COIN-OR::LEMON - Graph Library

source: lemon/lemon/graph_to_eps.h @ 313:64f8f7cc6168

Last change on this file since 313:64f8f7cc6168 was 313:64f8f7cc6168, checked in by Peter Kovacs <kpeter@…>, 10 years ago

Fix several doxygen warnings

File size: 38.3 KB
Line 
1/* -*- mode: C++; indent-tabs-mode: nil; -*-
2 *
3 * This file is a part of LEMON, a generic C++ optimization library.
4 *
5 * Copyright (C) 2003-2008
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/core.h>
39#include<lemon/dim2.h>
40#include<lemon/maps.h>
41#include<lemon/color.h>
42#include<lemon/bits/bezier.h>
43#include<lemon/error.h>
44
45
46///\ingroup eps_io
47///\file
48///\brief A well configurable tool for visualizing graphs
49
50namespace lemon {
51
52  namespace _graph_to_eps_bits {
53    template<class MT>
54    class _NegY {
55    public:
56      typedef typename MT::Key Key;
57      typedef typename MT::Value Value;
58      const MT &map;
59      int yscale;
60      _NegY(const MT &m,bool b) : map(m), yscale(1-b*2) {}
61      Value operator[](Key n) { return Value(map[n].x,map[n].y*yscale);}
62    };
63  }
64
65///Default traits class of GraphToEps
66
67///Default traits class of \ref GraphToEps.
68///
69///\c G is the type of the underlying graph.
70template<class G>
71struct DefaultGraphToEpsTraits
72{
73  typedef G Graph;
74  typedef typename Graph::Node Node;
75  typedef typename Graph::NodeIt NodeIt;
76  typedef typename Graph::Arc Arc;
77  typedef typename Graph::ArcIt ArcIt;
78  typedef typename Graph::InArcIt InArcIt;
79  typedef typename Graph::OutArcIt OutArcIt;
80
81
82  const Graph &g;
83
84  std::ostream& os;
85
86  typedef ConstMap<typename Graph::Node,dim2::Point<double> > CoordsMapType;
87  CoordsMapType _coords;
88  ConstMap<typename Graph::Node,double > _nodeSizes;
89  ConstMap<typename Graph::Node,int > _nodeShapes;
90
91  ConstMap<typename Graph::Node,Color > _nodeColors;
92  ConstMap<typename Graph::Arc,Color > _arcColors;
93
94  ConstMap<typename Graph::Arc,double > _arcWidths;
95
96  double _arcWidthScale;
97
98  double _nodeScale;
99  double _xBorder, _yBorder;
100  double _scale;
101  double _nodeBorderQuotient;
102
103  bool _drawArrows;
104  double _arrowLength, _arrowWidth;
105
106  bool _showNodes, _showArcs;
107
108  bool _enableParallel;
109  double _parArcDist;
110
111  bool _showNodeText;
112  ConstMap<typename Graph::Node,bool > _nodeTexts;
113  double _nodeTextSize;
114
115  bool _showNodePsText;
116  ConstMap<typename Graph::Node,bool > _nodePsTexts;
117  char *_nodePsTextsPreamble;
118
119  bool _undirected;
120
121  bool _pleaseRemoveOsStream;
122
123  bool _scaleToA4;
124
125  std::string _title;
126  std::string _copyright;
127
128  enum NodeTextColorType
129    { DIST_COL=0, DIST_BW=1, CUST_COL=2, SAME_COL=3 } _nodeTextColorType;
130  ConstMap<typename Graph::Node,Color > _nodeTextColors;
131
132  bool _autoNodeScale;
133  bool _autoArcWidthScale;
134
135  bool _absoluteNodeSizes;
136  bool _absoluteArcWidths;
137
138  bool _negY;
139
140  bool _preScale;
141  ///Constructor
142
143  ///Constructor
144  ///\param _g  Reference to the graph to be printed.
145  ///\param _os Reference to the output stream.
146  ///\param _os Reference to the output stream.
147  ///By default it is <tt>std::cout</tt>.
148  ///\param _pros If it is \c true, then the \c ostream referenced by \c _os
149  ///will be explicitly deallocated by the destructor.
150  DefaultGraphToEpsTraits(const G &_g,std::ostream& _os=std::cout,
151                          bool _pros=false) :
152    g(_g), os(_os),
153    _coords(dim2::Point<double>(1,1)), _nodeSizes(1), _nodeShapes(0),
154    _nodeColors(WHITE), _arcColors(BLACK),
155    _arcWidths(1.0), _arcWidthScale(0.003),
156    _nodeScale(.01), _xBorder(10), _yBorder(10), _scale(1.0),
157    _nodeBorderQuotient(.1),
158    _drawArrows(false), _arrowLength(1), _arrowWidth(0.3),
159    _showNodes(true), _showArcs(true),
160    _enableParallel(false), _parArcDist(1),
161    _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
162    _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
163    _undirected(lemon::UndirectedTagIndicator<G>::value),
164    _pleaseRemoveOsStream(_pros), _scaleToA4(false),
165    _nodeTextColorType(SAME_COL), _nodeTextColors(BLACK),
166    _autoNodeScale(false),
167    _autoArcWidthScale(false),
168    _absoluteNodeSizes(false),
169    _absoluteArcWidths(false),
170    _negY(false),
171    _preScale(true)
172  {}
173};
174
175///Auxiliary class to implement the named parameters of \ref graphToEps()
176
177///Auxiliary class to implement the named parameters of \ref graphToEps().
178///
179///For detailed examples see the \ref graph_to_eps_demo.cc demo file.
