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expand x or y range for charts if too small

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This commit is contained in:
Axel Kohlmeyer
2023-10-26 12:21:48 -04:00
parent 1e533d6496
commit 22c47a4e1b
1 changed files with 18 additions and 2 deletions
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20
tools/lammps-gui/chartviewer.cpp
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@ -31,6 +31,8 @@
#include <QTextStream>
#include <QVBoxLayout>
#include <cmath>
using namespace QtCharts;
ChartWindow::ChartWindow(const QString &_filename, QWidget *parent) :
@ -86,9 +88,9 @@ int ChartWindow::get_step() const
if (charts.size() > 0) {
auto *v = charts[0];
if (v)
return (int)v->get_step(v->get_count() - 1);
return (int)v->get_step(v->get_count() - 1);
else
return -1;
return -1;
} else {
return -1;
}
@ -320,6 +322,20 @@ void ChartViewer::reset_zoom()
ymin = qMin(ymin, p.y());
ymax = qMax(ymax, p.y());
}
// avoid (nearly) empty ranges
double deltax = fabs((xmax - xmin) / ((xmax == 0.0) ? 1.0 : xmax));
if (deltax < 1.0e-10) {
xmin -= 100.0*deltax;
xmax += 100.0*deltax;
}
double deltay = fabs((ymax - ymin) / ((ymax == 0.0) ? 1.0 : ymax));
if (deltay < 1.0e-10) {
ymin -= 100.0*deltay;
ymax += 100.0*deltay;
}
xaxis->setRange(xmin, xmax);
yaxis->setRange(ymin, ymax);
}