Project #1 - Password Protection: Building Modern GUIs using Python | Full Course | 2025

Key Concepts

• Pi Visual: A UI design and development platform.
• Password Protection App: A project created using Pi Visual to demonstrate UI design and basic password validation.
• UI Design: Creating a modern and visually appealing user interface.
• Event Handling: Attaching events (like button clicks) to UI elements to trigger actions.
• Page Navigation: Switching between different pages within the application.
• PV Store: A store within Pi Visual where users can download and share projects.
• Autosync: A feature to link a local project directory to Pi Visual for automatic updates.

UI Design and Setup

• Creating a New Project: The video starts by creating a new project in Pi Visual named "Password Protection."
• Page Structure: Two pages are created: one for the password input screen (page 0) and another for the welcome screen (page 1).
• UI Elements (Page 0):
  • A circle is added as a background element with a light grayish color (size 250x250, centered).
  • A shield icon is added for visual appeal, with its color set to a lighter shade.
  • Cloud icons are added in the background, also with a grayish color.
  • An input field for the password is added, with the type set to "password" to obscure the input. The height is set to 34.
  • A submit button is added with a blue border and text color, and an icon. The height is set to 34 and the width to 100.
  • An info text field is added to display messages (e.g., "This app is password protected"). Opacity is set to 80%.
  • A solid shield is added behind the lock icon and colored blue.
• UI Elements (Page 1):
  • A "Welcome" vector graphic is added to indicate successful login.
• Importance of Saving: The video emphasizes the importance of saving the project frequently to avoid losing progress.

Coding and Logic

• Naming UI Components: The input field is named "input_password," the submit button is named "button_submit," and the info text is named "text_info."
• Linking to IDE: The project is linked to a local directory using Pi Visual's autosync feature. The absolute path of the directory is used.
• Event Attachment: The attach_events function is used to link the button click event to a Python function.
  • UI.attach_events(page_0, on_click=[(button_submit, validate_password)])
• validate_password Function:
  • Uses functools.partial to pass the UI instance to the validate_password function.
  • Retrieves the user's password input using UI.get_text(page_0, input_password).
  • Compares the user's password with the correct password ("go inside").
  • If the passwords match, it sets the current page to page 1 (UI.pages.set_current_page = 1).
  • If the passwords don't match, it updates the info text field to display "Wrong password."
• Password Input Type: The input type of the password field is set to "password" to obscure the characters entered by the user.

PV Store and Project Sharing

• PV Store Access: The video demonstrates how to access the PV Store from within Pi Visual.
• Downloading Projects: Users can download projects from the PV Store and add them to their local projects.
• Project Logic Included: When downloading a project from the PV Store, the associated code and logic are also included.
• Password Protection App in PV Store: The password protection app created in the video is available for download in the PV Store.

Additional Points

• Homework/Challenge: The video suggests adding an icon to the password input field that toggles the visibility of the password.
• Future Topics: The video mentions future tutorials on animations, data visualization, plots, graphs, and real-time applications using webcams and OpenCV.
• Database Integration: The video briefly mentions the possibility of connecting the password protection app to a database for more secure password management.

Conclusion

The video provides a step-by-step guide to creating a password protection app using Pi Visual. It covers UI design, event handling, page navigation, and project sharing through the PV Store. The project demonstrates the basic principles of UI development and password validation, and it serves as a foundation for more complex applications. The video also highlights the importance of UI design and the ease of use of the Pi Visual platform.