frontend.py

Python-programming-3/frontend.py

@@ -1,102 +1,106 @@
 from tkinter import *
-import backend
+import backend  # Make sure this module is correctly defined
 
 def get_selected_row(event):
     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])
+    try:
+        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  # Handle case when no item is selected
 
 def view_command():
-    list1.delete(0,END)
+    list1.delete(0, END)
     for row in backend.view():
-        list1.insert(END,row)
+        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)
+    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()))
+    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()))
+    clear_entries()  # Clear entry fields after adding
 
 def delete_command():
-    backend.delete(selected_tuple[0])
+    try:
+        backend.delete(selected_tuple[0])
+        clear_entries()  # Clear entry fields after deleting
+    except NameError:
+        pass  # Handle case when no item is selected
 
 def update_command():
-    backend.update(selected_tuple[0],title_text.get(),author_text.get(),year_text.get(),isbn_text.get())
-
-window=Tk()
-
+    try:
+        backend.update(selected_tuple[0], title_text.get(), author_text.get(), year_text.get(), isbn_text.get())
+    except NameError:
+        pass  # Handle case when no item is selected
+
+def clear_entries():
+    """Clear all entry fields."""
+    e1.delete(0, END)
+    e2.delete(0, END)
+    e3.delete(0, END)
+    e4.delete(0, END)
+
+window = Tk()
 window.wm_title("BookStore")
 
-l1=Label(window,text="Title")
-l1.grid(row=0,column=0)
-
-l2=Label(window,text="Author")
-l2.grid(row=0,column=2)
+# Labels
+Label(window, text="Title").grid(row=0, column=0)
+Label(window, text="Author").grid(row=0, column=2)
+Label(window, text="Year").grid(row=1, column=0)
+Label(window, text="ISBN").grid(row=1, column=2)
 
-l3=Label(window,text="Year")
-l3.grid(row=1,column=0)
+# Entry fields
+title_text = StringVar()
+e1 = Entry(window, textvariable=title_text)
+e1.grid(row=0, column=1)
 
-l4=Label(window,text="ISBN")
-l4.grid(row=1,column=2)
+author_text = StringVar()
+e2 = Entry(window, textvariable=author_text)
+e2.grid(row=0, column=3)
 
-title_text=StringVar()
-e1=Entry(window,textvariable=title_text)
-e1.grid(row=0,column=1)
+year_text = StringVar()
+e3 = Entry(window, textvariable=year_text)
+e3.grid(row=1, column=1)
 
-author_text=StringVar()
-e2=Entry(window,textvariable=author_text)
-e2.grid(row=0,column=3)
+isbn_text = StringVar()
+e4 = Entry(window, textvariable=isbn_text)
+e4.grid(row=1, column=3)
 
-year_text=StringVar()
-e3=Entry(window,textvariable=year_text)
-e3.grid(row=1,column=1)
+# Listbox and scrollbar
+list1 = Listbox(window, height=6, width=35)
+list1.grid(row=2, column=0, rowspan=6, columnspan=2)
 
-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)
+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)
+list1.bind('<<ListboxSelect>>', get_selected_row)
 
-b2=Button(window,text="Search entry", width=12,command=search_command)
-b2.grid(row=3,column=3)
+# Buttons
+Button(window, text="View all", width=12, command=view_command).grid(row=2, column=3)
+Button(window, text="Search entry", width=12, command=search_command).grid(row=3, column=3)
+Button(window, text="Add entry", width=12, command=add_command).grid(row=4, column=3)
+Button(window, text="Update selected", width=12, command=update_command).grid(row=5, column=3)
+Button(window, text="Delete selected", width=12, command=delete_command).grid(row=6, column=3)
+Button(window, text="Close", width=12, command=window.destroy).grid(row=7, 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)
-
-f1=Label(window,text="Created By : Gaurav Kumar")
-f1.grid(row=8,column=1,columnspan=4)
+# Footer
+Label(window, text="Created By : Gaurav Kumar").grid(row=8, column=1, columnspan=4)
 
 window.mainloop()
+