Themenator — Themes and Theme Switcher Widget for egui

Themenator provides Catppuccin color palettes for ready-made themes, packaged as a widget for egui.

It allows egui applications to switch between Latte, Frappé, Macchiato, and Mocha at runtime, with the selected theme automatically persisted across app restarts.

Features

• Full Catppuccin palettes (Latte / Frappé / Macchiato / Mocha)
• Complete egui Style and Visuals integration
• Correct light / dark base theme handling
• Runtime theme switching
• Persistent theme storage across app restarts
• Theme selector buttons
• Builder pattern for clean, fluent configuration
• Runs on Linux, Mac, Windows, WebAssembly (wasm) and Raspberry Pi

Live wasm demo app

The wasm demo app runs in your web browser.

Screenshots

Quick Start

Add egui-widget-themenator as a dependency in your Cargo.toml file:

[dependencies]
egui_widget_themenator = 0.2

Add the theme widget:

ui.add(ThemeWidget::new().label("Theme selector:"));
);

The theme automatically:

• Adds an icon indicating light or dark mode
• Icon is clickable and cycles through themes Applies all Catppuccin color styling
• Switches between light and dark mode
• Persists the selected theme across restarts

Platform Support

• Linux
• macOS
• Windows
• WebAssembly (wasm)
• Raspberry Pi 5 with Touchscreen

License

Licensed under either of:

• Apache License, Version 2.0 (LICENSE-APACHE)
• MIT License (LICENSE-MIT)

at your option.

Author

Made with ❤️ by Rob @ White Rabbit Scientific.

Inspired by modern design tools and clean UI patterns.

Star this repo if you like it! ⭐️