src/statshourjourneys.cpp

   1 #include <QDebug>
   2
   3 #include "statshourjourneys.h"
   4
   5 #define LOWESTHOUR (7)
   6 #define HIGHESTHOUR (21)
   7
   8 StatsHourJourneys::StatsHourJourneys(JourneyModel * journeys) :
   9     journeys(journeys)
  10 {
  11     title = "Journey proportions 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 StatsHourJourneys::update() {
  21     unsigned int minsperhour[24];
  22     quint64 totalmins;
  23     int pos;
  24
  25     qDebug() << "Calculating values";
  26     barvalues.clear();
  27
  28     for (pos = 0; pos < 24; pos++) {
  29         minsperhour[pos] = 0u;
  30     }
  31
  32     totalmins = 0u;
  33     foreach (Journey const &journey, journeys->getData()) {
  34         QTime time = journey.getStartTime();
  35         int hour = time.hour();
  36         int startmin = time.minute();
  37         int remaining = (journey.getDuration() / 60);
  38         totalmins += remaining;
  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             minsperhour[hour] += toadd;
  44             remaining -= toadd;
  45             startmin = 0;
  46
  47             hour = (hour + 1) % 24;
  48         }
  49     }
  50
  51     for (pos = LOWESTHOUR; pos <= HIGHESTHOUR; pos++) {
  52         float result = 0.0f;
  53         if (totalmins > 0) {
  54             result = ((double)minsperhour[pos] / (double)totalmins);
  55         }
  56         barvalues << result;
  57     }
  58
  59     qDebug() << "Calculated values";
  60 }