[Development] QtDriveInfo module in Playground

André Somers andre at familiesomers.nl
Fri Mar 1 10:54:43 CET 2013

Op 1-3-2013 10:22, ???? ?????????? schreef:
> I don't think it's a good idea to try to fix QStorageInfo.
> The main argument is that QStorageInfo is a monitor+info provider, but 
> monitor should depend on a DBus in Linux; however info provider 
> doesn't require that. Also, monitor requires internal thread on Mac. 
> My point is that in many cases, when you doesn't need monitor itself, 
> it's too heavy to create such a huge object just to receive volume info.
I don't find that a convincing argument. The implementation could be 
such, that the heavy machinery is only instantiated when somebody 
actually connects to the monitoring signals. We have connectNotify and 
disconnectNotify available for that in QObject.

> That's why i separated my solution into 2 different classes; so 
> QtDriveInfo doesn't require external dependencies, like DBus.
I think I would prefer to have the controls and notification signals 
directly on the QDriveInfo class itself. That seems to be more 
consistent with the rest of the Qt API, where I can't think of other 
examples of a separate controller class.

> Next, QStorageInfo notification doesn't work for MingGW and Windows CE.
> Also QStorageInfo doesn't have internal caching.
I am not saying that I think your classes look bad in any way. In fact, 
I think they look pretty neat!
I do have my doubts about the refresh() method. Isn't there any way to 
automatically refresh without getting it too expensive?

Thanks for your efforts so far!

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