Root and Qt4 : Histogram overlaping/refresh

[cederik]

Hi All,
I have made a TQtWidget implementation all over Qt4.8.5. When I move the histogram inside the QtWidget window or try yo make zoom{in,out} etc it preservers the previous image. Here’s an example.

do you know how to solve this issue?

Best regards

Cederik

[system]

Ehh, This is the known issue (since ROOT 5.32 or so).

Qapplication, TQtWidget and histogram drawing

Hi everybody, I’m asking for help because I’m writing an acquisition program that controls some digitizers, and I need to show and update a couple of histograms while the data keeps coming. The problem is that I can not have a reliable update of the histograms, they are all stacked and trasparent (N histos for N seconds, all visible) or they have a black background that hides axes. The problem is similar as the one discussed here Test other language but the workaround described there doesn’t w…

[cederik]

[quote=“fine”]Ehh, This is the known issue (since ROOT 5.32 or so).
https://root-forum.cern.ch/t/qapplication-tqtwidget-and-histogram-drawing/17093/1[/quote]

Oops, sorry for the duplicate post… I will check it…