Brightness Control Application

This is a simple brightness control application built with Python and GTK4. It allows users to adjust the brightness of their connected monitors using a graphical interface. The application detects connected displays, and users can select a display and adjust the brightness using a slider or predefined buttons.

Features

• Select from multiple connected monitors.
• Adjust brightness using a horizontal slider.
• Predefined buttons for setting brightness to minimum (20%) or maximum (100%).

Prerequisites

• Python 3.11+
• GTK 4.0+
• The gi Python package (GObject Introspection).
• xrandr installed on your system (used for detecting monitors and adjusting brightness).

Installation

1. Install the required packages:

   On FreeBSD-based systems:

   sudo pkg install python py311-gobject3 gtk4 xrandr 

2. Clone the repository:

   git clone https://github.com/vimanuelt/brightness-control.git
   cd brightness-control

3. Make it executable:

   chmod +x brightness-control.py

4. Run the application:

   ./brightness-control.py

Usage

1. Upon starting the application, it will automatically detect connected monitors via xrandr.
2. Select a monitor from the dropdown list.
3. Use the slider to adjust the brightness, or click the buttons to quickly set the brightness to the minimum or maximum value.
4. The brightness level is displayed as a percentage.

Code Structure

• brightness.py: The main application code, containing the GUI and logic for detecting monitors and adjusting brightness.
• CSS Styling: The application uses embedded CSS for styling, located directly in the code.

How It Works

1. Monitor Detection: The application runs the xrandr command to detect connected displays and their current brightness levels.
2. Brightness Adjustment: Brightness can be adjusted using the xrandr command, specifying the selected output and desired brightness level.

License

This project is licensed under the BSD 3-Clause License. See the LICENSE file for details.