ebiten/docs/examples/keyboard.html

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<!DOCTYPE html>
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<script src="../scripts/force-https.js"></script>
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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">
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<link rel="stylesheet" href="../stylesheets/ebiten.css">
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<header class="navbar"><div class="container">
<div class="navbar-header">
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<a class="navbar-brand" href="..">Ebiten</a>
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</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>
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<li><a href="https://godoc.org/github.com/hajimehoshi/ebiten">GoDoc</a></li>
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<li><a href="https://github.com/hajimehoshi/ebiten/wiki">Wiki</a>
</ul>
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</header>
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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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<pre><code class="language-go">// &#43;build example
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package main
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import (
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&#34;log&#34;
&#34;strconv&#34;
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&#34;github.com/hajimehoshi/ebiten&#34;
&#34;github.com/hajimehoshi/ebiten/ebitenutil&#34;
&#34;github.com/hajimehoshi/ebiten/examples/keyboard/keyboard&#34;
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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
keyboardImage, _, err = ebitenutil.NewImageFromFile(&#34;_resources/images/keyboard/keyboard.png&#34;, ebiten.FilterNearest)
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: &#34;BS&#34;,
ebiten.KeyComma: &#34;,&#34;,
ebiten.KeyDelete: &#34;Del&#34;,
ebiten.KeyEnter: &#34;Enter&#34;,
ebiten.KeyEscape: &#34;Esc&#34;,
ebiten.KeyPeriod: &#34;.&#34;,
ebiten.KeySpace: &#34;Space&#34;,
ebiten.KeyTab: &#34;Tab&#34;,
// Arrows
ebiten.KeyDown: &#34;Down&#34;,
ebiten.KeyLeft: &#34;Left&#34;,
ebiten.KeyRight: &#34;Right&#34;,
ebiten.KeyUp: &#34;Up&#34;,
// Mods
ebiten.KeyShift: &#34;Shift&#34;,
ebiten.KeyControl: &#34;Ctrl&#34;,
ebiten.KeyAlt: &#34;Alt&#34;,
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}
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type pressedKeysParts []string
func (p pressedKeysParts) Len() int {
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return len(p)
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}
func (p pressedKeysParts) Dst(i int) (x0, y0, x1, y1 int) {
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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
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}
func (p pressedKeysParts) Src(i int) (x0, y0, x1, y1 int) {
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return p.Dst(i)
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}
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func update(screen *ebiten.Image) error {
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const offsetX, offsetY = 24, 40
op := &amp;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 &lt;= 9; i&#43;&#43; {
if ebiten.IsKeyPressed(ebiten.Key(i) &#43; ebiten.Key0) {
pressed = append(pressed, string(i&#43;&#39;0&#39;))
}
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}
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for c := &#39;A&#39;; c &lt;= &#39;Z&#39;; c&#43;&#43; {
if ebiten.IsKeyPressed(ebiten.Key(c) - &#39;A&#39; &#43; ebiten.KeyA) {
pressed = append(pressed, string(c))
}
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}
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for i := 1; i &lt;= 12; i&#43;&#43; {
if ebiten.IsKeyPressed(ebiten.Key(i) &#43; ebiten.KeyF1 - 1) {
pressed = append(pressed, &#34;F&#34;&#43;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 = &amp;ebiten.DrawImageOptions{
ImageParts: pressedKeysParts(pressed),
}
op.GeoM.Translate(offsetX, offsetY)
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screen.DrawImage(keyboardImage, op)
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return nil
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}
func main() {
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if err := ebiten.Run(update, screenWidth, screenHeight, 2, &#34;Keyboard (Ebiten Demo)&#34;); err != nil {
log.Fatal(err)
}
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}
</code></pre>
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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>
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