180template<class T> class GraphToEps : public T
181{
182  // Can't believe it is required by the C++ standard
183  using T::g;
184  using T::os;
185
186  using T::_coords;
187  using T::_nodeSizes;
188  using T::_nodeShapes;
189  using T::_nodeColors;
190  using T::_arcColors;
191  using T::_arcWidths;
192
193  using T::_arcWidthScale;
194  using T::_nodeScale;
195  using T::_xBorder;
196  using T::_yBorder;
197  using T::_scale;
198  using T::_nodeBorderQuotient;
199
200  using T::_drawArrows;
201  using T::_arrowLength;
202  using T::_arrowWidth;
203
204  using T::_showNodes;
205  using T::_showArcs;
206
207  using T::_enableParallel;
208  using T::_parArcDist;
209
210  using T::_showNodeText;
211  using T::_nodeTexts;
212  using T::_nodeTextSize;
213
214  using T::_showNodePsText;
215  using T::_nodePsTexts;
216  using T::_nodePsTextsPreamble;
217
218  using T::_undirected;
219
220  using T::_pleaseRemoveOsStream;
221
222  using T::_scaleToA4;
223
224  using T::_title;
225  using T::_copyright;
226
227  using T::NodeTextColorType;
228  using T::CUST_COL;
229  using T::DIST_COL;
230  using T::DIST_BW;
231  using T::_nodeTextColorType;
232  using T::_nodeTextColors;
233
234  using T::_autoNodeScale;
235  using T::_autoArcWidthScale;
236
237  using T::_absoluteNodeSizes;
238  using T::_absoluteArcWidths;
239
240
241  using T::_negY;
242  using T::_preScale;
243
244  // dradnats ++C eht yb deriuqer si ti eveileb t'naC
245
246  typedef typename T::Graph Graph;
247  typedef typename Graph::Node Node;
248  typedef typename Graph::NodeIt NodeIt;
249  typedef typename Graph::Arc Arc;
250  typedef typename Graph::ArcIt ArcIt;
251  typedef typename Graph::InArcIt InArcIt;
252  typedef typename Graph::OutArcIt OutArcIt;
253
254  static const int INTERPOL_PREC;
255  static const double A4HEIGHT;
256  static const double A4WIDTH;
257  static const double A4BORDER;
258
259  bool dontPrint;
260
261public:
262  ///Node shapes
263
264  ///Node shapes.
265  ///
266  enum NodeShapes {
267    /// = 0
268    ///\image html nodeshape_0.png
269    ///\image latex nodeshape_0.eps "CIRCLE shape (0)" width=2cm
270    CIRCLE=0,
271    /// = 1
272    ///\image html nodeshape_1.png
273    ///\image latex nodeshape_1.eps "SQUARE shape (1)" width=2cm
274    ///
275    SQUARE=1,
276    /// = 2
277    ///\image html nodeshape_2.png
278    ///\image latex nodeshape_2.eps "DIAMOND shape (2)" width=2cm
279    ///
280    DIAMOND=2,
281    /// = 3
282    ///\image html nodeshape_3.png
283    ///\image latex nodeshape_2.eps "MALE shape (4)" width=2cm
284    ///
285    MALE=3,
286    /// = 4
287    ///\image html nodeshape_4.png
288    ///\image latex nodeshape_2.eps "FEMALE shape (4)" width=2cm
289    ///
290    FEMALE=4
291  };
292
293private:
294  class arcLess {
295    const Graph &g;
296  public:
297    arcLess(const Graph &_g) : g(_g) {}
298    bool operator()(Arc a,Arc b) const
299    {
300      Node ai=std::min(g.source(a),g.target(a));
301      Node aa=std::max(g.source(a),g.target(a));
302      Node bi=std::min(g.source(b),g.target(b));
303      Node ba=std::max(g.source(b),g.target(b));
304      return ai<bi ||
305        (ai==bi && (aa < ba ||
306                    (aa==ba && ai==g.source(a) && bi==g.target(b))));
307    }
308  };
309  bool isParallel(Arc e,Arc f) const
310  {
311    return (g.source(e)==g.source(f)&&
312            g.target(e)==g.target(f)) ||
313      (g.source(e)==g.target(f)&&
314       g.target(e)==g.source(f));
315  }
316  template<class TT>
317  static std::string psOut(const dim2::Point<TT> &p)
318    {
319      std::ostringstream os;
320      os << p.x << ' ' << p.y;
321      return os.str();
322    }
323  static std::string psOut(const Color &c)
324    {
325      std::ostringstream os;
326      os << c.red() << ' ' << c.green() << ' ' << c.blue();
327      return os.str();
328    }
329
330public:
331  GraphToEps(const T &t) : T(t), dontPrint(false) {};
332
333  template<class X> struct CoordsTraits : public T {
334  typedef X CoordsMapType;
335    const X &_coords;
336    CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}
337  };
338  ///Sets the map of the node coordinates
339
340  ///Sets the map of the node coordinates.
341  ///\param x must be a node map with \ref dim2::Point "dim2::Point<double>" or
342  ///\ref dim2::Point "dim2::Point<int>" values.
343  template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
344    dontPrint=true;
345    return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));
346  }
347  template<class X> struct NodeSizesTraits : public T {
348    const X &_nodeSizes;
349    NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}
350  };
351  ///Sets the map of the node sizes
352
353  ///Sets the map of the node sizes.
354  ///\param x must be a node map with \c double (or convertible) values.
