How do I compile a MUI app for the web with Emscripten?

Use the -d emscripten flag with V, patch the output .c file using sed to fix waitpid calls, then compile with emcc and specific flags like -s ALLOW_MEMORY_GROWTH. It's experimental and may require adjustments for different setups.

MUI or ImGui for building desktop apps in C?

MUI is better for cross-platform consistency and system theme integration in V/C, while ImGui is immediate-mode and C++-focused with a different performance profile. Choose MUI if you need V language support or native look-and-feel.

Does MUI work on MacOS for basic applications?

Basic widget drawing and click handling should function, but themes and screen reader support won't work, and there may be MacOS-specific bugs, as noted in the README. It's not fully tested or supported.

What's the best way to prevent UI freezing in MUI with long tasks?

Run processes over 0.2s concurrently using V's go routines, as per the README suggestions. This keeps the UI responsive, especially for dialogs or heavy computations.

Can I use MUI with the TCC compiler on Windows?

Yes, but with limitations: webview submodule doesn't work, and you need full winapi from a specific download. Follow the FAQ steps to set up TCC, but GCC is recommended for full functionality.

How to add tray icons to MUI applications?

Use the external VTray library, as MUI doesn't have built-in tray support but is interoperable with it. Check the VTray GitHub for integration details and report any issues.

Open-Awesome

mui

Apache-2.0V

A cross-platform UI library for V and C, supporting Windows, Linux, Android, and Web with native widgets and system themes.

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What is mui?

MUI is a cross-platform UI library for the V and C programming languages that allows developers to create native applications for Windows, Linux, Android, and the web. It provides a comprehensive set of widgets, system theme integration, and accessibility features to build modern desktop and mobile interfaces with a single codebase.

Target Audience

Developers using V or C who need to build native, cross-platform desktop or mobile applications with a consistent UI toolkit and minimal dependencies.

Value Proposition

MUI offers a lightweight, performant alternative to heavier UI frameworks, with built-in support for system themes, accessibility, and experimental web targets—all while maintaining a simple API and native look-and-feel across platforms.

Overview

A Cross-Platform UI Library

Use Cases

Best For

Building cross-platform desktop applications in V or C
Creating native Android apps with V language tooling
Developing lightweight web applications via WebAssembly/Emscripten
Prototyping UI concepts with system theme integration
Adding accessible UI components to existing C projects
Embedding web content in desktop apps via webview windows

Not Ideal For

Applications requiring full MacOS compatibility with system themes and screen reader support
Production web apps that depend on stable system theme integration and map widgets
Teams wanting a plug-and-play UI library without platform-specific compilation steps
Projects needing extensive third-party widget ecosystems with finished custom support

Pros & Cons

Pros

Cross-Platform Reach

Supports Windows, Linux, Android, and Web via Emscripten from a single codebase, enabling broad deployment without rewriting UI logic.

Rich Widget Library

Includes over 20 built-in components like graphs, code editors, and maps, reducing reliance on external libraries for common UI needs.

System Theme Integration

Automatically adapts to system accent colors and dark/light modes with fallbacks, providing a native look without manual styling effort.

Experimental Accessibility

Offers screen reader support for Linux/Windows and Japanese input, advancing inclusivity in V/C UI development, though labeled as experimental.

Cons

Platform Feature Gaps

System themes and map widgets are broken on Android and Web, and MacOS support is partial with untested themes and screen readers, limiting consistency.

Complex Web Compilation

Compiling for web requires patching output with sed and multiple Emscripten commands, making it cumbersome for quick prototyping or deployment.

Incomplete Extensibility

Custom widget and dialog support is marked as not finished completely, hindering advanced customization and plugin development.

Frequently Asked Questions

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