lemon/graph_to_eps.h
author Peter Kovacs <kpeter@inf.elte.hu>
Sat, 05 Jul 2008 17:22:28 +0200
changeset 191 abc5b9d0c67e
parent 157 2ccc1afc2c52
child 206 4e22275a2b52
permissions -rw-r--r--
lgf_demo.cc is merged with reader_writer_demo.cc (from SVN -r3501)
     1 /* -*- C++ -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library
     4  *
     5  * Copyright (C) 2003-2008
     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 #define WIN32_LEAN_AND_MEAN
    33 #define NOMINMAX
    34 #include<windows.h>
    35 #endif
    36 
    37 #include<lemon/math.h>
    38 #include<lemon/bits/invalid.h>
    39 #include<lemon/dim2.h>
    40 #include<lemon/maps.h>
    41 #include<lemon/color.h>
    42 #include<lemon/bits/bezier.h>
    43 
    44 
    45 ///\ingroup eps_io
    46 ///\file
    47 ///\brief A well configurable tool for visualizing graphs
    48 
    49 namespace lemon {
    50 
    51   namespace _graph_to_eps_bits {
    52     template<class MT>
    53     class _NegY {
    54     public:
    55       typedef typename MT::Key Key;
    56       typedef typename MT::Value Value;
    57       const MT &map;
    58       int yscale;
    59       _NegY(const MT &m,bool b) : map(m), yscale(1-b*2) {}
    60       Value operator[](Key n) { return Value(map[n].x,map[n].y*yscale);}
    61     };
    62   }
    63   
    64 ///Default traits class of \ref GraphToEps
    65 
    66 ///Default traits class of \ref GraphToEps
    67 ///
    68 ///\c G is the type of the underlying graph.
    69 template<class G>
    70 struct DefaultGraphToEpsTraits
    71 {
    72   typedef G Graph;
    73   typedef typename Graph::Node Node;
    74   typedef typename Graph::NodeIt NodeIt;
    75   typedef typename Graph::Arc Arc;
    76   typedef typename Graph::ArcIt ArcIt;
    77   typedef typename Graph::InArcIt InArcIt;
    78   typedef typename Graph::OutArcIt OutArcIt;
    79   
    80 
    81   const Graph &g;
    82 
    83   std::ostream& os;
    84   
    85   typedef ConstMap<typename Graph::Node,dim2::Point<double> > CoordsMapType;
    86   CoordsMapType _coords;
    87   ConstMap<typename Graph::Node,double > _nodeSizes;
    88   ConstMap<typename Graph::Node,int > _nodeShapes;
    89 
    90   ConstMap<typename Graph::Node,Color > _nodeColors;
    91   ConstMap<typename Graph::Arc,Color > _arcColors;
    92 
    93   ConstMap<typename Graph::Arc,double > _arcWidths;
    94 
    95   double _arcWidthScale;
    96   
    97   double _nodeScale;
    98   double _xBorder, _yBorder;
    99   double _scale;
   100   double _nodeBorderQuotient;
   101   
   102   bool _drawArrows;
   103   double _arrowLength, _arrowWidth;
   104   
   105   bool _showNodes, _showArcs;
   106 
   107   bool _enableParallel;
   108   double _parArcDist;
   109 
   110   bool _showNodeText;
   111   ConstMap<typename Graph::Node,bool > _nodeTexts;  
   112   double _nodeTextSize;
   113 
   114   bool _showNodePsText;
   115   ConstMap<typename Graph::Node,bool > _nodePsTexts;  
   116   char *_nodePsTextsPreamble;
   117   
   118   bool _undirected;
   119 
   120   bool _pleaseRemoveOsStream;
   121 
   122   bool _scaleToA4;
   123 
   124   std::string _title;
   125   std::string _copyright;
   126 
   127   enum NodeTextColorType 
   128     { DIST_COL=0, DIST_BW=1, CUST_COL=2, SAME_COL=3 } _nodeTextColorType;
   129   ConstMap<typename Graph::Node,Color > _nodeTextColors;
   130 
   131   bool _autoNodeScale;
   132   bool _autoArcWidthScale;
   133 
   134   bool _absoluteNodeSizes;
   135   bool _absoluteArcWidths;
   136 
   137   bool _negY;
   138 
   139   bool _preScale;
   140   ///Constructor
   141 
   142   ///Constructor
   143   ///\param _g is a reference to the graph to be printed
   144   ///\param _os is a reference to the output stream.
   145   ///\param _os is a reference to the output stream.
   146   ///\param _pros If it is \c true, then the \c ostream referenced by \c _os
   147   ///will be explicitly deallocated by the destructor.
