Create a new window in tkinter

pythonprogramming

This code explains to you how you can make a new window from a root window. This is the most simple code you can make. From this one you can make as many window as you want.

To make them you need:

  • a call to new_window method inside the Win class (with a button for example) for each window
  • to make a class (Win1 for example) for each window
import tkinter as tk


class Win:
    def __init__(self, root):
        """Define window for the app"""
        self.root = root
        self.root.geometry("400x300")
        self.root["bg"] = "coral"
        self.button_rename = tk.Button(self.root, text = "New window",
            command= lambda: self.new_window(Win2)).pack()

    def new_window(self, _class):
        self.new = tk.Toplevel(self.root)
        _class(self.new)

class Win2:
    def __init__(self, root):
        self.root = root
        self.root.geometry("300x300+200+200")
        self.root["bg"] = "navy"

if __name__ == "__main__":
    root = tk.Tk()
    app = Win(root)
    app.root.title("Lezioni")
    root.mainloop()

Avoiding opening the same window more than once

There could be a problem: you can open as many window like Win2 as many times as you press the button, but what if you want only one of this window and not myltiple ones? You can change the code of the new_window:

    def new_window(self, _class):
        try:
            if self.new.state() == "normal":
                self.new.focus()
        except:
            self.new = tk.Toplevel(self.root)
            _class(self.new)

The whole code:

import tkinter as tk


class Win:
    def __init__(self, root):
        """Define window for the app"""
        self.root = root
        self.root.geometry("400x300")
        self.root["bg"] = "coral"
        self.button_rename = tk.Button(self.root, text = "New window",
            command= lambda: self.new_window(Win2)).pack()

    def new_window(self, _class):
        try:
            if self.new.state() == "normal":
                self.new.focus()
        except:
            self.new = tk.Toplevel(self.root)
            _class(self.new)

class Win2:
    def __init__(self, root):
        print(app.new.state())
        self.root = root
        self.root.geometry("300x300+200+200")
        self.root["bg"] = "navy"

if __name__ == "__main__":
    root = tk.Tk()
    app = Win(root)
    app.root.title("Lezioni")
    root.mainloop()

Without buttons

If you want to open the window without buttons…

import tkinter as tk

def new_window(_class):
        new = tk.Toplevel(win)
        _class(new)

class Win2:
    def __init__(self, root):
        self.root = root
        self.root.geometry("300x300+500+200")
        self.root["bg"] = "navy"

def nw():
	new_window(Win2)

win = tk.Tk()
win.geometry("200x200+200+100")
button = tk.Button(win, text="New Window")
button['command'] = nw
button.pack()

text = tk.Text(win, bg='cyan')
text.pack()
new_window(Win2)

win.mainloop()

 

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