Hello,
I'm currently trying to investigate a painting problem within the
windowsvista / common style:
QImage img(7, 7, QImage::Format_ARGB32_Premultiplied);
QPolygon poly{ QPoint(1, 1), {5, 1}, {3, 5} };
QPainter p(&img);
p.setPen(Qt::NoPen);
p.setBrush(QColor(Qt::black));
p.drawPolygon(poly);
p.setPen(QColor(0, 255, 0, 128));
p.drawPoints(poly.data(), poly.size());
p.end();
img.save("output.png");
This code should draw a small down arrow (e.g. for a QPushButton with a
QMenu attached) and should look similar to this:
0123456
0
1 XXXXX
2 XXX
3 XXX
4 X
5 X
6
But the outcome is this:
0123456
0
1 XXXX
2 XX
3 XX
4
5
6
Setting a non-cosmetic pen at least result in painting of all three
corners but gives a non-symmetric triangle:
0123456
0
1 XXXXX
2 XXXX
3 XXX
4 XX
5 X
6
I've no idea how to draw this triangle the way I want (and everyone is
satisfied with the outcome). Do you have any ideas?
Thx,
Christian
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