source: trunk/lib/Graph.h @ 1255

Last change on this file since 1255 was 1255, checked in by Peter Johansson, 11 years ago

closes #214. Using tree.log to detect the first revision for the tree
and use that to set the x-range in plots. The call to tree.log is for
free since it will be re-cycled in printing the first page and we get
rid of the call to log of the repo log.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 4.2 KB
Line 
1#ifndef _theplu_svndigest_graph_
2#define _theplu_svndigest_graph_
3
4// $Id: Graph.h 1255 2010-11-01 03:31:50Z peter $
5
6/*
7  Copyright (C) 2009 Jari Häkkinen, Peter Johansson
8  Copyright (C) 2010 Peter Johansson
9
10  This file is part of svndigest, http://dev.thep.lu.se/svndigest
11
12  svndigest is free software; you can redistribute it and/or modify it
13  under the terms of the GNU General Public License as published by
14  the Free Software Foundation; either version 3 of the License, or
15  (at your option) any later version.
16
17  svndigest is distributed in the hope that it will be useful, but
18  WITHOUT ANY WARRANTY; without even the implied warranty of
19  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20  General Public License for more details.
21
22  You should have received a copy of the GNU General Public License
23  along with svndigest. If not, see <http://www.gnu.org/licenses/>.
24*/
25
26#include <config.h>
27
28#include "Vector.h"
29
30#include <subversion-1/svn_types.h>
31
32#include <ctime>
33#include <string>
34#include <vector>
35
36#ifdef HAVE_PLPLOT
37#include <plplot/plstream.h>
38#else
39typedef int PLINT;
40typedef double PLFLT;
41typedef double plstream;
42#endif
43
44namespace theplu {
45namespace svndigest {
46
47  /**
48     Graph is used to generate plots in svndigest and is a specialized
49     wrapper to the plplot plot library, http://plplot.sourceforge.net/
50
51     Graph allows some axis label manipulation, setting pen colour,
52     and plotting lines.
53
54     Graph supports three graphics formats - portable network graphics
55     (png), scalable vector graphics (svg), and protable document
56     format (pdf) - if the underlying plplot library was built with
57     the appropriate modules. If not, rebuild and reinstall plplot.
58  */
59  class Graph
60  {
61  public:
62
63    /**
64       \brief Constructor
65
66       \a filename to be defined depending on whether we'll support
67       more output formats than SVG.
68
69       \note The plot legend is created in the destructioe, i.e., when
70       the graph object is destroyed.
71    */
72    Graph(const std::string& filename, const std::string& format);
73
74    /**
75       \brief Destructor
76    */
77    ~Graph(void);
78
79    /**
80       \brief Set the pen colour to use in next drawing call
81    */
82    void current_color(unsigned char r, unsigned char g, unsigned char b);
83
84    static bool date_xticks(void);
85
86    /**
87       \brief Plot \a data and use \a lines and \a label to compose
88       the legend label.
89
90       The legend will be a coloured line followed by \a lines
91       followed by \a label.
92
93       The label order in the legend is reverse to the plot order,
94       i.e., the last plotted line will get the top entry in the
95       legend, the second to last plotted line will be the second
96       legend entry, and so on.
97    */
98    void plot(const SumVector& data, const std::string& label,
99              unsigned int lines);
100
101    /**
102       Sets the left end of xrange to correspond to revision \a rev.
103     */
104    static void rev_min(svn_revnum_t rev);
105
106    /**
107       \brief Function setting the dates.
108
109       The date is given in seconds (since 1/1 1970)
110    */
111    static void set_dates(const std::vector<time_t>& date);
112
113    /**
114       \brief Set x-axis tick value format to \a format. The format is
115       only used when dates are used.
116    */
117    void timeformat(const std::string& format);
118
119    static const std::vector<time_t>& xticks(void);
120
121    /**
122       \brief Set max y value in the plot
123
124       The plot area is (xstart,0) to (xend,\a ymax) where xend is
125       either the length of vector to plot (corresponds to latest
126       revision number) or the date of the last revision commit,
127       xstart is 0 or the date of the first commit.
128    */
129    double ymax(double ymax);
130
131  private:
132
133    // Copy constructor not implemented
134    Graph(const Graph&);
135
136    struct legend_data {
137      std::string label;
138      unsigned int lines;
139      PLINT r,g,b;
140    };
141
142    /**
143       \brief Set the pen colour to use in next drawing call
144    */
145    void current_color(const legend_data&);
146    void print_legend(void);
147    void staircase(svn_revnum_t rev0, PLFLT y0, svn_revnum_t rev1, PLFLT y1);
148    unsigned int tick_spacing(const double range) const;
149
150    std::vector<legend_data> legend_;
151    unsigned int plots_; // keep track of number of plots drawn
152    plstream pls_;
153    static svn_revnum_t rev_min_;
154    std::string timeformat_;
155    std::string title_;
156    static std::vector<time_t> xticks_;
157    PLFLT xmin_, xmax_, xrange_, ymin_, ymax_, yrange_;
158  };
159
160}} // end of namespace svndigest and namespace theplu
161
162#endif
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