X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/96bfd05319f9e393843e84ca5274d85ff248bad4..7581faf616eef3617152b9ad05b939999f442502:/wxPython/demo/pyTree.py

diff --git a/wxPython/demo/pyTree.py b/wxPython/demo/pyTree.py
index 4af73e3c66..72cb2ff317 100644
--- a/wxPython/demo/pyTree.py
+++ b/wxPython/demo/pyTree.py
@@ -78,11 +78,12 @@ class pyTree(wx.wxTreeCtrl):
         wx.wxTreeCtrl.__init__(self, parent, id)
         self.root = self.AddRoot(str(root), -1, -1, wx.wxTreeItemData(root))
         if dir(root):
-            self.SetItemHasChildren(self.root, wx.TRUE)
+            self.SetItemHasChildren(self.root, wx.True)
         wx.EVT_TREE_ITEM_EXPANDING(self, self.GetId(), self.OnItemExpanding)
         wx.EVT_TREE_ITEM_COLLAPSED(self, self.GetId(), self.OnItemCollapsed)
         wx.EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)
         self.output = None
+        self.Expand(self.root)
 
 
     def SetOutput(self, output):
@@ -111,6 +112,8 @@ class pyTree(wx.wxTreeCtrl):
         will again figure out what the offspring is.
         """
         item = event.GetItem()
+        if self.IsExpanded(item):  # This event can happen twice in the self.Expand call
+            return
         obj = self.GetPyData( item )
         lst = dir(obj)
         for key in lst:
@@ -118,7 +121,7 @@ class pyTree(wx.wxTreeCtrl):
             new_item = self.AppendItem( item, key, -1, -1,
                                         wx.wxTreeItemData(new_obj) )
             if dir(new_obj):
-                self.SetItemHasChildren(new_item, wx.TRUE)
+                self.SetItemHasChildren(new_item, wx.True)
 
     def OnItemCollapsed(self, event):
         """
@@ -186,7 +189,7 @@ if __name__ == '__main__':
         def __init__(self):
             """Make a splitter window; left a tree, right a textctrl. Wow."""
             import __main__
-            wx.wxFrame.__init__(self, wx.NULL, -1, "PyTreeItemData Test",
+            wx.wxFrame.__init__(self, None, -1, "PyTreeItemData Test",
                                 wx.wxDefaultPosition, wx.wxSize(800,500))
             split = wx.wxSplitterWindow(self, -1)
             tree = pyTree(split, -1, __main__)
@@ -202,9 +205,9 @@ if __name__ == '__main__':
         def OnInit(self):
             """OnInit. Boring, boring, boring!"""
             frame = MyFrame()
-            frame.Show(wx.TRUE)
+            frame.Show(wx.True)
             self.SetTopWindow(frame)
-            return wx.TRUE
+            return wx.True
 
     app = MyApp(0)
     app.MainLoop()