It is probably enough to implement:
In Qwt 6.0 it gets called automatically when using Qwt from SVN trunk only when the QwtPlotItem::ScaleInterest flag is set.Qt Code:
{ // rect is the visible area in scale coordinates - the scales the corresponding curve is attached to. ... }To copy to clipboard, switch view to plain text mode
HTH,
Uwe
PS: internally QwtSyntheticPointData uses this hook too
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