file and diretory view

[hbill]

If i use for exampl a mouse event, how can i identify which item on the treeview is clicked ?
for exampl on QTreeWidget i can use my class

class myTreeWidget:public QTreeWidget

class myTreeWidget:public QTreeWidget

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void mousePressEvent (QMouseEvent *event)
signals:
   void itemClicked (QTreeWidgetItem *);
//......
void myTreeWidget::itemClicked(QMouseEvent * e)
{
   QTreeWidgetItem *selectedItem = itemAt(e->pos());
   emit itemClicked(selectedItem);
}

void mousePressEvent (QMouseEvent *event)
signals:
   void itemClicked (QTreeWidgetItem *);
//......
void myTreeWidget::itemClicked(QMouseEvent * e)
{
   QTreeWidgetItem *selectedItem = itemAt(e->pos());
   emit itemClicked(selectedItem);
}

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how can i use like this on QTreeView
thank you