QListView/QFileSystemModel:Change directory.

[fatseed]

Hi, All,
I am coding for a simple project similar with files manager. I use a QListView to show and manipulate the folders and files. The model of the QListView is QFileSystemModel. The following codes are used to change the directory.
@

if (m_pFileSystemModel->isDir(Index))
{
setRootIndex(Index);
}

@

These codes are put in a slot connected with the double click signal. I can change the normal directory with these codes. But, when I double click the folders "." and "..", all the folders are disappeared.
The filter for the QFileSystem is

@
m_pFileSystemModel->setFilter( QDir::AllDirs|QDir::AllEntries);
m_pFileSystemModel->setNameFilters(strsFilter);
m_pFileSystemModel->setNameFilterDisables(false);
@

Could anyone help me in this case.

Thank you.