why override paint just to drawPrimitive(PE_Widget)?

[nroberts]

Why would someone override paintEvent to just do this:

QStyleOption opt;
    opt.init(this);
    QPainter p(this);
    style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);

QStyleOption opt;
    opt.init(this);
    QPainter p(this);
    style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);

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[SixDegrees]

Because paintEvent gets called whenever painting - or re-painting - is required. Stick an output statement in paintEvent and start dragging windows partially offscreen, obscuring them with other windows, hiding and showing them and other activities; watch your console fill up with output.