main_gui.py

import tkinter as t
from tkinter import scrolledtext as sct

import Borrow_gui as Borrow
import Return_gui as Return
import Addbook_gui as addbook
import ListSplit_gui as ListSplit

global scrollt
global strbook

#accessing book details from Listsplit_gui.py in form of a List
book_list=ListSplit.listSplit()

strbook=""

#when user adds new books,borrow books,return books then 
#this function will update the scrolltext with the new information
def display_books():
    global scrollt,strbook

    #delete is used to remove old information from scrolltext in order to add updated information
    scrollt.delete(1.0,float(len(strbook)))
    scrollt.update()
    strbook=""
    strbook+="\t------Books Available------\n"
    book_list=ListSplit.listSplit()
    for i in range(ListSplit.count1):
        strbook+="Book name:"+book_list[0][i]+"\n"+"\tAuthor:"+book_list[1][i]+"\n"+"\tQuantity:"+str(book_list[2][i])+"\n"+"\tPrice:Rs"+str(book_list[3][i])+"\n"
    
    #insert is used to display updated information stored in strbook 
    scrollt.insert(t.INSERT,strbook)
    
def load_borrow():

    #calling b_window() method from Borrow_gui.py
    Borrow.b_window()
def load_return():

    #calling r_window() method from Return_gui.py
    Return.r_window()

window=t.Tk()
window.title("Library management system")
window.geometry("550x250")

#resizable prevents the user from maximizing or resizing the window size
window.resizable(0,0)

#####################

# Gets the requested values of the height and width.
windowWidth =600 #change this values to understand how it works
windowHeight =400 
 
# Gets both half the screen width/height and window width/height
positionRight = int(window.winfo_screenwidth()/2 - windowWidth/2)
positionDown = int(window.winfo_screenheight()/2 - windowHeight/2)

# Positions the window in the center of the page.
window.geometry("+{}+{}".format(positionRight, positionDown))
window.geometry("550x250")

######################

l1=t.Label(window,text="Menu",font=("Times New Roman",20,"bold"))
l1.grid(row=0,columnspan=2,pady=10)

b1=t.Button(window,text="Update list",width=15,command=display_books)
b1.grid(row=1,sticky="W",padx=4)

b2=t.Button(window,text="Borrow Books",width=15,command=load_borrow)
b2.grid(row=2,sticky="W",padx=4,pady=4)

b3=t.Button(window,text="Return Books",width=15,command=load_return)
b3.grid(row=3,sticky="W",padx=4,pady=4)

b4=t.Button(window,text="Add books",width=15,command=addbook.addbook)
b4.grid(row=4,sticky="W",padx=4,pady=4)

scrollt=sct.ScrolledText(window,width=50,height=10)
scrollt.grid(row=1,column=1,rowspan=4,columnspan=1)

strbook+="\t------Books Available------\n"
for i in range(ListSplit.count1):
    strbook+="Book name:"+book_list[0][i]+"\n"+"\tAuthor:"+book_list[1][i]+"\n"+"\tQuantity:"+book_list[2][i]+"\n"+"\tPrice:Rs"+book_list[3][i]+"\n"

scrollt.insert(t.INSERT,strbook)

window.mainloop()