355  template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)
356  {
357    dontPrint=true;
358    return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));
359  }
360  template<class X> struct NodeShapesTraits : public T {
361    const X &_nodeShapes;
362    NodeShapesTraits(const T &t,const X &x) : T(t), _nodeShapes(x) {}
363  };
364  ///Sets the map of the node shapes
365
366  ///Sets the map of the node shapes.
367  ///The available shape values
368  ///can be found in \ref NodeShapes "enum NodeShapes".
369  ///\param x must be a node map with \c int (or convertible) values.
370  ///\sa NodeShapes
371  template<class X> GraphToEps<NodeShapesTraits<X> > nodeShapes(const X &x)
372  {
373    dontPrint=true;
374    return GraphToEps<NodeShapesTraits<X> >(NodeShapesTraits<X>(*this,x));
375  }
376  template<class X> struct NodeTextsTraits : public T {
377    const X &_nodeTexts;
378    NodeTextsTraits(const T &t,const X &x) : T(t), _nodeTexts(x) {}
379  };
380  ///Sets the text printed on the nodes
381
382  ///Sets the text printed on the nodes.
383  ///\param x must be a node map with type that can be pushed to a standard
384  ///\c ostream.
385  template<class X> GraphToEps<NodeTextsTraits<X> > nodeTexts(const X &x)
386  {
387    dontPrint=true;
388    _showNodeText=true;
389    return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
390  }
391  template<class X> struct NodePsTextsTraits : public T {
392    const X &_nodePsTexts;
393    NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
394  };
395  ///Inserts a PostScript block to the nodes
396
397  ///With this command it is possible to insert a verbatim PostScript
398  ///block to the nodes.
399  ///The PS current point will be moved to the center of the node before
400  ///the PostScript block inserted.
401  ///
402  ///Before and after the block a newline character is inserted so you
403  ///don't have to bother with the separators.
404  ///
405  ///\param x must be a node map with type that can be pushed to a standard
406  ///\c ostream.
407  ///
408  ///\sa nodePsTextsPreamble()
409  template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
410  {
411    dontPrint=true;
412    _showNodePsText=true;
413    return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
414  }
415  template<class X> struct ArcWidthsTraits : public T {
416    const X &_arcWidths;
417    ArcWidthsTraits(const T &t,const X &x) : T(t), _arcWidths(x) {}
418  };
419  ///Sets the map of the arc widths
420
421  ///Sets the map of the arc widths.
422  ///\param x must be an arc map with \c double (or convertible) values.
423  template<class X> GraphToEps<ArcWidthsTraits<X> > arcWidths(const X &x)
424  {
425    dontPrint=true;
426    return GraphToEps<ArcWidthsTraits<X> >(ArcWidthsTraits<X>(*this,x));
427  }
428
429  template<class X> struct NodeColorsTraits : public T {
430    const X &_nodeColors;
431    NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}
432  };
433  ///Sets the map of the node colors
434
435  ///Sets the map of the node colors.
436  ///\param x must be a node map with \ref Color values.
437  ///
438  ///\sa Palette
439  template<class X> GraphToEps<NodeColorsTraits<X> >
440  nodeColors(const X &x)
441  {
442    dontPrint=true;
443    return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));
444  }
445  template<class X> struct NodeTextColorsTraits : public T {
446    const X &_nodeTextColors;
447    NodeTextColorsTraits(const T &t,const X &x) : T(t), _nodeTextColors(x) {}
448  };
449  ///Sets the map of the node text colors
450
451  ///Sets the map of the node text colors.
452  ///\param x must be a node map with \ref Color values.
453  ///
454  ///\sa Palette
455  template<class X> GraphToEps<NodeTextColorsTraits<X> >
456  nodeTextColors(const X &x)
457  {
458    dontPrint=true;
459    _nodeTextColorType=CUST_COL;
460    return GraphToEps<NodeTextColorsTraits<X> >
461      (NodeTextColorsTraits<X>(*this,x));
462  }
463  template<class X> struct ArcColorsTraits : public T {
464    const X &_arcColors;
465    ArcColorsTraits(const T &t,const X &x) : T(t), _arcColors(x) {}
466  };
467  ///Sets the map of the arc colors
468
469  ///Sets the map of the arc colors.
470  ///\param x must be an arc map with \ref Color values.
471  ///
472  ///\sa Palette
473  template<class X> GraphToEps<ArcColorsTraits<X> >
474  arcColors(const X &x)
475  {
476    dontPrint=true;
477    return GraphToEps<ArcColorsTraits<X> >(ArcColorsTraits<X>(*this,x));
478  }
479  ///Sets a global scale factor for node sizes
480
481  ///Sets a global scale factor for node sizes.
482  ///
483  /// If nodeSizes() is not given, this function simply sets the node
484  /// sizes to \c d.  If nodeSizes() is given, but
485  /// autoNodeScale() is not, then the node size given by
486  /// nodeSizes() will be multiplied by the value \c d.
487  /// If both nodeSizes() and autoNodeScale() are used, then the
488  /// node sizes will be scaled in such a way that the greatest size will be
489  /// equal to \c d.
490  /// \sa nodeSizes()
491  /// \sa autoNodeScale()
492  GraphToEps<T> &nodeScale(double d=.01) {_nodeScale=d;return *this;}
493  ///Turns on/off the automatic node size scaling.
494
495  ///Turns on/off the automatic node size scaling.
496  ///
497  ///\sa nodeScale()
498  ///
499  GraphToEps<T> &autoNodeScale(bool b=true) {
500    _autoNodeScale=b;return *this;
501  }
502
503  ///Turns on/off the absolutematic node size scaling.
504
505  ///Turns on/off the absolutematic node size scaling.
