Welcome folks today in this blog post we will be building an area of rectangle gui desktop app using math module in tkinter using python. All the full source code of application is given below.

Get Started

In order to get started you need to make an app.py file and copy paste the following code

app.py

import tkinter
import math

root = tkinter.Tk()

root.title('Ractangle')
root.geometry("600x400")
root.configure(bg="white")
root.resizable(0,0)


label_heading = tkinter.Label(root, text="Calculate Area of Ractangle ",bg="white")
label_heading.config(font=("OpenSans", 15))
label_heading.pack()

label_blank1 = tkinter.Label(root,bg="white")
label_blank1.config()
label_blank1.pack()


def ractangle_result():
    num1 = int(side1.get())
    num2 = int(side2.get())
    area = (num1 + num2 ) *2
    label_area.config(text = "Area: "+str(area))


#creating top frame
frame = tkinter.Frame(root,bg="white")
frame.config()
frame.pack()

frameLeft = tkinter.Frame(frame,bg="white")
frameLeft.config()
frameLeft.pack(side=tkinter.LEFT)

label_blank2 = tkinter.Label(frame,bg="white",text="  ")
label_blank2.config()
label_blank2.pack(side=tkinter.LEFT)
        
frameCenter = tkinter.Frame(frame,bg="white")
frameCenter.config()
frameCenter.pack(side=tkinter.LEFT)

label_blank3 = tkinter.Label(frame,bg="white",text="  ")
label_blank3.config()
label_blank3.pack(side=tkinter.LEFT)

frameRight = tkinter.Frame(frame,bg="white")
frameRight.config()
frameRight.pack(side=tkinter.LEFT)

side1= tkinter.StringVar()
side2 = tkinter.StringVar()


#adding controls to left frame
label_left = tkinter.Label(frameLeft, text="Enter side 1:",bg="white")
label_left.config(font=("OpenSans", 15))
label_left.pack()
entry1 = tkinter.Entry(frameLeft, textvariable=side1)
entry1.pack()
        

#Creating Canvas Using Center frame
        
convas = tkinter.Canvas(frameCenter, bg='white', width=150, height=200, bd=0, relief='ridge')
convas.pack()
convas.create_line(20, 20, 20, 180)
convas.create_line(20, 180, 140, 180)
convas.create_line(140, 180,140, 20)
convas.create_line(140, 20,20,20)
        
label_center = tkinter.Label(frameCenter, text="Enter side 2:",bg="white")
label_center.config(font=("OpenSans", 15))
label_center.pack()

entry2 = tkinter.Entry(frameCenter, textvariable=side2)
entry2.pack()

        

#Creating Right Frame for result
        
label_area = tkinter.Label(frameRight, text="Area: ?",bg="white",width = 20)
label_area.config(font=("OpenSans", 15))
label_area.pack()


label_right = tkinter.Button(frameRight, text="Find Result", bg="white",fg="blue",command = ractangle_result)
label_right.config(font=("OpenSans", 15))
label_right.pack(pady = 30)

root.mainloop()

Now if you execute the python  script by typing the below command as shown below

python app.py