<!DOCTYPE html> <meta charset="utf-8"> <meta property="og:image" itemprop="image primaryImageOfPage" content="https://hajimehoshi.github.io/ebiten/images/examples/typewriter.png"> <meta name="description" content="Ebiten example - typewriter"> <link rel="shortcut icon" href="../favicon.png" type="image/png" > <link rel="icon" href="../favicon.png" type="image/png" > <title>Ebiten example - typewriter</title> <link rel="stylesheet" href="../stylesheets/bootstrap.min.css"> <link rel="stylesheet" href="../stylesheets/highlight-github.css"> <link rel="stylesheet" href="../stylesheets/ebiten.css"> <script src="../scripts/googleanalytics.js"></script> <nav class="navbar"><div class="container"> <nav class="d-flex flex-row" style="width: 100%;"> <div class="nav mr-auto"><a class="navbar-brand" href="../"><img src="../images/logo_white.svg" alt="EBITEN"></a></div> <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> <li class="nav-item"><a class="nav-link" href="https://ebiten-playground.github.io/">Playground</a> </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 { // 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. text += string(ebiten.InputChars()) // Adjust the string to be at most 10 lines. ss := strings.Split(text, "\n") if len(ss) > 10 { text = strings.Join(ss[len(ss)-10:], "\n") } // If the enter key is pressed, add a line break. if ebiten.IsKeyPressed(ebiten.KeyEnter) && !strings.HasSuffix(text, "\n") { text += "\n" } // If the backspace key is pressed, remove one character. 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 } // Blink the cursor. 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> </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">the 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> <script src="../scripts/highlight.pack.js"></script> <script>hljs.initHighlightingOnLoad();</script>