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

• 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

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);
}

Browser Demo

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

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

Pull requests adding additional functionality are welcome, along bug requests. However, the new functionality must require to be directly implemented into the library. Functionality which can be implemented easily outside of MicroUI should not be contributed with.

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