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<!DOCTYPE html>
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< meta charset = "utf-8" >
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< meta property = "og:image" itemprop = "image primaryImageOfPage" content = "https://hajimehoshi.github.io/ebiten/images/examples/keyboard.png" >
< meta name = "description" content = "Ebiten example - keyboard" >
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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/highlight-github.css" >
< link rel = "stylesheet" href = "../stylesheets/ebiten.css" >
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< script src = "../scripts/googleanalytics.js" > < / script >
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< nav class = "navbar" > < div class = "container" >
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< nav class = "d-flex flex-row" style = "width: 100%;" >
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< div class = "nav mr-auto" > < a class = "navbar-brand" href = "../" > < img src = "../images/logo_white.svg" alt = "EBITEN" > < / a > < / div >
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< ul class = "nav" >
< li class = "nav-item" > < a class = "nav-link" href = "https://github.com/hajimehoshi/ebiten" > GitHub< / a > < / li >
< li class = "nav-item" > < a class = "nav-link" href = "https://godoc.org/github.com/hajimehoshi/ebiten" > GoDoc< / a > < / li >
< li class = "nav-item" > < a class = "nav-link" href = "https://github.com/hajimehoshi/ebiten/wiki" > Wiki< / a >
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< li class = "nav-item" > < a class = "nav-link" href = "https://ebiten-playground.github.io/" > Playground< / a >
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< / ul >
< / nav >
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< / div > < / nav >
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< main > < div class = "container" >
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< h2 > Ebiten example - keyboard< / h2 >
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< iframe src = "keyboard.content.html" width = "640" height = "480" > < / iframe >
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< div class = "card" > < pre class = "card-body" > < code class = "language-go" > // + 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"
" github.com/hajimehoshi/ebiten/examples/keyboard/keyboard"
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)
const (
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screenWidth = 320
screenHeight = 240
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)
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var keyboardImage *ebiten.Image
func init() {
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var err error
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keyboardImage, _, err = ebitenutil.NewImageFromFile(ebitenutil.JoinStringsIntoFilePath(" _resources" , " images" , " keyboard" , " keyboard.png" ), ebiten.FilterNearest)
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if err != nil {
log.Fatal(err)
}
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}
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var keyNames = map[ebiten.Key]string{
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ebiten.KeyBackspace: " BS" ,
ebiten.KeyComma: " ," ,
ebiten.KeyEnter: " Enter" ,
ebiten.KeyEscape: " Esc" ,
ebiten.KeyPeriod: " ." ,
ebiten.KeySpace: " Space" ,
ebiten.KeyTab: " Tab" ,
ebiten.KeyMinus: " -" ,
ebiten.KeyEqual: " =" ,
ebiten.KeyBackslash: " \\" ,
ebiten.KeyGraveAccent: " `" ,
ebiten.KeyLeftBracket: " [" ,
ebiten.KeyRightBracket: " ]" ,
ebiten.KeySemicolon: " ;" ,
ebiten.KeyApostrophe: " ' " ,
ebiten.KeySlash: " /" ,
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// 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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}
func update(screen *ebiten.Image) error {
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if ebiten.IsRunningSlowly() {
return nil
}
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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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screen.DrawImage(keyboardImage, op)
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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' ))
}
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}
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for c := ' A' ; c < = ' Z' ; c+ + {
if ebiten.IsKeyPressed(ebiten.Key(c) - ' A' + ebiten.KeyA) {
pressed = append(pressed, string(c))
}
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}
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for i := 1; i < = 12; i+ + {
if ebiten.IsKeyPressed(ebiten.Key(i) + ebiten.KeyF1 - 1) {
pressed = append(pressed, " F" + strconv.Itoa(i))
}
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}
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for key, name := range keyNames {
if ebiten.IsKeyPressed(key) {
pressed = append(pressed, name)
}
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}
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op = & ebiten.DrawImageOptions{}
for _, p := range pressed {
op.GeoM.Reset()
r, ok := keyboard.KeyRect(p)
if !ok {
continue
}
op.GeoM.Translate(float64(r.Min.X), float64(r.Min.Y))
op.GeoM.Translate(offsetX, offsetY)
op.SourceRect = & r
screen.DrawImage(keyboardImage, op)
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}
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return nil
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}
func main() {
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if err := ebiten.Run(update, screenWidth, screenHeight, 2, " Keyboard (Ebiten Demo)" ); err != nil {
log.Fatal(err)
}
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}
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< / code > < / pre > < / div >
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< / div > < / main >
< footer > < div class = "container" >
< p > © 2013 Hajime Hoshi< / p >
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< p > Code is licensed under < a href = "https://github.com/hajimehoshi/ebiten/blob/master/LICENSE" > the Apache License 2.0< / a > .< / p >
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< 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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< script src = "../scripts/highlight.pack.js" > < / script >
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< script > hljs . initHighlightingOnLoad ( ) ; < / script >