   148   ///By default it is <tt>std::cout</tt>
   149   DefaultGraphToEpsTraits(const G &_g,std::ostream& _os=std::cout,
   150 			  bool _pros=false) :
   151     g(_g), os(_os),
   152     _coords(dim2::Point<double>(1,1)), _nodeSizes(1), _nodeShapes(0),
   153     _nodeColors(WHITE), _arcColors(BLACK),
   154     _arcWidths(1.0), _arcWidthScale(0.003),
   155     _nodeScale(.01), _xBorder(10), _yBorder(10), _scale(1.0),
   156     _nodeBorderQuotient(.1),
   157     _drawArrows(false), _arrowLength(1), _arrowWidth(0.3),
   158     _showNodes(true), _showArcs(true),
   159     _enableParallel(false), _parArcDist(1),
   160     _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
   161     _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
   162     _undirected(lemon::UndirectedTagIndicator<G>::value),
   163     _pleaseRemoveOsStream(_pros), _scaleToA4(false),
   164     _nodeTextColorType(SAME_COL), _nodeTextColors(BLACK),
   165     _autoNodeScale(false),
   166     _autoArcWidthScale(false),
   167     _absoluteNodeSizes(false),
   168     _absoluteArcWidths(false),
   169     _negY(false),
   170     _preScale(true)
   171   {}
   172 };
   173 
   174 ///Auxiliary class to implement the named parameters of \ref graphToEps()
   175 
   176 ///Auxiliary class to implement the named parameters of \ref graphToEps()
   177 template<class T> class GraphToEps : public T 
   178 {
   179   // Can't believe it is required by the C++ standard
   180   using T::g;
   181   using T::os;
   182 
   183   using T::_coords;
   184   using T::_nodeSizes;
   185   using T::_nodeShapes;
   186   using T::_nodeColors;
   187   using T::_arcColors;
   188   using T::_arcWidths;
   189 
   190   using T::_arcWidthScale;
   191   using T::_nodeScale;
   192   using T::_xBorder;
   193   using T::_yBorder;
   194   using T::_scale;
   195   using T::_nodeBorderQuotient;
   196   
   197   using T::_drawArrows;
   198   using T::_arrowLength;
   199   using T::_arrowWidth;
   200   
   201   using T::_showNodes;
   202   using T::_showArcs;
   203 
   204   using T::_enableParallel;
   205   using T::_parArcDist;
   206 
   207   using T::_showNodeText;
   208   using T::_nodeTexts;  
   209   using T::_nodeTextSize;
   210 
   211   using T::_showNodePsText;
   212   using T::_nodePsTexts;  
   213   using T::_nodePsTextsPreamble;
   214   
   215   using T::_undirected;
   216 
   217   using T::_pleaseRemoveOsStream;
   218 
   219   using T::_scaleToA4;
   220 
   221   using T::_title;
   222   using T::_copyright;
   223 
   224   using T::NodeTextColorType;
   225   using T::CUST_COL;
   226   using T::DIST_COL;
   227   using T::DIST_BW;
   228   using T::_nodeTextColorType;
   229   using T::_nodeTextColors;
   230 
   231   using T::_autoNodeScale;
   232   using T::_autoArcWidthScale;
   233 
   234   using T::_absoluteNodeSizes;
   235   using T::_absoluteArcWidths;
   236 
   237 
   238   using T::_negY;
   239   using T::_preScale;
   240 
   241   // dradnats ++C eht yb deriuqer si ti eveileb t'naC
   242 
   243   typedef typename T::Graph Graph;
   244   typedef typename Graph::Node Node;
   245   typedef typename Graph::NodeIt NodeIt;
   246   typedef typename Graph::Arc Arc;
   247   typedef typename Graph::ArcIt ArcIt;
   248   typedef typename Graph::InArcIt InArcIt;
   249   typedef typename Graph::OutArcIt OutArcIt;
   250 
   251   static const int INTERPOL_PREC;
   252   static const double A4HEIGHT;
   253   static const double A4WIDTH;
   254   static const double A4BORDER;
   255 
   256   bool dontPrint;
   257 
   258 public:
   259   ///Node shapes
   260 
   261   ///Node shapes
   262   ///
   263   enum NodeShapes { 
   264     /// = 0
   265     ///\image html nodeshape_0.png
   266     ///\image latex nodeshape_0.eps "CIRCLE shape (0)" width=2cm
   267     CIRCLE=0, 
   268     /// = 1
   269     ///\image html nodeshape_1.png
   270     ///\image latex nodeshape_1.eps "SQUARE shape (1)" width=2cm
   271     ///
   272     SQUARE=1, 
   273     /// = 2
   274     ///\image html nodeshape_2.png
   275     ///\image latex nodeshape_2.eps "DIAMOND shape (2)" width=2cm
   276     ///
   277     DIAMOND=2,
   278     /// = 3
   279     ///\image html nodeshape_3.png
   280     ///\image latex nodeshape_2.eps "MALE shape (4)" width=2cm
   281     ///
   282     MALE=3,
   283     /// = 4
   284     ///\image html nodeshape_4.png
   285     ///\image latex nodeshape_2.eps "FEMALE shape (4)" width=2cm
   286     ///
   287     FEMALE=4
   288   };
   289 
   290 private:
   291   class arcLess {
   292     const Graph &g;
   293   public:
   294     arcLess(const Graph &_g) : g(_g) {}
   295     bool operator()(Arc a,Arc b) const 
   296     {
   297       Node ai=std::min(g.source(a),g.target(a));
   298       Node aa=std::max(g.source(a),g.target(a));
   299       Node bi=std::min(g.source(b),g.target(b));
   300       Node ba=std::max(g.source(b),g.target(b));
   301       return ai<bi ||
   302 	(ai==bi && (aa < ba || 
   303 		    (aa==ba && ai==g.source(a) && bi==g.target(b))));
   304     }
   305   };
   306   bool isParallel(Arc e,Arc f) const
   307   {
   308     return (g.source(e)==g.source(f)&&
   309 	    g.target(e)==g.target(f)) ||
   310       (g.source(e)==g.target(f)&&
   311        g.target(e)==g.source(f));
   312   }
   313   template<class TT>
   314   static std::string psOut(const dim2::Point<TT> &p) 
   315     {
   316       std::ostringstream os;	
   317       os << p.x << ' ' << p.y;
   318       return os.str();
   319     }
   320   static std::string psOut(const Color &c) 
   321     {
   322       std::ostringstream os;	
   323       os << c.red() << ' ' << c.green() << ' ' << c.blue();
   324       return os.str();
   325     }
   326   
   327 public:
   328   GraphToEps(const T &t) : T(t), dontPrint(false) {};
   329   
   330   template<class X> struct CoordsTraits : public T {
   331   typedef X CoordsMapType;
   332     const X &_coords;
   333     CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}
   334   };
   335   ///Sets the map of the node coordinates
   336 
   337   ///Sets the map of the node coordinates.
   338   ///\param x must be a node map with dim2::Point<double> or
   339   ///\ref dim2::Point "dim2::Point<int>" values. 
   340   template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
   341     dontPrint=true;
   342     return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));
   343   }
   344   template<class X> struct NodeSizesTraits : public T {
   345     const X &_nodeSizes;
   346     NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}
   347   };
   348   ///Sets the map of the node sizes
   349 
   350   ///Sets the map of the node sizes
   351   ///\param x must be a node map with \c double (or convertible) values. 
   352   template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)
   353   {
   354     dontPrint=true;
   355     return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));
   356   }
   357   template<class X> struct NodeShapesTraits : public T {
   358     const X &_nodeShapes;
   359     NodeShapesTraits(const T &t,const X &x) : T(t), _nodeShapes(x) {}
   360   };
   361   ///Sets the map of the node shapes
   362 
   363   ///Sets the map of the node shapes.
   364   ///The available shape values
   365   ///can be found in \ref NodeShapes "enum NodeShapes".
   366   ///\param x must be a node map with \c int (or convertible) values. 
   367   ///\sa NodeShapes
   368   template<class X> GraphToEps<NodeShapesTraits<X> > nodeShapes(const X &x)
   369   {
   370     dontPrint=true;
   371     return GraphToEps<NodeShapesTraits<X> >(NodeShapesTraits<X>(*this,x));
   372   }
   373   template<class X> struct NodeTextsTraits : public T {
   374     const X &_nodeTexts;
   375     NodeTextsTraits(const T &t,const X &x) : T(t), _nodeTexts(x) {}
   376   };
   377   ///Sets the text printed on the nodes
   378 
   379   ///Sets the text printed on the nodes
   380   ///\param x must be a node map with type that can be pushed to a standard
   381   ///ostream. 
