QStackedWidget issue Windows 7 versus Windows10

Serge_4128

using Visual Studio 2019 v16.4.1 with QT 5.13.2
runnig on W7 and/or W10 with .net core and desktop runtime 3.1.0

defining QMainWindows as follow
QMainWindow
QWidget
Qlabel
Qstackedwidget
adding several widgets and keeping 0 as current

the last added widget is structured as :
QWidget
QLabel
QStackedWidget
adding several widgets and keeping 0 as current

On W10, at start, display shows the first stacked widget of main window, running Ok
on W7, a transparent windows on top of screen

Could it be due to directX version ?
max version 11 on W7 version 12 on Windows 10

mrjj

Hi and welcome to the forums
Does other Qt apps ( like any of the demos) run ok on that win 7 ?

Serge_4128

This desktop app has been developed with Visual Studio 2010 and QT 4.7.4 and run since 2012 onto W7 and then W10.
We decided to update development tools and ran onto W7 and W10.
A significant work has been achieved to move on Visual Studio 2019 and QT 5.13.2. Same app keeps on running on Windows 10 but fails on Windows 7 with this issue.
May we expect support from QT dev team on this ?

Serge_4128

Hello,
I am looking for a way to send you projet package. Could you point me out a link to upload a .zip file ?

SGaist

Hi,

If you need direct support from the Qt Teams, you'll have to contact the Qt Company. This forum is user oriented. One thing that you can do in between is check the bug report system to see if it's something known.

Another thing you can do is cut down your application to the minimum to see when it starts misbehaving.

mrjj

Hi
You can use Google driver or dropbox or
similar and get a share link and paste link here.

-on W7, a transparent windows on top of screen

Do you use openGl/QML or anything that would use directX or
similar ?