how to use tkinter library for python.md

How to use tkinter library for python

tkinter provides us with a variety of common GUI elements which we can use to build our interface – such as buttons, menus and various kinds of entry fields and display areas.

Window

Import the Tkinter package, we will create a window and set its title:

from tkinter import *
 
window = Tk()
 
window.title("Welcome to LikeGeeks app")
 
window.mainloop()

Size Window Set the size of a window

window.geometry('350x200')

Label

Create a label widget

lbl = Label(window, text="Hello")

Set its position in the form using the grid function with its location, in this way:

lbl.grid(column=0, row=0)

Set label font size

Change font type

lbl = Label(window, text="Hello", font=("Arial Bold", 24))

Button

Add a button

btn = Button(window, text="Click Me")
 
btn.grid(column=1, row=0)

Events

Manage the event click of a button

1. We will write the function that we need to execute when the button is clicked:

def clicked():
 
    lbl.configure(text="Button was clicked !!")

Link the event to the button

btn = Button(window, text="Click Me", command=clicked)

Entry (Tkinter textbox)

1. Create a text box using the Tkinter Entry class in this way:

txt = Entry(window,width=10)

To use the entered text, it is saved by a function def clicked ()

 def clicked():
    res = "Welcome to " + txt.get()
    lbl.configure(text= res)

Checkbutton (Tkinter checkbox)

chk = Checkbutton(window, text='Option')

chk_state = IntVar()
 
chk_state.set(0) #uncheck
 
chk_state.set(1) #check

Radio button

rad1 = Radiobutton(window,text='First', value=1, variable=selected)

Get the value of the radio button

def clicked():
 
   print(selected.get())

MessageBox

from tkinter import messagebox
 
messagebox.showinfo('Message title','Message content')

Shows warning message

messagebox.showwarning('Message title', 'Message content')

Shows error message

messagebox.showerror('Message title', 'Message content')

SpinBox

A Spinbox widget and pass the parameters from_ and to to specify the range of numbers of the Spinbox.

spin = Spinbox(window, from_=0, to=100, width=5)

Add a menu bar

To add a menu bar, you can use the menu class:

from tkinter import Menu
 
menu = Menu(window)
 
menu.add_command(label='File')
 
window.config(menu=menu)

You can add the menu items, in any menu, with the add_cascade () function:

menu.add_cascade(label='File', menu=new_item)

Thank you