{"id":8247,"date":"2021-01-12T21:26:37","date_gmt":"2021-01-12T20:26:37","guid":{"rendered":"https:\/\/pythonprogramming.altervista.org\/?p=8247"},"modified":"2021-01-12T21:31:08","modified_gmt":"2021-01-12T20:31:08","slug":"tkinter-advanced-code-to-make-a-todo-app","status":"publish","type":"post","link":"https:\/\/pythonprogramming.altervista.org\/tkinter-advanced-code-to-make-a-todo-app\/","title":{"rendered":"Tkinter advanced: code to make a todo app"},"content":{"rendered":"\n

Here is a little app <\/strong>to make a todo <\/strong>list. It’s a new <\/strong>version of this one<\/a>. I decided to use a class <\/strong>to make the window and an external module <\/strong>for the functions that can make the app work. You can add <\/strong>items and delete <\/strong>them. When you close the app and you open it back you will have the item retrieved <\/strong>from a txt file saved by the app.<\/p>\n\n\n\n

\"\"<\/a>
The output of the GUI made with tkinter<\/figcaption><\/figure>\n\n\n\n

The code consist of a main file and another in a folder called todo_scripts<\/strong>.<\/p>\n\n\n\n

The main <\/strong>file is this, where there is the window <\/strong>with its widgets<\/strong><\/p>\n\n\n\n

<\/code><\/pre>\n\n\n\n
import tkinter as tk\nimport os\nfrom todo_script.todo_functions import*\n \n\nclass Window:\n    def __init__(self):\n        self.root = tk.Tk()\n        # self.root.geometry(\"0x0+500+10\")\n        self.root.title(\"To do list in Python\")\n        self.root.configure(bg=\"green\")\n        self.widgets_builder()\n        # Grab the saved data\n        getdata(self)\n        self.binding()\n        self.root.mainloop()\n\n    def widgets_builder(self):\n        self.label1()\n        self.entry1()\n        self.listbox()\n        self.label2()\n\n    def label1(self):\n        self.lab1 = tk.Label(\n            self.root, text=\"Enter to add items, \\nSelect to delete Items,\\n ctr+s to save\",\n            bg=\"gold\")\n        self.lab1.pack(fill=\"both\")\n\n    def entry1(self):     \n        self.v = tk.StringVar()\n        self.entry = tk.Entry(self.root, textvariable=self.v, font=24)\n        self.entry.pack(fill=\"both\")\n        self.entry.focus()\n         \n    def listbox(self):\n        self.lv = tk.Variable()\n        self.lst = tk.Listbox(self.root, listvariable=self.lv)\n        self.lst.pack(fill=tk.BOTH, expand=1)\n\n    def label2(self): \n        self.label = tk.Label(self.root, text=\"Press enter to add an item\",\n            bg=\"gold\")\n        self.label.pack(fill=\"both\")\n        \n    def binding(self):\n        self.lst.bind(\"<Double-Button>\", lambda x: delete(x, self))\n        self.entry.bind(\"<Return>\", lambda x: add(x, self))\n        self.root.bind(\"<Control-s>\", lambda x: save(x, self))\n        # substitute the &lt; with and angular parenthesis\n         \nWindow()\n\n\n\n<\/pre>\n\n\n\n
The file in the todo_script <\/strong>folder, called todo_functions.py <\/strong>is this, with the main functions to add, save, delete and retrieve the data made with the app<\/p>\n\n\n\n
import os\nimport tkinter as tk\n\n\ndef add(event, self):\n    \"add item to listbox with entry when Return is pressed\"\n \n    self.lst.insert(tk.END, self.entry.get())\n    self.v.set(\"\")\n    save(\"\", self)\n \n \ndef delete(event, self):\n    \"deletes items in listbox with double click on item\"\n\n    self.lst.delete(tk.ANCHOR)\n    save(\"\", self)\n \n \ndef save(event, self):\n    \"saves memos in listbox\"\n\n    with open(\"data.txt\", \"w\") as file:\n        file.write(\"\\n\".join(self.lv.get()))\n    self.label[\"text\"] = \"Data saved\"\n \n \ndef getdata(self):\n    \"grab saved data\"\n    \n    if \"data.txt\" in os.listdir():\n        with open(\"data.txt\") as file:\n            for line in file:\n                self.lst.insert(tk.END, line.strip())<\/pre>\n\n\n\n
The program is not complicated, so the code could have been contained in just one file, but I think that it is a good role to follow to make things organized and simple, so that if you want to make a bigger app out of this starting point, you can easily figure out how it works, even after many days after you do not looked after this code.<\/p>\n\n\n\n
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