[Development] Differences: QDesktopServices vs QStandardPaths

[Mark]

On Tue, Jun 25, 2013 at 11:27 PM, Chris W
<chrisw.qtdevel at psychogeeks.com> wrote:
> Hello,
>
> Were the following differences between the paths returned by Qt 4.8
> QDesktopServices and 5.1 QStandardPaths intentional or bug-worthy? (They
> are annoying either way)
>
> #include <QtCore>
> #include <QDesktopServices>
> int main(int argc, char **argv)
> {
> QCoreApplication app(argc, argv);
> app.setOrganizationName("ExampleOrg");
> app.setOrganizationDomain("example.com.au");
> app.setApplicationName("ExampleApp");
> #if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
> QStringList paths =
> QStandardPaths::standardLocations(QStandardPaths::DataLocation);
> #else
> QString paths =
> QDesktopServices::storageLocation(QDesktopServices::DataLocation);
> #endif
> qDebug() << qVersion() << paths;
> return 0;
> }
>
> Outputs under different Qt versions on 64-bit Linux:
> 4.8.4 "/home/chrisw/.local/share/data/ExampleOrg/ExampleApp"
> 5.1.0 ("/home/chrisw/.local/share/ExampleOrg/ExampleApp",
> "/usr/share/ExampleOrg/ExampleApp",
> "/usr/local/share/ExampleOrg/ExampleApp",
> "/usr/share/ExampleOrg/ExampleApp")
>
> Note the extra “data” directory in the Qt4 path vs. the first directory
> in Qt5. XDG_DATA_HOME is not set.
>
> This means ported Qt4-based code, when built with Qt5, looks in the
> wrong location for data that was previously installed/generated in the
> Qt4 DataLocation on deployed machines. As sierdzio points out here
> (http://qt-project.org/forums/viewthread/29223/) this is strictly
> neither a regression in QDesktopServices nor a bug in QStandardPaths.
> Aligning it now would be a regression in Qt5.
>
> Unless there's something I am missing, I will work around it by moving
> the data using an installer script, using the deprecated function in
> QDesktopServices, or coding alternate paths into the
> application startup.
>
> --
> Chris Williams
>
> Life would be much easier if I had the source code.  Anon.
>
>
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Since you haven't received a single reply yet, adding David Faure (the
author of this class) in the CC.
I recommend making a bug report: bugreports.qt-project.org