Tkinter

Creating and configuring widgets

from tkinter import *
from tkinter import ttk

root = Tk()
button = ttk.Button(root, text = 'Click Me')
button.pack()

button['text']     # 'Click Me'

button['text'] = 'Press Me'
button.config(text = 'Push Me')
button.config()

ttk.Label(root, text='Hello Tkinter!').pack()

Managing widget placement

Tk Geometry Managers

• Pack
• Grid
• Place

Handling User Events

Configuting Event Handlers

• Command callbacks Available for interactive widgets that produce events Configure by setting widget's "command" property ex) Button

• Event bindings Used for events that do not have a command callback Configure by using widget's "bind" method

Sample

#!/usr/bin/python3
# hello_local.py by Barron Stone
# This is an exercise file from Python GUI Development with Tkinter on lynda.com

from tkinter import *
from tkinter import ttk

class HelloApp:

    def __init__(self, master):

        self.label = ttk.Label(master, text = "Hello, Tkinter!")
        self.label.grid(row = 0, column = 0, columnspan = 2)

        ttk.Button(master, text = "Texas",
                   command = self.texas_hello).grid(row = 1, column = 0)

        ttk.Button(master, text = "Hawaii",
                   command = self.hawaii_hello).grid(row = 1, column = 1)

    def texas_hello(self):
        self.label.config(text = 'Howdy, Tkinter!')

    def hawaii_hello(self):
        self.label.config(text = 'Aloha, Tkinter!')


def main():            

    root = Tk()
    app = HelloApp(root)
    root.mainloop()

if __name__ == "__main__": main()