[Interest] QSettings possible bug on Windows

[Alex Malyushytskyy]

Thanks Scott for advices,

-  10 times checked that there was no typo

qdesktopservices do not provide path to common application data folder,
only to user specific.
Reason I guess that there is no such concept on unix derived systems.

I finally did write an extension to it which on Windows returns value I am
looking for
basically it is call to SHGetSpecialFolderPath with CSIDL_COMMON_APPDATA
parameter.and on Linux returns results obtained with
QDesktopServices::DataLocation

This is supposed to be a right way to dt it anyway (besides extending
qdesktopservices which would be probably even better) ,
but it does not explain problem I see with QSettings

Regards,

Alex




On Mon, Sep 30, 2013 at 8:17 PM, Scott Aron Bloom <scott.bloom at onshorecs.com
> wrote:

>  Two things..****
>
> ** **
>
> **1)      **Try doing a foreach( const QString & child, reg.childKeys() )
> and see, maybe there is a typo you are missing****
>
> **2)      **Take a look at the Qt source code for
> qdesktopservices_win.cpp  It uses SHGetSpecialFolder to find the
> directories you are looking for.****
>
> Scott****
>
> ** **
>
> *From:* interest-bounces+scott.bloom=onshorecs.com at qt-project.org [mailto:
> interest-bounces+scott.bloom=onshorecs.com at qt-project.org] *On Behalf Of *Alex
> Malyushytskyy
> *Sent:* Monday, September 30, 2013 7:02 PM
> *To:* interest at qt-project.org
> *Subject:* Re: [Interest] QSettings possible bug on Windows****
>
> ** **
>
> Just want to add that key is found,****
>
>
> qDebug() << "child keys = " <<  reg.childKeys();****
>
> result in****
>
>
> child keys =  ("Common Administrative Tools", "Common AppData", "Common
> Desktop", "Common Documents", "Common Programs", "Common Start Menu",
> "Common Startup", "Common Templates", "CommonMusic", "CommonPictures",
> "CommonVideo", "OEM Links", "Personal")
>
> but value returned is empty string - different from visible in regedit ***
> *
>
> Alex****
>
> ** **
>
> On Mon, Sep 30, 2013 at 6:24 PM, Alex Malyushytskyy <alexmalvtk at gmail.com>
> wrote:****
>
>  I found a problem with QSettings when trying to read from registry.
> I am using  Qt 4.7.3 so I would appreciate if anybody can check with Qt 5
> at least. ****
>
> Problem:****
>
> QSettings fails to return specific key value (Common AppData) when read
> other keys at the same level just fine.****
>
> Key exists and verified with regedit.****
>
> Test case is below:****
>
>
> #include <QApplication>
> #include <QSettings>
> #include <QDebug>
>
> void ddd2();
>
> int main(int argc, char *argv[])
> {****
>
> // execute test and return****
>
>     QApplication a(argc, argv);****
>
>     ddd2();****
>
> ** **
>
>     return 0;****
>
> }
>
> void ddd2()
> {
>     QSettings
> reg("HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell
> Folders",
>         QSettings::NativeFormat);
>     QString key;
>     QString val;
>
>     key = QString("Common AppData");
>     val = QString ( reg.value(key).toString());
>     qDebug() << "key: " << key << " value: " << val;
>
>     key = QString("Common Desktop");
>     val = QString ( reg.value(key).toString());
>     qDebug() << "key: " << key << " value: " << val;
>
>     key = QString("Common Documents");
>     val = QString ( reg.value(key).toString());
>     qDebug() << "key: " << key << " value: " << val;
> }****
>
> Output:****
>
>
> key:  "Common AppData"  value:  ""
> key:  "Common Desktop"  value:  "C:\Users\Public\Desktop"
> key:  "Common Documents"  value:  "C:\Users\Public\Documents" ****
>
> Expected
>  * WinXP: "c:\Documents and Settings\All Users\Application Data"
>  * WinV/7/8: "c:\ProgramData"
>
> ****
>
> Regards,****
>
>    Alex****
>
>  ** **
>
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