Fix crash when the input file does not contain any nodeset or edgeset.
2 * demo/graph_to_eps.cc - Part of LEMON, a generic C++ optimization library
4 * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
5 * (Egervary Research Group on Combinatorial Optimization, EGRES).
7 * Permission to use, modify and distribute this software is granted
8 * provided that this copyright notice appears in all copies. For
9 * precise terms see the accompanying LICENSE file.
11 * This software is provided "AS IS" with no warranty of any kind,
12 * express or implied, and with no claim as to its suitability for any
19 /// \brief Demo of the graph grawing function \ref graphToEps()
21 /// This demo program shows examples how to use the function \ref
22 /// graphToEps(). It takes no input but simply creates six
23 /// <tt>.eps</tt> files demonstrating the capability of \ref
24 /// graphToEps(), and showing how to draw directed/undirected graphs,
25 /// how to handle parallel egdes, how to change the properties (like
26 /// color, shape, size, title etc.) of nodes and edges individually
27 /// using appropriate \ref maps-page "graph maps".
29 /// \include graph_to_eps_demo.cc
33 #include<lemon/graph_to_eps.h>
34 #include<lemon/list_graph.h>
35 #include<lemon/graph_utils.h>
38 using namespace lemon;
45 typedef ListGraph::Node Node;
46 typedef ListGraph::NodeIt NodeIt;
47 typedef ListGraph::Edge Edge;
56 ListGraph::NodeMap<Xy> coords(g);
57 ListGraph::NodeMap<double> sizes(g);
58 ListGraph::NodeMap<int> colors(g);
59 ListGraph::NodeMap<int> shapes(g);
60 ListGraph::EdgeMap<int> ecolors(g);
61 ListGraph::EdgeMap<int> widths(g);
63 coords[n1]=Xy(50,50); sizes[n1]=1; colors[n1]=1; shapes[n1]=0;
64 coords[n2]=Xy(50,70); sizes[n2]=2; colors[n2]=2; shapes[n2]=2;
65 coords[n3]=Xy(70,70); sizes[n3]=1; colors[n3]=3; shapes[n3]=0;
66 coords[n4]=Xy(70,50); sizes[n4]=2; colors[n4]=4; shapes[n4]=1;
67 coords[n5]=Xy(85,60); sizes[n5]=3; colors[n5]=5; shapes[n5]=2;
71 e=g.addEdge(n1,n2); ecolors[e]=0; widths[e]=1;
72 e=g.addEdge(n2,n3); ecolors[e]=0; widths[e]=1;
73 e=g.addEdge(n3,n5); ecolors[e]=0; widths[e]=3;
74 e=g.addEdge(n5,n4); ecolors[e]=0; widths[e]=1;
75 e=g.addEdge(n4,n1); ecolors[e]=0; widths[e]=1;
76 e=g.addEdge(n2,n4); ecolors[e]=1; widths[e]=2;
77 e=g.addEdge(n3,n4); ecolors[e]=2; widths[e]=1;
79 IdMap<ListGraph,Node> id(g);
81 cout << "Create 'graph_to_eps_demo_out.eps'" << endl;
82 graphToEps(g,"graph_to_eps_demo_out.eps").scale(10).coords(coords).
83 title("Sample .eps figure").
84 copyright("(C) 2005 LEMON Project").
85 nodeScale(2).nodeSizes(sizes).
87 nodeColors(composeMap(colorSet,colors)).
88 edgeColors(composeMap(colorSet,ecolors)).
89 edgeWidthScale(.4).edgeWidths(widths).
90 nodeTexts(id).nodeTextSize(3).
94 cout << "Create 'graph_to_eps_demo_out_arr.eps'" << endl;
95 graphToEps(g,"graph_to_eps_demo_out_arr.eps").scale(10).
96 title("Sample .eps figure (with arrowheads)").
97 copyright("(C) 2005 LEMON Project").
98 nodeColors(composeMap(colorSet,colors)).
