1. added wxTreeCtrl::GetLastChild (modified MSW, GTK, generic and docs)

2. added more kbd logic to the generic tree ctrl (Home, End are now
   understood, Left does the same thing as under Windows and not the same
   thing as Up arrow)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1496 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/treectrl.cpp

@@ -457,6 +457,22 @@ wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& WXUNUSED(item),
     return l;
 }
 
+wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const
+{
+    // can this be done more efficiently?
+    long cookie;
+
+    wxTreeItemId childLast,
+    child = GetFirstChild(last, cookie);
+    while ( child.IsOk() )
+    {
+        childLast = child;
+        child = GetNextChild(last, cookie);
+    }
+
+    return childLast;
+}
+
 wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
 {
     return wxTreeItemId((WXHTREEITEM) TreeView_GetNextSibling(wxhWnd, (HTREEITEM) (WXHTREEITEM) item));