QFileSystemModel hangs GUI on Windows

m_pqFileSystemModel = new QFileSystemModel;
m_pqFileSystemModel->setRootPath( QDir::rootPath() );
ui->qtvTreeView->setModel( m_pqFileSystemModel );

GUI hangs on creation, and on subsequent expands of folders with large number of files.
Anyone know how to speed things up ( on windows ) ?
The problem is that a lot of work is being done on the GUI thread (don't know if all is just graphics or some work is done as well).

Moving the QFileSystemModel object in a different thread solves the speed problem, but after a while the application crashes under a memory access violation exception.
This problem is old as Qt and no answer is in given to date as to how to circumvent the problem.

Quote:

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Originally Posted by Qt Doc

QFileSystemModel uses a separate thread to populate itself so it will not cause the main thread to hang as the file system is being queried.

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So it must be somthing with you application.

Also try setting the root path after QFileSystemModel::directoryLoaded() is emitted.