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< meta property = "og:image" itemprop = "image primaryImageOfPage" content = "https://hajimehoshi.github.io/ebiten/images/examples/typewriter.png" >
< meta name = "description" content = "Ebiten example - typewriter" >
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< title > Ebiten example - typewriter< / title >
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< script src = "../scripts/googleanalytics.js" > < / script >
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< nav class = "d-flex flex-row" style = "width: 100%;" >
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< li class = "nav-item" > < a class = "nav-link" href = "https://github.com/hajimehoshi/ebiten" > GitHub< / a > < / li >
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< / ul >
< / nav >
< / div > < / nav >
< main > < div class = "container" >
< h2 > Ebiten example - typewriter< / h2 >
< iframe src = "typewriter.content.html" width = "640" height = "480" > < / iframe >
< div class = "card" > < pre class = "card-body" > < code class = "language-go" > // + build example
package main
import (
" log"
" strings"
" github.com/hajimehoshi/ebiten"
" github.com/hajimehoshi/ebiten/ebitenutil"
)
var (
text = " Type on the keyboard:\n"
counter = 0
bsPrevPressed = false
)
func update(screen *ebiten.Image) error {
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// Add a string from InputChars, that returns string input by users.
// Note that InputChars result changes every frame, so you need to call this
// every frame.
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text + = string(ebiten.InputChars())
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// Adjust the string to be at most 10 lines.
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ss := strings.Split(text, " \n" )
if len(ss) > 10 {
text = strings.Join(ss[len(ss)-10:], " \n" )
}
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// If the enter key is pressed, add a line break.
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if ebiten.IsKeyPressed(ebiten.KeyEnter) & & !strings.HasSuffix(text, " \n" ) {
text + = " \n"
}
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// If the backspace key is pressed, remove one character.
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bsPressed := ebiten.IsKeyPressed(ebiten.KeyBackspace)
if !bsPrevPressed & & bsPressed {
if len(text) > = 1 {
text = text[:len(text)-1]
}
}
bsPrevPressed = bsPressed
counter+ +
if ebiten.IsRunningSlowly() {
return nil
}
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// Blink the cursor.
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t := text
if counter%60 < 30 {
t + = " _"
}
ebitenutil.DebugPrint(screen, t)
return nil
}
func main() {
if err := ebiten.Run(update, 320, 240, 2.0, " Typewriter (Ebiten Demo)" ); err != nil {
log.Fatal(err)
}
}
< / code > < / pre > < / div >
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< p > © 2013 Hajime Hoshi< / p >
< 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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< script src = "../scripts/highlight.pack.js" > < / script >
< script > hljs . initHighlightingOnLoad ( ) ; < / script >
