git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33826 
c3d73ce0-8a6f-49c7-b76d-
6d57e0e08775
 
         valueWindow = TestValueWindow(splitter, style=wx.NO_BORDER)
 
 
         valueWindow = TestValueWindow(splitter, style=wx.NO_BORDER)
 
-        splitter.SplitVertically(tree, valueWindow, 150)
+        wx.CallAfter(splitter.SplitVertically, tree, valueWindow, 150)
         scroller.SetTargetWindow(tree)
         scroller.EnableScrolling(False, False)
 
         scroller.SetTargetWindow(tree)
         scroller.EnableScrolling(False, False)
 
 
         if item:
             self.log.WriteText("OnLeftDClick: %s\n" % self.tree.GetItemText(item))
             parent = self.tree.GetItemParent(item)
         if item:
             self.log.WriteText("OnLeftDClick: %s\n" % self.tree.GetItemText(item))
             parent = self.tree.GetItemParent(item)
-            self.tree.SortChildren(parent)
+            if parent.IsOk():
+                self.tree.SortChildren(parent)