   382   template<class X> GraphToEps<NodeTextsTraits<X> > nodeTexts(const X &x)
   383   {
   384     dontPrint=true;
   385     _showNodeText=true;
   386     return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
   387   }
   388   template<class X> struct NodePsTextsTraits : public T {
   389     const X &_nodePsTexts;
   390     NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
   391   };
   392   ///Inserts a PostScript block to the nodes
   393 
   394   ///With this command it is possible to insert a verbatim PostScript
   395   ///block to the nodes.
   396   ///The PS current point will be moved to the centre of the node before
   397   ///the PostScript block inserted.
   398   ///
   399   ///Before and after the block a newline character is inserted so you
   400   ///don't have to bother with the separators.
   401   ///
   402   ///\param x must be a node map with type that can be pushed to a standard
   403   ///ostream.
   404   ///
   405   ///\sa nodePsTextsPreamble()
   406   template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
   407   {
   408     dontPrint=true;
   409     _showNodePsText=true;
   410     return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
   411   }
   412   template<class X> struct ArcWidthsTraits : public T {
   413     const X &_arcWidths;
   414     ArcWidthsTraits(const T &t,const X &x) : T(t), _arcWidths(x) {}
   415   };
   416   ///Sets the map of the arc widths
   417 
   418   ///Sets the map of the arc widths
   419   ///\param x must be an arc map with \c double (or convertible) values. 
   420   template<class X> GraphToEps<ArcWidthsTraits<X> > arcWidths(const X &x)
   421   {
   422     dontPrint=true;
   423     return GraphToEps<ArcWidthsTraits<X> >(ArcWidthsTraits<X>(*this,x));
   424   }
   425 
   426   template<class X> struct NodeColorsTraits : public T {
   427     const X &_nodeColors;
   428     NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}
   429   };
   430   ///Sets the map of the node colors
   431 
   432   ///Sets the map of the node colors
   433   ///\param x must be a node map with \ref Color values.
   434   ///
   435   ///\sa Palette
   436   template<class X> GraphToEps<NodeColorsTraits<X> >
   437   nodeColors(const X &x)
   438   {
   439     dontPrint=true;
   440     return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));
   441   }
   442   template<class X> struct NodeTextColorsTraits : public T {
   443     const X &_nodeTextColors;
   444     NodeTextColorsTraits(const T &t,const X &x) : T(t), _nodeTextColors(x) {}
   445   };
   446   ///Sets the map of the node text colors
   447 
   448   ///Sets the map of the node text colors
   449   ///\param x must be a node map with \ref Color values. 
   450   ///
   451   ///\sa Palette
   452   template<class X> GraphToEps<NodeTextColorsTraits<X> >
   453   nodeTextColors(const X &x)
   454   {
   455     dontPrint=true;
   456     _nodeTextColorType=CUST_COL;
   457     return GraphToEps<NodeTextColorsTraits<X> >
   458       (NodeTextColorsTraits<X>(*this,x));
   459   }
   460   template<class X> struct ArcColorsTraits : public T {
   461     const X &_arcColors;
   462     ArcColorsTraits(const T &t,const X &x) : T(t), _arcColors(x) {}
   463   };
   464   ///Sets the map of the arc colors
   465 
   466   ///Sets the map of the arc colors
   467   ///\param x must be an arc map with \ref Color values. 
   468   ///
   469   ///\sa Palette
   470   template<class X> GraphToEps<ArcColorsTraits<X> >
   471   arcColors(const X &x)
   472   {
   473     dontPrint=true;
   474     return GraphToEps<ArcColorsTraits<X> >(ArcColorsTraits<X>(*this,x));
   475   }
   476   ///Sets a global scale factor for node sizes
   477 
   478   ///Sets a global scale factor for node sizes.
   479   /// 
   480   /// If nodeSizes() is not given, this function simply sets the node
   481   /// sizes to \c d.  If nodeSizes() is given, but
   482   /// autoNodeScale() is not, then the node size given by
   483   /// nodeSizes() will be multiplied by the value \c d.
   484   /// If both nodeSizes() and autoNodeScale() are used, then the
   485   /// node sizes will be scaled in such a way that the greatest size will be
   486   /// equal to \c d.
   487   /// \sa nodeSizes()
   488   /// \sa autoNodeScale()
   489   GraphToEps<T> &nodeScale(double d=.01) {_nodeScale=d;return *this;}
   490   ///Turns on/off the automatic node width scaling.
   491 
   492   ///Turns on/off the automatic node width scaling.
   493   ///
   494   ///\sa nodeScale()
   495   ///
   496   GraphToEps<T> &autoNodeScale(bool b=true) {
   497     _autoNodeScale=b;return *this;
   498   }
   499 
   500   ///Turns on/off the absolutematic node width scaling.
   501 
   502   ///Turns on/off the absolutematic node width scaling.
   503   ///
   504   ///\sa nodeScale()
   505   ///
   506   GraphToEps<T> &absoluteNodeSizes(bool b=true) {
   507     _absoluteNodeSizes=b;return *this;
   508   }
   509 
   510   ///Negates the Y coordinates.
   511 
   512   ///Negates the Y coordinates.
   513   ///
   514   GraphToEps<T> &negateY(bool b=true) {
   515     _negY=b;return *this;
   516   }
   517 
   518   ///Turn on/off pre-scaling
   519 
   520   ///By default graphToEps() rescales the whole image in order to avoid
   521   ///very big or very small bounding boxes.
   522   ///
   523   ///This (p)rescaling can be turned off with this function.
   524   ///
   525   GraphToEps<T> &preScale(bool b=true) {
   526     _preScale=b;return *this;
   527   }
   528 
   529   ///Sets a global scale factor for arc widths
   530 
   531   /// Sets a global scale factor for arc widths.
   532   ///
   533   /// If arcWidths() is not given, this function simply sets the arc
   534   /// widths to \c d.  If arcWidths() is given, but
   535   /// autoArcWidthScale() is not, then the arc withs given by
   536   /// arcWidths() will be multiplied by the value \c d.
   537   /// If both arcWidths() and autoArcWidthScale() are used, then the
   538   /// arc withs will be scaled in such a way that the greatest width will be
   539   /// equal to \c d.
