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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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3
stats/chartitem.h
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@ -89,7 +89,8 @@ class ChartTextItem : public ChartPixmapItem {
public:
ChartTextItem(StatsView &v, ChartZValue z, const QFont &f, const std::vector<QString> &text, bool center);
ChartTextItem(StatsView &v, ChartZValue z, const QFont &f, const QString &text);
void setColor(const QColor &color);
void setColor(const QColor &color); // Draw on transparent background
void setColor(const QColor &color, const QColor &background); // Fill rectangle with given background color
private:
QFont f;
double fontHeight;