Create a GUI for managing tasks

Here’s a simple Python-based GUI for managing tasks using Tkinter, a standard GUI library included with Python. This app allows users to add, view, mark complete, and delete tasks.

python
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import tkinter as tk
from tkinter import messagebox

class TaskManager:
    def __init__(self, root):
        self.root = root
        self.root.title("Task Manager")
        self.root.geometry("400x500")
        self.tasks = []

        self.task_input = tk.Entry(self.root, font=("Arial", 14), width=25)
        self.task_input.pack(pady=20)

        self.add_button = tk.Button(self.root, text="Add Task", command=self.add_task, width=20, bg="#28a745", fg="white")
        self.add_button.pack()

        self.task_listbox = tk.Listbox(self.root, selectmode=tk.SINGLE, font=("Arial", 12), width=35, height=15)
        self.task_listbox.pack(pady=20)

        self.complete_button = tk.Button(self.root, text="Mark Complete", command=self.mark_complete, width=20, bg="#007bff", fg="white")
        self.complete_button.pack(pady=5)

        self.delete_button = tk.Button(self.root, text="Delete Task", command=self.delete_task, width=20, bg="#dc3545", fg="white")
        self.delete_button.pack(pady=5)

    def add_task(self):
        task = self.task_input.get()
        if task:
            self.tasks.append({"task": task, "completed": False})
            self.update_tasks()
            self.task_input.delete(0, tk.END)
        else:
            messagebox.showwarning("Input Error", "Please enter a task.")

    def update_tasks(self):
        self.task_listbox.delete(0, tk.END)
        for i, task in enumerate(self.tasks):
            display_text = f"[✓] {task['task']}" if task["completed"] else f"[ ] {task['task']}"
            self.task_listbox.insert(tk.END, display_text)

    def mark_complete(self):
        selected = self.task_listbox.curselection()
        if selected:
            index = selected[0]
            self.tasks[index]["completed"] = not self.tasks[index]["completed"]
            self.update_tasks()
        else:
            messagebox.showinfo("Selection Error", "Please select a task to mark complete.")

    def delete_task(self):
        selected = self.task_listbox.curselection()
        if selected:
            del self.tasks[selected[0]]
            self.update_tasks()
        else:
            messagebox.showinfo("Selection Error", "Please select a task to delete.")

if __name__ == "__main__":
    root = tk.Tk()
    app = TaskManager(root)
    root.mainloop()

Features:

• Add Task: Input a task name and click to add it.

• Mark Complete: Toggles a checkmark for task status.

• Delete Task: Removes a selected task from the list.

This script runs as a desktop app. You can expand it with features like saving tasks to a file or using a database. Let me know if you want a web-based version or one using a different GUI framework like PyQt or Kivy.