spot

Spot is a simple, cross-platform, reactive GUI toolkit for Go using native widgets where available. It is designed to be easy to use and to provide a consistent API across different platforms.

Features

• Simple: You can add Spot as a simple dependency to your project and start building your UI right away. No need to use additional tools or code generation steps. Just write Go code and get a native GUI application as a self-contained binary.
• Cross-platform: Spot uses native widgets where available and automatically selects the best backend for the platform you are running on at compile time. Currently, two backend implementations are provided: one based on FLTK using go-fltk and one based on Cocoa using (a modified version of) gocoa.
• Reactive: Spot automatically updates the UI when the state of the application changes. You just provide side-effect free rendering functions and manage the state of your application using the UseState hook.
• Broad widget support: Spot provides a wide range of UI controls out of the box, including buttons, labels, text inputs, sliders, dropdowns, and more. See the full list: List of supported UI controls.

package main

import (
	"fmt"

	"github.com/roblillack/spot"
	"github.com/roblillack/spot/ui"
)

func main() {
	ui.Init()

	spot.MountFn(func(ctx *spot.RenderContext) spot.Component {
		counter, setCounter := spot.UseState[int](ctx, 0)

		buttonTitle := "Click me!"
		if counter > 0 {
			buttonTitle = fmt.Sprintf("Clicked %d times!", counter)
		}

		return &ui.Window{
			Title:  "Hello World!",
			Width:  200,
			Height: 125,
			Children: []spot.Component{
				&ui.Button{
					X: 25, Y: 50, Width: 150, Height: 25,
					Title: buttonTitle,
					OnClick: func() {
						setCounter(counter + 1)
					},
				},
			},
		}
	})

	ui.Run()
}