[Qwt] selection of curve/plot/...

[packman2012]

Moderatorеs, can you move this thread to http://www.qtcentre.org/forums/23-Qwt ...

Hello.

I want to do smth like this:
http://softidle.ru/uploads/posts/201...ioedit_thm.jpg

i.e. I want to learn how I can do selection of some part of graphic(plot/curve, etc... )

Can you tell me how I can do this with help of Qwt?

Thank you for the attention, I hope that you help me with this and you understand what I want to do