Ctrl and Shift selection in QTreeWidget

[npc]

Hi,

I am using QTreeWidget to display the No of items using QTreeWidgetItem like this

QTreeWidgetItem* n;
n = new QTreeWidgetItem ((QTreeWidget*)0, QStringList ( strList ));
n->setFlags ( n->flags() | Qt::ItemIsUserCheckable );
n->setCheckState (0,Qt::Unchecked);

QTreeWidgetItem* n;
n = new QTreeWidgetItem ((QTreeWidget*)0, QStringList ( strList ));
n->setFlags ( n->flags() | Qt::ItemIsUserCheckable );
n->setCheckState (0,Qt::Unchecked);

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I set selectionbehaviour to QAbstractItemView::SelectItems
and selectionmode to QAbstractItemView::ExtendedSelection

Now If I select the items in treewidget using shift+arrow (or) ctrl+mouse pointer and press spacebar, the last item which is selected is checked. but i want to check all the items which are selected. How to achive this ?

I am using Qt 4.2.2/windows

Thanks
*npc*