source: trunk/lib/Graph.cc @ 1126

Last change on this file since 1126 was 1126, checked in by Peter Johansson, 11 years ago

fixes #437. setting image geometry to 600x500

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File size: 4.9 KB
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1// $Id: Graph.cc 1126 2010-07-08 02:11:36Z peter $
2
3/*
4  Copyright (C) 2009 Jari Häkkinen, Peter Johansson
5  Copyright (C) 2010 Peter Johansson
6
7  This file is part of svndigest, http://dev.thep.lu.se/svndigest
8
9  svndigest is free software; you can redistribute it and/or modify it
10  under the terms of the GNU General Public License as published by
11  the Free Software Foundation; either version 3 of the License, or
12  (at your option) any later version.
13
14  svndigest is distributed in the hope that it will be useful, but
15  WITHOUT ANY WARRANTY; without even the implied warranty of
16  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  General Public License for more details.
18
19  You should have received a copy of the GNU General Public License
20  along with svndigest. If not, see <http://www.gnu.org/licenses/>.
21*/
22
23#include "Graph.h"
24
25#include "Date.h"
26
27#include <algorithm>
28#include <cmath>
29#include <sstream>
30
31namespace theplu {
32namespace svndigest {
33
34  std::vector<std::string> Graph::xticks_;
35
36  Graph::Graph(const std::string& filename, const std::string& format)
37#ifdef HAVE_PLPLOT
38    : plots_(0), pls_(1,1,format.c_str(),filename.c_str()), timeformat_("%y-%b"),
39      title_(filename), xmin_(0.0), xmax_(0.0), ymin_(0.0), ymax_(0.0)
40  {
41    // should match the maximum number of authors plotted, change this
42    // when the maximum number of authors becomes configurable
43    legend_.reserve(10);
44    // we use color map 0 position 0 for background color
45    if (format=="png")
46      pls_.scolbg(255,255,255);
47    else
48      pls_.scolbga(255,255,255,0);
49    pls_.setopt("geometry", "600x500");
50    pls_.init();
51    pls_.adv(0);
52    pls_.vsta();
53    pls_.syax(6,0);
54  }
55#else
56{}
57#endif
58
59
60  Graph::~Graph(void)
61  {
62    print_legend();
63  }
64
65
66  bool Graph::date_xticks(void)
67  {
68    return xticks_.size() != 0;
69  }
70
71
72  void Graph::current_color(const legend_data& legend)
73  {
74    // we use color map 0 position 1 for current color
75#ifdef HAVE_PLPLOT
76    pls_.scol0a(1,legend.r,legend.g,legend.b,1.0);
77#endif
78  }
79
80
81  void Graph::current_color(unsigned char r, unsigned char g, unsigned char b)
82  {
83    // we use color map 0 position 1 for current color
84#ifdef HAVE_PLPLOT
85    pls_.scol0a(1,r,g,b,1.0);
86#endif
87  }
88
89
90  void Graph::plot(const std::vector<unsigned int>& y, const std::string& label,
91                   unsigned int lines)
92  {
93#ifdef HAVE_PLPLOT
94    if (!plots_) {
95      // date[0] is not the oldest when repo is imported with cvs2svn
96      xmin_= date_xticks() ? 
97        std::min( Date(xticks_[0]), Date(xticks_[1]) ).seconds() : 0;
98      xmax_= date_xticks() ? Date(xticks_.back()).seconds() : y.size();
99      xrange_=xmax_-xmin_;
100      yrange_=ymax_-ymin_;
101      pls_.wind(xmin_, xmax_, ymin_, ymax_);
102
103      // draw plot frame, x and y ticks only for the first plot
104      pls_.scol0a(2,0,0,0,1.0);
105      pls_.col0(2);
106
107      std::string xopt("bcnstv");
108      if (date_xticks()) {
109        pls_.timefmt(timeformat_.c_str());
110        xopt="bcnstd";
111      }
112
113      unsigned int ytickspacing=tick_spacing(yrange_);
114      unsigned int xtickspacing=tick_spacing(xrange_);
115      pls_.box(xopt.c_str(), xtickspacing, 1, "bcnstv", ytickspacing, 2);
116      pls_.lab("Date", "Number of lines", title_.c_str());
117    }
118    ++plots_;
119
120    pls_.col0(1);
121    for (unsigned int i=1; i<y.size(); ++i) {
122      PLFLT x0=i-1;
123      PLFLT x1=i;
124      if (date_xticks()) {
125        x0=Date(xticks_[i-1]).seconds();
126        x1=Date(xticks_[i]).seconds();
127      }
128      pls_.join(x0, y[i-1], x0, y[i]);
129      pls_.join(x0, y[i]  , x1, y[i]);
130    }
131
132    legend_data legend;
133    legend.label=label;
134    legend.lines=lines;
135    pls_.gcol0(1,legend.r,legend.g,legend.b);
136    legend_.push_back(legend);
137#endif
138  }
139
140
141  void Graph::print_legend(void)
142  {
143#ifdef HAVE_PLPLOT
144    PLFLT line_length=0.05*xrange_;
145    PLFLT x=xmin_+1.7*line_length;
146    unsigned char characteristic=log10(ymax_);
147    PLFLT legend_lines_length=0.016*xrange_*(characteristic+1);
148    PLFLT dx=0.005*xrange_;
149    PLFLT dy=0.003*yrange_;
150    unsigned int row=0;
151    std::reverse(legend_.begin(), legend_.end());
152    for (std::vector<legend_data>::const_iterator i=legend_.begin();
153         i!=legend_.end(); i++, ++row) {
154      PLFLT y=(0.95-0.04*row)*yrange_;
155      current_color(*i);
156      pls_.col0(1);
157      pls_.join(x-line_length, y-dy, x, y-dy);
158      std::stringstream ss;
159      ss << i->lines;
160      pls_.col0(2);
161      pls_.ptex(x+legend_lines_length+dx*2, y, 0, 0, 0, i->label.c_str());
162      pls_.ptex(x+legend_lines_length+dx  , y, 0, 0, 1, ss.str().c_str());
163    }
164#endif
165  }
166
167
168  void Graph::set_dates(const std::vector<std::string>& date)
169  {
170    xticks_=date;
171  }
172
173
174  unsigned int Graph::tick_spacing(const double range) const
175  {
176    double frac=range/5;
177    unsigned char characteristic= static_cast<unsigned char>(std::log10(frac));
178    unsigned int power=static_cast<unsigned int>(std::pow(10.0, characteristic));
179    unsigned char msn=static_cast<unsigned char>(frac/power);
180    return power*msn;
181  }
182
183
184  void Graph::timeformat(const std::string& format)
185  {
186    timeformat_=format;
187  }
188
189
190  const std::vector<std::string>& Graph::xticks(void)
191  {
192    return xticks_;
193  }
194
195
196  double Graph::ymax(double ymax)
197  {
198    return ymax_=ymax;
199  }
200
201}} // end of namespace svndigest and namespace theplu
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