flit

A Flutter-inspired UI toolkit for Nim. Declarative widgets, real GPU rendering, single codebase for desktop, mobile, web, and embedded.

v0.8.0 BSD-3-Clause Nim 2.0+

Quick start

brew install nim sdl2 harfbuzz
git clone https://github.com/atul1503/flit
cd flit && nimble install
flit create my_app && cd my_app && flit run

Guide

01
Quickstart
Install, your first counter app, flit run
02
Widgets
Stateless, stateful, render objects, lifecycle, keys
03
Layout
Constraints, Row, Column, Stack, Container
04
State
setState, ValueNotifier, ListenableBuilder, InheritedWidget
05
Gestures
Tap, double-tap, pan, scroll wheel
06
Animations
AnimationController, Tween, curves
07
Performance
RepaintBoundary, GpuCanvas, GlCanvas, ListView.builder, HarfBuzz
08
CLI
flit create, run, build, doctor, hot
09
Examples tour
Counter, todo, calculator, gallery, showcase
10
API reference
nim doc workflow, page index, versioning

API reference

Umbrella module
Every public symbol, all modules re-exported
Alphabetical index
Every symbol across every module
Curated landing
Hand-picked entry points

Performance subsystems

flit ships with the perf features Flutter has: GPU shaders, cached layers, lazy lists, HarfBuzz text shaping, and a worker thread pool. See the performance guide for what each does and when to use it.

Examples

Every example is a complete runnable app in the repo at examples/. Clone the repo and run:

nim c -r examples/showcase/main.nim

Repository

Source: github.com/atul1503/flit
Issues: github.com/atul1503/flit/issues