lemon/graph_to_eps.h
author Balazs Dezso <deba@inf.elte.hu>
Tue, 22 Apr 2008 15:07:04 +0200
changeset 140 356930927a71
parent 133 d76e2ff9c70d
child 143 c3b45bb643b0
permissions -rw-r--r--
New implementation of GRAPH_TYPEDEFS
     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 #include<windows.h>
    33 #endif
    34 
    35 #include<lemon/math.h>
    36 #include<lemon/bits/invalid.h>
    37 #include<lemon/dim2.h>
    38 #include<lemon/maps.h>
    39 #include<lemon/color.h>
    40 #include<lemon/bits/bezier.h>
    41 
    42 
    43 ///\ingroup eps_io
    44 ///\file
    45 ///\brief A well configurable tool for visualizing graphs
    46 
    47 namespace lemon {
    48 
    49   namespace _graph_to_eps_bits {
    50     template<class MT>
    51     class _NegY {
    52     public:
    53       typedef typename MT::Key Key;
    54       typedef typename MT::Value Value;
    55       const MT &map;
    56       int yscale;
    57       _NegY(const MT &m,bool b) : map(m), yscale(1-b*2) {}
    58       Value operator[](Key n) { return Value(map[n].x,map[n].y*yscale);}
    59     };
    60   }
    61   
    62 ///Default traits class of \ref GraphToEps
    63 
    64 ///Default traits class of \ref GraphToEps
    65 ///
    66 ///\c G is the type of the underlying graph.
    67 template<class G>
    68 struct DefaultGraphToEpsTraits
    69 {
    70   typedef G Graph;
    71   typedef typename Graph::Node Node;
    72   typedef typename Graph::NodeIt NodeIt;
    73   typedef typename Graph::Arc Arc;
    74   typedef typename Graph::ArcIt ArcIt;
    75   typedef typename Graph::InArcIt InArcIt;
    76   typedef typename Graph::OutArcIt OutArcIt;
    77   
    78 
    79   const Graph &g;
    80 
    81   std::ostream& os;
    82   
    83   typedef ConstMap<typename Graph::Node,dim2::Point<double> > CoordsMapType;
    84   CoordsMapType _coords;
    85   ConstMap<typename Graph::Node,double > _nodeSizes;
    86   ConstMap<typename Graph::Node,int > _nodeShapes;
    87 
    88   ConstMap<typename Graph::Node,Color > _nodeColors;
    89   ConstMap<typename Graph::Arc,Color > _arcColors;
    90 
    91   ConstMap<typename Graph::Arc,double > _arcWidths;
    92 
    93   double _arcWidthScale;
    94   
    95   double _nodeScale;
    96   double _xBorder, _yBorder;
    97   double _scale;
    98   double _nodeBorderQuotient;
    99   
   100   bool _drawArrows;
   101   double _arrowLength, _arrowWidth;
   102   
   103   bool _showNodes, _showArcs;
   104 
   105   bool _enableParallel;
   106   double _parArcDist;
   107 
   108   bool _showNodeText;
   109   ConstMap<typename Graph::Node,bool > _nodeTexts;  
   110   double _nodeTextSize;
   111 
   112   bool _showNodePsText;
   113   ConstMap<typename Graph::Node,bool > _nodePsTexts;  
   114   char *_nodePsTextsPreamble;
   115   
   116   bool _undirected;
   117 
   118   bool _pleaseRemoveOsStream;
   119 
   120   bool _scaleToA4;
   121 
   122   std::string _title;
   123   std::string _copyright;
   124 
   125   enum NodeTextColorType 
   126     { DIST_COL=0, DIST_BW=1, CUST_COL=2, SAME_COL=3 } _nodeTextColorType;
   127   ConstMap<typename Graph::Node,Color > _nodeTextColors;
   128 
   129   bool _autoNodeScale;
   130   bool _autoArcWidthScale;
   131 
   132   bool _absoluteNodeSizes;
   133   bool _absoluteArcWidths;
   134 
   135   bool _negY;
   136 
   137   bool _preScale;
   138   ///Constructor
   139 
   140   ///Constructor
   141   ///\param _g is a reference to the graph to be printed
   142   ///\param _os is a reference to the output stream.
   143   ///\param _os is a reference to the output stream.
   144   ///\param _pros If it is \c true, then the \c ostream referenced by \c _os
   145   ///will be explicitly deallocated by the destructor.
   146   ///By default it is <tt>std::cout</tt>
   147   DefaultGraphToEpsTraits(const G &_g,std::ostream& _os=std::cout,
   148 			  bool _pros=false) :
   149     g(_g), os(_os),
   150     _coords(dim2::Point<double>(1,1)), _nodeSizes(1), _nodeShapes(0),
   151     _nodeColors(WHITE), _arcColors(BLACK),
   152     _arcWidths(1.0), _arcWidthScale(0.003),
   153     _nodeScale(.01), _xBorder(10), _yBorder(10), _scale(1.0),
   154     _nodeBorderQuotient(.1),
   155     _drawArrows(false), _arrowLength(1), _arrowWidth(0.3),
   156     _showNodes(true), _showArcs(true),
   157     _enableParallel(false), _parArcDist(1),
   158     _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
   159     _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
   160     _undirected(lemon::UndirectedTagIndicator<G>::value),
   161     _pleaseRemoveOsStream(_pros), _scaleToA4(false),
   162     _nodeTextColorType(SAME_COL), _nodeTextColors(BLACK),
   163     _autoNodeScale(false),
   164     _autoArcWidthScale(false),
   165     _absoluteNodeSizes(false),
   166     _absoluteArcWidths(false),
   167     _negY(false),
   168     _preScale(true)
   169   {}
   170 };
   171 
   172 ///Auxiliary class to implement the named parameters of \ref graphToEps()
   173 
   174 ///Auxiliary class to implement the named parameters of \ref graphToEps()
   175 template<class T> class GraphToEps : public T 
   176 {
   177   // Can't believe it is required by the C++ standard
   178   using T::g;
   179   using T::os;
   180 
   181   using T::_coords;
   182   using T::_nodeSizes;
   183   using T::_nodeShapes;
   184   using T::_nodeColors;
   185   using T::_arcColors;
   186   using T::_arcWidths;
   187 
   188   using T::_arcWidthScale;
   189   using T::_nodeScale;
   190   using T::_xBorder;
   191   using T::_yBorder;
   192   using T::_scale;
   193   using T::_nodeBorderQuotient;
   194   
   195   using T::_drawArrows;
   196   using T::_arrowLength;
   197   using T::_arrowWidth;
   198   
   199   using T::_showNodes;
   200   using T::_showArcs;
   201 
   202   using T::_enableParallel;
   203   using T::_parArcDist;
   204 
   205   using T::_showNodeText;
