1114     return autoArcWidthScale(b);
  1115   }
  1116 
  1117   ///An alias for absoluteArcWidths()
  1118   GraphToEps<T> &absoluteEdgeWidths(bool b=true)
  1119   {
  1120     return absoluteArcWidths(b);
  1121   }
  1122 
  1123   ///An alias for parArcDist()
  1124   GraphToEps<T> &parEdgeDist(double d) {return parArcDist(d);}
  1125 
  1126   ///An alias for hideArcs()
  1127   GraphToEps<T> &hideEdges(bool b=true) {return hideArcs(b);}
  1128 
  1129   ///@}
  1130 };
  1131 
  1132 template<class T>
  1133 const int GraphToEps<T>::INTERPOL_PREC = 20;
  1134 template<class T>
  1135 const double GraphToEps<T>::A4HEIGHT = 841.8897637795276;
  1136 template<class T>
  1137 const double GraphToEps<T>::A4WIDTH  = 595.275590551181;
  1138 template<class T>
  1139 const double GraphToEps<T>::A4BORDER = 15;
  1140 
  1141 
  1142 ///Generates an EPS file from a graph
  1143 
  1144 ///\ingroup eps_io
  1145 ///Generates an EPS file from a graph.
  1146 ///\param g Reference to the graph to be printed.
  1147 ///\param os Reference to the output stream.
  1148 ///By default it is <tt>std::cout</tt>.
  1149 ///
  1150 ///This function also has a lot of
  1151 ///\ref named-templ-func-param "named parameters",
  1152 ///they are declared as the members of class \ref GraphToEps. The following
  1153 ///example shows how to use these parameters.
  1154 ///\code
  1155 /// graphToEps(g,os).scale(10).coords(coords)
  1156 ///              .nodeScale(2).nodeSizes(sizes)
  1157 ///              .arcWidthScale(.4).run();
  1158 ///\endcode
  1159 ///
  1160 ///For more detailed examples see the \ref graph_to_eps_demo.cc demo file.
  1161 ///
  1162 ///\warning Don't forget to put the \ref GraphToEps::run() "run()"
  1163 ///to the end of the parameter list.
  1164 ///\sa GraphToEps
  1165 ///\sa graphToEps(G &g, const char *file_name)
  1166 template<class G>
  1167 GraphToEps<DefaultGraphToEpsTraits<G> >
  1168 graphToEps(G &g, std::ostream& os=std::cout)
  1169 {
  1170   return
  1171     GraphToEps<DefaultGraphToEpsTraits<G> >(DefaultGraphToEpsTraits<G>(g,os));
  1172 }
  1173 
  1174 ///Generates an EPS file from a graph
  1175 
  1176 ///\ingroup eps_io
  1177 ///This function does the same as
  1178 ///\ref graphToEps(G &g,std::ostream& os)
  1179 ///but it writes its output into the file \c file_name
  1180 ///instead of a stream.
  1181 ///\sa graphToEps(G &g, std::ostream& os)
  1182 template<class G>
  1183 GraphToEps<DefaultGraphToEpsTraits<G> >
  1184 graphToEps(G &g,const char *file_name)
  1185 {
  1186   std::ostream* os = new std::ofstream(file_name);
  1187   if (!(*os)) {
  1188     delete os;
  1189     throw IoError("Cannot write file", file_name);
  1190   }
  1191   return GraphToEps<DefaultGraphToEpsTraits<G> >
  1192     (DefaultGraphToEpsTraits<G>(g,*os,true));
  1193 }
  1194 
  1195 ///Generates an EPS file from a graph
  1196 
  1197 ///\ingroup eps_io
  1198 ///This function does the same as
  1199 ///\ref graphToEps(G &g,std::ostream& os)
  1200 ///but it writes its output into the file \c file_name
  1201 ///instead of a stream.
  1202 ///\sa graphToEps(G &g, std::ostream& os)
  1203 template<class G>
  1204 GraphToEps<DefaultGraphToEpsTraits<G> >
  1205 graphToEps(G &g,const std::string& file_name)
  1206 {
  1207   std::ostream* os = new std::ofstream(file_name.c_str());
  1208   if (!(*os)) {
  1209     delete os;
  1210     throw IoError("Cannot write file", file_name);
  1211   }
  1212   return GraphToEps<DefaultGraphToEpsTraits<G> >
  1213     (DefaultGraphToEpsTraits<G>(g,*os,true));
  1214 }
  1215 
  1216 } //END OF NAMESPACE LEMON
  1217 
  1218 #endif // LEMON_GRAPH_TO_EPS_H