   540   GraphToEps<T> &arcWidthScale(double d=.003) {_arcWidthScale=d;return *this;}
   541   ///Turns on/off the automatic arc width scaling.
   542 
   543   ///Turns on/off the automatic arc width scaling.
   544   ///
   545   ///\sa arcWidthScale()
   546   ///
   547   GraphToEps<T> &autoArcWidthScale(bool b=true) {
   548     _autoArcWidthScale=b;return *this;
   549   }
   550   ///Turns on/off the absolutematic arc width scaling.
   551 
   552   ///Turns on/off the absolutematic arc width scaling.
   553   ///
   554   ///\sa arcWidthScale()
   555   ///
   556   GraphToEps<T> &absoluteArcWidths(bool b=true) {
   557     _absoluteArcWidths=b;return *this;
   558   }
   559   ///Sets a global scale factor for the whole picture
   560 
   561   ///Sets a global scale factor for the whole picture
   562   ///
   563 
   564   GraphToEps<T> &scale(double d) {_scale=d;return *this;}
   565   ///Sets the width of the border around the picture
   566 
   567   ///Sets the width of the border around the picture
   568   ///
   569   GraphToEps<T> &border(double b=10) {_xBorder=_yBorder=b;return *this;}
   570   ///Sets the width of the border around the picture
   571 
   572   ///Sets the width of the border around the picture
   573   ///
   574   GraphToEps<T> &border(double x, double y) {
   575     _xBorder=x;_yBorder=y;return *this;
   576   }
   577   ///Sets whether to draw arrows
   578 
   579   ///Sets whether to draw arrows
   580   ///
   581   GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}
   582   ///Sets the length of the arrowheads
   583 
   584   ///Sets the length of the arrowheads
   585   ///
   586   GraphToEps<T> &arrowLength(double d=1.0) {_arrowLength*=d;return *this;}
   587   ///Sets the width of the arrowheads
   588 
   589   ///Sets the width of the arrowheads
   590   ///
   591   GraphToEps<T> &arrowWidth(double d=.3) {_arrowWidth*=d;return *this;}
   592   
   593   ///Scales the drawing to fit to A4 page
   594 
   595   ///Scales the drawing to fit to A4 page
   596   ///
   597   GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
   598   
   599   ///Enables parallel arcs
   600 
   601   ///Enables parallel arcs
   602   GraphToEps<T> &enableParallel(bool b=true) {_enableParallel=b;return *this;}
   603   
   604   ///Sets the distance 
   605   
   606   ///Sets the distance 
   607   ///
   608   GraphToEps<T> &parArcDist(double d) {_parArcDist*=d;return *this;}
   609   
   610   ///Hides the arcs
   611   
   612   ///Hides the arcs
   613   ///
   614   GraphToEps<T> &hideArcs(bool b=true) {_showArcs=!b;return *this;}
   615   ///Hides the nodes
   616   
   617   ///Hides the nodes
   618   ///
   619   GraphToEps<T> &hideNodes(bool b=true) {_showNodes=!b;return *this;}
   620   
   621   ///Sets the size of the node texts
   622   
   623   ///Sets the size of the node texts
   624   ///
   625   GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
   626 
   627   ///Sets the color of the node texts to be different from the node color
   628 
   629   ///Sets the color of the node texts to be as different from the node color
   630   ///as it is possible
   631   ///
   632   GraphToEps<T> &distantColorNodeTexts()
   633   {_nodeTextColorType=DIST_COL;return *this;}
   634   ///Sets the color of the node texts to be black or white and always visible.
   635 
   636   ///Sets the color of the node texts to be black or white according to
   637   ///which is more 
   638   ///different from the node color
   639   ///
   640   GraphToEps<T> &distantBWNodeTexts()
   641   {_nodeTextColorType=DIST_BW;return *this;}
   642 
   643   ///Gives a preamble block for node Postscript block.
   644   
   645   ///Gives a preamble block for node Postscript block.
   646   ///
   647   ///\sa nodePsTexts()
   648   GraphToEps<T> & nodePsTextsPreamble(const char *str) {
   649     _nodePsTextsPreamble=str ;return *this;
   650   }
   651   ///Sets whether the the graph is undirected
   652 
   653   ///Sets whether the the graph is undirected.
   654   ///
   655   ///This setting is the default for undirected graphs.
   656   ///
   657   ///\sa directed()
   658    GraphToEps<T> &undirected(bool b=true) {_undirected=b;return *this;}
   659 
   660   ///Sets whether the the graph is directed
   661 
   662   ///Sets whether the the graph is directed.
   663   ///Use it to show the edges as a pair of directed ones.
   664   ///
   665   ///This setting is the default for digraphs.
   666   ///
   667   ///\sa undirected()
   668   GraphToEps<T> &directed(bool b=true) {_undirected=!b;return *this;}
   669   
   670   ///Sets the title.
   671 
   672   ///Sets the title of the generated image,
   673   ///namely it inserts a <tt>%%Title:</tt> DSC field to the header of
   674   ///the EPS file.
   675   GraphToEps<T> &title(const std::string &t) {_title=t;return *this;}
   676   ///Sets the copyright statement.
   677 
   678   ///Sets the copyright statement of the generated image,
   679   ///namely it inserts a <tt>%%Copyright:</tt> DSC field to the header of
   680   ///the EPS file.
   681   GraphToEps<T> &copyright(const std::string &t) {_copyright=t;return *this;}
   682 
   683 protected:
   684   bool isInsideNode(dim2::Point<double> p, double r,int t) 
   685   {
   686     switch(t) {
   687     case CIRCLE:
   688     case MALE:
   689     case FEMALE:
   690       return p.normSquare()<=r*r;
   691     case SQUARE:
   692       return p.x<=r&&p.x>=-r&&p.y<=r&&p.y>=-r;
   693     case DIAMOND:
   694       return p.x+p.y<=r && p.x-p.y<=r && -p.x+p.y<=r && -p.x-p.y<=r;
   695     }
   696     return false;
   697   }
   698 
   699 public:
   700   ~GraphToEps() { }
   701   
   702   ///Draws the graph.
   703 
   704   ///Like other functions using
   705   ///\ref named-templ-func-param "named template parameters",
   706   ///this function calls the algorithm itself, i.e. in this case
   707   ///it draws the graph.
   708   void run() {
   709     //\todo better 'epsilon' would be nice here.