   206   using T::_nodeTexts;  
   207   using T::_nodeTextSize;
   208 
   209   using T::_showNodePsText;
   210   using T::_nodePsTexts;  
   211   using T::_nodePsTextsPreamble;
   212   
   213   using T::_undirected;
   214 
   215   using T::_pleaseRemoveOsStream;
   216 
   217   using T::_scaleToA4;
   218 
   219   using T::_title;
   220   using T::_copyright;
   221 
   222   using T::NodeTextColorType;
   223   using T::CUST_COL;
   224   using T::DIST_COL;
   225   using T::DIST_BW;
   226   using T::_nodeTextColorType;
   227   using T::_nodeTextColors;
   228 
   229   using T::_autoNodeScale;
   230   using T::_autoArcWidthScale;
   231 
   232   using T::_absoluteNodeSizes;
   233   using T::_absoluteArcWidths;
   234 
   235 
   236   using T::_negY;
   237   using T::_preScale;
   238 
   239   // dradnats ++C eht yb deriuqer si ti eveileb t'naC
   240 
   241   typedef typename T::Graph Graph;
   242   typedef typename Graph::Node Node;
   243   typedef typename Graph::NodeIt NodeIt;
   244   typedef typename Graph::Arc Arc;
   245   typedef typename Graph::ArcIt ArcIt;
   246   typedef typename Graph::InArcIt InArcIt;
   247   typedef typename Graph::OutArcIt OutArcIt;
   248 
   249   static const int INTERPOL_PREC;
   250   static const double A4HEIGHT;
   251   static const double A4WIDTH;
   252   static const double A4BORDER;
   253 
   254   bool dontPrint;
   255 
   256 public:
   257   ///Node shapes
   258 
   259   ///Node shapes
   260   ///
   261   enum NodeShapes { 
   262     /// = 0
   263     ///\image html nodeshape_0.png
   264     ///\image latex nodeshape_0.eps "CIRCLE shape (0)" width=2cm
   265     CIRCLE=0, 
   266     /// = 1
   267     ///\image html nodeshape_1.png
   268     ///\image latex nodeshape_1.eps "SQUARE shape (1)" width=2cm
   269     ///
   270     SQUARE=1, 
   271     /// = 2
   272     ///\image html nodeshape_2.png
   273     ///\image latex nodeshape_2.eps "DIAMOND shape (2)" width=2cm
   274     ///
   275     DIAMOND=2,
   276     /// = 3
   277     ///\image html nodeshape_3.png
   278     ///\image latex nodeshape_2.eps "MALE shape (4)" width=2cm
   279     ///
   280     MALE=3,
   281     /// = 4
   282     ///\image html nodeshape_4.png
   283     ///\image latex nodeshape_2.eps "FEMALE shape (4)" width=2cm
   284     ///
   285     FEMALE=4
   286   };
   287 
   288 private:
   289   class arcLess {
   290     const Graph &g;
   291   public:
   292     arcLess(const Graph &_g) : g(_g) {}
   293     bool operator()(Arc a,Arc b) const 
   294     {
   295       Node ai=std::min(g.source(a),g.target(a));
   296       Node aa=std::max(g.source(a),g.target(a));
   297       Node bi=std::min(g.source(b),g.target(b));
   298       Node ba=std::max(g.source(b),g.target(b));
   299       return ai<bi ||
   300 	(ai==bi && (aa < ba || 
   301 		    (aa==ba && ai==g.source(a) && bi==g.target(b))));
   302     }
   303   };
   304   bool isParallel(Arc e,Arc f) const
   305   {
   306     return (g.source(e)==g.source(f)&&
   307 	    g.target(e)==g.target(f)) ||
   308       (g.source(e)==g.target(f)&&
   309        g.target(e)==g.source(f));
   310   }
   311   template<class TT>
   312   static std::string psOut(const dim2::Point<TT> &p) 
   313     {
   314       std::ostringstream os;	
   315       os << p.x << ' ' << p.y;
   316       return os.str();
   317     }
   318   static std::string psOut(const Color &c) 
   319     {
   320       std::ostringstream os;	
   321       os << c.red() << ' ' << c.green() << ' ' << c.blue();
   322       return os.str();
   323     }
   324   
   325 public:
   326   GraphToEps(const T &t) : T(t), dontPrint(false) {};
   327   
   328   template<class X> struct CoordsTraits : public T {
   329   typedef X CoordsMapType;
   330     const X &_coords;
   331     CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}
   332   };
   333   ///Sets the map of the node coordinates
   334 
   335   ///Sets the map of the node coordinates.
   336   ///\param x must be a node map with dim2::Point<double> or
   337   ///\ref dim2::Point "dim2::Point<int>" values. 
   338   template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
   339     dontPrint=true;
   340     return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));
   341   }
   342   template<class X> struct NodeSizesTraits : public T {
   343     const X &_nodeSizes;
   344     NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}
   345   };
   346   ///Sets the map of the node sizes
   347 
   348   ///Sets the map of the node sizes
   349   ///\param x must be a node map with \c double (or convertible) values. 
   350   template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)
   351   {
   352     dontPrint=true;
   353     return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));
   354   }
   355   template<class X> struct NodeShapesTraits : public T {
   356     const X &_nodeShapes;
   357     NodeShapesTraits(const T &t,const X &x) : T(t), _nodeShapes(x) {}
   358   };
   359   ///Sets the map of the node shapes
   360 
   361   ///Sets the map of the node shapes.
   362   ///The available shape values
   363   ///can be found in \ref NodeShapes "enum NodeShapes".
   364   ///\param x must be a node map with \c int (or convertible) values. 
   365   ///\sa NodeShapes
   366   template<class X> GraphToEps<NodeShapesTraits<X> > nodeShapes(const X &x)
   367   {
   368     dontPrint=true;
   369     return GraphToEps<NodeShapesTraits<X> >(NodeShapesTraits<X>(*this,x));
   370   }
   371   template<class X> struct NodeTextsTraits : public T {
   372     const X &_nodeTexts;
   373     NodeTextsTraits(const T &t,const X &x) : T(t), _nodeTexts(x) {}
   374   };
   375   ///Sets the text printed on the nodes
   376 
   377   ///Sets the text printed on the nodes
   378   ///\param x must be a node map with type that can be pushed to a standard
   379   ///ostream. 
