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73 lines
1.4 KiB
C++
73 lines
1.4 KiB
C++
#include <float.h>
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#include "config.h"
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#include "elevationgraph.h"
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ElevationGraph::ElevationGraph(QWidget *parent) : Graph(parent)
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{
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_ascent = 0;
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_descent = 0;
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_max = -FLT_MAX;
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_min = FLT_MAX;
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Graph::setXLabel(tr("Distance"));
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Graph::setYLabel(tr("Elevation"));
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Graph::setXUnits(tr("km"));
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Graph::setYUnits(tr("m"));
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Graph::setXScale(0.001);
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}
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void ElevationGraph::loadGPX(const GPX &gpx)
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{
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QVector<QPointF> data;
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qreal min, max, ascent = 0, descent = 0;
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gpx.elevationGraph(data);
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if (data.isEmpty())
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return;
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min = max = data.at(0).y();
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for (int i = 1; i < data.size(); i++) {
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qreal cur = data.at(i).y();
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qreal prev = data.at(i-1).y();
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if (cur > prev)
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ascent += cur - prev;
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if (cur < prev)
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descent += prev - cur;
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if (cur > max)
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max = cur;
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if (cur < min)
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min = cur;
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}
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_ascent += ascent;
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_descent += descent;
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_max = qMax(_max, max);
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_min = qMin(_min, min);
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addInfo(tr("Ascent"), QString::number(_ascent, 'f', 0)
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+ THIN_SPACE + _yUnits);
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addInfo(tr("Descent"), QString::number(_descent, 'f', 0)
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+ THIN_SPACE + _yUnits);
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addInfo(tr("Maximum"), QString::number(_max, 'f', 0)
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+ THIN_SPACE + _yUnits);
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addInfo(tr("Minimum"), QString::number(_min, 'f', 0)
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+ THIN_SPACE + _yUnits);
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Graph::loadData(data);
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}
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void ElevationGraph::clear()
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{
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_ascent = 0;
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_descent = 0;
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_max = -FLT_MAX;
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_min = FLT_MAX;
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Graph::clear();
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}
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