506  ///
507  ///\sa nodeScale()
508  ///
509  GraphToEps<T> &absoluteNodeSizes(bool b=true) {
510    _absoluteNodeSizes=b;return *this;
511  }
512
513  ///Negates the Y coordinates.
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  GraphToEps<T> &scale(double d) {_scale=d;return *this;}
561  ///Sets the width of the border around the picture
562  GraphToEps<T> &border(double b=10) {_xBorder=_yBorder=b;return *this;}
563  ///Sets the width of the border around the picture
564  GraphToEps<T> &border(double x, double y) {
565    _xBorder=x;_yBorder=y;return *this;
566  }
567  ///Sets whether to draw arrows
568  GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}
569  ///Sets the length of the arrowheads
570  GraphToEps<T> &arrowLength(double d=1.0) {_arrowLength*=d;return *this;}
571  ///Sets the width of the arrowheads
572  GraphToEps<T> &arrowWidth(double d=.3) {_arrowWidth*=d;return *this;}
573
574  ///Scales the drawing to fit to A4 page
575  GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
576
577  ///Enables parallel arcs
578  GraphToEps<T> &enableParallel(bool b=true) {_enableParallel=b;return *this;}
579
580  ///Sets the distance between parallel arcs
581  GraphToEps<T> &parArcDist(double d) {_parArcDist*=d;return *this;}
582
583  ///Hides the arcs
584  GraphToEps<T> &hideArcs(bool b=true) {_showArcs=!b;return *this;}
585  ///Hides the nodes
586  GraphToEps<T> &hideNodes(bool b=true) {_showNodes=!b;return *this;}
587
588  ///Sets the size of the node texts
589  GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
590
591  ///Sets the color of the node texts to be different from the node color
592
593  ///Sets the color of the node texts to be as different from the node color
594  ///as it is possible.
595  GraphToEps<T> &distantColorNodeTexts()
596  {_nodeTextColorType=DIST_COL;return *this;}
597  ///Sets the color of the node texts to be black or white and always visible.
598
599  ///Sets the color of the node texts to be black or white according to
600  ///which is more different from the node color.
601  GraphToEps<T> &distantBWNodeTexts()
602  {_nodeTextColorType=DIST_BW;return *this;}
603
604  ///Gives a preamble block for node Postscript block.
605
606  ///Gives a preamble block for node Postscript block.
607  ///
608  ///\sa nodePsTexts()
609  GraphToEps<T> & nodePsTextsPreamble(const char *str) {
610    _nodePsTextsPreamble=str ;return *this;
611  }
612  ///Sets whether the graph is undirected
613
614  ///Sets whether the graph is undirected.
615  ///
616  ///This setting is the default for undirected graphs.
617  ///
618  ///\sa directed()
619   GraphToEps<T> &undirected(bool b=true) {_undirected=b;return *this;}
620
621  ///Sets whether the graph is directed
622
623  ///Sets whether the graph is directed.
624  ///Use it to show the edges as a pair of directed ones.
625  ///
626  ///This setting is the default for digraphs.
627  ///
628  ///\sa undirected()
629  GraphToEps<T> &directed(bool b=true) {_undirected=!b;return *this;}
630
631  ///Sets the title.
632
633  ///Sets the title of the generated image,
634  ///namely it inserts a <tt>%%Title:</tt> DSC field to the header of
635  ///the EPS file.
636  GraphToEps<T> &title(const std::string &t) {_title=t;return *this;}
637  ///Sets the copyright statement.
638
639  ///Sets the copyright statement of the generated image,
640  ///namely it inserts a <tt>%%Copyright:</tt> DSC field to the header of
641  ///the EPS file.
642  GraphToEps<T> &copyright(const std::string &t) {_copyright=t;return *this;}
643
644protected:
645  bool isInsideNode(dim2::Point<double> p, double r,int t)
646  {
647    switch(t) {
648    case CIRCLE:
649    case MALE:
650    case FEMALE:
651      return p.normSquare()<=r*r;
652    case SQUARE:
653      return p.x<=r&&p.x>=-r&&p.y<=r&&p.y>=-r;
654    case DIAMOND:
655      return p.x+p.y<=r && p.x-p.y<=r && -p.x+p.y<=r && -p.x-p.y<=r;
656    }
657    return false;
658  }
659
660public:
661  ~GraphToEps() { }
662
663  ///Draws the graph.
664
665  ///Like other functions using
666  ///\ref named-templ-func-param "named template parameters",
667  ///this function calls the algorithm itself, i.e. in this case
668  ///it draws the graph.
