want to create 3 triangle and widget them in QHVBoxLayout()

[houmingc]

why is my code not working?
want to create 3 triangle and widget them in QHVBoxLayout().

QRectF rect= QRectF(0,0,100,100);

QPainterPath path;
path.moveTo(rect.topLeft(),rect.left());
path.lineTo(rect.bottomLeft());
path.lineTo(rect.topRight());

QPainter painter;
painter.setPen(Qt:: NoPen);
painter.fillPath(path, QBrush(QColor("blue")) );

[Chris Kawa]

Your painter doesn't have anything to paint on. If the above code is inside an overriden paintEventthen it should be something like QPainter painter(this);.