[Interest] using QSetting when host application is using it as well

[Frank Rueter | OHUfx]

Thanks.
I'm stuck with QT 4.8.5 at the moment so QStandardPaths is not 
available, but I could use QDesktopServices instead, e.g.:

QtGui.QDesktopServices.storageLocation(QtGui.QDesktopServices.HomeLocation)


What would be the difference to os.path.expanduser('~') though?

Cheers,
frank



On 2/02/17 8:19 PM, Constantin Makshin wrote:
> Hi Frank.
>
> Looks like the host application uses QSettings::setPath()
> (http://doc.qt.io/qt-5/qsettings.html#setPath) to enforce a specific
> directory for configuration files. Calling that method from your code is
> obviously a bad idea (high risk of screwing up the host application), so
> your "fallback" is the easiest solution. It'll be even better if you
> replace the "~/.config" part with proper runtime detection of user
> settings' directory (e.g.
> QStandardPaths::writableLocation(QStandardPaths::GenericConfigLocation)).
>
> On 02/02/2017 08:35 AM, Frank Rueter | OHUfx wrote:
>> In the meantime I am falling back on using this:
>>       os.path.expanduser('~/.config/companyName/appName')
>>
>> While this does not give me the OS' native support directory for the
>> respective user at least it's consistent :)
>>
>> I'd still be interested in a QSettings solution though.
>>
>> Cheers,
>> frank
>>
>> On 2/02/17 4:51 PM, Frank Rueter | OHUfx wrote:
>>> Hi all,
>>>
>>> I have been using QSettings for reading/writing user settings.
>>> All works well until I run my (PySide) application inside a host
>>> application that is also written in QT, and which also uses the
>>> QSettings object.
>>>
>>> I am now struggling to understand how I can properly differentiate
>>> between the host application's settings instance and my own.
>>> In particular, I need to use QSettings().fileName() to determine the
>>> correct support path for my ini files for each platform.
>>> But this line gives me different values inside and outside the host
>>> application:
>>>
>>>      QtCore.QSettings(QtCore.QSettings.IniFormat,
>>>      QtCore.QSettings.UserScope, "companyName", "appName").fileName()
>>>
>>> E.g.:
>>> Outside the host application I get what I want:
>>>
>>>      /Users/frank/.config/companyName/appName.ini
>>>
>>> But the return value is a completely different inside the host app and
>>> actually points to the host app's internal file structure.
>>> Fair enough too I guess.
>>>
>>> So my question is:
>>> How can I use QSettings to determine support paths etc while making
>>> sure that I don't accidentally mess with the host applications QSettings?
>>>
>>> Cheers,
>>> frank
>
>
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