   710     const double EPSILON=1e-9;
   711     if(dontPrint) return;
   712     
   713     _graph_to_eps_bits::_NegY<typename T::CoordsMapType>
   714       mycoords(_coords,_negY);
   715 
   716     os << "%!PS-Adobe-2.0 EPSF-2.0\n";
   717     if(_title.size()>0) os << "%%Title: " << _title << '\n';
   718      if(_copyright.size()>0) os << "%%Copyright: " << _copyright << '\n';
   719 //        << "%%Copyright: XXXX\n"
   720     os << "%%Creator: LEMON, graphToEps()\n";
   721 
   722     {    
   723 #ifndef WIN32 
   724       timeval tv;
   725       gettimeofday(&tv, 0);
   726 
   727       char cbuf[26];
   728       ctime_r(&tv.tv_sec,cbuf);
   729       os << "%%CreationDate: " << cbuf;
   730 #else
   731       SYSTEMTIME time;
   732       char buf1[11], buf2[9], buf3[5];
   733       
   734       GetSystemTime(&time);
   735       if (GetDateFormat(LOCALE_USER_DEFAULT, 0, &time, 
   736 			"ddd MMM dd", buf1, 11) &&
   737 	  GetTimeFormat(LOCALE_USER_DEFAULT, 0, &time, 
   738 			"HH':'mm':'ss", buf2, 9) &&
   739 	  GetDateFormat(LOCALE_USER_DEFAULT, 0, &time, 
   740 				"yyyy", buf3, 5)) {
   741 	os << "%%CreationDate: " << buf1 << ' ' 
   742 	   << buf2 << ' ' << buf3 << std::endl;
   743       }	  
   744 #endif
   745     }
   746 
   747     if (_autoArcWidthScale) {
   748       double max_w=0;
   749       for(ArcIt e(g);e!=INVALID;++e)
   750 	max_w=std::max(double(_arcWidths[e]),max_w);
   751       ///\todo better 'epsilon' would be nice here.
   752       if(max_w>EPSILON) {
   753 	_arcWidthScale/=max_w;
   754       }
   755     }
   756 
   757     if (_autoNodeScale) {
   758       double max_s=0;
   759       for(NodeIt n(g);n!=INVALID;++n)
   760 	max_s=std::max(double(_nodeSizes[n]),max_s);
   761       ///\todo better 'epsilon' would be nice here.
   762       if(max_s>EPSILON) {
   763 	_nodeScale/=max_s;
   764       }
   765     }
   766 
   767     double diag_len = 1;
   768     if(!(_absoluteNodeSizes&&_absoluteArcWidths)) {
   769       dim2::BoundingBox<double> bb;
   770       for(NodeIt n(g);n!=INVALID;++n) bb.add(mycoords[n]);
   771       if (bb.empty()) {
   772 	bb = dim2::BoundingBox<double>(dim2::Point<double>(0,0));
   773       }
   774       diag_len = std::sqrt((bb.bottomLeft()-bb.topRight()).normSquare());
   775       if(diag_len<EPSILON) diag_len = 1;
   776       if(!_absoluteNodeSizes) _nodeScale*=diag_len;
   777       if(!_absoluteArcWidths) _arcWidthScale*=diag_len;
   778     }
   779     
   780     dim2::BoundingBox<double> bb;
   781     for(NodeIt n(g);n!=INVALID;++n) {
   782       double ns=_nodeSizes[n]*_nodeScale;
   783       dim2::Point<double> p(ns,ns);
   784       switch(_nodeShapes[n]) {
   785       case CIRCLE:
   786       case SQUARE:
   787       case DIAMOND:
   788 	bb.add(p+mycoords[n]);
   789 	bb.add(-p+mycoords[n]);
   790 	break;
   791       case MALE:
   792 	bb.add(-p+mycoords[n]);
   793 	bb.add(dim2::Point<double>(1.5*ns,1.5*std::sqrt(3.0)*ns)+mycoords[n]);
   794 	break;
   795       case FEMALE:
   796 	bb.add(p+mycoords[n]);
   797 	bb.add(dim2::Point<double>(-ns,-3.01*ns)+mycoords[n]);
   798 	break;
   799       }
   800     }
   801     if (bb.empty()) {
   802       bb = dim2::BoundingBox<double>(dim2::Point<double>(0,0));
   803     }
   804     
   805     if(_scaleToA4)
   806       os <<"%%BoundingBox: 0 0 596 842\n%%DocumentPaperSizes: a4\n";
   807     else {
   808       if(_preScale) {
   809 	//Rescale so that BoundingBox won't be neither to big nor too small.
   810 	while(bb.height()*_scale>1000||bb.width()*_scale>1000) _scale/=10;
   811 	while(bb.height()*_scale<100||bb.width()*_scale<100) _scale*=10;
   812       }
   813       
   814       os << "%%BoundingBox: "
   815 	 << int(floor(bb.left()   * _scale - _xBorder)) << ' '
   816 	 << int(floor(bb.bottom() * _scale - _yBorder)) << ' '
   817 	 << int(ceil(bb.right()  * _scale + _xBorder)) << ' '
   818 	 << int(ceil(bb.top()    * _scale + _yBorder)) << '\n';
   819     }
   820     
   821     os << "%%EndComments\n";
   822     
   823     //x1 y1 x2 y2 x3 y3 cr cg cb w
   824     os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
   825        << "      4 2 roll 1 index 1 index curveto stroke } bind def\n";
   826     os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke } bind def\n";
   827     //x y r
   828     os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath } bind def\n";
   829     //x y r
   830     os << "/sq { newpath 2 index 1 index add 2 index 2 index add moveto\n"
   831        << "      2 index 1 index sub 2 index 2 index add lineto\n"
   832        << "      2 index 1 index sub 2 index 2 index sub lineto\n"
   833        << "      2 index 1 index add 2 index 2 index sub lineto\n"
   834        << "      closepath pop pop pop} bind def\n";
   835     //x y r
   836     os << "/di { newpath 2 index 1 index add 2 index moveto\n"
   837        << "      2 index             2 index 2 index add lineto\n"
   838        << "      2 index 1 index sub 2 index             lineto\n"
   839        << "      2 index             2 index 2 index sub lineto\n"
   840        << "      closepath pop pop pop} bind def\n";
   841     // x y r cr cg cb
