QSettings not bound under Linux

• Mar 4, 2010 - 23:55
Type
Plugins
Severity
S4 - Minor
Status
closed
Project
MuseScore

The Qt QSettings class is not bound under Linux, while it is usable under Windows. Tested with rev. 2825.

STR: run the attached test plugin both under Windows and under Linux: in the first case a testQSettings.ini file is created in the same folder of the plugin; in the second case, an error is issued.

Notes:
This may apply to other Qt classes as well, but of course I did not test each of them!
My Linux: Ubuntu 9.04 with Qt SDK 2010.01. Source has been compiled from Qt Creator using its CMake interface.

Attachment Size
testQSettings.zip 973 bytes

Comments

• Mar 5, 2010 - 04:09

It does not work (or even give an error) on Windows 7 if MuseScore is installed to a protected location (such as Program Files). It works as expected on Windows 7 if I run MuseScore from an unprotected location such as My Documents.

What does the error say for Linux?

(Tested using r. 2834, self-built).

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• Mar 5, 2010 - 20:20

The error message under Ubuntu is:

"Reference Error: Can't find variable 'QSettings'"

So, it is definitely related with coding, while your issue with Windows 7 is related with authorizations at OS level: QSettings is found and an instance created and called, but when it tries to create the INI file in a protected location the OS blocks it (presumably the g_settings.setValue() statement in the plugin code returns false, but I didn't bother to check it).

UPDATE:
While checking other plugins, I found that NO Qt class is accessible; as it seems I am the only one to experience such a big problem, it has to be related to the way I compiled the code, opening the CMakeLists.txt file with Qt Creator to create a project out of it (the procedure which is suggested for Windows). Presumably, Ubuntu does not like it.

I'll wait a little for any suggestion and then I'll close the issue.

Thanks,
M.

Reply

• Mar 6, 2010 - 10:36

The Qt binding is part of MuseScore code. You can found it in the scriptgen directory.
During your compilation, check that the file in this directory are compiled.

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