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Python Tkinter Listbox

by maxguy71

The Listbox widget is used to display a list of items from which a user can select a number of items. In this article we will look at the syntax, parameters, functions, methods and some code examples

Syntax

Here is the simple syntax to create this widget −

w = Listbox ( master, option, ... )

Parameters

    • master − This represents the parent window.
    • options − Here is the list of most commonly used options for this widget. These options can be used as key-value pairs separated by commas.

A list of possible options is given below.

Option Description
bg The background color of the widget.
bd It represents the size of the border. Default value is 2 pixel.
cursor The mouse pointer will look like the cursor type like dot, arrow, etc.
font The font type of the Listbox items.
fg The color of the text.
height It represents the count of the lines shown in the Listbox. The default value is 10.
highlightcolor The color of the Listbox items when the widget is under focus.
highlightthickness The thickness of the highlight.
relief The type of the border. The default is SUNKEN.
selectbackground The background color that is used to display the selected text.
selectmode It is used to determine the number of items that can be selected from the list. It can set to BROWSE, SINGLE, MULTIPLE, EXTENDED.
width It represents the width of the widget in characters.
xscrollcommand It is used to let the user scroll the Listbox horizontally.
yscrollcommand It is used to let the user scroll the Listbox vertically.

Methods

There are the following methods associated with the Listbox.

Method Description
activate(index) This is used to select the lines at the specified index.
curselection() This returns a tuple containing the line numbers of the selected element or elements, counting from 0. If nothing is selected, returns an empty tuple.
delete(first, last = None) This is used to delete the lines which exist in the given range.
get(first, last = None) This is used to get the list items that exist in the given range.
index(i) This is used to place the line with the specified index at the top of the widget.
insert(index, *elements) This is used to insert the new lines with the specified number of elements before the specified index.
nearest(y) This returns the index of the nearest line to the y coordinate of the Listbox widget.
see(index) This is used to adjust the position of the listbox to make the lines specified by the index visible.
size() This returns the number of lines that are present in the Listbox widget.
xview() This is used to make the widget horizontally scrollable.
xview_moveto(fraction) This is used to make the listbox horizontally scrollable by the fraction of width of the longest line present in the listbox.
xview_scroll(number, what) This is used to make the listbox horizontally scrollable by the number of characters specified.
yview() This allows the Listbox to be vertically scrollable.
yview_moveto(fraction) This is used to make the listbox vertically scrollable by the fraction of width of the longest line present in the listbox.
yview_scroll (number, what) This is used to make the listbox vertically scrollable by the number of characters specified.

 

Code examples

from Tkinter import *
import tkMessageBox
import Tkinter

top = Tk()

Lb1 = Listbox(top)
Lb1.insert(1, "France")
Lb1.insert(2, "Germany")
Lb1.insert(3, "UK")
Lb1.insert(4, "USA")
Lb1.insert(5, "Canada")
Lb1.insert(6, "Mexico")

Lb1.pack()
top.mainloop()
from tkinter import *

top = Tk() 
top.title('Python Guides') 
top.geometry('400x300')

var = StringVar()

def showSelected():
    countries = []
    cname = lb.curselection()
    for i in cname:
        op = lb.get(i)
        countries.append(op)
    for val in countries:
        print(val)

show = Label(top, text = "Select Your Country", font = ("Times", 12), padx = 5, pady = 5)
show.pack() 
lb = Listbox(top, selectmode = "multiple")
lb.pack(padx = 5, pady = 5, expand = YES, fill = "both") 

x =["Australia", "Brazil", "Canada","France","Germany",  "Mexico", "UK", "USA"]

for item in range(len(x)): 
	lb.insert(END, x[item]) 
	lb.itemconfig(item, bg="#bdc1d6") 

Button(top, text="Show Selected", command=showSelected).pack()
top.mainloop() 

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