implement wxTreeCtrl::ItemHasChildren() properly for virtual root item; added unit test for it

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58177 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2009-01-17 13:16:25 +00:00
parent 9ebfc96354
commit fa97ee2490
12 changed files with 138 additions and 0 deletions
--- a/src/msw/treectrl.cpp
+++ b/src/msw/treectrl.cpp
@@ -1213,6 +1213,12 @@ bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 {
    wxCHECK_MSG( item.IsOk(), false, wxT("invalid tree item") );

+    if ( IS_VIRTUAL_ROOT(item) )
+    {
+        wxTreeItemIdValue cookie;
+        return GetFirstChild(item, cookie).IsOk();
+    }
+
    wxTreeViewItem tvItem(item, TVIF_CHILDREN);
    DoGetItem(&tvItem);