Drawing on QWidget - strech & resize

[kemp]

Thanks for your help. Now the rectangle is in the middle, but when i resize the
window the rectangle also gets deformed, but i want to keep the ratio between
the width() and height() always the same and centered. If i use the set window
my drawing is deformed and if i use:

int side = qMin(width(), height());
painter.translate(width() / 2, height() / 2);
painter.scale(side / 200.0, side / 200.0);

int side = qMin(width(), height());
painter.translate(width() / 2, height() / 2);
painter.scale(side / 200.0, side / 200.0);

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in my code, the drawing dissapear and without setWindow the ratio is correct but
the drawing is always in lower right corner.