   380   template<class X> GraphToEps<NodeTextsTraits<X> > nodeTexts(const X &x)
   381   {
   382     dontPrint=true;
   383     _showNodeText=true;
   384     return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
   385   }
   386   template<class X> struct NodePsTextsTraits : public T {
   387     const X &_nodePsTexts;
   388     NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
   389   };
   390   ///Inserts a PostScript block to the nodes
   391 
   392   ///With this command it is possible to insert a verbatim PostScript
   393   ///block to the nodes.
   394   ///The PS current point will be moved to the centre of the node before
   395   ///the PostScript block inserted.
   396   ///
   397   ///Before and after the block a newline character is inserted so you
   398   ///don't have to bother with the separators.
   399   ///
   400   ///\param x must be a node map with type that can be pushed to a standard
   401   ///ostream.
   402   ///
   403   ///\sa nodePsTextsPreamble()
   404   template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
   405   {
   406     dontPrint=true;
   407     _showNodePsText=true;
   408     return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
   409   }
   410   template<class X> struct ArcWidthsTraits : public T {
   411     const X &_arcWidths;
   412     ArcWidthsTraits(const T &t,const X &x) : T(t), _arcWidths(x) {}
   413   };
   414   ///Sets the map of the arc widths
   415 
   416   ///Sets the map of the arc widths
   417   ///\param x must be a arc map with \c double (or convertible) values. 
   418   template<class X> GraphToEps<ArcWidthsTraits<X> > arcWidths(const X &x)
   419   {
   420     dontPrint=true;
   421     return GraphToEps<ArcWidthsTraits<X> >(ArcWidthsTraits<X>(*this,x));
   422   }
   423 
   424   template<class X> struct NodeColorsTraits : public T {
   425     const X &_nodeColors;
   426     NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}
   427   };
   428   ///Sets the map of the node colors
   429 
   430   ///Sets the map of the node colors
   431   ///\param x must be a node map with \ref Color values.
   432   ///
   433   ///\sa Palette
   434   template<class X> GraphToEps<NodeColorsTraits<X> >
   435   nodeColors(const X &x)
   436   {
   437     dontPrint=true;
   438     return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));
   439   }
   440   template<class X> struct NodeTextColorsTraits : public T {
   441     const X &_nodeTextColors;
   442     NodeTextColorsTraits(const T &t,const X &x) : T(t), _nodeTextColors(x) {}
   443   };
   444   ///Sets the map of the node text colors
   445 
   446   ///Sets the map of the node text colors
   447   ///\param x must be a node map with \ref Color values. 
   448   ///
   449   ///\sa Palette
   450   template<class X> GraphToEps<NodeTextColorsTraits<X> >
   451   nodeTextColors(const X &x)
   452   {
   453     dontPrint=true;
   454     _nodeTextColorType=CUST_COL;
   455     return GraphToEps<NodeTextColorsTraits<X> >
   456       (NodeTextColorsTraits<X>(*this,x));
   457   }
   458   template<class X> struct ArcColorsTraits : public T {
   459     const X &_arcColors;
   460     ArcColorsTraits(const T &t,const X &x) : T(t), _arcColors(x) {}
   461   };
   462   ///Sets the map of the arc colors
   463 
   464   ///Sets the map of the arc colors
   465   ///\param x must be a arc map with \ref Color values. 
   466   ///
   467   ///\sa Palette
   468   template<class X> GraphToEps<ArcColorsTraits<X> >
   469   arcColors(const X &x)
   470   {
   471     dontPrint=true;
   472     return GraphToEps<ArcColorsTraits<X> >(ArcColorsTraits<X>(*this,x));
   473   }
   474   ///Sets a global scale factor for node sizes
   475 
   476   ///Sets a global scale factor for node sizes.
   477   /// 
   478   /// If nodeSizes() is not given, this function simply sets the node
   479   /// sizes to \c d.  If nodeSizes() is given, but
   480   /// autoNodeScale() is not, then the node size given by
   481   /// nodeSizes() will be multiplied by the value \c d.
   482   /// If both nodeSizes() and autoNodeScale() are used, then the
   483   /// node sizes will be scaled in such a way that the greatest size will be
   484   /// equal to \c d.
   485   /// \sa nodeSizes()
   486   /// \sa autoNodeScale()
   487   GraphToEps<T> &nodeScale(double d=.01) {_nodeScale=d;return *this;}
   488   ///Turns on/off the automatic node width scaling.
   489 
   490   ///Turns on/off the automatic node width scaling.
   491   ///
   492   ///\sa nodeScale()
   493   ///
   494   GraphToEps<T> &autoNodeScale(bool b=true) {
   495     _autoNodeScale=b;return *this;
   496   }
   497 
   498   ///Turns on/off the absolutematic node width scaling.
   499 
   500   ///Turns on/off the absolutematic node width scaling.
   501   ///
   502   ///\sa nodeScale()
   503   ///
   504   GraphToEps<T> &absoluteNodeSizes(bool b=true) {
   505     _absoluteNodeSizes=b;return *this;
   506   }
   507 
   508   ///Negates the Y coordinates.
   509 
   510   ///Negates the Y coordinates.
   511   ///
   512   GraphToEps<T> &negateY(bool b=true) {
   513     _negY=b;return *this;
   514   }
   515 
   516   ///Turn on/off pre-scaling
   517 
   518   ///By default graphToEps() rescales the whole image in order to avoid
   519   ///very big or very small bounding boxes.
   520   ///
   521   ///This (p)rescaling can be turned off with this function.
   522   ///
   523   GraphToEps<T> &preScale(bool b=true) {
   524     _preScale=b;return *this;
   525   }
   526 
   527   ///Sets a global scale factor for arc widths
   528 
   529   /// Sets a global scale factor for arc widths.
   530   ///
   531   /// If arcWidths() is not given, this function simply sets the arc
   532   /// widths to \c d.  If arcWidths() is given, but
   533   /// autoArcWidthScale() is not, then the arc withs given by
   534   /// arcWidths() will be multiplied by the value \c d.
   535   /// If both arcWidths() and autoArcWidthScale() are used, then the
   536   /// arc withs will be scaled in such a way that the greatest width will be
   537   /// equal to \c d.
   538   GraphToEps<T> &arcWidthScale(double d=.003) {_arcWidthScale=d;return *this;}
   539   ///Turns on/off the automatic arc width scaling.
