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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build example
// +build example
//
// This build tag means that "go install golang.org/x/exp/shiny/..." doesn't
// install this example program. Use "go run main.go board.go xy.go" to run it
// or "go install -tags=example" to install it.
// Goban is a simple example of a graphics program using shiny.
// It implements a Go board that two people can use to play the game.
// TODO: Improve the main function.
// TODO: Provide more functionality.
package main
import (
"flag"
"image"
"log"
"math/rand"
"time"
"golang.org/x/exp/shiny/driver"
"golang.org/x/exp/shiny/screen"
"golang.org/x/mobile/event/key"
"golang.org/x/mobile/event/lifecycle"
"golang.org/x/mobile/event/mouse"
"golang.org/x/mobile/event/paint"
"golang.org/x/mobile/event/size"
)
var scale = flag.Int("scale", 35, "`percent` to scale images (TODO: a poor design)")
func main() {
flag.Parse()
rand.Seed(int64(time.Now().Nanosecond()))
board := NewBoard(9, *scale)
driver.Main(func(s screen.Screen) {
w, err := s.NewWindow(&screen.NewWindowOptions{
Title: "Goban Shiny Example",
})
if err != nil {
log.Fatal(err)
}
defer w.Release()
var b screen.Buffer
defer func() {
if b != nil {
b.Release()
}
}()
for {
switch e := w.NextEvent().(type) {
case lifecycle.Event:
if e.To == lifecycle.StageDead {
return
}
case key.Event:
if e.Code == key.CodeEscape {
return
}
case mouse.Event:
if e.Direction != mouse.DirRelease {
break
}
// Re-map control-click to middle-click, etc, for computers with one-button mice.
if e.Modifiers&key.ModControl != 0 {
e.Button = mouse.ButtonMiddle
} else if e.Modifiers&key.ModAlt != 0 {
e.Button = mouse.ButtonRight
} else if e.Modifiers&key.ModMeta != 0 {
e.Button = mouse.ButtonMiddle
}
if board.click(b.RGBA(), int(e.X), int(e.Y), int(e.Button)) {
w.Send(paint.Event{})
}
case paint.Event:
w.Upload(image.Point{}, b, b.Bounds())
w.Publish()
case size.Event:
// TODO: Set board size.
if b != nil {
b.Release()
}
b, err = s.NewBuffer(e.Size())
if err != nil {
log.Fatal(err)
}
render(b.RGBA(), board)
case error:
log.Print(e)
}
}
})
}
func render(m *image.RGBA, board *Board) {
board.Draw(m)
}
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