Tkinter example code for multiple windows why won t buttons load correctly

Question

I am writing a program which should    Open a window with the press of a button  Close the newly opened window with the press of another button    I m using classes so I can insert the code into a larger program later  However  I can t get my buttons to load correctly   import tkinter as tk  class Demo1 tk Frame       def   init   self           tk Frame   init   self          self pack           self master title  Demo 1           self button1   tk Button self  text    Button 1   width   25                                 command   self new window          self button1 grid row   0  column   1  columnspan   2  sticky   tk W tk E tk N tk S       def new window self           self newWindow   Demo2    class Demo2 tk Frame       def   init   self           new   tk Frame   init   self          new   tk Toplevel self          new title  Demo 2           new button   tk Button text    Button 2   width   25                                 command   self close window          new button pack        def close window self           self destroy    def main        Demo1   mainloop    if   name         main         main

User · Answer

I tried to use more than two windows using the Rushy Panchal example above. The intent was to have the change to call more windows with different widgets in them. The butnew function creates different buttons to open different windows. You pass as argument the name of the class containing the window (the second argument is nt necessary, I put it there just to test a possible use. It could be interesting to inherit from another window the widgets in common.

import tkinter as tk

class Demo1:
    def __init__(self, master):
        self.master = master
        self.master.geometry("400x400")
        self.frame = tk.Frame(self.master)
        self.butnew("Window 1", "ONE", Demo2)
        self.butnew("Window 2", "TWO", Demo3)
        self.frame.pack()

    def butnew(self, text, number, _class):
        tk.Button(self.frame, text = text, width = 25, command = lambda: self.new_window(number, _class)).pack()

    def new_window(self, number, _class):
        self.newWindow = tk.Toplevel(self.master)
        _class(self.newWindow, number)


class Demo2:
    def __init__(self, master, number):
        self.master = master
        self.master.geometry("400x400+400+400")
        self.frame = tk.Frame(self.master)
        self.quitButton = tk.Button(self.frame, text = 'Quit', width = 25, command = self.close_windows)
        self.label = tk.Label(master, text=f"this is window number {number}")
        self.label.pack()
        self.quitButton.pack()
        self.frame.pack()

    def close_windows(self):
        self.master.destroy()

class Demo3:
    def __init__(self, master, number):
        self.master = master
        self.master.geometry("400x400+400+400")
        self.frame = tk.Frame(self.master)
        self.quitButton = tk.Button(self.frame, text = 'Quit', width = 25, command = self.close_windows)
        self.label = tk.Label(master, text=f"this is window number {number}")
        self.label.pack()
        self.label2 = tk.Label(master, text="THIS IS HERE TO DIFFERENTIATE THIS WINDOW")
        self.label2.pack()
        self.quitButton.pack()
        self.frame.pack()

    def close_windows(self):
        self.master.destroy()




def main(): 
    root = tk.Tk()
    app = Demo1(root)
    root.mainloop()

if __name__ == '__main__':
    main()

Open the new window only once

To avoid having the chance to press multiple times the button having multiple windows... that are the same window, I made this script (take a look at this page too)

import tkinter as tk


def new_window1():
    global win1
    try:
        if win1.state() == "normal": win1.focus()
    except:
        win1 = tk.Toplevel()
        win1.geometry("300x300+500+200")
        win1["bg"] = "navy"
        lb = tk.Label(win1, text="Hello")
        lb.pack()


win = tk.Tk()
win.geometry("200x200+200+100")
button = tk.Button(win, text="Open new Window")
button['command'] = new_window1
button.pack()
win.mainloop()

User · Answer

I rewrote your code in a more organized  better-practiced way   import tkinter as tk  class Demo1      def   init   self  master           self master   master         self frame   tk Frame self master          self button1   tk Button self frame  text    New Window   width   25  command   self new window          self button1 pack           self frame pack        def new window self           self newWindow   tk Toplevel self master          self app   Demo2 self newWindow   class Demo2      def   init   self  master           self master   master         self frame   tk Frame self master          self quitButton   tk Button self frame  text    Quit   width   25  command   self close windows          self quitButton pack           self frame pack        def close windows self           self master destroy    def main         root   tk Tk       app   Demo1 root      root mainloop    if   name         main         main     Result

User · Answer

You need to specify the master for the second button  Otherwise it will get packed onto the first window  This is needed not only for Button  but also for other widgets and non-gui objects such as StringVar   Quick fix  add the frame new as the first argument to your Button in Demo2   Possibly better  Currently you have Demo2 inheriting from tk Frame but I think this makes more sense if you change Demo2 to be something like this   class Demo2 tk Toplevel            def   init   self           tk Toplevel   init   self          self title  Demo 2           self button   tk Button self  text  Button 2     specified self as master                                 width 25  command self close window          self button pack        def close window self           self destroy     Just as a suggestion  you should only import tkinter once  Pick one of your first two import statements

User · Answer

What you could do is copy the code from tkinter py into a file called mytkinter py  then do this code   import tkinter  mytkinter root   tkinter Tk   window   mytkinter Tk   button   mytkinter Button window  text  Search   width   7                                 command cmd  button2   tkinter Button root  text  Search   width   7                                 command cmdtwo    And you have two windows which don t collide

User · Answer

usr bin env python import Tkinter as tk  from Tkinter import    class windowclass             def   init   self master                   self master   master                 self frame   tk Frame master                  self lbl   Label master   text    Label                   self lbl pack                   self btn   Button master   text    Button    command   self command                   self btn pack                   self frame pack            def command self                   print  Button is pressed                    self newWindow   tk Toplevel self master                  self app   windowclass1 self newWindow   class windowclass1             def   init   self   master                   self master   master                 self frame   tk Frame master                  master title  a                   self quitButton   tk Button self frame  text    Quit   width   25   command   self close window                  self quitButton pack                   self frame pack             def close window self                   self master destroy     root   Tk    root title  window    root geometry  350x50    cls   windowclass root   root mainloop

[python] Tkinter example code for multiple windows, why won't buttons load correctly?

Open the new window only once

Examples related to python

Examples related to class

Examples related to tkinter

Examples related to destroy