Problems with wx.TreeCtrl

[MrQ]

I have a problem with tree control and i don't know how to solve it, maybe someone can help me. What i'm trying to do is display widgets in a staticbox plus a help text when i select different items in a tree.
For example when i select item1 in a a tree control i want to display two checkboxes in Demo staticbox control. When i select item2 display only two radio buttons in the same control and so on. Plus for every item selected in the tree control display some help text in text control. If someone can help with that or give me an idea to start i will be very grateful.
Here is the demo code (it's not very organized but it's only for testing):
(I don't know what's the problem but when i use tags code is messed up so i have to manually enter tags)

import wx
 
 
class DemoFrame(wx.Frame):
 
    def __init__(self, parent, id):
 
        wx.Frame.__init__(self, parent, id, 'Demo', size=(600, 400), pos=(300,300))
 
        self.panel1=wx.Panel (self, -1)
        self.panel1.SetBackgroundColour ("white")
        self.DoLayout ()
 
 
 
    def DoLayout (self):
 
        #sizers
        mainsizer = wx.BoxSizer(wx.VERTICAL)
        panelsizer = wx.BoxSizer(wx.VERTICAL)
        sizer1 = wx.BoxSizer(wx.VERTICAL)
        sizer2 = wx.BoxSizer(wx.VERTICAL)
 
####################################################################        
        #create splitter windows
        self.splitter = wx.SplitterWindow(self, style=wx.CLIP_CHILDREN | wx.SP_LIVE_UPDATE | wx.SP_3D)
        self.splitter2 = wx.SplitterWindow(self.splitter, -1, style=wx.CLIP_CHILDREN | wx.SP_LIVE_UPDATE | wx.SP_3D)
 
        self.mainpanel = wx.Panel(self.splitter, -1)
        self.leftpanel2 = wx.Panel(self.splitter2, -1, style=wx.WANTS_CHARS)
        self.mainpanel.SetBackgroundColour ("white")
 
####################################################################
 
        #create tree control
        self.tree = wx.TreeCtrl(self.mainpanel, -1, wx.Point(0, 0), wx.Size(160, 250),
                            wx.TR_DEFAULT_STYLE | wx.NO_BORDER)
        self.root = self.tree.AddRoot("Root Demo Item")
        item1 = self.tree.AppendItem (self.root, "Item1",0)
        item2 = self.tree.AppendItem (self.root, "Item2",0)
        self.tree.Expand(self.root)
 
###################################################################################
        #add other widgets
        self.help = wx.TextCtrl(self.splitter2, -1,
                               style = wx.TE_MULTILINE|wx.TE_READONLY | wx.HSCROLL)
        staticboxstyles = wx.StaticBox(self.leftpanel2, -1, "Demo", size=(485, 240))
        self.splitter2.SetBackgroundColour (wx.SystemSettings_GetColour(wx.SYS_COLOUR_3DFACE))
#################################################################################        
        #add widgets to sizers
        panelsizer.Add(self.splitter, 1, wx.EXPAND, 0)
        sizer1.Add(self.tree, 1, wx.EXPAND)
        sizer2.Add(staticboxstyles, 1, wx.BOTTOM|wx.EXPAND|wx.ALIGN_BOTTOM, 60 )
 
 
########################################################################################        
        #set sizers
        self.mainpanel.SetSizer(sizer1)
        self.leftpanel2.SetSizer(sizer2)
        self.SetSizer(panelsizer)
        mainsizer.Layout()
        self.Layout()
 
#######################################################################
 
        #set splitters
        self.splitter.SplitVertically(self.mainpanel, self.splitter2, 300)
        self.splitter2.SplitHorizontally(self.leftpanel2, self.help, -160)
        self.splitter.SetSashPosition (200)
 
 
if __name__ == '__main__':
    app = wx.PySimpleApp()
    frame = DemoFrame(parent=None, id=-1)
    frame.Show()
    app.MainLoop()

[MrQ]

Nobody ? Not even a hint, idea or something ?