'Problem with QWidget borders in a QGridLayout

I have a QGridLayout filled with my custom QWidgets (I'll call them CellWidgets). I want to display a grid between all of the CellWidgets so the columns and rows are clearly visible.

Obviously this isn't done from QGridLayout, as that is simply a holder for widgets that draw themseleves. I made my CellWidgets draw a border by over-riding the paintEvent function like so:

QPainter Painter(this);
Painter.setPen(QPen(QBrush(Qt::white), 2));
Painter.setBrush(Qt::black);
Painter.drawRect(0, 0, width(), height());

The QGridLayout spacing is set to 0, however, when it is drawn the grid border has a single width around the edges and double that width between cells, as the border of the cell is effectively being displayed twice.

Any clean way to solve/avoid this problem?

qtqt4


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