The following article demonstrates a useful trick in Tkinter to create multiple “screens” (e.g. a login screen, register screen, main page screen) within a single window! Instead of creating a new window for each screen, we will use a single tkinter window, which swaps dynamically between multiple “screens” (represented by frames).
This is more efficient and faster than creating a new window every time.
Complete Code:
The core idea is simple, we have multiple classes, each of which represents a window. These classes inherit from the Frame class, essentially making them frames as well. To “swap” between screens, we destroy the existing frame (including all of its children objects) and then create the new frame to take its place.
A YouTube video explaining this code step-by-step is included at the bottom of this article.
import tkinter as tk
def center_window(width, height):
x = (root.winfo_screenwidth() // 2) - (width // 2)
y = (root.winfo_screenheight() // 2) - (height // 2)
root.geometry(f'{width}x{height}+{x}+{y}')
class WelcomeWindow(tk.Frame):
def __init__(self, master):
super().__init__()
self.master = master
self.master.title("Welcome")
center_window(200, 150)
login_button = tk.Button(self, text="Login", width=10, command = self.on_login)
login_button.pack(padx=20, pady=(20, 10))
register_button = tk.Button(self, text="Register", width=10, command = self.on_register)
register_button.pack(pady=10)
self.pack()
def on_login(self):
for widget in self.winfo_children():
widget.destroy()
self.destroy()
LoginWindow(self.master)
def on_register(self):
for widget in self.winfo_children():
widget.destroy()
self.destroy()
RegisterWindow(self.master)
class LoginWindow(tk.Frame):
def __init__(self, master):
super().__init__()
self.master = master
self.master.title("Login")
self.master.resizable(False, False)
center_window(250, 150)
tk.Label(self, text="Username:").grid(row=0, column=0)
self.username_entry = tk.Entry(self)
self.username_entry.grid(row=0, column=1, padx=10, pady=10)
tk.Label(self, text="Password:").grid(row=1, column=0)
self.password_entry = tk.Entry(self, show="*")
self.password_entry.grid(row=1, column=1, padx=10, pady=10)
submit_button = tk.Button(self, text="Submit", width=8,command = self.on_successful_login)
submit_button.grid(row=2, column=1, sticky="e", padx=10, pady=(10, 0))
submit_button = tk.Button(self, text="Back", width=8, command = self.on_back)
submit_button.grid(row=2, column=0, sticky="w", padx=10, pady=(10, 0))
self.pack()
def on_back(self):
for widget in self.winfo_children():
widget.destroy()
self.destroy()
WelcomeWindow(self.master)
def on_successful_login(self):
for widget in self.winfo_children():
widget.destroy()
self.destroy()
MainWindow(self.master)
class RegisterWindow(tk.Frame):
def __init__(self, master):
super().__init__()
self.master = master
self.master.title("Register")
self.master.resizable(False, False)
center_window(300, 250)
tk.Label(self, text="First Name:").grid(row=0, column=0, sticky="w")
self.first_name_entry = tk.Entry(self, width=26)
self.first_name_entry.grid(row=0, column=1, padx=10, pady=10, sticky="e")
tk.Label(self, text="Last Name:").grid(row=1, column=0, sticky="w")
self.last_name_entry = tk.Entry(self, width=26)
self.last_name_entry.grid(row=1, column=1, padx=10, pady=10, sticky="e")
tk.Label(self, text="Password:").grid(row=2, column=0, sticky="w")
self.password_entry = tk.Entry(self, show="*", width=26)
self.password_entry.grid(row=2, column=1, padx=10, pady=10, sticky="e")
tk.Label(self, text="Email:").grid(row=3, column=0, sticky="w")
self.email_entry = tk.Entry(self, width=26)
self.email_entry.grid(row=3, column=1, padx=10, pady=10, sticky="e")
submit_button = tk.Button(self, text="Submit", width=8)
submit_button.grid(row=7, column=1, padx=10, pady=10, sticky="e")
submit_button = tk.Button(self, text="Back", width=8, command = self.on_back)
submit_button.grid(row=7, column=0, sticky="w", padx=10, pady=(10, 10))
self.pack()
def on_back(self):
for widget in self.winfo_children():
widget.destroy()
self.destroy()
WelcomeWindow(self.master)
class MainWindow(tk.Frame):
def __init__(self, master):
super().__init__()
self.master = master
center_window(500, 500)
self.pack()
root = tk.Tk()
root.eval('tk::PlaceWindow . center')
WelcomeWindow(root)
root.mainloop()This marks the end of the Switching between multiple Screens in Tkinter Tutorial. Any suggestions or contributions for CodersLegacy are more than welcome. Questions regarding the tutorial content can be asked in the comments section below.
