mirror of
https://git.sr.ht/~eliasnaur/gio
synced 2026-07-01 07:35:40 +00:00
Elias Naur
e7725a4fa1
Replace it with a dummy event send on the synchronous event channel; a bit of cleverness for a simpler API. Signed-off-by: Elias Naur <mail@eliasnaur.com>
61 lines
1.2 KiB
Go
61 lines
1.2 KiB
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"
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"image/color"
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"log"
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"gioui.org/ui"
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"gioui.org/ui/app"
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"gioui.org/ui/layout"
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"gioui.org/ui/measure"
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"gioui.org/ui/text"
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"golang.org/x/image/font/gofont/goregular"
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"golang.org/x/image/font/sfnt"
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)
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func main() {
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// Never called on mobile, blocks forever on
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// desktop.
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app.Main()
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}
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// On iOS and Android main will never be called, so
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// setting up the window must run in an init function.
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func init() {
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regular, err := sfnt.Parse(goregular.TTF)
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if err != nil {
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panic("failed to load font")
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}
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var faces measure.Faces
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black := &image.Uniform{color.Black}
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face := faces.For(regular, ui.Dp(50))
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// On iOS and Android app.NewWindow blocks, waiting
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// for the platform to create a window.
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go func() {
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w, err := app.NewWindow(nil)
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if err != nil {
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log.Fatal(err)
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}
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for w.IsAlive() {
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e := <-w.Events()
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switch e := e.(type) {
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case app.Draw:
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faces.Cfg = e.Config
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cs := layout.ExactConstraints(w.Size())
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root, _ := (text.Label{Src: black, Face: face, Text: "Hello, World!"}).Layout(cs)
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w.Draw(root)
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faces.Frame()
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}
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}
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if w.Err() != nil {
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log.Fatal(err)
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}
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}()
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}
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