Welcome folks today in this blog post we will be multiple splitter frames or windows divider in both vertical and horizontal directions desktop app in python using frame class. All the full source code of the application is given below.

Get Started

In order to get started you need to install the below library using the pip command as shown below

pip install wxpython

After installing this library you need to make an app.py file and copy paste the following code

app.py

import wx

class SplitterExampleFrame(wx.Frame):
    def __init__(self, parent, title):
        wx.Frame.__init__(self, parent, title=title)
        self.MakeMenuBar()
        self.minpane = 0
        self.initpos = 0
        self.sp = wx.SplitterWindow(self)
        self.p1 = wx.Panel(self.sp, style=wx.SUNKEN_BORDER)
        self.p2 = wx.Panel(self.sp, style=wx.SUNKEN_BORDER)
        self.p1.SetBackgroundColour("pink")
        self.p2.SetBackgroundColour("sky blue")
        self.p1.Hide()
        self.p2.Hide()

        self.sp.Initialize(self.p1)
        
        self.Bind(wx.EVT_SPLITTER_SASH_POS_CHANGING,
                  self.OnSashChanging, self.sp)
        self.Bind(wx.EVT_SPLITTER_SASH_POS_CHANGED,
                  self.OnSashChanged, self.sp)


    def MakeMenuBar(self):
        menu = wx.Menu()
        item = menu.Append(-1, "Split horizontally")
        self.Bind(wx.EVT_MENU, self.OnSplitH, item)
        self.Bind(wx.EVT_UPDATE_UI, self.OnCheckCanSplit, item)
        item = menu.Append(-1, "Split vertically")
        self.Bind(wx.EVT_MENU, self.OnSplitV, item)
        self.Bind(wx.EVT_UPDATE_UI, self.OnCheckCanSplit, item)
        item = menu.Append(-1, "Unsplit")
        self.Bind(wx.EVT_MENU, self.OnUnsplit, item)
        self.Bind(wx.EVT_UPDATE_UI, self.OnCheckCanUnsplit, item)

        menu.AppendSeparator()
        item = menu.Append(-1, "Set initial sash position")
        self.Bind(wx.EVT_MENU, self.OnSetPos, item)
        item = menu.Append(-1, "Set minimum pane size")
        self.Bind(wx.EVT_MENU, self.OnSetMin, item)
      
        menu.AppendSeparator()
        item = menu.Append(wx.ID_EXIT, "E&xit")
        self.Bind(wx.EVT_MENU, self.OnExit, item)

        mbar = wx.MenuBar()
        mbar.Append(menu, "Splitter")
        self.SetMenuBar(mbar)

        
    def OnSashChanging(self, evt):
        print("OnSashChanging:", evt.GetSashPosition())
    
    def OnSashChanged(self, evt):
        print("OnSashChanged:", evt.GetSashPosition())
    

    def OnSplitH(self, evt):
        self.sp.SplitHorizontally(self.p1, self.p2, self.initpos)
    
    def OnSplitV(self, evt):
        self.sp.SplitVertically(self.p1, self.p2, self.initpos)

    def OnCheckCanSplit(self, evt):
        evt.Enable(not self.sp.IsSplit())

    def OnCheckCanUnsplit(self, evt):
        evt.Enable(self.sp.IsSplit())

    def OnUnsplit(self, evt):
        self.sp.Unsplit()
    
    def OnSetMin(self, evt):
        minpane = wx.GetNumberFromUser(
            "Enter the minimum pane size",
            "", "Minimum Pane Size", self.minpane,
            0, 1000, self)
        if minpane != -1:
            self.minpane = minpane
            self.sp.SetMinimumPaneSize(self.minpane)

    def OnSetPos(self, evt):
        initpos = wx.GetNumberFromUser(
            "Enter the initial sash position (to be used in the Split call)",
            "", "Initial Sash Position", self.initpos,
            -1000, 1000, self)
        if initpos != -1:
            self.initpos = initpos
    

    def OnExit(self, evt):
        self.Close()


app = wx.PySimpleApp(redirect=True)
frm = SplitterExampleFrame(None, "Splitter Example")
frm.SetSize((600,500))
frm.Show()
app.SetTopWindow(frm)
app.MainLoop()

If you execute the above python script by typing the below command

python app.py