Sizers for wx.SplitterWindow not working wxPython

So I have three splitter windows that I am trying to use sizers for so that they act normal when getting resized and such. Here's the code I have right now. It is not working.

class SplitterFrame (wx.Frame):

def __init__(self):
 #Create a master window
    self.mainframe = wx.Frame.__init__(self,None,title = 'some frame')
    self.splitter = wx.SplitterWindow(self,-1, style = wx.SP_LIVE_UPDATE)
    self.splitter2 = wx.SplitterWindow(self.splitter,-1, style = wx.SP_LIVE_UPDATE)
    self.splitter.SetMinimumPaneSize(330)
    self.splitter2.SetMinimumPaneSize(160)


    self.panel1 = wx.Panel(self.splitter,-1)
    self.panel1.SetBackgroundColour(wx.WHITE)

    self.panel2 = wx.Panel(self.splitter2,-1)
    self.panel2.SetBackgroundColour(wx.WHITE)

    self.panel3 = wx.Panel(self.splitter2, -1)
    self.panel3.SetBackgroundColour(wx.WHITE)

    #Splitter window attributes
    self.splitter2.SplitVertically(self.panel2,self.panel3, 100)
    self.splitter.SplitVertically(self.panel1,self.splitter2, 200)
    self.splitter.SetSashGravity(0)
    self.splitter2.SetSashGravity(1)
    self.splitter.SetSashPosition(1,redraw = True)
    self.splitter2.SetSashPosition(10000,redraw = True)
    self.Centre()
    self.Layout()
    self.Maximize(True)
    self.Bind(wx.EVT_CLOSE,self.OnClose)

                                   #Set Sizers
    sizer = wx.BoxSizer(wx.VERTICAL)
    sizer.Add(self.splitter,1,wx.ALL|wx.EXPAND)
    sizer.Add(self.splitter2,1,wx.ALL|wx.EXPAND)
    self.SetSizer(sizer)

Can someone show me how to apply the right sizers to this? I'm not good at all with sizers so I just used the ones above as I found them here [wxPython Splitter windows and Panels .

Solution

You cannot add both splitters into the sizer, because they are not siblings in the hierarchy of the windows. So you have the splitter, then another splitter in one of the panels. Sizers won't help you, because sizers directly with the windows inside the sizer, but you have only one window in the sizer (self.splitter), another one (self.splitter2) is inside the self.splitter. So the sizing must happen within the splitters themselves. You will have to handle the Frame's OnSize event, and resize the inner splitters there.

Edit: Added the code.

class SplitterFrame (wx.Frame):
    def __init__(self):
        #Create a master window
        wx.Frame.__init__(self,None,title = 'some frame')
        self.splitter = wx.SplitterWindow(self,-1, style = wx.SP_LIVE_UPDATE)
        self.splitter2 = wx.SplitterWindow(self.splitter,-1, style = wx.SP_LIVE_UPDATE)
        self.splitter.SetMinimumPaneSize(20)
        self.splitter2.SetMinimumPaneSize(20)

        self.panel1 = wx.Panel(self.splitter,-1)
        self.panel1.SetBackgroundColour(wx.WHITE)

        self.panel2 = wx.Panel(self.splitter2,-1)
        self.panel2.SetBackgroundColour(wx.WHITE)

        self.panel3 = wx.Panel(self.splitter2, -1)
        self.panel3.SetBackgroundColour(wx.WHITE)

        #Splitter window attributes
        self.splitter2.SplitVertically(self.panel2,self.panel3, 100)
        self.splitter.SplitVertically(self.panel1,self.splitter2, 100)
        self.splitter.SetSashGravity(0)
        self.splitter2.SetSashGravity(1)
        self.Centre()
        self.Layout()
        self.Maximize(True)
        self.Bind(wx.EVT_SIZE, self.OnSize)

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.splitter,2,wx.ALL|wx.EXPAND)
        self.SetSizer(sizer)

    def OnSize(self, evt):
        evt.Skip()
        # here you will change the sash positions to your liking
        self.splitter.SetSashPosition(100,redraw = True)
        self.splitter2.SetSashPosition(200,redraw = True)