Qt menu looks "old" on Windows

[tontsa28]

I have compiled a 64-bit version of an originally 32-bit program (SpeedCrunch if it matters). The program works completely fine, however there is something weird going on with the menu (don't mind the menu texts, they are in Finnish):

This certainly doesn't look like it should, as this looks much "older" than what it should look like (below):

I think I have all required DLLs, since the program works fine otherwise. What could be the problem here? I'm very new to Qt so I have no idea what to do.

[Christian Ehrlicher]

@tontsa28 said in Qt menu looks "old" on Windows:

I think I have all required DLLs

You don't.
How did you deploy your app? You're most likely missing the windowsvista style plugin.

[tontsa28]

Thanks! I got it working by creating a styles directory and putting the windowsvista plugin there. I still wonder how the style worked in the 32-bit SpeedCrunch since the DLL was not present...?

[JKSH]

@tontsa28 said in Qt menu looks "old" on Windows:

I still wonder how the style worked in the 32-bit SpeedCrunch since the DLL was not present...?

If you use a tool like ProcessExplorer [1] or ListDLLs [2] to see what DLLs are loaded by your app, you might find that it actually picked up a copy of the the plugin from somewhere else.

[1] https://docs.microsoft.com/en-us/sysinternals/downloads/process-explorer
[2] https://docs.microsoft.com/en-us/sysinternals/downloads/listdlls

[Christian Ehrlicher]

@tontsa28 said in Qt menu looks "old" on Windows:

I got it working by creating a styles directory and putting the windowsvista plugin there

You should use windeployqt - it copies all which is needed for you

[tontsa28]

I took a look with the ListDLLs tool but couldn't actually find the plugin being used by the 32-bit version, maybe some other DLL is handling that? Anyway, my problem is now solved so I'll mark this topic as solved.