source: trunk/lib/Graph.cc @ 1255

Last change on this file since 1255 was 1255, checked in by Peter Johansson, 12 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: 5.3 KB
Line 
1// $Id: Graph.cc 1255 2010-11-01 03:31:50Z 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 <cassert>
29#include <cmath>
30#include <sstream>
31
32namespace theplu {
33namespace svndigest {
34
35  svn_revnum_t Graph::rev_min_=0;
36  std::vector<time_t> Graph::xticks_;
37
38  Graph::Graph(const std::string& filename, const std::string& format)
39#ifdef HAVE_PLPLOT
40    : plots_(0), pls_(1,1,format.c_str(),filename.c_str()), timeformat_("%y-%b"),
41      title_(filename), xmin_(0.0), xmax_(0.0), ymin_(0.0), ymax_(0.0)
42  {
43    // should match the maximum number of authors plotted, change this
44    // when the maximum number of authors becomes configurable
45    legend_.reserve(10);
46    // we use color map 0 position 0 for background color
47    pls_.scolbga(255,255,255,0);
48    pls_.setopt("geometry", "600x500");
49    pls_.init();
50    pls_.adv(0);
51    pls_.vsta();
52    pls_.syax(6,0);
53  }
54#else
55{}
56#endif
57
58
59  Graph::~Graph(void)
60  {
61    print_legend();
62  }
63
64
65  bool Graph::date_xticks(void)
66  {
67    return xticks_.size() != 0;
68  }
69
70
71  void Graph::current_color(const legend_data& legend)
72  {
73    // we use color map 0 position 1 for current color
74#ifdef HAVE_PLPLOT
75    pls_.scol0a(1,legend.r,legend.g,legend.b,1.0);
76#endif
77  }
78
79
80  void Graph::current_color(unsigned char r, unsigned char g, unsigned char b)
81  {
82    // we use color map 0 position 1 for current color
83#ifdef HAVE_PLPLOT
84    pls_.scol0a(1,r,g,b,1.0);
85#endif
86  }
87
88
89  void Graph::plot(const SumVector& y, const std::string& label,
90                   unsigned int lines)
91  {
92#ifdef HAVE_PLPLOT
93    if (!plots_) {
94      assert(!date_xticks() || rev_min_<xticks_.size());
95      assert(!date_xticks() || xticks_[rev_min_]);
96      xmin_= date_xticks() ? xticks_[rev_min_] : 0;
97      xmax_= date_xticks() ? xticks_.back() : y.size();
98      xrange_=xmax_-xmin_;
99      yrange_=ymax_-ymin_;
100      pls_.wind(xmin_, xmax_, ymin_, ymax_);
101
102      // draw plot frame, x and y ticks only for the first plot
103      pls_.scol0a(2,0,0,0,1.0);
104      pls_.col0(2);
105
106      std::string xopt("bcnstv");
107      if (date_xticks()) {
108        pls_.timefmt(timeformat_.c_str());
109        xopt="bcnstd";
110      }
111
112      unsigned int ytickspacing=tick_spacing(yrange_);
113      unsigned int xtickspacing=tick_spacing(xrange_);
114      pls_.box(xopt.c_str(), xtickspacing, 1, "bcnstv", ytickspacing, 2);
115      pls_.lab("Date", "Number of lines", title_.c_str());
116    }
117    ++plots_;
118
119    pls_.col0(1);
120
121    SumVector::const_iterator iter = y.begin();
122    svn_revnum_t x0=rev_min_;
123    PLFLT y0=0;
124    for (; iter!=y.end(); ++iter) {
125      staircase(x0, y0, iter->first, iter->second);
126      x0 = iter->first;
127      y0 = iter->second;
128    }
129    staircase(x0, y0, y.size()-1, y0);
130
131    legend_data legend;
132    legend.label=label;
133    legend.lines=lines;
134    pls_.gcol0(1,legend.r,legend.g,legend.b);
135    legend_.push_back(legend);
136#endif
137  }
138
139
140  void Graph::print_legend(void)
141  {
142#ifdef HAVE_PLPLOT
143    PLFLT line_length=0.05*xrange_;
144    PLFLT x=xmin_+1.7*line_length;
145    unsigned char characteristic=log10(ymax_);
146    PLFLT legend_lines_length=0.016*xrange_*(characteristic+1);
147    PLFLT dx=0.005*xrange_;
148    PLFLT dy=0.003*yrange_;
149    unsigned int row=0;
150    std::reverse(legend_.begin(), legend_.end());
151    for (std::vector<legend_data>::const_iterator i=legend_.begin();
152         i!=legend_.end(); i++, ++row) {
153      PLFLT y=(0.95-0.04*row)*yrange_;
154      current_color(*i);
155      pls_.col0(1);
156      pls_.join(x-line_length, y-dy, x, y-dy);
157      std::stringstream ss;
158      ss << i->lines;
159      pls_.col0(2);
160      pls_.ptex(x+legend_lines_length+dx*2, y, 0, 0, 0, i->label.c_str());
161      pls_.ptex(x+legend_lines_length+dx  , y, 0, 0, 1, ss.str().c_str());
162    }
163#endif
164  }
165
166
167  void Graph::rev_min(svn_revnum_t rev)
168  {
169    rev_min_ = rev;
170  }
171
172
173  void Graph::set_dates(const std::vector<time_t>& date)
174  {
175    xticks_=date;
176  }
177
178
179  void Graph::staircase(svn_revnum_t rev0, PLFLT y0, 
180                        svn_revnum_t rev1, PLFLT y1)
181  {
182    PLFLT x0 = rev0;
183    PLFLT x1 = rev1;
184    if (date_xticks()) {
185      assert(rev0<xticks_.size());
186      assert(xticks_[rev0]);
187      x0 = xticks_[rev0];
188      assert(rev1<xticks_.size());
189      assert(xticks_[rev1]);
190      x1 = xticks_[rev1];
191    }
192#ifdef HAVE_PLPLOT
193    // join {x0,y0} with {x1,y1} via {x1,y0}
194    pls_.join(x0,y0,x1,y0);
195    pls_.join(x1,y0,x1,y1);
196#endif
197  }
198
199
200  unsigned int Graph::tick_spacing(const double range) const
201  {
202    double frac=range/5;
203    unsigned char characteristic= static_cast<unsigned char>(std::log10(frac));
204    unsigned int power=static_cast<unsigned int>(std::pow(10.0, characteristic));
205    unsigned char msn=static_cast<unsigned char>(frac/power);
206    return power*msn;
207  }
208
209
210  void Graph::timeformat(const std::string& format)
211  {
212    timeformat_=format;
213  }
214
215
216  const std::vector<time_t>& Graph::xticks(void)
217  {
218    return xticks_;
219  }
220
221
222  double Graph::ymax(double ymax)
223  {
224    return ymax_=ymax;
225  }
226
227}} // end of namespace svndigest and namespace theplu
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