Hi,

When I create a QTreeView with QStandardItemModel, I could see the QStandardItems in the tree view.
I try to expand some of them by expand() or setExpanded(), but it doesn't work.
Then I try to expand all by expandAll(), it doesn't work also.
I can see isExpanded() return TRUE after the calling above.
It should be something wrong with my QTreeView. Any idea? Thanks.