lemna

This is an alpha quality release. Don't expect much!

A Reactive UI framework for Rust

Features: - React(or Elm, etc.)-esque stateful UI - Flexbox-like layout engine - Configurable rendering targets (currently just wgpu, which offers cross-platform GPU-accelerated rendering) - Configurable windowing backends (winit, wx-rs) - Cross platform - Components can be built using a combination of other components and graphical primitives that map well to GPU renderers. - State and render-state is cached, so state changes only trigger recompute of the relevant nodes - Built in components/widgets: - Div, a scrollable container - Button, a button that supports tool tips - RadioButtons, arrays of selectable buttons - Toggle, a simple state-toggling button - Text, some text - TextBox, a box for entering text - Selection, a dropdown menu - RoundedRect, a stylable-rectangle - OpenIconic icons built-in - wgpu rendering backend batches primitives together to use few calls out to wgpu (which makes it a lot faster than things that don't do this!) - nih-plug support in the lemna-nih-plug package

What's missing: - A way for handling global styles - Raster (image) rendering support - More robust and more widgets (e.g. text selection support on Text widget)

Running

Select your preferred windowing backend: cargo run -p lemna-baseview --example hello

cargo run -p lemna-wx-rs --example hello

cargo run -p lemna-winit --example scroll

See ./backends/**/**examples for other examples. Note that wx-rs presently has compilation limitations on most platforms, and winit does not handle many events. The Baseview backend is not on cargo (because baseview itself is not) but