Rotation problem trying to draw a compass widget

[jacek]

I think I must code something like this :
...
but how to determine x and y ?

Try:

int x = m_pBackground->width() / 2;  // or width() if it's the same
int y = m_pBackground->height() / 2;
 
painter.drawPixmap(0, 0, *m_pBackground);
 
painter.translate(-x, -y);
painter.rotate(m_dAngle);
painter.translate(x, y);
 
painter.drawPixmap(0, 0, *m_pForeground);

int x = m_pBackground->width() / 2;  // or width() if it's the same
int y = m_pBackground->height() / 2;

painter.drawPixmap(0, 0, *m_pBackground);

painter.translate(-x, -y);
painter.rotate(m_dAngle);
painter.translate(x, y);

painter.drawPixmap(0, 0, *m_pForeground);

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[yellowmat]

It works fine.

Thanks