microui

Sat, 28 Jun 2025 15:28:15 +0800

rxi/microui

A tiny, portable, immediate-mode UI library written in ANSI C

Features

Tiny: around 1100 sloc of ANSI C
Works within a fixed-sized memory region: no additional memory is allocated
Built-in controls: window, scrollable panel, button, slider, textbox, label, checkbox, wordwrapped text
Works with any rendering system that can draw rectangles and text
Designed to allow the user to easily add custom controls
Simple layout system

Example

if (mu_begin_window(ctx, "My Window", mu_rect(10, 10, 140, 86))) {
  mu_layout_row(ctx, 2, (int[]) { 60, -1 }, 0);

  mu_label(ctx, "First:");
  if (mu_button(ctx, "Button1")) {
    printf("Button1 pressed\n");
  }

  mu_label(ctx, "Second:");
  if (mu_button(ctx, "Button2")) {
    mu_open_popup(ctx, "My Popup");
  }

  if (mu_begin_popup(ctx, "My Popup")) {
    mu_label(ctx, "Hello world!");
    mu_end_popup(ctx);
  }

  mu_end_window(ctx);
}

Screenshot

Browser Demo

Usage

See doc/usage.md for usage instructions
See the demo directory for a usage example

Notes

The library expects the user to provide input and handle the resultant drawing commands, it does not do any drawing itself.

Contributing

The library is designed to be lightweight, providing a foundation to which you can easily add custom controls and UI elements; pull requests adding additional features will likely not be merged. Bug reports are welcome.

License

This library is free software; you can redistribute it and/or modify it under the terms of the MIT license. See LICENSE for details.

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