{"id":6159,"date":"2020-06-19T05:57:51","date_gmt":"2020-06-19T03:57:51","guid":{"rendered":"https:\/\/pythonprogramming.altervista.org\/?p=6159"},"modified":"2021-01-03T09:18:06","modified_gmt":"2021-01-03T08:18:06","slug":"more-windows-with-tkinter-new-version","status":"publish","type":"post","link":"https:\/\/pythonprogramming.altervista.org\/more-windows-with-tkinter-new-version\/","title":{"rendered":"More windows with tkinter (new version)"},"content":{"rendered":"\n

How open more windows on tkinter, the module to create graphic user intefaces with python, and make them open only once (new version of this post<\/a>).<\/p>\n\n\n\n

The code<\/h2>\n\n\n\n
import tkinter as tk\n\n\nclass Win1:\n    def __init__(self, master):\n        self.master = master\n        self.master.geometry(\"400x300\")\n        self.show_widgets()\n\n    def show_widgets(self):\n        self.frame = tk.Frame(self.master)\n        self.master.title(\"Window n.1\")\n        self.create_button(\"Click to open Window 2\", Win2)\n        self.create_button(\"Click to open Window 3\", Win3)\n        self.frame.pack()\n\n    def create_button(self, text, _class):\n        \"Button that creates a new window\"\n        tk.Button(\n            self.frame, text=text,\n            command=lambda: self.new_window(_class)).pack()\n\n    def new_window(self, _class):\n            global win2, win3\n\n            try:\n                if _class == Win2:\n                    if win2.state() == \"normal\":\n                        win2.focus()\n            except:  \n                win2 = tk.Toplevel(self.master)\n                _class(win2)\n\n            try:\n                if _class == Win3:\n                    if win3.state() == \"normal\":\n                        win3.focus()\n            except:  \n                win3 = tk.Toplevel(self.master)\n                _class(win3)\n\n    def close_window(self):\n        self.master.destroy()\n\nclass Win2(Win1):\n\n    def show_widgets(self):\n        \"A frame with a button to quit the window\"\n        self.master.title(\"Window 2\")\n        self.frame = tk.Frame(self.master, bg=\"red\")\n        self.quit_button = tk.Button(\n            self.frame, text=f\"Quit this window n. 2\",\n            command=self.close_window)\n        self.quit_button.pack()\n        self.create_button(\"Open window 3 from window 2\", Win3)\n        self.frame.pack()\n\n\n\nclass Win3(Win2):\n\n    def show_widgets(self):\n        self.master.title(\"Window 3\")\n        self.frame = tk.Frame(self.master, bg=\"green\")\n        self.quit_button = tk.Button(\n            self.frame, text=f\"Quit this window n. 3\",\n            command=self.close_window)\n        self.label = tk.Label(\n            self.frame, text=\"THIS IS ONLY IN THE THIRD WINDOW\")\n        self.label.pack()\n        self.frame.pack()\n\n\n\nroot = tk.Tk()\napp = Win1(root)\nroot.mainloop()<\/pre>\n\n\n\n
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