Python Tkinter

The Listbox widget is used to display a list of items from which a user can select a number of items.

Syntax:

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

Example:

from Tkinter import *

master = Tk()

listbox = Listbox(master)
listbox.pack()

listbox.insert(END, "a list entry")

for item in ["one", "two", "three", "four"]:
    listbox.insert(END, item)

mainloop()

Here:

• master − This represents the parent window.

• options − Here is the list of most commonly used options for this widget.

There are many options which is given below:

• bg

• bd

• cursor

• Font

• fg

• height

• releif

• selectmode

• width

• selectbackground

Tkinter Menu

The Menu widget is used to implement toplevel, pulldown, and popup menus.

Syntax:

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

Example:

import tkinter as tk
root = Tk()
def hello():
    print "hello!"# create a toplevel menu
menubar = Menu(root)
menubar.add_command(label="Hello!", command=hello)
menubar.add_command(label="Quit!", command=root.quit)

# display the menu
root.config(menu=menubar)

Here:

• master − This represents the parent window.

• options − Here is the list of most commonly used options for this widget.

Now we have creating Pulldown menus:

Example:

root = Tk()
def hello():
    print "hello!"

menubar = Menu(root)

# create a pulldown menu, and add it to the menu bar
filemenu = Menu(menubar, tearoff=0)
filemenu.add_command(label="Open", command=hello)
filemenu.add_command(label="Save", command=hello)
filemenu.add_separator()
filemenu.add_command(label="Exit", command=root.quit)
menubar.add_cascade(label="File", menu=filemenu)

# create more pulldown menus
editmenu = Menu(menubar, tearoff=0)
editmenu.add_command(label="Cut", command=hello)
editmenu.add_command(label="Copy", command=hello)
editmenu.add_command(label="Paste", command=hello)
menubar.add_cascade(label="Edit", menu=editmenu)

helpmenu = Menu(menubar, tearoff=0)
helpmenu.add_command(label="About", command=hello)
menubar.add_cascade(label="Help", menu=helpmenu)

# display the menu
root.config(menu=menubar)

Now we have creating popup menu:

Example:

root = Tk()

def hello():
    print "hello!"# create a popup menu
menu = Menu(root, tearoff=0)
menu.add_command(label="Undo", command=hello)
menu.add_command(label="Redo", command=hello)

# create a canvas
frame = Frame(root, width=512, height=512)
frame.pack()

def popup(event):
    menu.post(event.x_root, event.y_root)

# attach popup to canvas
frame.bind("<Button-3>", popup)