Listbox with Scrollbar

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December 21st, 2012, 11:25 AM

xsilvergs

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Join Date: Dec 2012

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Listbox with Scrollbar

Hi.
New to Python so sorry if obvious question but after a day I can't work out the answer. The code below produces a scrollable listbox but I can't work out how to read the displayed value for use in an equation. I hope to have a few of these eventually.
Here is my code:

Code:

from Tkinter import *
master = Tk()

scrollbarKG = Scrollbar(master)
scrollbarKG.grid(row=0, column=1, sticky='NS')

listboxKG = Listbox(master, selectmode=SINGLE, yscrollcommand=scrollbarKG.set, height=1, width='3')
for i in xrange(50, 150):
    listboxKG.insert(END, i)
listboxKG.grid(row=0, column=0)
scrollbarKG.config(command=listboxKG.yview)
mainloop()

There will probably be a button to click once all data has been selected via the listboxes.
Thanks in advance for any help.

December 21st, 2012, 12:42 PM

b49P23TIvg

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Does this Scale widget reference help?

http://effbot.org/tkinterbook/scale.htm

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December 21st, 2012, 01:43 PM

xsilvergs

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Quote:

Does this Scale widget reference help?

I'll take a look, this is all very new.

December 21st, 2012, 01:56 PM

xsilvergs

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Join Date: Dec 2012

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Hum!

Not really what I want. In this instance the idea was for the user to select their weight, anything between 50 and 150 Kgs. Their weight would then go into an equation.

I was trying this as opposed to them entering their weight and then having to error check to ensure it was a integer etc.

EDIT:
A Spinbox may work but once again how do you get the value?

Hope that gives more info.

December 21st, 2012, 04:13 PM

dwblas

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Generally you bind ListboxSelect to a callback then use curselection()

Code:

from Tkinter import *

def get_weight(event):
    index = listboxKG.curselection()  
    value = listboxKG.get(index)
    print index, value

master = Tk()
master.geometry("100x100")

scrollbarKG = Scrollbar(master)
scrollbarKG.grid(row=0, column=1, sticky='NS')

listboxKG = Listbox(master, selectmode=SINGLE, yscrollcommand=scrollbarKG.set, height=5, width='3')
for i in xrange(50, 150):
    listboxKG.insert(END, i)
listboxKG.grid(row=0, column=0)
listboxKG.bind('<<ListboxSelect>>', get_weight)

scrollbarKG.config(command=listboxKG.yview)

mainloop()

If you install the PMW extension to Tkinter and use the ScrolledListBox you won't have to mess with adding scroll bars.

Last edited by dwblas : December 21st, 2012 at 04:19 PM.

December 21st, 2012, 04:18 PM

xsilvergs

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Join Date: Dec 2012

Posts: 7

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Like this:

Code:

from Tkinter import *
import tkMessageBox

master = Tk()
def helloCallBack():
   tkMessageBox.showinfo( "Hello Python", var.get())
   
var = StringVar()
w = Spinbox(master, from_=50, to=150, textvariable=var, state="readonly")
w.pack()

e = Button(master, text='press', border='2', command = helloCallBack)
e.pack()

mainloop()

A bit messy but proves a point I think so will try again tomorrow. If anyone has any ideas please chip in.

Listbox with Scrollbar

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