[Tutor] update a ws.ListBox

John Gerdeman johnpatrick at gerdeman.de
Wed Nov 28 19:24:02 CET 2007


I'm trying to create a gui using wxpython on ubuntu 6.10 (read, that
some functions of wx differ on different OS). 

I have two Listbox items, Listbox1 and Listbox2. I want to update
Listbox2 according to the choice made in Listbox1.
I already looked at the wx API doc, but only found methods to insert
items or (de)select.

I know I can update a textctrl, but I need a way to make a choice based
on the first.

Here a Minimal example:


import wx

class MyFrame(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title, wx.DefaultPosition,
(550, 350))

        self.listbox1_items = [ 'item1', 'item2']
        self.listbox2_items = ['select a item from the right']

        hbox1 = wx.BoxSizer(wx.HORIZONTAL)
        vbox = wx.BoxSizer(wx.VERTICAL)

        panel = wx.Panel(self, -1)

        self.listbox1 = wx.ListBox(panel, 1, wx.DefaultPosition, (170,
130), self.listbox1_items, wx.LB_SINGLE)
        self.listbox2 = wx.ListBox(panel, 2, wx.DefaultPosition, (170,
130), self.listbox2_items, wx.LB_SINGLE)
        hbox1.Add(self.listbox1, 0, wx.TOP, 40)
        hbox1.Add(self.listbox2, 0, wx.TOP, 40)
        vbox.Add(hbox1, 0, wx.ALIGN_CENTRE)

        self.Bind(wx.EVT_LISTBOX, self.OnListBox1, id=1)
        self.Bind(wx.EVT_LISTBOX, self.OnListBox2, id=2)

    def OnListBox1(self, event):
		index = event.GetSelection()
		choice = self.listbox1_items[index]
		print "You chose " + str(choice)
		if choice == 'item1':
			ret = ['choice1', 'choice2']
		elif choice == 'item2':
			ret = ['choice3', 'choice4']
			ret = ['Ooops']
		print "Now I somehow need a way to pass to self.listbox2 I can set
self.listbox2_items to ret, but self.listbox2 doesn't get updated"
		print ret
    def OnListBox2(self, event):
	    return True

class MyApp(wx.App):
    def OnInit(self):
        frame = MyFrame(None, -1, 'minexample.py')
        return True

app = MyApp(0)

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