forked from joejulian/gio
Elias Naur
f5985b5e7d
Add os.Exit to examples now that app.Main never returns. Signed-off-by: Elias Naur <mail@eliasnaur.com>
52 lines
892 B
Go
52 lines
892 B
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package main
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// A simple Gio program. See https://gioui.org for more information.
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import (
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"image/color"
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"log"
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"os"
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"gioui.org/app"
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"gioui.org/io/system"
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"gioui.org/layout"
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"gioui.org/op"
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"gioui.org/text"
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"gioui.org/widget/material"
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"gioui.org/font/gofont"
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)
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func main() {
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go func() {
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defer os.Exit(0)
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w := app.NewWindow()
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if err := loop(w); err != nil {
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log.Fatal(err)
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}
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}()
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app.Main()
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}
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func loop(w *app.Window) error {
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th := material.NewTheme(gofont.Collection())
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var ops op.Ops
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for {
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e := <-w.Events()
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switch e := e.(type) {
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case system.DestroyEvent:
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return e.Err
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case system.FrameEvent:
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gtx := layout.NewContext(&ops, e)
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l := material.H1(th, "Hello, Gio")
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maroon := color.RGBA{127, 0, 0, 255}
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l.Color = maroon
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l.Alignment = text.Middle
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l.Layout(gtx)
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e.Frame(gtx.Ops)
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}
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}
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}
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