   842     os << "/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill\n"
   843        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   844        << "   } bind def\n";
   845     os << "/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill\n"
   846        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div sq fill\n"
   847        << "   } bind def\n";
   848     os << "/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill\n"
   849        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div di fill\n"
   850        << "   } bind def\n";
   851     os << "/nfemale { 0 0 0 setrgbcolor 3 index "
   852        << _nodeBorderQuotient/(1+_nodeBorderQuotient)
   853        << " 1.5 mul mul setlinewidth\n"
   854        << "  newpath 5 index 5 index moveto "
   855        << "5 index 5 index 5 index 3.01 mul sub\n"
   856        << "  lineto 5 index 4 index .7 mul sub 5 index 5 index 2.2 mul sub moveto\n"
   857        << "  5 index 4 index .7 mul add 5 index 5 index 2.2 mul sub lineto stroke\n"
   858        << "  5 index 5 index 5 index c fill\n"
   859        << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   860        << "  } bind def\n";
   861     os << "/nmale {\n"
   862        << "  0 0 0 setrgbcolor 3 index "
   863        << _nodeBorderQuotient/(1+_nodeBorderQuotient)
   864        <<" 1.5 mul mul setlinewidth\n"
   865        << "  newpath 5 index 5 index moveto\n"
   866        << "  5 index 4 index 1 mul 1.5 mul add\n"
   867        << "  5 index 5 index 3 sqrt 1.5 mul mul add\n"
   868        << "  1 index 1 index lineto\n"
   869        << "  1 index 1 index 7 index sub moveto\n"
   870        << "  1 index 1 index lineto\n"
   871        << "  exch 5 index 3 sqrt .5 mul mul sub exch 5 index .5 mul sub lineto\n"
   872        << "  stroke\n"
   873        << "  5 index 5 index 5 index c fill\n"
   874        << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   875        << "  } bind def\n";
   876     
   877 
   878     os << "/arrl " << _arrowLength << " def\n";
   879     os << "/arrw " << _arrowWidth << " def\n";
   880     // l dx_norm dy_norm
   881     os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";
   882     //len w dx_norm dy_norm x1 y1 cr cg cb
   883     os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx exch def\n"
   884        << "       /w exch def /len exch def\n"
   885       //	 << "       0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"
   886        << "       newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"
   887        << "       len w sub arrl sub dx dy lrl\n"
   888        << "       arrw dy dx neg lrl\n"
   889        << "       dx arrl w add mul dy w 2 div arrw add mul sub\n"
   890        << "       dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"
   891        << "       dx arrl w add mul neg dy w 2 div arrw add mul sub\n"
   892        << "       dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"
   893        << "       arrw dy dx neg lrl\n"
   894        << "       len w sub arrl sub neg dx dy lrl\n"
   895        << "       closepath fill } bind def\n";
   896     os << "/cshow { 2 index 2 index moveto dup stringwidth pop\n"
   897        << "         neg 2 div fosi .35 mul neg rmoveto show pop pop} def\n";
   898 
   899     os << "\ngsave\n";
   900     if(_scaleToA4)
   901       if(bb.height()>bb.width()) {
   902 	double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.height(),
   903 		  (A4WIDTH-2*A4BORDER)/bb.width());
   904 	os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
   905 	   << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER
   906 	   << " translate\n"
   907 	   << sc << " dup scale\n"
   908 	   << -bb.left() << ' ' << -bb.bottom() << " translate\n";
   909       }
   910       else {
   911 	//\todo Verify centering
   912 	double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.width(),
   913 		  (A4WIDTH-2*A4BORDER)/bb.height());
   914 	os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
   915 	   << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER 
   916 	   << " translate\n"
   917 	   << sc << " dup scale\n90 rotate\n"
   918 	   << -bb.left() << ' ' << -bb.top() << " translate\n";	
   919 	}
   920     else if(_scale!=1.0) os << _scale << " dup scale\n";
   921     
   922     if(_showArcs) {
   923       os << "%Arcs:\ngsave\n";      
   924       if(_enableParallel) {
   925 	std::vector<Arc> el;
   926 	for(ArcIt e(g);e!=INVALID;++e)
   927 	  if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
   928 	     &&g.source(e)!=g.target(e))
   929 	    el.push_back(e);
   930 	std::sort(el.begin(),el.end(),arcLess(g));
   931 	
   932 	typename std::vector<Arc>::iterator j;
   933 	for(typename std::vector<Arc>::iterator i=el.begin();i!=el.end();i=j) {
   934 	  for(j=i+1;j!=el.end()&&isParallel(*i,*j);++j) ;
   935 
   936 	  double sw=0;
   937 	  for(typename std::vector<Arc>::iterator e=i;e!=j;++e)
   938 	    sw+=_arcWidths[*e]*_arcWidthScale+_parArcDist;
   939 	  sw-=_parArcDist;
   940 	  sw/=-2.0;
   941 	  dim2::Point<double>
   942 	    dvec(mycoords[g.target(*i)]-mycoords[g.source(*i)]);
   943 	  double l=std::sqrt(dvec.normSquare()); 
   944 	  //\todo better 'epsilon' would be nice here.
