Merge pull request #859 from tianzhuqiao/agw_aui_4.0.x

Detach wxControl in AuiToolbar from current sizer before attach to a …
(cherry picked from commit 02041bccb3)

CHANGES.rst

@@ -134,6 +134,8 @@ Changes in this release include the following:
 
 
 
+* Detach wxControl in AuiToolbar from current sizer before attach to a new one.
+  (#843)
 
 4.0.1 "Lemonade"
 ----------------

wx/lib/agw/aui/auibar.py

@@ -3072,6 +3072,9 @@ class AuiToolBar(wx.Control):
                     sizer_item = sizer.Add((item.spacer_pixels, 1))
 
             elif kind == ITEM_CONTROL:
+                if item.window and item.window.GetContainingSizer():
+                    # Make sure that there is only one sizer to this control
+                    item.window.GetContainingSizer().Detach(item.window);
 
                 vert_sizer = wx.BoxSizer(wx.VERTICAL)
                 vert_sizer.AddStretchSpacer(1)