Mouse Interactive Gantt Chart in Qt

Hi,

Have anyone tried to make a mouse interactive gantt chart in qt?
I succeeded to make chart with Qwt already to display , but now I need to make a Timeline Project ( Gantt Chart ) with mouse interaction, so I can set it just like a project chronogram.

Below is basic what I'm looking for:
But, instead of months I want to display day times,for example 00:00 to 23:59 of current day.
http://addictedtor.free.fr/graphique...s/graph_74.png

I know it sounds a little bit hard to understand, but any ideas how I can make this happen?
Thank you all.

Did you get anywhere on this one ?
Need something similar.
Time on X-axis in nanoseconds, Y-axis different horizontal 'lines' for each task being run.