GUI Module (Tkinter)-

  • – It is used to create windows-based GUI application in Python.
  • – tkinter module contains many classes which helps us to develop windows-based application.
  • – Object creation of class Tk provides the result of window.

Ex-

import tkinter
window = tkinter.Tk()
window.mainloop() # This helps us to display a small window.

Layout-

  • – Arrangement of the component on the window.
  • – Few of the component are lable, buttons, entry
  • – Every component has 3 object level methods which are used to layout the window and these are-
  • – pack(self), place(self), grid(self)

Every Component Class Is Having 3 Object Level Methods-

  • 1) pack
  • 2) place
  • 3) grid
 class component:
	def pack(self):
		-----
		-----
	def place(self): #will be used mostly
		-----
		-----
	def grid(self):
		-----
		-----
 component.pack()
 component.place()
 component.grid()
  • We always need to pass the object reference of window as a 1st argument to the constructor of component layout functions.
  • some keywords like = text, fg, bg, font, command

Ex-

from tkinter import Tk, Label
window = Tk()
l = Label(window, text="simpleAlgo", fg="Blue", bg="Yellow", font="25")
l.pack()
window.mainloop()

Geometry()-

  • – geometry is the predefined method of Tk class.
  • – It is used to set the width and height of window.

Ex-

from tkinter import Tk, Button

def demo():
	print("simpleAlgo")
window = Tk()
window.geometry("300x400") #width x height
b = Button(window, text="click Here", command=demo)
b.pack()
window.mainloop()

Ex-

from tkinter import Tk, Button, Label, Entry
def demo():
    name= e.get()
    print(name)

window = Tk()
window.geometry("850x250") #width and Height
l = Label(window, text="Enter Name")
l.place(x=70, y=70)
e = Entry(window, font="Times 20")
e.place(x=300, y=70)
b= Button(window, text="Click Here", command=demo)
b.place(x=700, y=70)
window.mainloop()

Ex-

from tkinter import Tk, Label, StringVar
root = Tk()
obj = StringVar()
l = Label(root, textvariable=obj)
age = input("Enter your age-")
obj.set(age)
l.pack()
root.mainloop()

Ex-

from tkinter import *

def test():
    fn = e1.get()
    ln = e2.get()
    obj.set("Hello "+fn+" "+ln)

window = Tk()
window.geometry("270x150") #width and Height

obj=StringVar()

l1 = Label(window, text = "Enter first name")
l2 = Label(window, text = "Enter last name")
e1 = Entry(window, fg="Blue", font="Courier 10")
e2 = Entry(window, fg="Blue", font="Courier 10")

b1 = Button(window, text="Click Here", command=test)
disp = Label(window, textvariable=obj)

l1.grid(row=0, column=0)
l2.grid(row=1, column=0)
disp.grid(row=2, column=0)
b1.grid(row=3, column=0)

e1.grid(row=0, column=1)
e2.grid(row=1, column=1)

window.mainloop()
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