src/statshourjourneys.cpp

   1 #include "statshourjourneys.h"
   2
   3 #define LOWESTHOUR (7)
   4 #define HIGHESTHOUR (21)
   5
   6 StatsHourJourneys::StatsHourJourneys(JourneyModel * journeys) :
   7     journeys(journeys)
   8 {
   9     title = "Journey proportion 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 StatsHourJourneys::update() {
  19     unsigned int minsperhour[24];
  20     quint64 totalmins;
  21     int pos;
  22
  23     barvalues.clear();
  24
  25     for (pos = 0; pos < 24; pos++) {
  26         minsperhour[pos] = 0u;
  27     }
  28
  29     totalmins = 0u;
  30     foreach (Journey const &journey, journeys->getData()) {
  31         QTime time = journey.getStartTime();
  32         int hour = time.hour();
  33         int startmin = time.minute();
  34         int remaining = (journey.getDuration() / 60);
  35         totalmins += remaining;
  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             minsperhour[hour] += toadd;
  41             remaining -= toadd;
  42             startmin = 0;
  43
  44             hour = (hour + 1) % 24;
  45         }
  46     }
  47
  48     for (pos = LOWESTHOUR; pos <= HIGHESTHOUR; pos++) {
  49         float result = 0.0f;
  50         if (totalmins > 0) {
  51             result = ((double)minsperhour[pos] / (double)totalmins);
  52         }
  53         barvalues << result;
  54     }
  55 }