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Documentation

This code is used by https://olhar.media/ in production.

Overview

This documentation is aimed at programmers who are unfamiliar with the codebase. It explains the purpose and functionality of each file and class in detail.

Dependencies

Ensure the following dependencies are installed:

  • PyQt5
  • requests
  • qrcode
  • geopy
  • darkdetect
  • screen-brightness-control

Install the dependencies using:

pip install PyQt5 requests qrcode geopy darkdetect screen-brightness-control

main.py

Purpose

The main.py file is the entry point of the application. It initializes the main components and starts the event loop.

Main Class

  • Initialization (__init__):

    • Creates an instance of Services to interact with external services.
    • Initializes the main application window (App).
    • Sets up a timer to periodically update the video list and UI.

  • Starting the Application (start):

    • Enters the Qt main event loop to start the application.

application.py

Purpose

The application.py file contains the main application window, which manages the user interface and interactions.

App Class

  • Initialization (__init__):

    • Sets up the application window with a title and full-screen mode.
    • Initializes the Services class to get the current city.
    • Configures logging to record application events.
    • Sets up the central widget and layout for the UI components.
    • Adds a video player, message label, and QR code label to the layout.
    • Initializes the video list and diagnostic menu.

  • QR Code Generation (create_qr_code):

    • Generates a QR code from a given URL.

  • Message Display (show_message, hide_message):

    • Shows or hides the message label.

  • QR Code Display (show_qr_code, hide_qr_code):

    • Shows or hides the QR code label.

  • Video Management (load_video_list, play_next_video):

    • Loads the video list from the service and plays the next video in the list.

  • Video Status Check (check_video_status):

    • Checks the media player status and updates the UI accordingly.

  • Video Ended Signal (send_video_ended_signal):

    • Sends a signal to the server when a video ends.

services.py

Purpose

The services.py file provides services related to location and screen brightness.

Services Class

  • Initialization (__init__):

    • Initializes the service class without any parameters.

  • Location Retrieval (get_current_city, get_lat_lon, get_location):

    • Gets the current latitude and longitude.
    • Retrieves the city name based on the latitude and longitude.

  • Screen Brightness (set_brightness):

    • Adjusts the screen brightness based on whether it's day or night.

video_player.py

Purpose

The video_player.py file contains the video player component that plays videos.

VideoPlayer Class

  • Initialization (__init__):

    • Sets up the video player UI components.
    • Initializes the media player and connects it to the video widget.

  • Playing Videos (show_local_video):

    • Plays a local video file and handles any errors that occur.

  • Media Status Check (check_status):

    • Checks the media player status and emits a finished signal when a video ends.