Qt output too verbose

enutt

Hi there,

How can I adjust the verbosity of applications that use Qt? I'm using the Qt installed by package manager in Ubuntu 12.04 lts. For instance, all my applications print stuff to the terminal:

@
Got bus address: "unix:abstract=/tmp/dbus-uYtYuIHkwF,guid=bf09af5765943413637ce5a500000313"
Connected to accessibility bus at: "unix:abstract=/tmp/dbus-uYtYuIHkwF,guid=bf09af5765943413637ce5a500000313"
Registered DEC: true
Registered event listener change listener: true
@

And using ui features causes more stuff to print:

@
QSpiAccessible::accessibleEvent not handled: "6" obj: QMenu(0x10902c0, name = "menuFile") "menuFile"
QSpiAccessible::accessibleEvent not handled: "7" obj: QMenu(0x10902c0, name = "menuFile") "menuFile"
@

Is there a way to disable this log?

Thanks.

MuldeR

Install your own "dummy" message handler:

@void myMessageOutput(QtMsgType type, const char *msg)
{
/do nothing, i.e. discard message completely/
}

int main(int argc, char **argv)
{
qInstallMsgHandler(myMessageOutput);

/* ... */

}@

--

See also:
http://qt-project.org/doc/qt-4.8/qtglobal.html#qInstallMsgHandler

enutt

Thanks for the answer! Although, I don't understand why this is necessary. When running the same application on two difference machines, only one of them prints messages from Qt in such a verbose way. Why is this?

MuldeR

If you don't install your own message handler, the default one writes the output the STDOUT stream. On Linux, if you run a GUI application from the terminal, the STDOUT becomes visible there. If you run the GUI application without a terminal (e.g. from Nautilus) you simply don't see the STDOUT anywhere (it probably goes to /dev/null). And on Windows, the STDOUT of GUI applications is discarded anyway, even if you run them from a console.