   540 
   541   ///Turns on/off the automatic arc width scaling.
   542   ///
   543   ///\sa arcWidthScale()
   544   ///
   545   GraphToEps<T> &autoArcWidthScale(bool b=true) {
   546     _autoArcWidthScale=b;return *this;
   547   }
   548   ///Turns on/off the absolutematic arc width scaling.
   549 
   550   ///Turns on/off the absolutematic arc width scaling.
   551   ///
   552   ///\sa arcWidthScale()
   553   ///
   554   GraphToEps<T> &absoluteArcWidths(bool b=true) {
   555     _absoluteArcWidths=b;return *this;
   556   }
   557   ///Sets a global scale factor for the whole picture
   558 
   559   ///Sets a global scale factor for the whole picture
   560   ///
   561 
   562   GraphToEps<T> &scale(double d) {_scale=d;return *this;}
   563   ///Sets the width of the border around the picture
   564 
   565   ///Sets the width of the border around the picture
   566   ///
   567   GraphToEps<T> &border(double b=10) {_xBorder=_yBorder=b;return *this;}
   568   ///Sets the width of the border around the picture
   569 
   570   ///Sets the width of the border around the picture
   571   ///
   572   GraphToEps<T> &border(double x, double y) {
   573     _xBorder=x;_yBorder=y;return *this;
   574   }
   575   ///Sets whether to draw arrows
   576 
   577   ///Sets whether to draw arrows
   578   ///
   579   GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}
   580   ///Sets the length of the arrowheads
   581 
   582   ///Sets the length of the arrowheads
   583   ///
   584   GraphToEps<T> &arrowLength(double d=1.0) {_arrowLength*=d;return *this;}
   585   ///Sets the width of the arrowheads
   586 
   587   ///Sets the width of the arrowheads
   588   ///
   589   GraphToEps<T> &arrowWidth(double d=.3) {_arrowWidth*=d;return *this;}
   590   
   591   ///Scales the drawing to fit to A4 page
   592 
   593   ///Scales the drawing to fit to A4 page
   594   ///
   595   GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
   596   
   597   ///Enables parallel arcs
   598 
   599   ///Enables parallel arcs
   600   GraphToEps<T> &enableParallel(bool b=true) {_enableParallel=b;return *this;}
   601   
   602   ///Sets the distance 
   603   
   604   ///Sets the distance 
   605   ///
   606   GraphToEps<T> &parArcDist(double d) {_parArcDist*=d;return *this;}
   607   
   608   ///Hides the arcs
   609   
   610   ///Hides the arcs
   611   ///
   612   GraphToEps<T> &hideArcs(bool b=true) {_showArcs=!b;return *this;}
   613   ///Hides the nodes
   614   
   615   ///Hides the nodes
   616   ///
   617   GraphToEps<T> &hideNodes(bool b=true) {_showNodes=!b;return *this;}
   618   
   619   ///Sets the size of the node texts
   620   
   621   ///Sets the size of the node texts
   622   ///
   623   GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
   624 
   625   ///Sets the color of the node texts to be different from the node color
   626 
   627   ///Sets the color of the node texts to be as different from the node color
   628   ///as it is possible
   629   ///
   630   GraphToEps<T> &distantColorNodeTexts()
   631   {_nodeTextColorType=DIST_COL;return *this;}
   632   ///Sets the color of the node texts to be black or white and always visible.
   633 
   634   ///Sets the color of the node texts to be black or white according to
   635   ///which is more 
   636   ///different from the node color
   637   ///
   638   GraphToEps<T> &distantBWNodeTexts()
   639   {_nodeTextColorType=DIST_BW;return *this;}
   640 
   641   ///Gives a preamble block for node Postscript block.
   642   
   643   ///Gives a preamble block for node Postscript block.
   644   ///
   645   ///\sa nodePsTexts()
   646   GraphToEps<T> & nodePsTextsPreamble(const char *str) {
   647     _nodePsTextsPreamble=str ;return *this;
   648   }
   649   ///Sets whether the the graph is undirected
   650 
   651   ///Sets whether the the graph is undirected.
   652   ///
   653   ///This setting is the default for undirected graphs.
   654   ///
   655   ///\sa directed()
   656    GraphToEps<T> &undirected(bool b=true) {_undirected=b;return *this;}
   657 
   658   ///Sets whether the the graph is directed
   659 
   660   ///Sets whether the the graph is directed.
   661   ///Use it to show the edges as a pair of directed ones.
   662   ///
   663   ///This setting is the default for digraphs.
   664   ///
   665   ///\sa undirected()
   666   GraphToEps<T> &directed(bool b=true) {_undirected=!b;return *this;}
   667   
   668   ///Sets the title.
   669 
   670   ///Sets the title of the generated image,
   671   ///namely it inserts a <tt>%%Title:</tt> DSC field to the header of
   672   ///the EPS file.
   673   GraphToEps<T> &title(const std::string &t) {_title=t;return *this;}
   674   ///Sets the copyright statement.
   675 
   676   ///Sets the copyright statement of the generated image,
   677   ///namely it inserts a <tt>%%Copyright:</tt> DSC field to the header of
   678   ///the EPS file.
   679   GraphToEps<T> &copyright(const std::string &t) {_copyright=t;return *this;}
   680 
   681 protected:
   682   bool isInsideNode(dim2::Point<double> p, double r,int t) 
   683   {
   684     switch(t) {
   685     case CIRCLE:
   686     case MALE:
   687     case FEMALE:
   688       return p.normSquare()<=r*r;
   689     case SQUARE:
   690       return p.x<=r&&p.x>=-r&&p.y<=r&&p.y>=-r;
   691     case DIAMOND:
   692       return p.x+p.y<=r && p.x-p.y<=r && -p.x+p.y<=r && -p.x-p.y<=r;
   693     }
   694     return false;
   695   }
   696 
   697 public:
   698   ~GraphToEps() { }
   699   
   700   ///Draws the graph.
   701 
   702   ///Like other functions using
   703   ///\ref named-templ-func-param "named template parameters",
   704   ///this function calls the algorithm itself, i.e. in this case
   705   ///it draws the graph.
   706   void run() {
   707     //\todo better 'epsilon' would be nice here.
