# Tk_listboxfullscroll.py

# Tk_listboxfullscroll.py

from Tkinter import *

def yview(*args):
    """ scroll both listboxes together """
    if len(args) is 1: args = "scroll", args, "units"
    select1.yview(*args)
    select2.yview(*args)

root = Tk()

keyU=38
keyD=40
keyL=37
keyR=39

root.hasFocus = None

frame = Frame(root)
frame.pack()
scroll = Scrollbar(frame, orient=VERTICAL, command=yview)
select1 = Listbox(frame, height=30, width=40,  selectmode=SINGLE, selectbackground='purple')
    # + exportselection=False
select1.config(yscrollcommand=scroll.set)
select1.pack(side=LEFT)
select2 = Listbox(frame, height=30, width=160, selectmode=SINGLE, selectbackground='purple') # selectmode=MULTIPLE
select2.config(yscrollcommand=scroll.set)
scroll.pack(side=RIGHT, fill=Y)
select2.pack(side=RIGHT)

def OnFocus1(e):
    root.hasFocus = 'Column A'
    OnSelect(e)

def OnFocus2(e):
    root.hasFocus = 'Column B'
    OnSelect(e)

def OnSelect(e):
    w = e.widget
    cbgSelect()
    print root.hasFocus
    for i in w.curselection():
        print 'You selected: %s' % (w.get(i)) ### ZZZ generic for multi-select option
        select1.itemconfigure(i, fg='white', bg='purple')
        select2.itemconfigure(i, fg='white', bg='purple')
    print
    frame.focus_set()

def OnMouseWheel(event):
    e = -25
    if event.delta < 1: e = 25
    yview(e)
    return 'break'

def OnKeyPressed(event):
    e=0
    if   event.keycode is keyU: e = -1
    elif event.keycode is keyD: e = 1
    yview(e)
    return 'break'

select1.bind('<FocusIn>', OnFocus1)
select2.bind('<FocusIn>', OnFocus2)
frame.bind_all('<MouseWheel>',  OnMouseWheel)
#   frame.bind_all("<Button-1>", OnMouseL) ### replaced with OnFocus
frame.bind_all('<KeyPress>',    OnKeyPressed)
#   frame.bind_all('<<ListboxSelect>>', OnSelect)

def setSelect() :
    select1.delete(0,END)
    select2.delete(0,END)
    for i in range(100):
        select1.insert('end','%s' % i)
        select2.insert('end','%s' % i)
    cbgSelect()

def cbgSelect() :
    for i in range(0, 100):
        cbg = '#FFFFFF'
        if i % 2: cbg = '#CCCCFF'
        select1.itemconfigure(i, fg='#000000', bg=cbg)
        select2.itemconfigure(i, fg='#000000', bg=cbg)

setSelect()

root.mainloop()