Hi all,
I am concerning about optimization when redrawing of qwt plot.
A Qwtplot has a QwtPlotItem attached. When there is new data, calling plot.replot() will redraw everything including QwtScale. Is there anyway to call QwtPlotItem to update only when there is new data to avoid the rest to update (because my QwtScale is static all the time). Caching pixmap is one solution but it is a redraw anyway.
This can be apply to barchart, xy plot, qwtDial, etc.
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