Hi,
OS: Linux Chris-X451MA 4.4.0-97-generic #120-Ubuntu SMP Tue Sep 19
17:28:18 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Python 3.5.2 (default, Sep 14 2017, 22:51:06)
I am trying to learn how to use a tkinter listbox. When I execute my
experimental code, an odd index is printed immediately (output below
code), index looks wrong (shouldn’t it be an integer). Also it doesn't
print new values when I select an entry.
---------------------------------------------------
#!/usr/bin/python3
#test listbox
from tkinter import *
class Dialog(Frame):
def __init__(self, master):
Frame.__init__(self, master)
self.list = Listbox(self, selectmode=EXTENDED)
self.list.pack(fill=BOTH, expand=1)
self.current = None
self.poll() # start polling the list
def poll(self):
now = self.list.curselection()
if now != self.current:
self.list_has_changed(now)
self.current = now
self.after(250, self.poll)
def list_has_changed(self, selection):
print ("selection is", selection)
snames=('fred', 'george', 'manuel', 'john', 'eric', 'terry')
master = Tk()
listbox = Listbox(master)
listbox.grid(row=0)
for item in snames:
listbox.insert(END, item)
myindicator=Dialog.list_has_changed(master, listbox)
mainloop()
-----------------------------------------
output:
---------------------------------------
./listbox.py
selection is .140537834621024
Thank you for any help
Regards, Chris Roy-Smith
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