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https://github.com/tumic0/GPXSee.git
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86 lines
1.5 KiB
C++
86 lines
1.5 KiB
C++
#include "config.h"
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#include "speedgraph.h"
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SpeedGraph::SpeedGraph(QWidget *parent) : Graph(parent)
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{
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_max = 0;
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Graph::setXLabel(tr("Distance"));
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Graph::setYLabel(tr("Speed"));
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Graph::setXUnits(tr("km"));
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Graph::setYUnits(tr("km/h"));
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Graph::setXScale(M2KM);
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Graph::setYScale(MS2KMH);
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Graph::setPrecision(1);
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}
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void SpeedGraph::addInfo()
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{
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Graph::addInfo(tr("Average"), QString::number(avg() * _yScale, 'f', 1)
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+ THIN_SPACE + _yUnits);
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Graph::addInfo(tr("Maximum"), QString::number(_max * _yScale, 'f', 1)
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+ THIN_SPACE + _yUnits);
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}
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void SpeedGraph::loadGPX(const GPX &gpx)
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{
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QVector<QPointF> data;
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qreal max = 0;
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gpx.speedGraph(data);
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if (data.isEmpty())
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return;
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_avg.append(QPointF(gpx.distance(), gpx.distance() / gpx.time()));
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for (int i = 0; i < data.size(); i++)
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max = qMax(max, data.at(i).y());
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_max = qMax(_max, max);
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addInfo();
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loadData(data);
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}
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qreal SpeedGraph::avg() const
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{
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qreal sum = 0, w = 0;
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QList<QPointF>::const_iterator it;
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for (it = _avg.begin(); it != _avg.end(); it++) {
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sum += it->y() * it->x();
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w += it->x();
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}
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return (sum / w);
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}
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void SpeedGraph::clear()
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{
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_max = 0;
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_avg.clear();
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Graph::clear();
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}
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void SpeedGraph::setUnits(enum Units units)
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{
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if (units == Metric) {
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Graph::setXUnits(tr("km"));
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Graph::setYUnits(tr("km/h"));
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Graph::setXScale(M2KM);
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Graph::setYScale(MS2KMH);
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} else {
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Graph::setXUnits(tr("mi"));
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Graph::setYUnits(tr("mi/h"));
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Graph::setXScale(M2MI);
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Graph::setYScale(MS2MIH);
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}
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clearInfo();
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addInfo();
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redraw();
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}
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