Todo List Application Using Tkinter

1. Overview

This application is a Todo List Manager built using Python and Tkinter for the graphical user interface (GUI). It allows users to:

• Add tasks
• Mark tasks as completed
• Edit existing tasks
• Delete selected tasks

The app offers a simple, user-friendly interface with task management features such as scrolling and interactive buttons.

2. Key Features

1. Task Addition

• Users can enter tasks through a text input box.
• Tasks are displayed dynamically, and pressing Enter or clicking the Add button will add them to the list.

2. Task Completion

• Each task has a checkbox that allows users to mark it as completed.
• Completed tasks are displayed with a strikethrough, and the background changes to green, indicating that the task is done.

3. Task Editing

• Users can edit a task by first selecting it (via the checkbox), then clicking the Edit button.
• A dialog box appears, allowing users to update the task's description.

4. Task Deletion

• Selected tasks can be deleted by clicking the Delete button.
• A confirmation message appears to ensure tasks aren't accidentally removed.

3. User Interface

• Scroll-Enabled Task List: The application supports an unlimited number of tasks with a scrollable frame.
• Minimalist Design: The background is styled in a calm blue-grey color (#646683), keeping the focus on tasks.
• Interactive Buttons: Users can add, edit, and delete tasks via buttons or keyboard shortcuts, making it efficient to use.

4. Detailed Walkthrough

1. Adding a Task

When a user enters a task and presses Add, it is:

• Displayed in a new task frame with a checkbox and a label.
• Stored internally for future actions (edit/delete).

2. Completing a Task

By clicking the checkbox, a task is marked as completed:

• The task's text is crossed out (via strikethrough styling).
• The background changes to green, providing visual feedback.

3. Editing a Task

After checking a task, the Edit button allows the user to change its text.

• A popup dialog appears where the user can edit the task.
• Once edited, the task’s checkbox is automatically unchecked.

4. Deleting a Task

By selecting one or more tasks and pressing Delete, the user is asked to confirm the action via a dialog box.

• Upon confirmation, the selected tasks are removed from both the display and the internal storage.

5. Technical Highlights

• Tkinter Framework: Used for building the entire GUI.
• Canvas and Scrollbar: The app uses a scrollable canvas to manage multiple tasks within the same window.
• Dynamic UI Updates: Tasks are dynamically added, edited, or removed in real-time without needing to restart the application.
• Event Binding: The Enter key is bound to the task addition feature, enhancing user interaction.

6. Conclusion

This Todo List application provides a simple yet powerful way to manage tasks efficiently. It leverages Python's Tkinter library for a clean user interface and features robust task management capabilities like adding, editing, completing, and deleting tasks—all within a responsive and scrollable design.