   708     const double EPSILON=1e-9;
   709     if(dontPrint) return;
   710     
   711     _graph_to_eps_bits::_NegY<typename T::CoordsMapType>
   712       mycoords(_coords,_negY);
   713 
   714     os << "%!PS-Adobe-2.0 EPSF-2.0\n";
   715     if(_title.size()>0) os << "%%Title: " << _title << '\n';
   716      if(_copyright.size()>0) os << "%%Copyright: " << _copyright << '\n';
   717 //        << "%%Copyright: XXXX\n"
   718     os << "%%Creator: LEMON, graphToEps()\n";
   719 
   720     {    
   721 #ifndef WIN32 
   722       timeval tv;
   723       gettimeofday(&tv, 0);
   724 
   725       char cbuf[26];
   726       ctime_r(&tv.tv_sec,cbuf);
   727       os << "%%CreationDate: " << cbuf;
   728 #else
   729       SYSTEMTIME time;
   730       char buf1[11], buf2[9], buf3[5];
   731       
   732       GetSystemTime(&time);
   733       if (GetDateFormat(LOCALE_USER_DEFAULT, 0, &time, 
   734 			"ddd MMM dd", buf1, 11) &&
   735 	  GetTimeFormat(LOCALE_USER_DEFAULT, 0, &time, 
   736 			"HH':'mm':'ss", buf2, 9) &&
   737 	  GetDateFormat(LOCALE_USER_DEFAULT, 0, &time, 
   738 				"yyyy", buf3, 5)) {
   739 	os << "%%CreationDate: " << buf1 << ' ' 
   740 	   << buf2 << ' ' << buf3 << std::endl;
   741       }	  
   742 #endif
   743     }
   744 
   745     if (_autoArcWidthScale) {
   746       double max_w=0;
   747       for(ArcIt e(g);e!=INVALID;++e)
   748 	max_w=std::max(double(_arcWidths[e]),max_w);
   749       ///\todo better 'epsilon' would be nice here.
   750       if(max_w>EPSILON) {
   751 	_arcWidthScale/=max_w;
   752       }
   753     }
   754 
   755     if (_autoNodeScale) {
   756       double max_s=0;
   757       for(NodeIt n(g);n!=INVALID;++n)
   758 	max_s=std::max(double(_nodeSizes[n]),max_s);
   759       ///\todo better 'epsilon' would be nice here.
   760       if(max_s>EPSILON) {
   761 	_nodeScale/=max_s;
   762       }
   763     }
   764 
   765     double diag_len = 1;
   766     if(!(_absoluteNodeSizes&&_absoluteArcWidths)) {
   767       dim2::BoundingBox<double> bb;
   768       for(NodeIt n(g);n!=INVALID;++n) bb.add(mycoords[n]);
   769       if (bb.empty()) {
   770 	bb = dim2::BoundingBox<double>(dim2::Point<double>(0,0));
   771       }
   772       diag_len = std::sqrt((bb.bottomLeft()-bb.topRight()).normSquare());
   773       if(diag_len<EPSILON) diag_len = 1;
   774       if(!_absoluteNodeSizes) _nodeScale*=diag_len;
   775       if(!_absoluteArcWidths) _arcWidthScale*=diag_len;
   776     }
   777     
   778     dim2::BoundingBox<double> bb;
   779     for(NodeIt n(g);n!=INVALID;++n) {
   780       double ns=_nodeSizes[n]*_nodeScale;
   781       dim2::Point<double> p(ns,ns);
   782       switch(_nodeShapes[n]) {
   783       case CIRCLE:
   784       case SQUARE:
   785       case DIAMOND:
   786 	bb.add(p+mycoords[n]);
   787 	bb.add(-p+mycoords[n]);
   788 	break;
   789       case MALE:
   790 	bb.add(-p+mycoords[n]);
   791 	bb.add(dim2::Point<double>(1.5*ns,1.5*std::sqrt(3.0)*ns)+mycoords[n]);
   792 	break;
   793       case FEMALE:
   794 	bb.add(p+mycoords[n]);
   795 	bb.add(dim2::Point<double>(-ns,-3.01*ns)+mycoords[n]);
   796 	break;
   797       }
   798     }
   799     if (bb.empty()) {
   800       bb = dim2::BoundingBox<double>(dim2::Point<double>(0,0));
   801     }
   802     
   803     if(_scaleToA4)
   804       os <<"%%BoundingBox: 0 0 596 842\n%%DocumentPaperSizes: a4\n";
   805     else {
   806       if(_preScale) {
   807 	//Rescale so that BoundingBox won't be neither to big nor too small.
   808 	while(bb.height()*_scale>1000||bb.width()*_scale>1000) _scale/=10;
   809 	while(bb.height()*_scale<100||bb.width()*_scale<100) _scale*=10;
   810       }
   811       
   812       os << "%%BoundingBox: "
   813 	 << int(floor(bb.left()   * _scale - _xBorder)) << ' '
   814 	 << int(floor(bb.bottom() * _scale - _yBorder)) << ' '
   815 	 << int(ceil(bb.right()  * _scale + _xBorder)) << ' '
   816 	 << int(ceil(bb.top()    * _scale + _yBorder)) << '\n';
   817     }
   818     
   819     os << "%%EndComments\n";
   820     
   821     //x1 y1 x2 y2 x3 y3 cr cg cb w
   822     os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
   823        << "      4 2 roll 1 index 1 index curveto stroke } bind def\n";
   824     os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke } bind def\n";
   825     //x y r
   826     os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath } bind def\n";
   827     //x y r
   828     os << "/sq { newpath 2 index 1 index add 2 index 2 index add moveto\n"
   829        << "      2 index 1 index sub 2 index 2 index add lineto\n"
   830        << "      2 index 1 index sub 2 index 2 index sub lineto\n"
   831        << "      2 index 1 index add 2 index 2 index sub lineto\n"
   832        << "      closepath pop pop pop} bind def\n";
   833     //x y r
   834     os << "/di { newpath 2 index 1 index add 2 index moveto\n"
   835        << "      2 index             2 index 2 index add lineto\n"
   836        << "      2 index 1 index sub 2 index             lineto\n"
   837        << "      2 index             2 index 2 index sub lineto\n"
   838        << "      closepath pop pop pop} bind def\n";
   839     // x y r cr cg cb