669  void run() {
670    const double EPSILON=1e-9;
671    if(dontPrint) return;
672
673    _graph_to_eps_bits::_NegY<typename T::CoordsMapType>
674      mycoords(_coords,_negY);
675
676    os << "%!PS-Adobe-2.0 EPSF-2.0\n";
677    if(_title.size()>0) os << "%%Title: " << _title << '\n';
678     if(_copyright.size()>0) os << "%%Copyright: " << _copyright << '\n';
679    os << "%%Creator: LEMON, graphToEps()\n";
680
681    {
682#ifndef WIN32
683      timeval tv;
684      gettimeofday(&tv, 0);
685
686      char cbuf[26];
687      ctime_r(&tv.tv_sec,cbuf);
688      os << "%%CreationDate: " << cbuf;
689#else
690      SYSTEMTIME time;
691      char buf1[11], buf2[9], buf3[5];
692
693      GetSystemTime(&time);
694      if (GetDateFormat(LOCALE_USER_DEFAULT, 0, &time,
695                        "ddd MMM dd", buf1, 11) &&
696          GetTimeFormat(LOCALE_USER_DEFAULT, 0, &time,
697                        "HH':'mm':'ss", buf2, 9) &&
698          GetDateFormat(LOCALE_USER_DEFAULT, 0, &time,
699                                "yyyy", buf3, 5)) {
700        os << "%%CreationDate: " << buf1 << ' '
701           << buf2 << ' ' << buf3 << std::endl;
702      }
703#endif
704    }
705
706    if (_autoArcWidthScale) {
707      double max_w=0;
708      for(ArcIt e(g);e!=INVALID;++e)
709        max_w=std::max(double(_arcWidths[e]),max_w);
710      if(max_w>EPSILON) {
711        _arcWidthScale/=max_w;
712      }
713    }
714
715    if (_autoNodeScale) {
716      double max_s=0;
717      for(NodeIt n(g);n!=INVALID;++n)
718        max_s=std::max(double(_nodeSizes[n]),max_s);
719      if(max_s>EPSILON) {
720        _nodeScale/=max_s;
721      }
722    }
723
724    double diag_len = 1;
725    if(!(_absoluteNodeSizes&&_absoluteArcWidths)) {
726      dim2::Box<double> bb;
727      for(NodeIt n(g);n!=INVALID;++n) bb.add(mycoords[n]);
728      if (bb.empty()) {
729        bb = dim2::Box<double>(dim2::Point<double>(0,0));
730      }
731      diag_len = std::sqrt((bb.bottomLeft()-bb.topRight()).normSquare());
732      if(diag_len<EPSILON) diag_len = 1;
733      if(!_absoluteNodeSizes) _nodeScale*=diag_len;
734      if(!_absoluteArcWidths) _arcWidthScale*=diag_len;
735    }
736
737    dim2::Box<double> bb;
738    for(NodeIt n(g);n!=INVALID;++n) {
739      double ns=_nodeSizes[n]*_nodeScale;
740      dim2::Point<double> p(ns,ns);
741      switch(_nodeShapes[n]) {
742      case CIRCLE:
743      case SQUARE:
744      case DIAMOND:
745        bb.add(p+mycoords[n]);
746        bb.add(-p+mycoords[n]);
747        break;
748      case MALE:
749        bb.add(-p+mycoords[n]);
750        bb.add(dim2::Point<double>(1.5*ns,1.5*std::sqrt(3.0)*ns)+mycoords[n]);
751        break;
752      case FEMALE:
753        bb.add(p+mycoords[n]);
754        bb.add(dim2::Point<double>(-ns,-3.01*ns)+mycoords[n]);
755        break;
756      }
757    }
758    if (bb.empty()) {
759      bb = dim2::Box<double>(dim2::Point<double>(0,0));
760    }
761
762    if(_scaleToA4)
763      os <<"%%BoundingBox: 0 0 596 842\n%%DocumentPaperSizes: a4\n";
764    else {
765      if(_preScale) {
766        //Rescale so that BoundingBox won't be neither to big nor too small.
767        while(bb.height()*_scale>1000||bb.width()*_scale>1000) _scale/=10;
768        while(bb.height()*_scale<100||bb.width()*_scale<100) _scale*=10;
769      }
770
771      os << "%%BoundingBox: "
772         << int(floor(bb.left()   * _scale - _xBorder)) << ' '
773         << int(floor(bb.bottom() * _scale - _yBorder)) << ' '
774         << int(ceil(bb.right()  * _scale + _xBorder)) << ' '
775         << int(ceil(bb.top()    * _scale + _yBorder)) << '\n';
776    }
777
778    os << "%%EndComments\n";
779
780    //x1 y1 x2 y2 x3 y3 cr cg cb w
781    os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
782       << "      4 2 roll 1 index 1 index curveto stroke } bind def\n";
783    os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke }"
784       << " bind def\n";
785    //x y r
786    os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath }"
787       << " bind def\n";
788    //x y r
789    os << "/sq { newpath 2 index 1 index add 2 index 2 index add moveto\n"
790       << "      2 index 1 index sub 2 index 2 index add lineto\n"
791       << "      2 index 1 index sub 2 index 2 index sub lineto\n"
792       << "      2 index 1 index add 2 index 2 index sub lineto\n"
793       << "      closepath pop pop pop} bind def\n";
794    //x y r
795    os << "/di { newpath 2 index 1 index add 2 index moveto\n"
796       << "      2 index             2 index 2 index add lineto\n"
797       << "      2 index 1 index sub 2 index             lineto\n"
798       << "      2 index             2 index 2 index sub lineto\n"
799       << "      closepath pop pop pop} bind def\n";
800    // x y r cr cg cb
801    os << "/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill\n"
802       << "     setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
803       << "   } bind def\n";
804    os << "/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill\n"
805       << "     setrgbcolor " << 1+_nodeBorderQuotient << " div sq fill\n"
806       << "   } bind def\n";
807    os << "/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill\n"
808       << "     setrgbcolor " << 1+_nodeBorderQuotient << " div di fill\n"
809       << "   } bind def\n";
810    os << "/nfemale { 0 0 0 setrgbcolor 3 index "
811       << _nodeBorderQuotient/(1+_nodeBorderQuotient)
812       << " 1.5 mul mul setlinewidth\n"
813       << "  newpath 5 index 5 index moveto "
814       << "5 index 5 index 5 index 3.01 mul sub\n"
815       << "  lineto 5 index 4 index .7 mul sub 5 index 5 index 2.2 mul sub"
816       << " moveto\n"
817       << "  5 index 4 index .7 mul add 5 index 5 index 2.2 mul sub lineto "
