src/statshourcongestion.cpp

   1 #include <QDebug>
   2
   3 #include "statshourcongestion.h"
   4
   5 #define LOWESTHOUR (7)
   6 #define HIGHESTHOUR (21)
   7
   8 StatsHourCongestion::StatsHourCongestion(JourneyModel * journeys) :
   9     journeys(journeys)
  10 {
  11     title = "Congestion by hour (cycles per hour)";
  12     units = "";
  13
  14     labels.clear();
  15     for (int hour = LOWESTHOUR; hour <= HIGHESTHOUR; hour++) {
  16         labels << QString::number(hour);
  17     }
  18 }
  19
  20 void StatsHourCongestion::update() {
  21     double passed[24];
  22     unsigned int count[24];
  23     int pos;
  24
  25     qDebug() << "Calculating values";
  26     values.clear();
  27
  28     for (pos = 0; pos < 24; pos++) {
  29         passed[pos] = 0.0;
  30         count[pos] = 0;
  31     }
  32
  33     foreach (Journey const &journey, journeys->getData()) {
  34         QTime time = journey.getStartTime();
  35         int hour = time.hour();
  36         int startmin = time.minute();
  37         int duration = (journey.getDuration() / 60);
  38         int remaining = duration;
  39
  40         while (remaining > 0) {
  41             // toadd is always greater than 0, so the loop is guaranteed to exit
  42             unsigned int toadd = (startmin + remaining) < 60 ? remaining : 60 - startmin;
  43             passed[hour] += (double)toadd * ((double)(journey.getOvertook() + journey.getOvertakenBy()) / duration);
  44             count[hour] += toadd;
  45             remaining -= toadd;
  46             startmin = 0;
  47
  48             hour = (hour + 1) % 24;
  49         }
  50     }
  51
  52     maxval = 0.0;
  53     for (pos = LOWESTHOUR; pos <= HIGHESTHOUR; pos++) {
  54         float result = 0.0f;
  55         if (count[pos] > 0) {
  56             result = (float)(60.0 * passed[pos] / (double)count[pos]);
  57         }
  58         if (result > maxval) {
  59             maxval = result;
  60         }
  61         values << result;
  62     }
  63
  64     step = (maxval > 5.0) ? qRound(maxval / 5.0) : (maxval / 5.0);
  65
  66     qDebug() << "Calculated values";
  67 }