forked from joejulian/gio
Elias Naur
ea082c5cca
The new name emphasize the nature of the programs and won't be confused with package `app`. Signed-off-by: Elias Naur <mail@eliasnaur.com>
62 lines
1.2 KiB
Go
62 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/color"
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"log"
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"gioui.org/app"
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"gioui.org/layout"
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"gioui.org/op"
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"gioui.org/op/paint"
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"gioui.org/text"
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"gioui.org/text/shape"
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"gioui.org/unit"
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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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go func() {
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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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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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family := &shape.Family{
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Regular: regular,
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}
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maroon := color.RGBA{127, 0, 0, 255}
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message := "Hello, Gio"
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gtx := &layout.Context{
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Queue: w.Queue(),
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}
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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 app.DestroyEvent:
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return e.Err
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case app.UpdateEvent:
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gtx.Reset(&e.Config, e.Size)
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var material op.MacroOp
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material.Record(gtx.Ops)
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paint.ColorOp{Color: maroon}.Add(gtx.Ops)
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material.Stop()
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text.Label{Material: material, Size: unit.Sp(72), Alignment: text.Middle, Text: message}.Layout(gtx, family)
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w.Update(gtx.Ops)
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}
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}
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}
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