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67 lines
1.2 KiB
C++
67 lines
1.2 KiB
C++
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#include <cmath>
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#include <QObject>
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#include "misc.h"
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double niceNum(double x, int round)
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{
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int expv;
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double f;
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double nf;
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expv = (int)floor(log10(x));
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f = x / pow(10.0, expv);
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if (round) {
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if (f < 1.5)
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nf = 1.0;
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else if (f < 3.0)
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nf = 2.0;
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else if (f < 7.0)
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nf = 5.0;
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else
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nf = 10.0;
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} else {
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if (f <= 1.0)
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nf = 1.0;
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else if (f <= 2.0)
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nf = 2.0;
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else if (f <= 5.0)
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nf = 5.0;
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else
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nf = 10.0;
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}
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return nf * pow(10.0, expv);
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}
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QString timeSpan(qreal time)
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{
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unsigned h, m, s;
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h = time / 3600;
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m = (time - (h * 3600)) / 60;
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s = time - (h * 3600) - (m * 60);
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return QString("%1:%2:%3").arg(h).arg(m, 2, 10, QChar('0'))
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.arg(s, 2, 10, QChar('0'));
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}
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QString distance(qreal value, Units units)
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{
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if (units == Imperial) {
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if (value < MIINM)
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return QString::number(value * M2FT, 'f', 0)
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+ UNIT_SPACE + QObject::tr("ft");
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else
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return QString::number(value * M2MI, 'f', 1)
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+ UNIT_SPACE + QObject::tr("mi");
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} else {
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if (value < KMINM)
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return QString::number(value, 'f', 0) + UNIT_SPACE
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+ QObject::tr("m");
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else
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return QString::number(value * M2KM, 'f', 1)
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+ UNIT_SPACE + QObject::tr("km");
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}
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}
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