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57 lines
1.0 KiB
C++
57 lines
1.0 KiB
C++
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#include "speedgraph.h"
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SpeedGraph::SpeedGraph()
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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(0.001);
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Graph::setYScale(3.6);
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}
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void SpeedGraph::loadData(const QVector<QPointF> &data)
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{
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qreal max = 0, sum = 0, avg, distance, w;
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distance = (data.at(data.size() - 1).x() - data.at(0).x());
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for (int i = 1; i < data.size(); i++) {
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qreal val = data.at(i).y();
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sum += val;
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if (val > max)
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max = val;
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}
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avg = sum / data.size();
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_avg.append(QPointF(avg, distance));
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sum = 0; w = 0;
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for (QList<QPointF>::iterator it = _avg.begin(); it != _avg.end(); it++) {
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sum += it->x() * it->y();
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w += it->y();
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}
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avg = sum / w;
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_max = qMax(_max, max);
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addInfo(tr("Average"), QString::number(avg * _yScale, 'f', 1)
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+ " " + _yUnits);
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addInfo(tr("Maximum"), QString::number(_max * _yScale, 'f', 1)
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+ " " + _yUnits);
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Graph::loadData(data);
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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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