How to replot efficientlyafter deleting a point

[abutter]

Hi there,

I checked the realtime example, It do some partial update when adding a new point. But how should I when deleting a point? Need to call replot always?

Thanks.

Yanan

[Uwe]

But how should I when deleting a point? Need to call replot always?

There is no erasing available, when drawing to a widget - all you can do is to redraw. But of course you are free to come up with something faster than doing a replot - if possible. F.e you could store the previous content in a pixmap.

But what can be done is very plot specific and there is no out of the box implementation provided by Qwt.