   840     os << "/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill\n"
   841        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   842        << "   } bind def\n";
   843     os << "/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill\n"
   844        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div sq fill\n"
   845        << "   } bind def\n";
   846     os << "/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill\n"
   847        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div di fill\n"
   848        << "   } bind def\n";
   849     os << "/nfemale { 0 0 0 setrgbcolor 3 index "
   850        << _nodeBorderQuotient/(1+_nodeBorderQuotient)
   851        << " 1.5 mul mul setlinewidth\n"
   852        << "  newpath 5 index 5 index moveto "
   853        << "5 index 5 index 5 index 3.01 mul sub\n"
   854        << "  lineto 5 index 4 index .7 mul sub 5 index 5 index 2.2 mul sub moveto\n"
   855        << "  5 index 4 index .7 mul add 5 index 5 index 2.2 mul sub lineto stroke\n"
   856        << "  5 index 5 index 5 index c fill\n"
   857        << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   858        << "  } bind def\n";
   859     os << "/nmale {\n"
   860        << "  0 0 0 setrgbcolor 3 index "
   861        << _nodeBorderQuotient/(1+_nodeBorderQuotient)
   862        <<" 1.5 mul mul setlinewidth\n"
   863        << "  newpath 5 index 5 index moveto\n"
   864        << "  5 index 4 index 1 mul 1.5 mul add\n"
   865        << "  5 index 5 index 3 sqrt 1.5 mul mul add\n"
   866        << "  1 index 1 index lineto\n"
   867        << "  1 index 1 index 7 index sub moveto\n"
   868        << "  1 index 1 index lineto\n"
   869        << "  exch 5 index 3 sqrt .5 mul mul sub exch 5 index .5 mul sub lineto\n"
   870        << "  stroke\n"
   871        << "  5 index 5 index 5 index c fill\n"
   872        << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   873        << "  } bind def\n";
   874     
   875 
   876     os << "/arrl " << _arrowLength << " def\n";
   877     os << "/arrw " << _arrowWidth << " def\n";
   878     // l dx_norm dy_norm
   879     os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";
   880     //len w dx_norm dy_norm x1 y1 cr cg cb
   881     os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx exch def\n"
   882        << "       /w exch def /len exch def\n"
   883       //	 << "       0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"
   884        << "       newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"
   885        << "       len w sub arrl sub dx dy lrl\n"
   886        << "       arrw dy dx neg lrl\n"
   887        << "       dx arrl w add mul dy w 2 div arrw add mul sub\n"
   888        << "       dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"
   889        << "       dx arrl w add mul neg dy w 2 div arrw add mul sub\n"
   890        << "       dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"
   891        << "       arrw dy dx neg lrl\n"
   892        << "       len w sub arrl sub neg dx dy lrl\n"
   893        << "       closepath fill } bind def\n";
   894     os << "/cshow { 2 index 2 index moveto dup stringwidth pop\n"
   895        << "         neg 2 div fosi .35 mul neg rmoveto show pop pop} def\n";
   896 
   897     os << "\ngsave\n";
   898     if(_scaleToA4)
   899       if(bb.height()>bb.width()) {
   900 	double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.height(),
   901 		  (A4WIDTH-2*A4BORDER)/bb.width());
   902 	os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
   903 	   << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER
   904 	   << " translate\n"
   905 	   << sc << " dup scale\n"
   906 	   << -bb.left() << ' ' << -bb.bottom() << " translate\n";
   907       }
   908       else {
   909 	//\todo Verify centering
   910 	double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.width(),
   911 		  (A4WIDTH-2*A4BORDER)/bb.height());
   912 	os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
   913 	   << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER 
   914 	   << " translate\n"
   915 	   << sc << " dup scale\n90 rotate\n"
   916 	   << -bb.left() << ' ' << -bb.top() << " translate\n";	
   917 	}
   918     else if(_scale!=1.0) os << _scale << " dup scale\n";
   919     
   920     if(_showArcs) {
   921       os << "%Arcs:\ngsave\n";      
   922       if(_enableParallel) {
   923 	std::vector<Arc> el;
   924 	for(ArcIt e(g);e!=INVALID;++e)
   925 	  if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
   926 	     &&g.source(e)!=g.target(e))
   927 	    el.push_back(e);
   928 	std::sort(el.begin(),el.end(),arcLess(g));
   929 	
   930 	typename std::vector<Arc>::iterator j;
   931 	for(typename std::vector<Arc>::iterator i=el.begin();i!=el.end();i=j) {
   932 	  for(j=i+1;j!=el.end()&&isParallel(*i,*j);++j) ;
   933 
   934 	  double sw=0;
   935 	  for(typename std::vector<Arc>::iterator e=i;e!=j;++e)
   936 	    sw+=_arcWidths[*e]*_arcWidthScale+_parArcDist;
   937 	  sw-=_parArcDist;
   938 	  sw/=-2.0;
   939 	  dim2::Point<double>
   940 	    dvec(mycoords[g.target(*i)]-mycoords[g.source(*i)]);
   941 	  double l=std::sqrt(dvec.normSquare()); 
   942 	  //\todo better 'epsilon' would be nice here.