818       << "stroke\n"
819       << "  5 index 5 index 5 index c fill\n"
820       << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
821       << "  } bind def\n";
822    os << "/nmale {\n"
823       << "  0 0 0 setrgbcolor 3 index "
824       << _nodeBorderQuotient/(1+_nodeBorderQuotient)
825       <<" 1.5 mul mul setlinewidth\n"
826       << "  newpath 5 index 5 index moveto\n"
827       << "  5 index 4 index 1 mul 1.5 mul add\n"
828       << "  5 index 5 index 3 sqrt 1.5 mul mul add\n"
829       << "  1 index 1 index lineto\n"
830       << "  1 index 1 index 7 index sub moveto\n"
831       << "  1 index 1 index lineto\n"
832       << "  exch 5 index 3 sqrt .5 mul mul sub exch 5 index .5 mul sub"
833       << " lineto\n"
834       << "  stroke\n"
835       << "  5 index 5 index 5 index c fill\n"
836       << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
837       << "  } bind def\n";
838
839
840    os << "/arrl " << _arrowLength << " def\n";
841    os << "/arrw " << _arrowWidth << " def\n";
842    // l dx_norm dy_norm
843    os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";
844    //len w dx_norm dy_norm x1 y1 cr cg cb
845    os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx "
846       << "exch def\n"
847       << "       /w exch def /len exch def\n"
848      //<< "0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"
849       << "       newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"
850       << "       len w sub arrl sub dx dy lrl\n"
851       << "       arrw dy dx neg lrl\n"
852       << "       dx arrl w add mul dy w 2 div arrw add mul sub\n"
853       << "       dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"
854       << "       dx arrl w add mul neg dy w 2 div arrw add mul sub\n"
855       << "       dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"
856       << "       arrw dy dx neg lrl\n"
857       << "       len w sub arrl sub neg dx dy lrl\n"
858       << "       closepath fill } bind def\n";
859    os << "/cshow { 2 index 2 index moveto dup stringwidth pop\n"
860       << "         neg 2 div fosi .35 mul neg rmoveto show pop pop} def\n";
861
862    os << "\ngsave\n";
863    if(_scaleToA4)
864      if(bb.height()>bb.width()) {
865        double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.height(),
866                  (A4WIDTH-2*A4BORDER)/bb.width());
867        os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
868           << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER
869           << " translate\n"
870           << sc << " dup scale\n"
871           << -bb.left() << ' ' << -bb.bottom() << " translate\n";
872      }
873      else {
874        double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.width(),
875                  (A4WIDTH-2*A4BORDER)/bb.height());
876        os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
877           << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER
878           << " translate\n"
879           << sc << " dup scale\n90 rotate\n"
880           << -bb.left() << ' ' << -bb.top() << " translate\n";
881        }
882    else if(_scale!=1.0) os << _scale << " dup scale\n";
883
884    if(_showArcs) {
885      os << "%Arcs:\ngsave\n";
886      if(_enableParallel) {
887        std::vector<Arc> el;
888        for(ArcIt e(g);e!=INVALID;++e)
889          if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
890             &&g.source(e)!=g.target(e))
891            el.push_back(e);
892        std::sort(el.begin(),el.end(),arcLess(g));
893
894        typename std::vector<Arc>::iterator j;
895        for(typename std::vector<Arc>::iterator i=el.begin();i!=el.end();i=j) {
896          for(j=i+1;j!=el.end()&&isParallel(*i,*j);++j) ;
897
898          double sw=0;
899          for(typename std::vector<Arc>::iterator e=i;e!=j;++e)
900            sw+=_arcWidths[*e]*_arcWidthScale+_parArcDist;
901          sw-=_parArcDist;
902          sw/=-2.0;
903          dim2::Point<double>
904            dvec(mycoords[g.target(*i)]-mycoords[g.source(*i)]);
905          double l=std::sqrt(dvec.normSquare());
906          dim2::Point<double> d(dvec/std::max(l,EPSILON));
907          dim2::Point<double> m;
908//           m=dim2::Point<double>(mycoords[g.target(*i)]+
909//                                 mycoords[g.source(*i)])/2.0;
910
911//            m=dim2::Point<double>(mycoords[g.source(*i)])+
912//             dvec*(double(_nodeSizes[g.source(*i)])/
913//                (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
914
915          m=dim2::Point<double>(mycoords[g.source(*i)])+
916            d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
917
918          for(typename std::vector<Arc>::iterator e=i;e!=j;++e) {
919            sw+=_arcWidths[*e]*_arcWidthScale/2.0;
920            dim2::Point<double> mm=m+rot90(d)*sw/.75;
921            if(_drawArrows) {
922              int node_shape;
923              dim2::Point<double> s=mycoords[g.source(*e)];
924              dim2::Point<double> t=mycoords[g.target(*e)];
925              double rn=_nodeSizes[g.target(*e)]*_nodeScale;
926              node_shape=_nodeShapes[g.target(*e)];
927              dim2::Bezier3 bez(s,mm,mm,t);
928              double t1=0,t2=1;
929              for(int ii=0;ii<INTERPOL_PREC;++ii)
930                if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t2=(t1+t2)/2;
931                else t1=(t1+t2)/2;
932              dim2::Point<double> apoint=bez((t1+t2)/2);
933              rn = _arrowLength+_arcWidths[*e]*_arcWidthScale;
934              rn*=rn;
935              t2=(t1+t2)/2;t1=0;
936              for(int ii=0;ii<INTERPOL_PREC;++ii)
937                if((bez((t1+t2)/2)-apoint).normSquare()>rn) t1=(t1+t2)/2;
938                else t2=(t1+t2)/2;
