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Diffstat (limited to 'src/charts/axis/chartaxiselement.cpp')
| -rw-r--r-- | src/charts/axis/chartaxiselement.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/charts/axis/chartaxiselement.cpp b/src/charts/axis/chartaxiselement.cpp index 72ea2ec2..f6ff050a 100644 --- a/src/charts/axis/chartaxiselement.cpp +++ b/src/charts/axis/chartaxiselement.cpp @@ -419,7 +419,11 @@ QStringList ChartAxisElement::createValueLabels(qreal min, qreal max, int ticks, return labels; if (format.isEmpty()) { - int n = qMax(int(-qFloor(std::log10((max - min) / (ticks - 1)))), 0) + 1; + // Calculate how many decimal digits are needed to show difference between ticks, + // for example tick marks 1.002 and 1.003 have a difference of 0.001 and need 3 decimals. + // For differences >= 1 (positive log10) use always 1 decimal. + double l10 = std::log10((max - min) / (ticks - 1)); + int n = qMax(int(-qFloor(l10)), 0) + 1; if (tickType == QValueAxis::TicksFixed) { for (int i = 0; i < ticks; i++) { qreal value = min + (i * (max - min) / (ticks - 1)); |