QwtPlotPicker with QwtPlotDirectPainter

Hi,everbody
Now,my plot show real time data with QwtPlotDirectPainter,but is bad with QwtPlotPicker,i know because replot() is not auto.
i know there is a QwtWidgetOverlay .
i find this :https://www.ohloh.net/p/qwt/commits/211937377
i hope this file, who has this file,can help me? Thanks



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