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<!DOCTYPE html>
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< link rel = "shortcut icon" href = "../favicon.png" type = "image/png" >
< link rel = "icon" href = "../favicon.png" type = "image/png" >
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< title > Ebiten example - keyboard< / title >
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< link rel = "stylesheet" href = "/stylesheets/bootstrap.min.css" >
< link rel = "stylesheet" href = "/stylesheets/ebiten.css" >
< header class = "navbar" > < div class = "container" >
< div class = "navbar-header" >
< a class = "navbar-brand" href = "/" > Ebiten< / a >
< / div >
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< nav class = "collapse navbar-collapse" >
< ul class = "nav navbar-nav navbar-right" >
< li > < a href = "https://github.com/hajimehoshi/ebiten" > GitHub< / a > < / li >
< li > < a href = "http://godoc.org/github.com/hajimehoshi/ebiten" > GoDoc< / a > < / li >
< li > < a href = "https://github.com/hajimehoshi/ebiten/wiki" > Wiki< / a >
< / ul >
< / nav >
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< / header >
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< main > < div class = "container" >
< h1 > Ebiten example - keyboard< / h1 >
< iframe src = "keyboard.content.html" width = "640" height = "480" > < / iframe >
< pre > < code > // + build example
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package main
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import (
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" log"
" strconv"
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" github.com/hajimehoshi/ebiten"
" github.com/hajimehoshi/ebiten/ebitenutil"
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" github.com/hajimehoshi/ebiten/examples/keyboard/keyboard"
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)
const (
screenWidth = 320
screenHeight = 240
)
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var keyboardImage *ebiten.Image
func init() {
var err error
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keyboardImage, _, err = ebitenutil.NewImageFromFile(" _resources/images/keyboard/keyboard.png" , ebiten.FilterNearest)
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if err != nil {
log.Fatal(err)
}
}
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var keyNames = map[ebiten.Key]string{
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ebiten.KeyBackspace: " BS" ,
ebiten.KeyComma: " ," ,
ebiten.KeyDelete: " Del" ,
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ebiten.KeyEnter: " Enter" ,
ebiten.KeyEscape: " Esc" ,
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ebiten.KeyPeriod: " ." ,
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ebiten.KeySpace: " Space" ,
ebiten.KeyTab: " Tab" ,
// Arrows
ebiten.KeyDown: " Down" ,
ebiten.KeyLeft: " Left" ,
ebiten.KeyRight: " Right" ,
ebiten.KeyUp: " Up" ,
// Mods
ebiten.KeyShift: " Shift" ,
ebiten.KeyControl: " Ctrl" ,
ebiten.KeyAlt: " Alt" ,
}
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type pressedKeysParts []string
func (p pressedKeysParts) Len() int {
return len(p)
}
func (p pressedKeysParts) Dst(i int) (x0, y0, x1, y1 int) {
k := p[i]
r, ok := keyboard.KeyRect(k)
if !ok {
return 0, 0, 0, 0
}
return r.Min.X, r.Min.Y, r.Max.X, r.Max.Y
}
func (p pressedKeysParts) Src(i int) (x0, y0, x1, y1 int) {
return p.Dst(i)
}
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func update(screen *ebiten.Image) error {
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const offsetX, offsetY = 24, 40
op := & ebiten.DrawImageOptions{}
op.GeoM.Translate(offsetX, offsetY)
op.ColorM.Scale(0.5, 0.5, 0.5, 1)
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if err := screen.DrawImage(keyboardImage, op); err != nil {
return err
}
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pressed := []string{}
for i := 0; i < = 9; i+ + {
if ebiten.IsKeyPressed(ebiten.Key(i) + ebiten.Key0) {
pressed = append(pressed, string(i+ ' 0' ))
}
}
for c := ' A' ; c < = ' Z' ; c+ + {
if ebiten.IsKeyPressed(ebiten.Key(c) - ' A' + ebiten.KeyA) {
pressed = append(pressed, string(c))
}
}
for i := 1; i < = 12; i+ + {
if ebiten.IsKeyPressed(ebiten.Key(i) + ebiten.KeyF1 - 1) {
pressed = append(pressed, " F" + strconv.Itoa(i))
}
}
for key, name := range keyNames {
if ebiten.IsKeyPressed(key) {
pressed = append(pressed, name)
}
}
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op = & ebiten.DrawImageOptions{
ImageParts: pressedKeysParts(pressed),
}
op.GeoM.Translate(offsetX, offsetY)
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if err := screen.DrawImage(keyboardImage, op); err != nil {
return err
}
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return nil
}
func main() {
if err := ebiten.Run(update, screenWidth, screenHeight, 2, " Keyboard (Ebiten Demo)" ); err != nil {
log.Fatal(err)
}
}
< / code > < / pre >
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< / div > < / main >
< footer > < div class = "container" >
< p > © 2013 Hajime Hoshi< / p >
< p > Code is licensed under < a href = "https://github.com/hajimehoshi/ebiten/blob/master/LICENSE" > Apache License 2.0< / a > .< / p >
< p > The content of this page is licensed under < a href = "https://creativecommons.org/licenses/by/4.0/" > the Creative Commons Attribution 4.0 License< / a > .< / p >
< / div > < / footer >
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