Hi,
I have ubuntu 14.04 64bit (qwt 6.0.0 and qt 4.8.6)

I have to use event_filter example as starting point for a project.
I run it but it has an unexpected behaviour. When I drag a point of a curve it replots some points, but doesn't replots the curve:
event_filter_1.png

Any event I trigger on the axis (to change background color or add a curve) or on the window (minimizing and restoring it) will result in a correct redraw:
event_filter_2.png

Is this the right behaviour? Or is it a bug? How to correct it?

best regards
max