src/powergraph.cpp

   1 #include "data.h"
   2 #include "powergraph.h"
   3
   4
   5 PowerGraph::PowerGraph(QWidget *parent) : GraphTab(parent)
   6 {
   7         _units = Metric;
   8         _showTracks = true;
   9
  10         GraphView::setYUnits(tr("W"));
  11         setYLabel(tr("Power"));
  12
  13         setSliderPrecision(1);
  14 }
  15
  16 void PowerGraph::setInfo()
  17 {
  18         if (_showTracks) {
  19                 GraphView::addInfo(tr("Average"), QString::number(avg() * yScale()
  20                   + yOffset(), 'f', 1) + UNIT_SPACE + yUnits());
  21                 GraphView::addInfo(tr("Maximum"), QString::number(max() * yScale()
  22                   + yOffset(),  'f', 1) + UNIT_SPACE + yUnits());
  23         } else
  24                 clearInfo();
  25 }
  26
  27 void PowerGraph::loadData(const Data &data, const QList<PathItem *> &paths)
  28 {
  29         for (int i = 0; i < data.tracks().count(); i++) {
  30                 const Graph &graph = data.tracks().at(i)->power();
  31                 qreal sum = 0, w = 0;
  32
  33                 if (graph.size() < 2) {
  34                         skipColor();
  35                         continue;
  36                 }
  37
  38                 for (int j = 1; j < graph.size(); j++) {
  39                         qreal ds = graph.at(j).s() - graph.at(j-1).s();
  40                         sum += graph.at(j).y() * ds;
  41                         w += ds;
  42                 }
  43                 _avg.append(QPointF(data.tracks().at(i)->distance(), sum/w));
  44
  45                 GraphView::loadGraph(graph, paths.at(i));
  46         }
  47
  48         for (int i = 0; i < data.routes().count(); i++)
  49                 skipColor();
  50
  51         setInfo();
  52
  53         redraw();
  54 }
  55
  56 qreal PowerGraph::avg() const
  57 {
  58         qreal sum = 0, w = 0;
  59         QList<QPointF>::const_iterator it;
  60
  61         for (it = _avg.begin(); it != _avg.end(); it++) {
  62                 sum += it->y() * it->x();
  63                 w += it->x();
  64         }
  65
  66         return (sum / w);
  67 }
  68
  69 void PowerGraph::clear()
  70 {
  71         _avg.clear();
  72
  73         GraphView::clear();
  74 }
  75
  76 void PowerGraph::showTracks(bool show)
  77 {
  78         _showTracks = show;
  79
  80         showGraph(show);
  81         setInfo();
  82
  83         redraw();
  84 }