[Interest] QSettings possible bug on Windows

[Alex Malyushytskyy]

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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