Question

I’m a newbie in wxpython and have been trying to put some widgets within books(treebook, notebook, choicebook) I have often ended up with some widgets placed inside containers not responding to events. I’m not sure what I’m doing wrong. Below is one of my code

import wx

class ChoicePanelTwo(wx.Panel):
    def __init__(self, parent, seed):
        wx.Panel.__init__(self, parent=parent, id=wx.ID_ANY)
        self.SetBackgroundColour('blue')
        sizer = wx.BoxSizer(wx.HORIZONTAL)
        self.List = wx.ListCtrl(self, -1, style=wx.LC_REPORT)
        for i in range(seed):
            self.List.InsertStringItem(i, str(i))
        sizer.Add(self.List, 1, wx.ALL|wx.EXPAND, 5)
        self.SetSizer(sizer)

class ChoicePanelOne(wx.Panel):
    def __init__(self, parent, seed):
        wx.Panel.__init__(self, parent=parent, id=wx.ID_ANY)
        self.SetBackgroundColour('green')
        sizer = wx.BoxSizer(wx.HORIZONTAL)
        self.RegisterList = wx.Choicebook(self, wx.ID_ANY)
        sizer.Add(self.RegisterList, 1, wx.ALL|wx.EXPAND, 5)
        for i in range(seed):
            self.RegisterList.AddPage(ChoicePanelTwo(self, seed*50),  str(i))
        self.SetSizer(sizer)

class TreePanel(wx.Panel):
    def __init__(self, parent, seed):
        wx.Panel.__init__(self, parent, id=wx.ID_ANY)
        self.SetBackgroundColour('cyan')
        self.Choicbook = wx.Choicebook(self, wx.ID_ANY)
        for i in range(seed):
            self.Choicbook.AddPage(ChoicePanelOne(self, seed*2), str(i))
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.Choicbook, 1, wx.ALL|wx.EXPAND, 5)
        self.SetSizer(sizer)

class AppFrame(wx.Frame):
    """ The main frame of the application
    """
    title = 'Application'
    WindowSize = (1024, 768)
    seed = 2

    def __init__(self):
        wx.Frame.__init__(self, None, -1, self.title, size=self.WindowSize, style=wx.MINIMIZE_BOX|wx.SYSTEM_MENU|wx.CAPTION|wx.CLOSE_BOX|wx.CLIP_CHILDREN)
        self.create_main_panel()

    def create_main_panel(self):
        self.panel = TreePanel(self, self.seed)        

if __name__ == '__main__':
    app = wx.PySimpleApp()
    app.frame = AppFrame()
    app.frame.Show()
    app.MainLoop()

In this example. The choice book and list does seem to be working. What is that I’m doing wrong ?

Answer 1

It’s a parenting issue. You are setting all the ChoicePanelOne instance’s parents as the TreePanel when it should be the ChoicBook. And you’re doing the same thing in ChoicePanelOne where you create a whole bunch of ChoicePanelTwo’s whose parents are ChoicePanelOne when they should be RegisterList. Check out the slightly changed code below:

import wx

class ChoicePanelTwo(wx.Panel):
    def __init__(self, parent, seed):
        wx.Panel.__init__(self, parent=parent, id=wx.ID_ANY)
        self.SetBackgroundColour('blue')
        sizer = wx.BoxSizer(wx.HORIZONTAL)
        self.List = wx.ListCtrl(self, -1, style=wx.LC_REPORT)
        for i in range(seed):
            self.List.InsertStringItem(i, str(i))
        sizer.Add(self.List, 1, wx.ALL|wx.EXPAND, 5)
        self.SetSizer(sizer)

class ChoicePanelOne(wx.Panel):
    def __init__(self, parent, seed):
        wx.Panel.__init__(self, parent=parent, id=wx.ID_ANY)
        self.SetBackgroundColour('green')
        sizer = wx.BoxSizer(wx.HORIZONTAL)
        self.RegisterList = wx.Choicebook(self, wx.ID_ANY)
        sizer.Add(self.RegisterList, 1, wx.ALL|wx.EXPAND, 5)
        for i in range(seed):
            self.RegisterList.AddPage(ChoicePanelTwo(self.RegisterList, seed*50),  str(i))
        self.SetSizer(sizer)

class TreePanel(wx.Panel):
    def __init__(self, parent, seed):
        wx.Panel.__init__(self, parent, id=wx.ID_ANY)
        self.SetBackgroundColour('cyan')
        self.Choicbook = wx.Choicebook(self, wx.ID_ANY)
        for i in range(seed):
            self.Choicbook.AddPage(ChoicePanelOne(self.Choicbook, seed*2), str(i))
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.Choicbook, 1, wx.ALL|wx.EXPAND, 5)
        self.SetSizer(sizer)

class AppFrame(wx.Frame):
    """ The main frame of the application
    """
    title = 'Application'
    WindowSize = (1024, 768)
    seed = 2

    def __init__(self):
        wx.Frame.__init__(self, None, -1, self.title, size=self.WindowSize, 
                          style=wx.MINIMIZE_BOX|wx.SYSTEM_MENU|wx.CAPTION|wx.CLOSE_BOX|wx.CLIP_CHILDREN)
        self.create_main_panel()

    def create_main_panel(self):
        self.panel = TreePanel(self, self.seed)        

if __name__ == '__main__':
    app = wx.PySimpleApp()
    app.frame = AppFrame()
    app.frame.Show()
    app.MainLoop()

You should download the wxPython demo as it has lots of good examples in it. Also see the wiki or my blog article.

You could use the Widget Inspection Tool to help you diagnose the problem as well as it will show you what parent is where and how your sizers are laid out, among other things.