It's probably not printing out anything because you're not flushing the output buffer. Try adding "<< std::endl" to the "NULL" and "NOT NULL" std::coutcout lines.
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Re: QGraphicsScene::update() has no effect
It's probably not printing out anything because you're not flushing the output buffer. Try adding "<< std::endl" to the "NULL" and "NOT NULL" std::coutcout lines.
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