// draw the polygon

// points needed to draw hexagon: (1,0), (2,0), (3,1), (2,2), (1,2), (0,1)

QVector<QPointF> hexPoints;

hexPoints << QPointF(1,0) << QPointF(2,0) << QPointF(3,1) << QPointF(2,2)

<< QPointF(1,2) << QPointF(0,1);

// scale the points

int SCALE_BY = 40;

for (size_t i = 0, n = hexPoints.size(); i < n; ++i){

hexPoints[i] = hexPoints[i] * SCALE_BY;

}

// create a polygon with the scaled points

QPolygonF hexagon(hexPoints);

// draw the poly

setPolygon(hexagon);