{"id":7793,"date":"2020-12-05T09:50:15","date_gmt":"2020-12-05T08:50:15","guid":{"rendered":"https:\/\/pythonprogramming.altervista.org\/?p=7793"},"modified":"2020-12-05T19:09:02","modified_gmt":"2020-12-05T18:09:02","slug":"tkinter-advanced-to-do-app","status":"publish","type":"post","link":"https:\/\/pythonprogramming.altervista.org\/tkinter-advanced-to-do-app\/","title":{"rendered":"Tkinter advanced: to-do app"},"content":{"rendered":"

A todo app with tkinter<\/p>\n

import tkinter as tk\r\nimport tkinter.messagebox as msg\r\nimport os\r\nimport sqlite3\r\n\r\nclass Todo(tk.Tk):\r\n    def __init__(self, tasks=None):\r\n        super().__init__()\r\n\r\n        if not tasks:\r\n            self.tasks = []\r\n        else:\r\n            self.tasks = tasks\r\n\r\n        self.tasks_canvas = tk.Canvas(self)\r\n\r\n        self.tasks_frame = tk.Frame(self.tasks_canvas)\r\n        self.text_frame = tk.Frame(self)\r\n\r\n        self.scrollbar = tk.Scrollbar(self.tasks_canvas, orient=\"vertical\", command=self.tasks_canvas.yview)\r\n\r\n        self.tasks_canvas.configure(yscrollcommand=self.scrollbar.set)\r\n\r\n        self.title(\"To-Do App v3\")\r\n        self.geometry(\"300x400\")\r\n\r\n        self.task_create = tk.Text(self.text_frame, height=3, bg=\"gold\", fg=\"black\")\r\n\r\n        self.tasks_canvas.pack(side=tk.TOP, fill=tk.BOTH, expand=1)\r\n        self.scrollbar.pack(side=tk.RIGHT, fill=tk.Y)\r\n\r\n        self.canvas_frame = self.tasks_canvas.create_window((0, 0), window=self.tasks_frame, anchor=\"n\")\r\n\r\n        self.task_create.pack(side=tk.BOTTOM, fill=tk.X)\r\n        self.text_frame.pack(side=tk.BOTTOM, fill=tk.X)\r\n        self.task_create.focus_set()\r\n\r\n        self.colour_schemes = [{\"bg\": \"lightgrey\", \"fg\": \"black\"}, {\"bg\": \"grey\", \"fg\": \"white\"}]\r\n\r\n        current_tasks = self.load_tasks()\r\n        for task in current_tasks:\r\n            task_text = task[0]\r\n            self.add_task(None, task_text, True)\r\n\r\n        self.bind(\"<Return>\", self.add_task)\r\n        self.bind(\"<Configure>\", self.on_frame_configure)\r\n        self.bind_all(\"<MouseWheel>\", self.mouse_scroll)\r\n        self.bind_all(\"<Button-4>\", self.mouse_scroll)\r\n        self.bind_all(\"<Button-5>\", self.mouse_scroll)\r\n        self.tasks_canvas.bind(\"<Configure>\", self.task_width)\r\n\r\n    def add_task(self, event=None, task_text=None, from_db=False):\r\n        if not task_text:\r\n            task_text = self.task_create.get(1.0, tk.END).strip()\r\n\r\n        if len(task_text) > 0:\r\n            new_task = tk.Label(self.tasks_frame, text=task_text, pady=10)\r\n\r\n            self.set_task_colour(len(self.tasks), new_task)\r\n\r\n            new_task.bind(\"<Button-1>\", self.remove_task)\r\n            new_task.pack(side=tk.TOP, fill=tk.X)\r\n\r\n            self.tasks.append(new_task)\r\n\r\n            if not from_db:\r\n                self.save_task(task_text)\r\n\r\n        self.task_create.delete(1.0, tk.END)\r\n\r\n    def remove_task(self, event):\r\n        task = event.widget\r\n        if msg.askyesno(\"Really Delete?\", \"Delete \" + task.cget(\"text\") + \"?\"):\r\n            self.tasks.remove(event.widget)\r\n\r\n            delete_task_query = \"DELETE FROM tasks WHERE task=?\"\r\n            delete_task_data = (task.cget(\"text\"),)\r\n            self.runQuery(delete_task_query, delete_task_data)\r\n\r\n            event.widget.destroy()\r\n\r\n            self.recolour_tasks()\r\n\r\n    def recolour_tasks(self):\r\n        for index, task in enumerate(self.tasks):\r\n            self.set_task_colour(index, task)\r\n\r\n    def set_task_colour(self, position, task):\r\n        _, task_style_choice = divmod(position, 2)\r\n\r\n        my_scheme_choice = self.colour_schemes[task_style_choice]\r\n\r\n        task.configure(bg=my_scheme_choice[\"bg\"])\r\n        task.configure(fg=my_scheme_choice[\"fg\"])\r\n\r\n    def on_frame_configure(self, event=None):\r\n        self.tasks_canvas.configure(scrollregion=self.tasks_canvas.bbox(\"all\"))\r\n\r\n    def task_width(self, event):\r\n        canvas_width = event.width\r\n        self.tasks_canvas.itemconfig(self.canvas_frame, width = canvas_width)\r\n\r\n    def mouse_scroll(self, event):\r\n        if event.delta:\r\n            self.tasks_canvas.yview_scroll(-1*(event.delta\/120), \"units\")\r\n        else:\r\n            if event.num == 5:\r\n                move = 1\r\n            else:\r\n                move = -1\r\n\r\n            self.tasks_canvas.yview_scroll(move, \"units\")\r\n\r\n    def save_task(self, task):\r\n        insert_task_query = \"INSERT INTO tasks VALUES (?)\"\r\n        insert_task_data = (task,)\r\n        self.runQuery(insert_task_query, insert_task_data)\r\n\r\n    def load_tasks(self):\r\n        load_tasks_query = \"SELECT task FROM tasks\"\r\n        my_tasks = self.runQuery(load_tasks_query, receive=True)\r\n\r\n        return my_tasks\r\n\r\n    @staticmethod\r\n    def runQuery(sql, data=None, receive=False):\r\n        conn = sqlite3.connect(\"tasks.db\")\r\n        cursor = conn.cursor()\r\n        if data:\r\n            cursor.execute(sql, data)\r\n        else:\r\n            cursor.execute(sql)\r\n\r\n        if receive:\r\n            return cursor.fetchall()\r\n        else:\r\n            conn.commit()\r\n\r\n        conn.close()\r\n\r\n    @staticmethod\r\n    def firstTimeDB():\r\n        create_tables = \"CREATE TABLE tasks (task TEXT)\"\r\n        Todo.runQuery(create_tables)\r\n\r\n        default_task_query = \"INSERT INTO tasks VALUES (?)\"\r\n        default_task_data = (\"--- Add Items Here ---\",)\r\n        Todo.runQuery(default_task_query, default_task_data)\r\n\r\n\r\nif __name__ == \"__main__\":\r\n    if not os.path.isfile(\"tasks.db\"):\r\n        Todo.firstTimeDB()\r\n    todo = Todo()\r\n    todo.mainloop()<\/pre>\n
\"\"<\/a><\/p>\n\r\n