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Tip_Calculator.pyw
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Tip_Calculator.pyw
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'''
WHAT WE WILL CREATE
=======================
This is a simple application that will enable us to calculate the percentage of a bill or something.
So let's say, you are in a restaurant and you had your meal, the service was very good and you decided that you wanted to leave a tip.
let's say you wanted to give a 20% tip so all you need to do is click on the 20% Radio Button and click Calculate.
It will provide you the exact Tip Amount and the Total Billing Amount along with the added tip.
'''
'''
tkinter is a python module that is is used to build the user interface.
we'll only import what we need from our tkinter module.
things we needed to build :
1. Tk : it is used to build the application window
2. Radiobutton : to make checkbox type button
3. button : normal button
4. lable : to form text
5. stringvar : a var of string typr to input string var when we work on the tkinter then we have to specify the type of data you expect in that particular wigets.
6. Intvar : to take input as integer
7. entry : for taking input
'''
# here we will create a class and the main application container.
# container is a window that going to house the application.
'''
from tkinter import *
#if u are not sure u can import the whole module like the above.
'''
from tkinter import Tk, Radiobutton, Button, Label, StringVar, IntVar, Entry
class TipCalculator(): # created a class
# this method in the class is a built in function in python and is always executed when the class is being initiated.
def __init__(self):
# we can use this init function to assign values to the object properties.
# self parameter is used to access the variables from the class.
window = Tk()
# tk is a class from tkinter module which is used to create the application window.
window.title("Tip Calculator Application")
window.configure(background="pink")
window.geometry("390x320")
window.resizable(width=False, height=False)
# some methods(data members) which is used in the program which is accessable through self parameter
#self.var_name = datatypes()
self.meal_cost = StringVar()
self.tip_percent = IntVar()
self.tip = StringVar()
self.total_cost = StringVar()
# lables for creating the text fields and their configurations
tip_percent = Label(window, text="Tip Percentage",
bg="yellow", fg="black")
tip_percent.grid(column=0, row=0, padx=15, pady=30)
bill_amount = Label(window, text="Bill Amount",
bg="orange", fg="black")
bill_amount.grid(column=1, row=0, padx=15, pady=30)
bill_amount_entry = Entry(
window, textvariable=self.meal_cost, width=14)
bill_amount_entry.grid(column=2, row=0, padx=15, pady=30)
# radiobuttons for the % with configurations
five_percent_tip = Radiobutton(
window, text="05%", variable=self.tip_percent, value=5)
five_percent_tip.grid(column=0, row=1)
ten_percent_tip = Radiobutton(
window, text="10%", variable=self.tip_percent, value=10)
ten_percent_tip.grid(column=0, row=2)
fifteen_percent_tip = Radiobutton(
window, text="15%", variable=self.tip_percent, value=15)
fifteen_percent_tip.grid(column=0, row=3)
twenty_percent_tip = Radiobutton(
window, text="20%", variable=self.tip_percent, value=20)
twenty_percent_tip.grid(column=0, row=4)
twentyfive_percent_tip = Radiobutton(
window, text="25%", variable=self.tip_percent, value=25)
twentyfive_percent_tip.grid(column=0, row=5)
tip_amount_lb1 = Label(window, text="Tip Amount",
bg="brown", fg="white")
tip_amount_lb1.grid(column=1, row=3, padx=15)
tip_amount_entry = Entry(window, textvariable=self.tip, width=14)
tip_amount_entry.grid(column=2, row=3)
bill_total_lb1 = Label(window, text="Total Bill Amount",
bg="blue", fg="white")
bill_total_lb1.grid(column=1, row=5, padx=15)
bill_total_entry = Entry(
window, textvariable=self.total_cost, width=14)
bill_total_entry.grid(column=2, row=5)
calculate_btn = Button(window, text="Calculate",
bg="light green", fg="black", command=self.calculate)
calculate_btn.grid(column=1, row=7, padx=25, pady=25)
clear_btn = Button(window, text="Clear",
bg="dark blue", fg="white", command=self.clear)
clear_btn.grid(column=2, row=7, padx=25, pady=25)
window.mainloop()
# function for calculating the tip amount and the total amount
def calculate(self):
pre_tip = float(self.meal_cost.get())
percentage = self.tip_percent.get() / 100
tip_amount_entry = pre_tip * percentage
self.tip.set(tip_amount_entry)
final_bill = pre_tip + tip_amount_entry
self.total_cost.set(final_bill)
# function for clearing the function
def clear(self):
self.total_cost.set("")
self.meal_cost.set("")
self.tip.set("")
TipCalculator()