   945 	  dim2::Point<double> d(dvec/std::max(l,EPSILON));
   946  	  dim2::Point<double> m;
   947 // 	  m=dim2::Point<double>(mycoords[g.target(*i)]+mycoords[g.source(*i)])/2.0;
   948 
   949 //  	  m=dim2::Point<double>(mycoords[g.source(*i)])+
   950 // 	    dvec*(double(_nodeSizes[g.source(*i)])/
   951 // 	       (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
   952 
   953  	  m=dim2::Point<double>(mycoords[g.source(*i)])+
   954 	    d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
   955 
   956 	  for(typename std::vector<Arc>::iterator e=i;e!=j;++e) {
   957 	    sw+=_arcWidths[*e]*_arcWidthScale/2.0;
   958 	    dim2::Point<double> mm=m+rot90(d)*sw/.75;
   959 	    if(_drawArrows) {
   960 	      int node_shape;
   961 	      dim2::Point<double> s=mycoords[g.source(*e)];
   962 	      dim2::Point<double> t=mycoords[g.target(*e)];
   963 	      double rn=_nodeSizes[g.target(*e)]*_nodeScale;
   964 	      node_shape=_nodeShapes[g.target(*e)];
   965 	      dim2::Bezier3 bez(s,mm,mm,t);
   966 	      double t1=0,t2=1;
   967 	      for(int ii=0;ii<INTERPOL_PREC;++ii)
   968 		if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t2=(t1+t2)/2;
   969 		else t1=(t1+t2)/2;
   970 	      dim2::Point<double> apoint=bez((t1+t2)/2);
   971 	      rn = _arrowLength+_arcWidths[*e]*_arcWidthScale;
   972 	      rn*=rn;
   973 	      t2=(t1+t2)/2;t1=0;
   974 	      for(int ii=0;ii<INTERPOL_PREC;++ii)
   975 		if((bez((t1+t2)/2)-apoint).normSquare()>rn) t1=(t1+t2)/2;
   976 		else t2=(t1+t2)/2;
   977 	      dim2::Point<double> linend=bez((t1+t2)/2);	      
   978 	      bez=bez.before((t1+t2)/2);
   979 // 	      rn=_nodeSizes[g.source(*e)]*_nodeScale;
   980 // 	      node_shape=_nodeShapes[g.source(*e)];
   981 // 	      t1=0;t2=1;
   982 // 	      for(int i=0;i<INTERPOL_PREC;++i)
   983 // 		if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t1=(t1+t2)/2;
   984 // 		else t2=(t1+t2)/2;
   985 // 	      bez=bez.after((t1+t2)/2);
   986 	      os << _arcWidths[*e]*_arcWidthScale << " setlinewidth "
   987 		 << _arcColors[*e].red() << ' '
   988 		 << _arcColors[*e].green() << ' '
   989 		 << _arcColors[*e].blue() << " setrgbcolor newpath\n"
   990 		 << bez.p1.x << ' ' <<  bez.p1.y << " moveto\n"
   991 		 << bez.p2.x << ' ' << bez.p2.y << ' '
   992 		 << bez.p3.x << ' ' << bez.p3.y << ' '
   993 		 << bez.p4.x << ' ' << bez.p4.y << " curveto stroke\n";
   994 	      dim2::Point<double> dd(rot90(linend-apoint));
   995 	      dd*=(.5*_arcWidths[*e]*_arcWidthScale+_arrowWidth)/
   996 		std::sqrt(dd.normSquare());
   997 	      os << "newpath " << psOut(apoint) << " moveto "
   998 		 << psOut(linend+dd) << " lineto "
   999 		 << psOut(linend-dd) << " lineto closepath fill\n";
  1000 	    }
  1001 	    else {
  1002 	      os << mycoords[g.source(*e)].x << ' '
  1003 		 << mycoords[g.source(*e)].y << ' '
  1004 		 << mm.x << ' ' << mm.y << ' '
  1005 		 << mycoords[g.target(*e)].x << ' '
  1006 		 << mycoords[g.target(*e)].y << ' '
  1007 		 << _arcColors[*e].red() << ' '
  1008 		 << _arcColors[*e].green() << ' '
  1009 		 << _arcColors[*e].blue() << ' '
  1010 		 << _arcWidths[*e]*_arcWidthScale << " lb\n";
  1011 	    }
  1012 	    sw+=_arcWidths[*e]*_arcWidthScale/2.0+_parArcDist;
  1013 	  }
  1014 	}
  1015       }
  1016       else for(ArcIt e(g);e!=INVALID;++e)
  1017 	if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
  1018 	   &&g.source(e)!=g.target(e)) {
  1019 	  if(_drawArrows) {
  1020 	    dim2::Point<double> d(mycoords[g.target(e)]-mycoords[g.source(e)]);
  1021 	    double rn=_nodeSizes[g.target(e)]*_nodeScale;
  1022 	    int node_shape=_nodeShapes[g.target(e)];
  1023 	    double t1=0,t2=1;
  1024 	    for(int i=0;i<INTERPOL_PREC;++i)
  1025 	      if(isInsideNode((-(t1+t2)/2)*d,rn,node_shape)) t1=(t1+t2)/2;
  1026 	      else t2=(t1+t2)/2;
  1027 	    double l=std::sqrt(d.normSquare());
  1028 	    d/=l;
  1029 	    
  1030 	    os << l*(1-(t1+t2)/2) << ' '
  1031 	       << _arcWidths[e]*_arcWidthScale << ' '
  1032 	       << d.x << ' ' << d.y << ' '
  1033 	       << mycoords[g.source(e)].x << ' '
  1034 	       << mycoords[g.source(e)].y << ' '
  1035 	       << _arcColors[e].red() << ' '
  1036 	       << _arcColors[e].green() << ' '
  1037 	       << _arcColors[e].blue() << " arr\n";
  1038 	  } 
  1039 	  else os << mycoords[g.source(e)].x << ' '
  1040 		  << mycoords[g.source(e)].y << ' '
  1041 		  << mycoords[g.target(e)].x << ' '
  1042 		  << mycoords[g.target(e)].y << ' '
  1043 		  << _arcColors[e].red() << ' '
  1044 		  << _arcColors[e].green() << ' '
  1045 		  << _arcColors[e].blue() << ' '
  1046 		  << _arcWidths[e]*_arcWidthScale << " l\n";
  1047 	}
  1048       os << "grestore\n";
  1049     }
  1050     if(_showNodes) {
  1051       os << "%Nodes:\ngsave\n";
  1052       for(NodeIt n(g);n!=INVALID;++n) {
  1053 	os << mycoords[n].x << ' ' << mycoords[n].y << ' '
  1054 	   << _nodeSizes[n]*_nodeScale << ' '
  1055 	   << _nodeColors[n].red() << ' '
  1056 	   << _nodeColors[n].green() << ' '
  1057 	   << _nodeColors[n].blue() << ' ';
  1058 	switch(_nodeShapes[n]) {
  1059 	case CIRCLE:
  1060 	  os<< "nc";break;
  1061 	case SQUARE:
  1062 	  os<< "nsq";break;
  1063 	case DIAMOND:
  1064 	  os<< "ndi";break;
  1065 	case MALE:
  1066 	  os<< "nmale";break;
  1067 	case FEMALE:
  1068 	  os<< "nfemale";break;
  1069 	}
  1070 	os<<'\n';
  1071       }
  1072       os << "grestore\n";
  1073     }
  1074     if(_showNodeText) {
  1075       os << "%Node texts:\ngsave\n";
  1076       os << "/fosi " << _nodeTextSize << " def\n";
  1077       os << "(Helvetica) findfont fosi scalefont setfont\n";
  1078       for(NodeIt n(g);n!=INVALID;++n) {
  1079 	switch(_nodeTextColorType) {
  1080 	case DIST_COL:
  1081 	  os << psOut(distantColor(_nodeColors[n])) << " setrgbcolor\n";
  1082 	  break;
  1083 	case DIST_BW:
  1084 	  os << psOut(distantBW(_nodeColors[n])) << " setrgbcolor\n";
  1085 	  break;
  1086 	case CUST_COL:
  1087 	  os << psOut(distantColor(_nodeTextColors[n])) << " setrgbcolor\n";
  1088 	  break;
  1089 	default:
  1090 	  os << "0 0 0 setrgbcolor\n";
  1091 	}
  1092 	os << mycoords[n].x << ' ' << mycoords[n].y
  1093 	   << " (" << _nodeTexts[n] << ") cshow\n";
  1094       }
  1095       os << "grestore\n";
  1096     }
  1097     if(_showNodePsText) {
  1098       os << "%Node PS blocks:\ngsave\n";
  1099       for(NodeIt n(g);n!=INVALID;++n)
  1100 	os << mycoords[n].x << ' ' << mycoords[n].y
  1101 	   << " moveto\n" << _nodePsTexts[n] << "\n";
  1102       os << "grestore\n";
  1103     }
  1104     
  1105     os << "grestore\nshowpage\n";
  1106 
  1107     //CleanUp:
  1108     if(_pleaseRemoveOsStream) {delete &os;}
  1109   }
  1110 
  1111   ///\name Aliases
  1112   ///These are just some aliases to other parameter setting functions.
