termbox_hello_world.go

package main

import (
	"github.com/nsf/termbox-go"
)

var row int = 0

func echo(str string) {
	x := 0
	for _, v := range str {
		termbox.SetCell(x, row, v, termbox.ColorBlack, termbox.ColorWhite)
		x += rune_width(v)
	}
	row++
	termbox.Flush()
}
func main() {
	err := termbox.Init()
	if err != nil {
		panic(err)
	}
	defer termbox.Close()

	echo("hello,世界!")
	echo("this is a second row")
	termbox.PollEvent()

}

//rune_width is a private function in termbox_common.go
// somewhat close to what wcwidth does, except rune_width doesn't return 0 or
// -1, it's always 1 or 2
func rune_width(r rune) int {
	if r >= 0x1100 &&
		(r <= 0x115f || r == 0x2329 || r == 0x232a ||
			(r >= 0x2e80 && r <= 0xa4cf && r != 0x303f) ||
			(r >= 0xac00 && r <= 0xd7a3) ||
			(r >= 0xf900 && r <= 0xfaff) ||
			(r >= 0xfe30 && r <= 0xfe6f) ||
			(r >= 0xff00 && r <= 0xff60) ||
			(r >= 0xffe0 && r <= 0xffe6) ||
			(r >= 0x20000 && r <= 0x2fffd) ||
			(r >= 0x30000 && r <= 0x3fffd)) {
		return 2
	}
	return 1
}