939              dim2::Point<double> linend=bez((t1+t2)/2);
940              bez=bez.before((t1+t2)/2);
941//               rn=_nodeSizes[g.source(*e)]*_nodeScale;
942//               node_shape=_nodeShapes[g.source(*e)];
943//               t1=0;t2=1;
944//               for(int i=0;i<INTERPOL_PREC;++i)
945//                 if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape))
946//                   t1=(t1+t2)/2;
947//                 else t2=(t1+t2)/2;
948//               bez=bez.after((t1+t2)/2);
949              os << _arcWidths[*e]*_arcWidthScale << " setlinewidth "
950                 << _arcColors[*e].red() << ' '
951                 << _arcColors[*e].green() << ' '
952                 << _arcColors[*e].blue() << " setrgbcolor newpath\n"
953                 << bez.p1.x << ' ' <<  bez.p1.y << " moveto\n"
954                 << bez.p2.x << ' ' << bez.p2.y << ' '
955                 << bez.p3.x << ' ' << bez.p3.y << ' '
956                 << bez.p4.x << ' ' << bez.p4.y << " curveto stroke\n";
957              dim2::Point<double> dd(rot90(linend-apoint));
958              dd*=(.5*_arcWidths[*e]*_arcWidthScale+_arrowWidth)/
959                std::sqrt(dd.normSquare());
960              os << "newpath " << psOut(apoint) << " moveto "
961                 << psOut(linend+dd) << " lineto "
962                 << psOut(linend-dd) << " lineto closepath fill\n";
963            }
964            else {
965              os << mycoords[g.source(*e)].x << ' '
966                 << mycoords[g.source(*e)].y << ' '
967                 << mm.x << ' ' << mm.y << ' '
968                 << mycoords[g.target(*e)].x << ' '
969                 << mycoords[g.target(*e)].y << ' '
970                 << _arcColors[*e].red() << ' '
971                 << _arcColors[*e].green() << ' '
972                 << _arcColors[*e].blue() << ' '
973                 << _arcWidths[*e]*_arcWidthScale << " lb\n";
974            }
975            sw+=_arcWidths[*e]*_arcWidthScale/2.0+_parArcDist;
976          }
977        }
978      }
979      else for(ArcIt e(g);e!=INVALID;++e)
980        if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
981           &&g.source(e)!=g.target(e)) {
982          if(_drawArrows) {
983            dim2::Point<double> d(mycoords[g.target(e)]-mycoords[g.source(e)]);
984            double rn=_nodeSizes[g.target(e)]*_nodeScale;
985            int node_shape=_nodeShapes[g.target(e)];
986            double t1=0,t2=1;
987            for(int i=0;i<INTERPOL_PREC;++i)
988              if(isInsideNode((-(t1+t2)/2)*d,rn,node_shape)) t1=(t1+t2)/2;
989              else t2=(t1+t2)/2;
990            double l=std::sqrt(d.normSquare());
991            d/=l;
992
993            os << l*(1-(t1+t2)/2) << ' '
994               << _arcWidths[e]*_arcWidthScale << ' '
995               << d.x << ' ' << d.y << ' '
996               << mycoords[g.source(e)].x << ' '
997               << mycoords[g.source(e)].y << ' '
998               << _arcColors[e].red() << ' '
999               << _arcColors[e].green() << ' '
1000               << _arcColors[e].blue() << " arr\n";
1001          }
1002          else os << mycoords[g.source(e)].x << ' '
1003                  << mycoords[g.source(e)].y << ' '
1004                  << mycoords[g.target(e)].x << ' '
1005                  << mycoords[g.target(e)].y << ' '
1006                  << _arcColors[e].red() << ' '
1007                  << _arcColors[e].green() << ' '
1008                  << _arcColors[e].blue() << ' '
1009                  << _arcWidths[e]*_arcWidthScale << " l\n";
1010        }
1011      os << "grestore\n";
1012    }
1013    if(_showNodes) {
1014      os << "%Nodes:\ngsave\n";
1015      for(NodeIt n(g);n!=INVALID;++n) {
1016        os << mycoords[n].x << ' ' << mycoords[n].y << ' '
1017           << _nodeSizes[n]*_nodeScale << ' '
1018           << _nodeColors[n].red() << ' '
1019           << _nodeColors[n].green() << ' '
1020           << _nodeColors[n].blue() << ' ';
1021        switch(_nodeShapes[n]) {
1022        case CIRCLE:
1023          os<< "nc";break;
1024        case SQUARE:
1025          os<< "nsq";break;
1026        case DIAMOND:
1027          os<< "ndi";break;
1028        case MALE:
1029          os<< "nmale";break;
1030        case FEMALE:
1031          os<< "nfemale";break;
1032        }
1033        os<<'\n';
1034      }
1035      os << "grestore\n";
1036    }
1037    if(_showNodeText) {
1038      os << "%Node texts:\ngsave\n";
1039      os << "/fosi " << _nodeTextSize << " def\n";
1040      os << "(Helvetica) findfont fosi scalefont setfont\n";
1041      for(NodeIt n(g);n!=INVALID;++n) {
1042        switch(_nodeTextColorType) {
1043        case DIST_COL:
1044          os << psOut(distantColor(_nodeColors[n])) << " setrgbcolor\n";
1045          break;
1046        case DIST_BW:
1047          os << psOut(distantBW(_nodeColors[n])) << " setrgbcolor\n";
1048          break;
1049        case CUST_COL:
1050          os << psOut(distantColor(_nodeTextColors[n])) << " setrgbcolor\n";
1051          break;
1052        default:
1053          os << "0 0 0 setrgbcolor\n";
1054        }
1055        os << mycoords[n].x << ' ' << mycoords[n].y
1056           << " (" << _nodeTexts[n] << ") cshow\n";
1057      }
1058      os << "grestore\n";
1059    }
1060    if(_showNodePsText) {
1061      os << "%Node PS blocks:\ngsave\n";
1062      for(NodeIt n(g);n!=INVALID;++n)
1063        os << mycoords[n].x << ' ' << mycoords[n].y
1064           << " moveto\n" << _nodePsTexts[n] << "\n";
1065      os << "grestore\n";
1066    }
1067
1068    os << "grestore\nshowpage\n";
1069
1070    //CleanUp:
1071    if(_pleaseRemoveOsStream) {delete &os;}
1072  }
1073
1074  ///\name Aliases
1075  ///These are just some aliases to other parameter setting functions.
