'''
Created on Aug 20, 2017
@author: Aditya
This program demonstrates the use of button widget in tkinter
'''
import tkinter as tk
from tkinter import ttk
class ButtonApp:
def __init__(self, master):
self.button = ttk.Button(master, text = 'Click me')
self.button.pack()
self.button.config(command = self.buttonfunc) # configure a command for button click
self.btn1 = ttk.Button(master, text = 'Click on \'Click me\'', command = self.invokebutton)
self.btn1.pack()
self.btn2 = ttk.Button(master, text = 'Disable \'Click me\'', command = self.disableButton)
self.btn2.pack()
self.btn3 = ttk.Button(master, text = 'Enable \'Click me\'', command = self.enableButton)
self.btn3.pack()
self.btn4 = ttk.Button(master, text = 'Query state of \'Click me\'', command = self.queryButtonState)
self.btn4.pack()
self.button.img = tk.PhotoImage(file = 'simple_gif.gif')
self.button.img = self.button.img.subsample(10, 10) # take every 5th pixel in x and y direction of image
self.btn5 = ttk.Button(master, text = 'Add image to \'Click me\'', command = self.addImage)
self.btn5.pack()
self.label = ttk.Label(master, text = 'No button pressed yet.')
self.label.pack()
def buttonfunc(self):
self.label.config(text = 'Clicked!!')
def invokebutton(self):
self.button.invoke() # invoke the button
def disableButton(self):
if self.button.instate(['disabled']):
self.label.config(text='\'Click me\' is already disabled.')
else:
self.button.state(['disabled']) # returns the previous state of button and sets the new state
self.label.config(text = '\'Click me\' is disabled.')
def queryButtonState(self):
if self.button.instate(['disabled']):
self.label.config(text = '\'Click me\' is in diabled state.')
else:
self.label.config(text = '\'Click me\' is in enabled state.')
def enableButton(self):
if self.button.instate(['!disabled']):
self.label.config(text = '\'Click me\' is already enabled')
else :
self.button.state(['!disabled'])
self.label.config(text = '\'Click me\' is enabled')
def addImage(self):
self.button.config(image = self.button.img, compound = tk.LEFT)
def launchButtonApp():
root = tk.Tk() # instantiate the main window class by creating its object
ButtonApp(root)
tk.mainloop()
def test():
launchButtonApp()
if __name__ == '__main__': test()
