如题，在QT中有没有treeView的item失去焦点和获取焦点的函数呢
QT TreeView
------解决方案--------------------
virtual void selectionChanged ( const QItemSelection & selected, const QItemSelection & deselected )重载这个
------解决方案--------------------
或者这个virtual void currentChanged ( const QModelIndex & current, const QModelIndex & previous )