-        self.tree = gizmos.TreeListCtrl(self, -1, style = wx.TR_DEFAULT_STYLE
-                                   #| wx.TR_ROW_LINES
-                                   #| wx.TR_NO_LINES 
-                                   #| wx.TR_TWIST_BUTTONS
-                                   #| wx.TR_FULL_ROW_HIGHLIGHT     
+        self.tree = gizmos.TreeListCtrl(self, -1, style =
+                                        wx.TR_DEFAULT_STYLE
+                                        #wx.TR_TWIST_BUTTONS
+                                        #| wx.TR_ROW_LINES
+                                        #| wx.TR_NO_LINES 
+                                        | wx.TR_FULL_ROW_HIGHLIGHT
+
+                                        # By default the style will be adjusted on
+                                        # Mac to use twisty buttons and no lines.  If
+                                        # you would rather control this yourself then
+                                        # add this style.
+                                        #| wx.TR_DONT_ADJUST_MAC