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statistics: add ticks at beginning and end of the axis

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The grid is based on the axis ticks. If labels in histogram
axes were skipped (because there are too many bins), it could
happen that the grid was incomplete, because the first and/or
last tick were missing. Add these explicitly.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2021-01-07 14:59:47 +01:00 committed by Dirk Hohndel
parent cad00032fc
commit 2a850025b2
1 changed files with 9 additions and 0 deletions
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9
stats/statsaxis.cpp
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@ -411,11 +411,20 @@ void HistogramAxis::updateLabels()
}
}
labels.reserve((bin_values.size() - first) / step + 1);
// Always add a tick at the beginning of the axis - this is
// important for the grid, which uses the ticks.
if (first != 0)
addTick(bin_values.front().value);
int last = first;
for (int i = first; i < (int)bin_values.size(); i += step) {
const auto &[name, value, recommended] = bin_values[i];
addLabel(name, value);
addTick(value);
last = i;
}
// Always add a tick at the end of the axis (see above).
if (last != (int)bin_values.size() - 1)
addTick(bin_values.back().value);
}
// Helper function to turn days since "Unix epoch" into a timestamp_t