src/statshourcongestion.cpp

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