   943 	  dim2::Point<double> d(dvec/std::max(l,EPSILON));
   944  	  dim2::Point<double> m;
   945 // 	  m=dim2::Point<double>(mycoords[g.target(*i)]+mycoords[g.source(*i)])/2.0;
   946 
   947 //  	  m=dim2::Point<double>(mycoords[g.source(*i)])+
   948 // 	    dvec*(double(_nodeSizes[g.source(*i)])/
   949 // 	       (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
   950 
   951  	  m=dim2::Point<double>(mycoords[g.source(*i)])+
   952 	    d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
   953 
   954 	  for(typename std::vector<Arc>::iterator e=i;e!=j;++e) {
   955 	    sw+=_arcWidths[*e]*_arcWidthScale/2.0;
   956 	    dim2::Point<double> mm=m+rot90(d)*sw/.75;
   957 	    if(_drawArrows) {
   958 	      int node_shape;
   959 	      dim2::Point<double> s=mycoords[g.source(*e)];
   960 	      dim2::Point<double> t=mycoords[g.target(*e)];
   961 	      double rn=_nodeSizes[g.target(*e)]*_nodeScale;
   962 	      node_shape=_nodeShapes[g.target(*e)];
   963 	      dim2::Bezier3 bez(s,mm,mm,t);
   964 	      double t1=0,t2=1;
   965 	      for(int ii=0;ii<INTERPOL_PREC;++ii)
   966 		if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t2=(t1+t2)/2;
   967 		else t1=(t1+t2)/2;
   968 	      dim2::Point<double> apoint=bez((t1+t2)/2);
   969 	      rn = _arrowLength+_arcWidths[*e]*_arcWidthScale;
   970 	      rn*=rn;
   971 	      t2=(t1+t2)/2;t1=0;
   972 	      for(int ii=0;ii<INTERPOL_PREC;++ii)
   973 		if((bez((t1+t2)/2)-apoint).normSquare()>rn) t1=(t1+t2)/2;
   974 		else t2=(t1+t2)/2;
   975 	      dim2::Point<double> linend=bez((t1+t2)/2);	      
   976 	      bez=bez.before((t1+t2)/2);
   977 // 	      rn=_nodeSizes[g.source(*e)]*_nodeScale;
   978 // 	      node_shape=_nodeShapes[g.source(*e)];
   979 // 	      t1=0;t2=1;
   980 // 	      for(int i=0;i<INTERPOL_PREC;++i)
   981 // 		if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t1=(t1+t2)/2;
   982 // 		else t2=(t1+t2)/2;
   983 // 	      bez=bez.after((t1+t2)/2);
   984 	      os << _arcWidths[*e]*_arcWidthScale << " setlinewidth "
   985 		 << _arcColors[*e].red() << ' '
   986 		 << _arcColors[*e].green() << ' '
   987 		 << _arcColors[*e].blue() << " setrgbcolor newpath\n"
   988 		 << bez.p1.x << ' ' <<  bez.p1.y << " moveto\n"
   989 		 << bez.p2.x << ' ' << bez.p2.y << ' '
   990 		 << bez.p3.x << ' ' << bez.p3.y << ' '
   991 		 << bez.p4.x << ' ' << bez.p4.y << " curveto stroke\n";
   992 	      dim2::Point<double> dd(rot90(linend-apoint));
   993 	      dd*=(.5*_arcWidths[*e]*_arcWidthScale+_arrowWidth)/
   994 		std::sqrt(dd.normSquare());
   995 	      os << "newpath " << psOut(apoint) << " moveto "
   996 		 << psOut(linend+dd) << " lineto "
   997 		 << psOut(linend-dd) << " lineto closepath fill\n";
   998 	    }
   999 	    else {
  1000 	      os << mycoords[g.source(*e)].x << ' '
  1001 		 << mycoords[g.source(*e)].y << ' '
  1002 		 << mm.x << ' ' << mm.y << ' '
  1003 		 << mycoords[g.target(*e)].x << ' '
  1004 		 << mycoords[g.target(*e)].y << ' '
  1005 		 << _arcColors[*e].red() << ' '
  1006 		 << _arcColors[*e].green() << ' '
  1007 		 << _arcColors[*e].blue() << ' '
  1008 		 << _arcWidths[*e]*_arcWidthScale << " lb\n";
  1009 	    }
  1010 	    sw+=_arcWidths[*e]*_arcWidthScale/2.0+_parArcDist;
  1011 	  }
  1012 	}
  1013       }
  1014       else for(ArcIt e(g);e!=INVALID;++e)
  1015 	if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
  1016 	   &&g.source(e)!=g.target(e))
  1017 	  if(_drawArrows) {
  1018 	    dim2::Point<double> d(mycoords[g.target(e)]-mycoords[g.source(e)]);
  1019 	    double rn=_nodeSizes[g.target(e)]*_nodeScale;
  1020 	    int node_shape=_nodeShapes[g.target(e)];
  1021 	    double t1=0,t2=1;
  1022 	    for(int i=0;i<INTERPOL_PREC;++i)
  1023 	      if(isInsideNode((-(t1+t2)/2)*d,rn,node_shape)) t1=(t1+t2)/2;
  1024 	      else t2=(t1+t2)/2;
  1025 	    double l=std::sqrt(d.normSquare());
  1026 	    d/=l;
  1027 	    
  1028 	    os << l*(1-(t1+t2)/2) << ' '
  1029 	       << _arcWidths[e]*_arcWidthScale << ' '
  1030 	       << d.x << ' ' << d.y << ' '
  1031 	       << mycoords[g.source(e)].x << ' '
  1032 	       << mycoords[g.source(e)].y << ' '
  1033 	       << _arcColors[e].red() << ' '
  1034 	       << _arcColors[e].green() << ' '
  1035 	       << _arcColors[e].blue() << " arr\n";
  1036 	  }
  1037 	  else os << mycoords[g.source(e)].x << ' '
  1038 		  << mycoords[g.source(e)].y << ' '
  1039 		  << mycoords[g.target(e)].x << ' '
  1040 		  << mycoords[g.target(e)].y << ' '
  1041 		  << _arcColors[e].red() << ' '
  1042 		  << _arcColors[e].green() << ' '
  1043 		  << _arcColors[e].blue() << ' '
  1044 		  << _arcWidths[e]*_arcWidthScale << " l\n";
  1045       os << "grestore\n";
  1046     }
  1047     if(_showNodes) {
  1048       os << "%Nodes:\ngsave\n";
  1049       for(NodeIt n(g);n!=INVALID;++n) {
  1050 	os << mycoords[n].x << ' ' << mycoords[n].y << ' '
  1051 	   << _nodeSizes[n]*_nodeScale << ' '
  1052 	   << _nodeColors[n].red() << ' '
  1053 	   << _nodeColors[n].green() << ' '
  1054 	   << _nodeColors[n].blue() << ' ';
  1055 	switch(_nodeShapes[n]) {
  1056 	case CIRCLE:
  1057 	  os<< "nc";break;
  1058 	case SQUARE:
  1059 	  os<< "nsq";break;
  1060 	case DIAMOND:
  1061 	  os<< "ndi";break;
  1062 	case MALE:
  1063 	  os<< "nmale";break;
  1064 	case FEMALE:
  1065 	  os<< "nfemale";break;
  1066 	}
  1067 	os<<'\n';
  1068       }
  1069       os << "grestore\n";
  1070     }
  1071     if(_showNodeText) {
  1072       os << "%Node texts:\ngsave\n";
  1073       os << "/fosi " << _nodeTextSize << " def\n";
  1074       os << "(Helvetica) findfont fosi scalefont setfont\n";
  1075       for(NodeIt n(g);n!=INVALID;++n) {
  1076 	switch(_nodeTextColorType) {
  1077 	case DIST_COL:
  1078 	  os << psOut(distantColor(_nodeColors[n])) << " setrgbcolor\n";
  1079 	  break;
  1080 	case DIST_BW:
  1081 	  os << psOut(distantBW(_nodeColors[n])) << " setrgbcolor\n";
  1082 	  break;
  1083 	case CUST_COL:
  1084 	  os << psOut(distantColor(_nodeTextColors[n])) << " setrgbcolor\n";
  1085 	  break;
  1086 	default:
  1087 	  os << "0 0 0 setrgbcolor\n";
  1088 	}
  1089 	os << mycoords[n].x << ' ' << mycoords[n].y
  1090 	   << " (" << _nodeTexts[n] << ") cshow\n";
  1091       }
  1092       os << "grestore\n";
  1093     }
  1094     if(_showNodePsText) {
  1095       os << "%Node PS blocks:\ngsave\n";
  1096       for(NodeIt n(g);n!=INVALID;++n)
  1097 	os << mycoords[n].x << ' ' << mycoords[n].y
  1098 	   << " moveto\n" << _nodePsTexts[n] << "\n";
  1099       os << "grestore\n";
  1100     }
  1101     
  1102     os << "grestore\nshowpage\n";
  1103 
  1104     //CleanUp:
  1105     if(_pleaseRemoveOsStream) {delete &os;}
  1106   }
  1107 
  1108   ///\name Aliases
  1109   ///These are just some aliases to other parameter setting functions.
