Lecture : Hello world in Tkinter

from tkinter import *


root=Tk()

root.mainloop()

from tkinter import *

root=Tk()
hello = Label(root,text="hello world")


hello.pack()

root.mainloop()

root.geometry("300x400")

Lecture : Understanding Tkinter widgets.

hello = Label(root,text="hello world",font=("Arial", 16), fg="red", bg="white")

Lecture : Button widget

button = Button(root,text="Click here")
button.pack()

button = Button(root,text="Click here",command=display)

def display():
    print('This is a display message')

Lecture : Accepting user Input

from tkinter import *

def display():
    print(entry.get())

root=Tk()
hello = Label(root,text="Enter some text")
hello.pack()

entry = Entry(root)
entry.pack()
button = Button(root,text="Click here",command=display)
button.pack()

root.geometry("300x400")
root.mainloop()

Lecture : Adding two numbers

from tkinter import *

def add():
    n1 = int(number1.get())
    n2 = int(number2.get())
    print(n1+n2)

root=Tk()
hello = Label(root,text="Enter some text")
hello.pack()

number1 = Entry(root)
number1.pack()

number2= Entry(root)
number2.pack()
button = Button(root,text="Click here",command=add)
button.pack()

root.geometry("300x400")
root.mainloop()

from tkinter import *

def add():
    n1 = int(number1.get())
    n2 = int(number2.get())

    result = str(n1+n2)
    answer.config(text="Answer is: "+ result)

root=Tk()
hello = Label(root,text="Enter some text")
hello.pack()

number1 = Entry(root)
number1.pack()

number2= Entry(root)
number2.pack()
button = Button(root,text="Click here",command=add)
button.pack()

answer = Label(root)
answer.pack()


root.geometry("300x400")
root.mainloop()

Lecture : Checkboxes

from tkinter import *

def selected():
    label.config(text=var.get())

root=Tk()

var = BooleanVar()
checkbox = Checkbutton(root,text ="Accept terms", variable=var, command=selected)
checkbox.pack()

label=Label(root)
label.pack()
root.geometry("300x400")
root.mainloop()

from tkinter import *

def selected():

    sugar = sugar_var.get()
    ice = ice_var.get()
    cream = cream_var.get()
    if sugar:
        sugar="sugar"
    else:
        sugar = "no sugar"

    if ice:
        ice="ice"
    else:
        ice = "no ice"

    if cream:
        cream="cream"
    else:
        cream = "no cream"

    print(sugar)
    label.config(text="Options selected are: " +  "\\n"+ sugar + "\\n"+ ice + "\\n"+ cream)

root=Tk()

sugar_var = BooleanVar()
ice_var = BooleanVar()
cream_var  = BooleanVar()

sugar_checkbox = Checkbutton(root,text ="Sugar", variable=sugar_var, command=selected)
sugar_checkbox.pack()

ice_checkbox = Checkbutton(root,text ="Ice", variable=ice_var, command=selected)
ice_checkbox.pack()

cream_checkbox = Checkbutton(root,text ="Cream", variable=cream_var, command=selected)
cream_checkbox.pack()

label=Label(root)
label.pack()
root.geometry("300x400")
root.mainloop()

Lecture : Radiobuttons

from tkinter import *

def selected():
    label.config(text="Choice of fuel is: " + fuel.get())

root=Tk()
# Create a variable to store radiobutton state
fuel =StringVar(value="Petrol")

radio1 = Radiobutton(root,text="Petrol" ,value="Petrol", variable=fuel, command=selected)
radio2 = Radiobutton(root,text="Diesel" ,value="Diesel",variable=fuel, command=selected)
radio3 = Radiobutton(root,text="Electric" ,value="Electric",variable=fuel, command=selected)

label = Label(root)
label.pack()
radio1.pack()
radio2.pack()
radio3.pack()
root.geometry("300x400")
root.mainloop()

Lecture : Frames

from tkinter import *

root=Tk()

root.geometry("300x400")
root.mainloop()

from tkinter import *

root=Tk()

# create a frame object
frame = Frame(root)
frame.pack()

#now let's create another frame
frame2 = Frame(root)
frame2.pack()

#now let's create some widgets and add them to a frame
# instead of adding it to the root window, we will pass frame here
button1 = Button(frame,text="Button1")
button2 = Button(frame2,text="button2")

# we still need to pack these buttons
button1.pack()
button2.pack()

root.geometry("300x400")
root.mainloop()

frame2.pack(side=BOTTOM)

Lecture : Grid layout manager

from tkinter import *

root=Tk()

label1 = Label(root,text='Email')
label2 = Label(root,text="Password")

text1 = Entry(root)
text2 = Entry(root)

label1.grid(row=0,column=0)
label2.grid(row=1,column=0)

text1.grid(row=0,column=1)
text2.grid(row=1,column=1)

button = Button(root,text='Login')
button.grid(row=2,column=1)
root.geometry("300x400")
root.mainloop()

Lecture : Using grid layout manager with frames.

from tkinter import *

root=Tk()


for x in range(3):
    for y in range(3):
        frame = Frame(root)
        
        frame.grid(row=x,column=y)
        
        button = Button(frame,text=f"Row{x} \\n Column{y}")
        
        button.pack()

root.mainloop()

button.pack(padx=5,pady=5)

Lecture : Writing Tkinter code the OOP way.

from tkinter import *

class Demo:


    def __init__(self,rootone):
       
        frame = Frame(rootone)
        frame.pack()
        #as this is a class instead of saying printbutton we use self

        self.printbutton = Button(frame,text='Click Here',command=self.printmessage)
        self.printbutton.pack()

        self.quitbutton = Button(frame,text='Exit',command=frame.quit)
        self.quitbutton.pack()

    
    def printmessage(self):
        print("Button Clicked!")
    

root=Tk()

b = Demo(root)

root.mainloop()

Lecture : Drop down menus

from tkinter import *

def function1():
    print('Menu item clicked')
root=Tk()

mymenu = Menu(root)


root.config(menu=mymenu)


submenu = Menu(mymenu)


mymenu.add_cascade(label="File",menu=submenu)


submenu.add_command(label="Project",command=function1)


submenu.add_command(label="Save",command=function1)

root.mainloop()

Lecture : Adding statusbar

status = Label(root,text="This is the status",bd=1,relief=SUNKEN,anchor=W)
status.pack(side=BOTTOM,fill=X)

Lecture : Toolbar

toolbar = Frame(root,bg='green')
insertbutton = Button(toolbar,text='Insert Files',command=function1)
insertbutton.pack(side=LEFT,padx=2,pady=3)

printbutton = Button(toolbar,text='Print ',command=function1)
printbutton.pack(side=LEFT,padx=2,pady=3)

Lecture 17: Messagebox

import tkinter.messagebox
from tkinter import *

root=Tk()

tkinter.messagebox.showinfo("Title","This is a messagebox")
#ask question inside a messagebox
response = tkinter.messagebox.askquestion("Question1","Do you like coffee")
if response=="yes":
    print('Here is a coffee for you')
root.mainloop()