ebiten/docs/examples/keyboard.html
2017-08-18 03:00:05 +09:00

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<h2>Ebiten example - keyboard</h2>
<iframe src="keyboard.content.html" width="640" height="480"></iframe>
<pre class="card"><div class="card-body"><code class="language-go">// &#43;build example
package main
import (
&#34;log&#34;
&#34;strconv&#34;
&#34;github.com/hajimehoshi/ebiten&#34;
&#34;github.com/hajimehoshi/ebiten/ebitenutil&#34;
&#34;github.com/hajimehoshi/ebiten/examples/keyboard/keyboard&#34;
)
const (
screenWidth = 320
screenHeight = 240
)
var keyboardImage *ebiten.Image
func init() {
var err error
keyboardImage, _, err = ebitenutil.NewImageFromFile(&#34;_resources/images/keyboard/keyboard.png&#34;, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
}
var keyNames = map[ebiten.Key]string{
ebiten.KeyBackspace: &#34;BS&#34;,
ebiten.KeyComma: &#34;,&#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;,
ebiten.KeyMinus: &#34;-&#34;,
ebiten.KeyEqual: &#34;=&#34;,
ebiten.KeyBackslash: &#34;\\&#34;,
ebiten.KeyGraveAccent: &#34;`&#34;,
ebiten.KeyLeftBracket: &#34;[&#34;,
ebiten.KeyRightBracket: &#34;]&#34;,
ebiten.KeySemicolon: &#34;;&#34;,
ebiten.KeyApostrophe: &#34;&#39;&#34;,
ebiten.KeySlash: &#34;/&#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;,
}
func update(screen *ebiten.Image) error {
if ebiten.IsRunningSlowly() {
return nil
}
const offsetX, offsetY = 24, 40
op := &amp;ebiten.DrawImageOptions{}
op.GeoM.Translate(offsetX, offsetY)
op.ColorM.Scale(0.5, 0.5, 0.5, 1)
screen.DrawImage(keyboardImage, op)
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;))
}
}
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))
}
}
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))
}
}
for key, name := range keyNames {
if ebiten.IsKeyPressed(key) {
pressed = append(pressed, name)
}
}
op = &amp;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 = &amp;r
screen.DrawImage(keyboardImage, op)
}
return nil
}
func main() {
if err := ebiten.Run(update, screenWidth, screenHeight, 2, &#34;Keyboard (Ebiten Demo)&#34;); err != nil {
log.Fatal(err)
}
}
</code></div></pre>
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