  1110 
  1111   ///@{
  1112 
  1113   ///An alias for arcWidths()
  1114 
  1115   ///An alias for arcWidths()
  1116   ///
  1117   template<class X> GraphToEps<ArcWidthsTraits<X> > edgeWidths(const X &x)
  1118   {
  1119     return arcWidths(x);
  1120   }
  1121 
  1122   ///An alias for arcColors()
  1123 
  1124   ///An alias for arcColors()
  1125   ///
  1126   template<class X> GraphToEps<ArcColorsTraits<X> >
  1127   edgeColors(const X &x)
  1128   {
  1129     return arcColors(x);
  1130   }
  1131 
  1132   ///An alias for arcWidthScale()
  1133 
  1134   ///An alias for arcWidthScale()
  1135   ///
  1136   GraphToEps<T> &edgeWidthScale(double d) {return arcWidthScale(d);}
  1137 
  1138   ///An alias for autoArcWidthScale()
  1139 
  1140   ///An alias for autoArcWidthScale()
  1141   ///
  1142   GraphToEps<T> &autoEdgeWidthScale(bool b=true)
  1143   {
  1144     return autoArcWidthScale(b);
  1145   }
  1146   
  1147   ///An alias for absoluteArcWidths()
  1148 
  1149   ///An alias for absoluteArcWidths()
  1150   ///
  1151   GraphToEps<T> &absoluteEdgeWidths(bool b=true)
  1152   {
  1153     return absoluteArcWidths(b);
  1154   }
  1155   
  1156   ///An alias for parArcDist()
  1157 
  1158   ///An alias for parArcDist()
  1159   ///
  1160   GraphToEps<T> &parEdgeDist(double d) {return parArcDist(d);}
  1161   
  1162   ///An alias for hideArcs()
  1163   
  1164   ///An alias for hideArcs()
  1165   ///
  1166   GraphToEps<T> &hideEdges(bool b=true) {return hideArcs(b);}
  1167 
  1168   ///@}
  1169 };
  1170 
  1171 template<class T>
  1172 const int GraphToEps<T>::INTERPOL_PREC = 20;
  1173 template<class T>
  1174 const double GraphToEps<T>::A4HEIGHT = 841.8897637795276;
  1175 template<class T>
  1176 const double GraphToEps<T>::A4WIDTH  = 595.275590551181;
  1177 template<class T>
  1178 const double GraphToEps<T>::A4BORDER = 15;
  1179 
  1180 
  1181 ///Generates an EPS file from a graph
  1182 
  1183 ///\ingroup eps_io
  1184 ///Generates an EPS file from a graph.
  1185 ///\param g is a reference to the graph to be printed
  1186 ///\param os is a reference to the output stream.
  1187 ///By default it is <tt>std::cout</tt>
  1188 ///
  1189 ///This function also has a lot of
  1190 ///\ref named-templ-func-param "named parameters",
  1191 ///they are declared as the members of class \ref GraphToEps. The following
  1192 ///example shows how to use these parameters.
  1193 ///\code
  1194 /// graphToEps(g,os).scale(10).coords(coords)
  1195 ///              .nodeScale(2).nodeSizes(sizes)
  1196 ///              .arcWidthScale(.4).run();
  1197 ///\endcode
  1198 ///\warning Don't forget to put the \ref GraphToEps::run() "run()"
  1199 ///to the end of the parameter list.
  1200 ///\sa GraphToEps
  1201 ///\sa graphToEps(G &g, const char *file_name)
  1202 template<class G>
  1203 GraphToEps<DefaultGraphToEpsTraits<G> > 
  1204 graphToEps(G &g, std::ostream& os=std::cout)
  1205 {
  1206   return 
  1207     GraphToEps<DefaultGraphToEpsTraits<G> >(DefaultGraphToEpsTraits<G>(g,os));
  1208 }
  1209  
  1210 ///Generates an EPS file from a graph
  1211 
  1212 ///\ingroup eps_io
  1213 ///This function does the same as
  1214 ///\ref graphToEps(G &g,std::ostream& os)
  1215 ///but it writes its output into the file \c file_name
  1216 ///instead of a stream.
  1217 ///\sa graphToEps(G &g, std::ostream& os)
  1218 template<class G>
  1219 GraphToEps<DefaultGraphToEpsTraits<G> > 
  1220 graphToEps(G &g,const char *file_name)
  1221 {
  1222   return GraphToEps<DefaultGraphToEpsTraits<G> >
  1223     (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name),true));
  1224 }
  1225 
  1226 ///Generates an EPS file from a graph
  1227 
  1228 ///\ingroup eps_io
  1229 ///This function does the same as
  1230 ///\ref graphToEps(G &g,std::ostream& os)
  1231 ///but it writes its output into the file \c file_name
  1232 ///instead of a stream.
  1233 ///\sa graphToEps(G &g, std::ostream& os)
  1234 template<class G>
  1235 GraphToEps<DefaultGraphToEpsTraits<G> > 
  1236 graphToEps(G &g,const std::string& file_name)
  1237 {
  1238   return GraphToEps<DefaultGraphToEpsTraits<G> >
  1239     (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name.c_str()),true));
  1240 }
  1241 
  1242 } //END OF NAMESPACE LEMON
  1243 
  1244 #endif // LEMON_GRAPH_TO_EPS_H