Home/ Questions/Q 94433
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-10T23:30:03+00:00

I’ve been working with python for a while now and am just starting to

  • 0

I’ve been working with python for a while now and am just starting to learn wxPython. After creating a few little programs, I’m having difficulty understanding how to create objects that can be shared between dialogs.

Here’s some code as an example (apologies for the length – I’ve tried to trim):

import wx  class ExampleFrame(wx.Frame):     '''The main GUI'''     def __init__(self, parent, id, title):         wx.Frame.__init__(self, parent, id, title, size=(200,75))         mainSizer = wx.BoxSizer(wx.VERTICAL)          # Setup buttons         buttonSizer = wx.BoxSizer(wx.HORIZONTAL)         playerButton = wx.Button(self, wx.ID_ANY, 'Player number', wx.DefaultPosition, wx.DefaultSize, 0)         buttonSizer.Add(playerButton, 1, wx.ALL | wx.EXPAND, 0)         nameButton = wx.Button(self, wx.ID_ANY, 'Player name', wx.DefaultPosition, wx.DefaultSize, 0)         buttonSizer.Add(nameButton, 1, wx.ALL | wx.EXPAND, 0)          # Complete layout and add statusbar         mainSizer.Add(buttonSizer, 1, wx.EXPAND, 5)         self.SetSizer(mainSizer)         self.Layout()          # Deal with the events         playerButton.Bind(wx.EVT_BUTTON, self.playerButtonEvent)         nameButton.Bind(wx.EVT_BUTTON, self.nameButtonEvent)         self.Show(True)         return      def playerButtonEvent(self, event):         '''Displays the number of game players'''         playerDialog = PlayerDialogWindow(None, -1, 'Player')         playerDialogResult = playerDialog.ShowModal()          playerDialog.Destroy()         return      def nameButtonEvent(self, event):         '''Displays the names of game players'''         nameDialog = NameDialogWindow(None, -1, 'Name')         nameDialogResult = nameDialog.ShowModal()          nameDialog.Destroy()         return  class PlayerDialogWindow(wx.Dialog):     '''Displays the player number'''     def __init__(self, parent, id, title):         wx.Dialog.__init__(self, parent, id, title, size=(200,120))          # Setup layout items         self.SetAutoLayout(True)         mainSizer = wx.BoxSizer(wx.VERTICAL)         dialogPanel = wx.Panel(self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, wx.TAB_TRAVERSAL)         dialogSizer = wx.BoxSizer(wx.VERTICAL)          # Display player number         playerNumber = 'Player number is %i' % gamePlayer.number         newLabel = wx.StaticText(dialogPanel, wx.ID_ANY, playerNumber, wx.DefaultPosition, wx.DefaultSize, 0)         dialogSizer.Add(newLabel, 0, wx.ALL | wx.EXPAND, 5)          # Setup buttons         buttonSizer = wx.StdDialogButtonSizer()         okButton = wx.Button(dialogPanel, wx.ID_OK)         buttonSizer.AddButton(okButton)         buttonSizer.Realize()         dialogSizer.Add(buttonSizer, 1, wx.EXPAND, 5)          # Complete layout         dialogPanel.SetSizer(dialogSizer)         dialogPanel.Layout()         dialogSizer.Fit(dialogPanel)         mainSizer.Add(dialogPanel, 1, wx.ALL | wx.EXPAND, 5)         self.SetSizer(mainSizer)         self.Layout()          # Deal with the button events         okButton.Bind(wx.EVT_BUTTON, self.okClick)         return      def okClick(self, event):         '''Deals with the user clicking the ok button'''         self.EndModal(wx.ID_OK)         return   class NameDialogWindow(wx.Dialog):     '''Displays the player name'''     def __init__(self, parent, id, title):         wx.Dialog.__init__(self, parent, id, title, size=(200,120))          # Setup layout items         self.SetAutoLayout(True)         mainSizer = wx.BoxSizer(wx.VERTICAL)         dialogPanel = wx.Panel(self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, wx.TAB_TRAVERSAL)         dialogSizer = wx.BoxSizer(wx.VERTICAL)          # Display player number         playerNumber = 'Player name is %s' % gamePlayer.name         newLabel = wx.StaticText(dialogPanel, wx.ID_ANY, playerNumber, wx.DefaultPosition, wx.DefaultSize, 0)         dialogSizer.Add(newLabel, 0, wx.ALL | wx.EXPAND, 5)          # Setup buttons         buttonSizer = wx.StdDialogButtonSizer()         okButton = wx.Button(dialogPanel, wx.ID_OK)         buttonSizer.AddButton(okButton)         buttonSizer.Realize()         dialogSizer.Add(buttonSizer, 1, wx.EXPAND, 5)          # Complete layout         dialogPanel.SetSizer(dialogSizer)         dialogPanel.Layout()         dialogSizer.Fit(dialogPanel)         mainSizer.Add(dialogPanel, 1, wx.ALL | wx.EXPAND, 5)         self.SetSizer(mainSizer)         self.Layout()          # Deal with the button events         okButton.Bind(wx.EVT_BUTTON, self.okClick)         return      def okClick(self, event):         '''Deals with the user clicking the ok button'''         self.EndModal(wx.ID_OK)         return   class Player(object):     '''A game player'''     def __init__(self, number, name):         self.number = number         self.name = name         return  def main():     # Start GUI     global gamePlayer     gamePlayer = Player(1, 'John Smith')     app = wx.App(redirect=False)     frame = ExampleFrame(None, -1, 'Example frame')     frame.Show(True)     app.MainLoop()     return 0  if __name__ == '__main__':     main()

So, I want both of the dialogs to access the gamePlayer object. At the moment, the only way I can think of doing it is to create the gamePlayer object as a global object, but these are normally frowned upon – is there a better way to do this?

There is a method of passing objects in event bindings in this question, but it doesn’t feel quite right.

Is learning to implement the MVC pattern the way forward here?

Thanks.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. You can pass a gamePlayer object to __init__ as another argument.

    def __init__(self, parent, id, title, gamePlayer ):     ...etc...

    In the long run, this isn’t ideal.

    You should separate building an empty panel from loading that panel with data. The empty panel is one thing, populating it with data from the model is unrelated.

    Populating a frame with data is where you must be given the gamePlayer object which will be used to update the various display widgets.

    I’d suggest you look at the Document-View framework for guidance on this. http://docs.wxwidgets.org/stable/wx_docviewoverview.html#docviewoverview. Unfortunately, there aren’t any good Python examples of this, so it can be confusing to convert from the C++ code to Python.

    Ultimately, you have a ‘document’ which is the main object (‘gamePlayer’) that is being displayed. Each Frame is a view of that document.

    • 0