1076
1077  ///@{
1078
1079  ///An alias for arcWidths()
1080  template<class X> GraphToEps<ArcWidthsTraits<X> > edgeWidths(const X &x)
1081  {
1082    return arcWidths(x);
1083  }
1084
1085  ///An alias for arcColors()
1086  template<class X> GraphToEps<ArcColorsTraits<X> >
1087  edgeColors(const X &x)
1088  {
1089    return arcColors(x);
1090  }
1091
1092  ///An alias for arcWidthScale()
1093  GraphToEps<T> &edgeWidthScale(double d) {return arcWidthScale(d);}
1094
1095  ///An alias for autoArcWidthScale()
1096  GraphToEps<T> &autoEdgeWidthScale(bool b=true)
1097  {
1098    return autoArcWidthScale(b);
1099  }
1100
1101  ///An alias for absoluteArcWidths()
1102  GraphToEps<T> &absoluteEdgeWidths(bool b=true)
1103  {
1104    return absoluteArcWidths(b);
1105  }
1106
1107  ///An alias for parArcDist()
1108  GraphToEps<T> &parEdgeDist(double d) {return parArcDist(d);}
1109
1110  ///An alias for hideArcs()
1111  GraphToEps<T> &hideEdges(bool b=true) {return hideArcs(b);}
1112
1113  ///@}
1114};
1115
1116template<class T>
1117const int GraphToEps<T>::INTERPOL_PREC = 20;
1118template<class T>
1119const double GraphToEps<T>::A4HEIGHT = 841.8897637795276;
1120template<class T>
1121const double GraphToEps<T>::A4WIDTH  = 595.275590551181;
1122template<class T>
1123const double GraphToEps<T>::A4BORDER = 15;
1124
1125
1126///Generates an EPS file from a graph
1127
1128///\ingroup eps_io
1129///Generates an EPS file from a graph.
1130///\param g Reference to the graph to be printed.
1131///\param os Reference to the output stream.
1132///By default it is <tt>std::cout</tt>.
1133///
1134///This function also has a lot of
1135///\ref named-templ-func-param "named parameters",
1136///they are declared as the members of class \ref GraphToEps. The following
1137///example shows how to use these parameters.
1138///\code
1139/// graphToEps(g,os).scale(10).coords(coords)
1140///              .nodeScale(2).nodeSizes(sizes)
1141///              .arcWidthScale(.4).run();
1142///\endcode
1143///
1144///For more detailed examples see the \ref graph_to_eps_demo.cc demo file.
1145///
1146///\warning Don't forget to put the \ref GraphToEps::run() "run()"
1147///to the end of the parameter list.
1148///\sa GraphToEps
1149///\sa graphToEps(G &g, const char *file_name)
1150template<class G>
1151GraphToEps<DefaultGraphToEpsTraits<G> >
1152graphToEps(G &g, std::ostream& os=std::cout)
1153{
1154  return
1155    GraphToEps<DefaultGraphToEpsTraits<G> >(DefaultGraphToEpsTraits<G>(g,os));
1156}
1157
1158///Generates an EPS file from a graph
1159
1160///\ingroup eps_io
1161///This function does the same as
1162///\ref graphToEps(G &g,std::ostream& os)
1163///but it writes its output into the file \c file_name
1164///instead of a stream.
1165///\sa graphToEps(G &g, std::ostream& os)
1166template<class G>
1167GraphToEps<DefaultGraphToEpsTraits<G> >
1168graphToEps(G &g,const char *file_name)
1169{
1170  std::ostream* os = new std::ofstream(file_name);
1171  if (!(*os)) {
1172    delete os;
1173    throw IoError("Cannot write file", file_name);
1174  }
1175  return GraphToEps<DefaultGraphToEpsTraits<G> >
1176    (DefaultGraphToEpsTraits<G>(g,*os,true));
1177}
1178
1179///Generates an EPS file from a graph
1180
1181///\ingroup eps_io
1182///This function does the same as
1183///\ref graphToEps(G &g,std::ostream& os)
1184///but it writes its output into the file \c file_name
1185///instead of a stream.
1186///\sa graphToEps(G &g, std::ostream& os)
1187template<class G>
1188GraphToEps<DefaultGraphToEpsTraits<G> >
1189graphToEps(G &g,const std::string& file_name)
1190{
1191  std::ostream* os = new std::ofstream(file_name.c_str());
1192  if (!(*os)) {
1193    delete os;
1194    throw IoError("Cannot write file", file_name);
1195  }
1196  return GraphToEps<DefaultGraphToEpsTraits<G> >
1197    (DefaultGraphToEpsTraits<G>(g,*os,true));
1198}
1199
1200} //END OF NAMESPACE LEMON
1201
1202#endif // LEMON_GRAPH_TO_EPS_H
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