Why am I seeing glitches when using wx.SplitterWindow?

Question

I'm currently using wx.SpliterWindow in my wxpython application. When I run the application, the GUI appears fine. However, when I attempt to move the divider between the parts of the splitter window, multiple weird horizontal multicolored glitches appear. They continue to appear wherever I move the divider. Once I release the divider, the glitches disappear. (I attempted to upload a picture or GIF of this behavior, but the glitches disappear too quickly to be captured. If I'm able to make a picture or GIF , I'll post it.)

Here is the code I'm running:

import wx


class Panel1(wx.Panel):
    def __init__(self, parent, *args, **kwargs):
        super().__init__(parent=parent, *args, **kwargs)
        self.SetBackgroundColour((0, 0, 255))


class Panel2(wx.Panel):
    def __init__(self, parent, *args, **kwargs):
        super().__init__(parent=parent, *args, **kwargs)
        self.SetBackgroundColour((0, 255, 0))


class Frame(wx.Frame):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        splitter = wx.SplitterWindow(self)
        panel1 = Panel1(splitter)
        panel2 = Panel2(splitter)

        splitter.SplitHorizontally(panel1, panel2)
        splitter.SetMinimumPaneSize(20)

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(splitter, 1, wx.EXPAND)
        self.SetSizer(sizer)


class App(wx.App):
    def OnInit(self):
        editor = Frame(None, title='wxPython')
        editor.Show()
        return True


if __name__ == '__main__':
    app = App(False)
    app.MainLoop()

Is this behavior a know bug when using wx.SplitterWindow on certian platforms? I couldn't find anything on wxPython's issues page.

Here are my specifications

• Windows 10.0
• Python 3.6.1
• wxPython 4.0.0b2

Answer 1

It's not a bug,just set flag wxSP_LIVE_UPDATE. In DOC,this flag will

Don't draw XOR line but resize the child windows immediately.

In python, just write this splitter = wx.SplitterWindow(self, style = wx.SP_LIVE_UPDATE),then it will perform normal.