Add Golang-based Gio example code

Golang and Gio should be considered as an alternative to the current C-
and SDL-based setup.

1 files changed, 49 insertions, 0 deletions

diff --git a/go/main.go b/go/main.go
new file mode 100644
index 0000000..5c4c213
--- /dev/null
+++ b/go/main.go
@@ -0,0 +1,49 @@
+package main
+
+import (
+	"image/color"
+	"log"
+	"os"
+
+	"gioui.org/app"
+	"gioui.org/font/gofont"
+	"gioui.org/io/system"
+	"gioui.org/layout"
+	"gioui.org/op"
+	"gioui.org/text"
+	"gioui.org/widget/material"
+)
+
+func main() {
+	go func() {
+		w := app.NewWindow()
+		err := run(w)
+		if err != nil {
+			log.Fatal(err)
+		}
+		os.Exit(0)
+	}()
+	app.Main()
+}
+
+func run(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)
+
+			title := material.H1(th, "Hello, Gio")
+			maroon := color.NRGBA{R: 127, G: 0, B: 0, A: 255}
+			title.Color = maroon
+			title.Alignment = text.Middle
+			title.Layout(gtx)
+
+			e.Frame(gtx.Ops)
+		}
+	}
+}