[WxPython] Why is choicebox not displayed?

[merlem]

The code:

import wx

showliste = ["item1", "item2", "item3"]

class Mainframe(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title)
        
        self.shopanel = Shopanel(self, id)
        
        vbox = wx.BoxSizer(wx.VERTICAL) 
        vbox.Add(self.shopanel, 0, wx.EXPAND)
        
        self.SetSizer(vbox)

        self.Show()


class Shopanel(wx.Panel):
    def __init__(self, parent, id):
        wx.Panel.__init__(self, parent, id)
        
        self.SetMinSize((100, 100))
        self.SetMaxSize((150, 150))
        
        chos = wx.MultiChoiceDialog(self, "show:", "",
                                     showliste)
        chos.SetSelections(range(len(showliste[:-1])))
        
        hbox = wx.BoxSizer(wx.HORIZONTAL)
        hbox.Add(chos)
        self.SetSizerAndFit(hbox)
        


if __name__ == "__main__": 

    app = wx.App(0)
    Mainframe(None, -1, "Mainframe")  

    app.MainLoop() 

And two questions:
First and more important, why is the choicebox not shown? I simply get an empty window.
Second, how to make SetMinSize and SetMaxSize doing something, in the best case even influencing the panelsize? Actually, they just seem to do... nothing.

[Yoriz]

A wx.MultiChoiceDialog is a type of ready built frame with widgets already contained, it is not supposed to be used as a child widget of another frame, it is shown using ShowModal, maybe a a wx.ListCtrl with a checklist mixin is the control you are after.

SetMinSize & SetMaxSize is probably better setting for the parent frame.

import wx
from wx.lib.mixins.listctrl import CheckListCtrlMixin, ListCtrlAutoWidthMixin

showliste = ["item1", "item2", "item3"]

class Mainframe(wx.Frame):
   def __init__(self, parent, id_, title):
       wx.Frame.__init__(self, parent, id_, title)
       self.SetMinSize((100, 100))
       self.SetMaxSize((150, 150))
       self.shopanel = Shopanel(self, id_)
        
       vbox = wx.BoxSizer(wx.VERTICAL) 
       vbox.Add(self.shopanel, 1, wx.EXPAND)
       
       self.SetSizer(vbox)
       self.Fit()

       self.Show()


class TestListCtrl(wx.ListCtrl, CheckListCtrlMixin, ListCtrlAutoWidthMixin):
   def __init__(self, *args, **kwargs):
       wx.ListCtrl.__init__(self, *args, **kwargs)
       CheckListCtrlMixin.__init__(self)
       ListCtrlAutoWidthMixin.__init__(self)


class Shopanel(wx.Panel):
   def __init__(self, parent, id_):
       wx.Panel.__init__(self, parent, id_)
        
       chos = TestListCtrl(self, style=wx.LC_REPORT)
       chos.InsertColumn(0, '')
       chos.InsertColumn(1, 'Item')
       chos.SetColumnWidth(0, 30)
       for item in showliste:
           chos.Append(('', item))
           
       chos.CheckItem(0)
       chos.CheckItem(1)
       chos.Select(0)

       hbox = wx.BoxSizer(wx.HORIZONTAL)
       hbox.Add(chos, 1, wx.EXPAND| wx.ALL, 5)
       self.SetSizer(hbox)
        


if __name__ == "__main__": 

   app = wx.App(0)
   Mainframe(None, -1, "Mainframe")
   
   chos = wx.MultiChoiceDialog(None, "show:", "", showliste)
   chos.SetSelections(range(len(showliste[:-1])))
   chos.ShowModal()

   app.MainLoop() 

[merlem]

Thank you very much for your help!
It's even less complicated, I was looking for wx.ListCtrl and just didn't find the right thing. And same is true for the size... I wish to define the size for the single panel, but I probably should try to set it in the superordinate vbox.

The wx.lib.mixins.listctrl looks also very interesting, but there is probably no detailed documentation or explanation somewhere in the web? I found some words about it in the API docs, but it's confusing for someone who still needs an explication, not only a list of possibilities.