100 nodeScale(2).nodeSizes(sizes).
102 edgeColors(composeMap(colorSet,ecolors)).
103 edgeWidthScale(.4).edgeWidths(widths).
104 nodeTexts(id).nodeTextSize(3).
105 drawArrows().arrowWidth(1).arrowLength(1).
108 e=g.addEdge(n1,n4); ecolors[e]=2; widths[e]=1;
109 e=g.addEdge(n4,n1); ecolors[e]=1; widths[e]=2;
111 e=g.addEdge(n1,n2); ecolors[e]=1; widths[e]=1;
112 e=g.addEdge(n1,n2); ecolors[e]=2; widths[e]=1;
113 e=g.addEdge(n1,n2); ecolors[e]=3; widths[e]=1;
114 e=g.addEdge(n1,n2); ecolors[e]=4; widths[e]=1;
115 e=g.addEdge(n1,n2); ecolors[e]=5; widths[e]=1;
116 e=g.addEdge(n1,n2); ecolors[e]=6; widths[e]=1;
117 e=g.addEdge(n1,n2); ecolors[e]=7; widths[e]=1;
119 cout << "Create 'graph_to_eps_demo_out_par.eps'" << endl;
120 graphToEps(g,"graph_to_eps_demo_out_par.eps").scale(10).
121 title("Sample .eps figure (parallel edges)").
122 copyright("(C) 2005 LEMON Project").
125 nodeScale(2).nodeSizes(sizes).
126 nodeColors(composeMap(colorSet,colors)).
127 edgeColors(composeMap(colorSet,ecolors)).
128 edgeWidthScale(.4).edgeWidths(widths).
129 nodeTexts(id).nodeTextSize(3).
130 enableParallel().parEdgeDist(1.5).
133 cout << "Create 'graph_to_eps_demo_out_par_arr.eps'" << endl;
134 graphToEps(g,"graph_to_eps_demo_out_par_arr.eps").scale(10).
135 title("Sample .eps figure (parallel edges and arrowheads)").
136 copyright("(C) 2005 LEMON Project").
137 nodeScale(2).nodeSizes(sizes).
140 nodeColors(composeMap(colorSet,colors)).
141 edgeColors(composeMap(colorSet,ecolors)).
142 edgeWidthScale(.3).edgeWidths(widths).
143 nodeTexts(id).nodeTextSize(3).
144 enableParallel().parEdgeDist(1).
145 drawArrows().arrowWidth(1).arrowLength(1).
148 cout << "Create 'graph_to_eps_demo_out_a4.eps'" << endl;
149 graphToEps(g,"graph_to_eps_demo_out_a4.eps").scaleToA4().
150 title("Sample .eps figure (fits to A4)").
151 copyright("(C) 2005 LEMON Project").
152 nodeScale(2).nodeSizes(sizes).
155 nodeColors(composeMap(colorSet,colors)).
156 edgeColors(composeMap(colorSet,ecolors)).
157 edgeWidthScale(.3).edgeWidths(widths).
158 nodeTexts(id).nodeTextSize(3).
159 enableParallel().parEdgeDist(1).
160 drawArrows().arrowWidth(1).arrowLength(1).
164 ListGraph::NodeMap<int> hcolors(h);
165 ListGraph::NodeMap<Xy> hcoords(h);
167 int cols=int(sqrt(double(colorSet.size())));
168 for(int i=0;i<int(colorSet.size());i++) {
170 hcoords[n]=Xy(i%cols,i/cols);
174 cout << "Create 'graph_to_eps_demo_out_colors.eps'" << endl;
175 graphToEps(h,"graph_to_eps_demo_out_colors.eps").scale(60).
176 title("Sample .eps figure (ColorSet demo)").
177 copyright("(C) 2005 LEMON Project").
180 distantColorNodeTexts().
181 // distantBWNodeTexts().
182 nodeTexts(hcolors).nodeTextSize(.6).
183 nodeColors(composeMap(colorSet,hcolors)).