// SPDX-License-Identifier: Unlicense OR MIT package main // A simple Gio program. See https://gioui.org for more information. import ( "image/color" "log" "os" "gioui.org/app" "gioui.org/io/system" "gioui.org/layout" "gioui.org/op" "gioui.org/text" "gioui.org/widget/material" "gioui.org/font/gofont" ) func main() { go func() { w := app.NewWindow() if err := loop(w); err != nil { log.Fatal(err) } os.Exit(0) }() app.Main() } func loop(w *app.Window) error { th := material.NewTheme(gofont.Collection()) var ops op.Ops for { e := <-w.Events() switch e := e.(type) { case system.DestroyEvent: return e.Err case system.FrameEvent: gtx := layout.NewContext(&ops, e) l := material.H1(th, "Hello, Gio") maroon := color.NRGBA{R: 127, G: 0, B: 0, A: 255} l.Color = maroon l.Alignment = text.Middle l.Layout(gtx) e.Frame(gtx.Ops) } } }