added wxTreeCtrl::GetFocusedItem() (closes #10859)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61134 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/treectrl.h

@@ -210,6 +210,10 @@ public:
         //     control with a lot of items (~ O(number of items)).
     virtual size_t GetSelections(wxArrayTreeItemIds& selections) const = 0;
 
+        // get the last item to be clicked when the control has wxTR_MULTIPLE
+        // equivalent to GetSelection() if not wxTR_MULTIPLE
+    virtual wxTreeItemId GetFocusedItem() const = 0;
+
         // get the parent of this item (may return NULL if root)
     virtual wxTreeItemId GetItemParent(const wxTreeItemId& item) const = 0;