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statistics: replace PieSeries by QSG nodes

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Since there are no disk-segment QSG primitives (one could draw
a triangle fan, but that doesn't seem optimal), this draws
into a pixmap and blits that as a QSG node.

Since this is the only series without axis, it needs a function
that returns the size of the plot area. This didn't exist, so
add it.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2021-01-18 12:08:46 +01:00 • committed by bstoeger
parent b07a7fe5f1
commit b068b2b0e7
6 changed files with 92 additions and 50 deletions
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5
stats/statsview.cpp
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@ -187,6 +187,11 @@ QSizeF StatsView::size() const
return boundingRect().size();
}
QRectF StatsView::plotArea() const
{
return plotRect;
}
void StatsView::plotAreaChanged(const QSizeF &s)
{
// Make sure that image is at least one pixel wide / high, otherwise