frontend.py

from tkinter import *
import backend
def get_selected_row(event):
    try:
        global selected_tuple
        index=list1.curselection()[0]
        selected_tuple=list1.get(index)
        e1.delete(0,END)
        e1.insert(END,selected_tuple[1])
        e2.delete(0,END)
        e2.insert(END,selected_tuple[2])
        e3.delete(0,END)
        e3.insert(END,selected_tuple[3])
        e4.delete(0,END)
        e4.insert(END,selected_tuple[4])
    except IndexError:
        pass
    


def view_command():
    list1.delete(0,END)
    for row in backend.view():
        list1.insert(END,row)

def search_command():
    list1.delete(0,END)
    for row in backend.search(title_text.get(),author_text.get(),year_text.get(),isbn_text.get()):
        list1.insert(END,row)

def add_command():
    backend.insert(title_text.get(),author_text.get(),year_text.get(),isbn_text.get())
    list1.delete(0,END)
    list1.insert(END,(title_text.get(),author_text.get(),year_text.get(),isbn_text.get()))


def delete_command():
    backend.delete(selected_tuple[0])

def update_command():
    backend.update(selected_tuple[0],title_text.get(),author_text.get(),year_text.get(),isbn_text.get())

window =Tk()

window.title("BookStore")

l1 = Label(window,text="Title")
l1.grid(row =0 ,column=0)

l2 = Label(window,text="Author")
l2.grid(row =0 ,column=2)

l3 = Label(window,text="Year")
l3.grid(row =1 ,column=0)

l4 = Label(window,text="ISBN")
l4.grid(row =1 ,column=2)

title_text=StringVar()
e1 = Entry(window,textvariable=title_text)
e1.grid(row =0,column=1)

author_text=StringVar()
e2 = Entry(window,textvariable=author_text)
e2.grid(row =0,column=3)

year_text=StringVar()
e3 = Entry(window,textvariable=year_text)
e3.grid(row =1,column=1)

isbn_text=StringVar()
e4 = Entry(window,textvariable=isbn_text)
e4.grid(row =1,column=3)

list1 = Listbox(window,height=6,width=35)
list1.grid(row=2,column=0,rowspan=6,columnspan=2)

sb1 = Scrollbar(window)
sb1.grid(row = 2 ,column = 2,rowspan=6)

list1.configure(yscrollcommand =sb1.set)
sb1.configure(command=list1.yview)

list1.bind('<<ListboxSelect>>',get_selected_row)

b1 = Button(window,text="view all",width =12 ,command=view_command)
b1.grid(row=2,column=3)

b2 = Button(window,text="Search entry",width = 12,command=search_command)
b2.grid(row=3,column=3)

b3 = Button(window,text="Add entry",width = 12,command=add_command)
b3.grid(row=4,column=3)

b4 = Button(window,text="Update selected",width = 12,command=update_command)
b4.grid(row=5,column=3)

b5 = Button(window,text="Delete selected",width = 12,command=delete_command)
b5.grid(row=6,column=3)

b6 = Button(window,text="close",width = 12 ,command=window.destroy)
b6.grid(row=7,column=3)



window.mainloop()