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Fixed rendering of translucent CSS borders to prevent visible overlap 

This fixes the rendering of translucent borders on CSS-styled widgets to
prevent visible overlapping at the corners. This is done by using a
miter joint (45 degree angle) if either of the adjacent edges are
translucent. Previously, adjacent edges would be drawn at full length
and overlap at the corners if both edges are BorderStyle_Solid and have
identical QBrush objects. This works if both QBrush objects are opaque
but causes visible overlap if one or both of them are translucent.

Change-Id: I99d46c8634cb314e642c635439ed2f7819fcba6a
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
bb10
Brad Stanton 2016-01-25 13:00:22 -05:00
parent c5e44920ba
commit 1ac6644dda
1 changed files with 3 additions and 1 deletions
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4
src/gui/painting/qcssutil.cpp
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@ -337,8 +337,10 @@ static bool paintsOver(const QCss::BorderStyle *styles, const QBrush *colors, QC
if (s2 == BorderStyle_None || colors[e2] == Qt::transparent)
return true;
if ((s1 == BorderStyle_Solid && s2 == BorderStyle_Solid) && (colors[e1] == colors[e2]))
if ((s1 == BorderStyle_Solid && s2 == BorderStyle_Solid) && (colors[e1] == colors[e2])
&& colors[e1].isOpaque()) {
return true;
}
return false;
}