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statistics: render bar and pie labels onto fill color

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The labels in bar an pie charts are realized as individual
QSG pixmap nodes with an alpha channel. Sadly, rendering
bright labels onto a transparent background gives very
ugly artifacts.

As a stop gap measure, until the problem is understood,
render on a background with the color of the pie slice
or bar.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2021-01-19 16:09:56 +01:00 • committed by bstoeger
parent 2e2019dea7
commit 4f58e9aa62
5 changed files with 29 additions and 19 deletions
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8
stats/pieseries.cpp
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@ -65,11 +65,11 @@ void PieSeries::Item::updatePositions(const QPointF &center, double radius)
void PieSeries::Item::highlight(ChartPieItem &item, int bin_nr, bool highlight, int numBins)
{
QColor fill = highlight ? highlightedColor : binColor(bin_nr, numBins);
QColor border = highlight ? highlightedBorderColor : ::borderColor;
if (innerLabel)
innerLabel->setColor(highlight ? darkLabelColor : labelColor(bin_nr, numBins));
item.drawSegment(angleFrom, angleTo,
highlight ? highlightedColor : binColor(bin_nr, numBins),
highlight ? highlightedBorderColor : ::borderColor);
innerLabel->setColor(highlight ? darkLabelColor : labelColor(bin_nr, numBins), fill);
item.drawSegment(angleFrom, angleTo, fill, border);
}
PieSeries::PieSeries(StatsView &view, StatsAxis *xAxis, StatsAxis *yAxis, const QString &categoryName,