how to speed up the replot?

[rambo83]

Finally I have found out what was the reason for very slow plot behavior: I have set the flag

this->setAutoReplot(true);

this->setAutoReplot(true);

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for the QwtPlot and this was obviosly the reason for the slow replot, because after I deleted this line, the replot last far less than 1 second (in contrast to 4 seconds before). It is very fast now. Also the dragging of markers is now very fast and they are reploted all together at once, so that one cannot see the FOR loop, as it could be seen before.

best regards,

Vitali