Tkinter, a GUI module that comes with the Python standard library, is used to create cross-platform GUI apps. This module is simple and lightweight as compared to other GUI modules. Tkinter provides a widget called Toplevel that is used to create top-level windows. In this answer, we will learn to use the Toplevel widget.
Toplevel()
Let us take a look at an example.
#import tkinter module
import tkinter as tk
#create window
window = tk.Tk()
#provide size to window
window.geometry("600x600")
#function to create top level widget
def display_toplevel():
top = tk.Toplevel(window)
top.geometry("300x300")
tk.Label(top, text="Hello From Educative !!!").pack()
top.mainloop()
#button to trigger creation of top level widget
tk.Button(window, text = "Click to open top level window", command = display_toplevel).pack()
window.mainloop()Line 5: We create an instance of the Tkinter class Tk() and assign it to a variable window.
Line 8: We set the window size as 600x600.
Line 11-15: We declare and define a function display_toplevel() to create a top-level widget. In this function, we create a top-level widget, set the widget size, and assign a text label to it.
Line 18: We create a button widget to display a top-level widget when it is clicked. We will call the function display_toplevel when the button is clicked.
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