  1113 
  1114   ///@{
  1115 
  1116   ///An alias for arcWidths()
  1117 
  1118   ///An alias for arcWidths()
  1119   ///
  1120   template<class X> GraphToEps<ArcWidthsTraits<X> > edgeWidths(const X &x)
  1121   {
  1122     return arcWidths(x);
  1123   }
  1124 
  1125   ///An alias for arcColors()
  1126 
  1127   ///An alias for arcColors()
  1128   ///
  1129   template<class X> GraphToEps<ArcColorsTraits<X> >
  1130   edgeColors(const X &x)
  1131   {
  1132     return arcColors(x);
  1133   }
  1134 
  1135   ///An alias for arcWidthScale()
  1136 
  1137   ///An alias for arcWidthScale()
  1138   ///
  1139   GraphToEps<T> &edgeWidthScale(double d) {return arcWidthScale(d);}
  1140 
  1141   ///An alias for autoArcWidthScale()
  1142 
  1143   ///An alias for autoArcWidthScale()
  1144   ///
  1145   GraphToEps<T> &autoEdgeWidthScale(bool b=true)
  1146   {
  1147     return autoArcWidthScale(b);
  1148   }
  1149   
  1150   ///An alias for absoluteArcWidths()
  1151 
  1152   ///An alias for absoluteArcWidths()
  1153   ///
  1154   GraphToEps<T> &absoluteEdgeWidths(bool b=true)
  1155   {
  1156     return absoluteArcWidths(b);
  1157   }
  1158   
  1159   ///An alias for parArcDist()
  1160 
  1161   ///An alias for parArcDist()
  1162   ///
  1163   GraphToEps<T> &parEdgeDist(double d) {return parArcDist(d);}
  1164   
  1165   ///An alias for hideArcs()
  1166   
  1167   ///An alias for hideArcs()
  1168   ///
  1169   GraphToEps<T> &hideEdges(bool b=true) {return hideArcs(b);}
  1170 
  1171   ///@}
  1172 };
  1173 
  1174 template<class T>
  1175 const int GraphToEps<T>::INTERPOL_PREC = 20;
  1176 template<class T>
  1177 const double GraphToEps<T>::A4HEIGHT = 841.8897637795276;
  1178 template<class T>
  1179 const double GraphToEps<T>::A4WIDTH  = 595.275590551181;
  1180 template<class T>
  1181 const double GraphToEps<T>::A4BORDER = 15;
  1182 
  1183 
  1184 ///Generates an EPS file from a graph
  1185 
  1186 ///\ingroup eps_io
  1187 ///Generates an EPS file from a graph.
  1188 ///\param g is a reference to the graph to be printed
  1189 ///\param os is a reference to the output stream.
  1190 ///By default it is <tt>std::cout</tt>
  1191 ///
  1192 ///This function also has a lot of
  1193 ///\ref named-templ-func-param "named parameters",
  1194 ///they are declared as the members of class \ref GraphToEps. The following
  1195 ///example shows how to use these parameters.
  1196 ///\code
  1197 /// graphToEps(g,os).scale(10).coords(coords)
  1198 ///              .nodeScale(2).nodeSizes(sizes)
  1199 ///              .arcWidthScale(.4).run();
  1200 ///\endcode
  1201 ///\warning Don't forget to put the \ref GraphToEps::run() "run()"
  1202 ///to the end of the parameter list.
  1203 ///\sa GraphToEps
  1204 ///\sa graphToEps(G &g, const char *file_name)
  1205 template<class G>
  1206 GraphToEps<DefaultGraphToEpsTraits<G> > 
  1207 graphToEps(G &g, std::ostream& os=std::cout)
  1208 {
  1209   return 
  1210     GraphToEps<DefaultGraphToEpsTraits<G> >(DefaultGraphToEpsTraits<G>(g,os));
  1211 }
  1212  
  1213 ///Generates an EPS file from a graph
  1214 
  1215 ///\ingroup eps_io
  1216 ///This function does the same as
  1217 ///\ref graphToEps(G &g,std::ostream& os)
  1218 ///but it writes its output into the file \c file_name
  1219 ///instead of a stream.
  1220 ///\sa graphToEps(G &g, std::ostream& os)
  1221 template<class G>
  1222 GraphToEps<DefaultGraphToEpsTraits<G> > 
  1223 graphToEps(G &g,const char *file_name)
  1224 {
  1225   return GraphToEps<DefaultGraphToEpsTraits<G> >
  1226     (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name),true));
  1227 }
  1228 
  1229 ///Generates an EPS file from a graph
  1230 
  1231 ///\ingroup eps_io
  1232 ///This function does the same as
  1233 ///\ref graphToEps(G &g,std::ostream& os)
  1234 ///but it writes its output into the file \c file_name
  1235 ///instead of a stream.
  1236 ///\sa graphToEps(G &g, std::ostream& os)
  1237 template<class G>
  1238 GraphToEps<DefaultGraphToEpsTraits<G> > 
  1239 graphToEps(G &g,const std::string& file_name)
  1240 {
  1241   return GraphToEps<DefaultGraphToEpsTraits<G> >
  1242     (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name.c_str()),true));
  1243 }
  1244 
  1245 } //END OF NAMESPACE LEMON
  1246 
  1247 #endif // LEMON_GRAPH_TO_EPS_H