added implementation in GO lang

internal/modes/animal.go

@@ -0,0 +1,85 @@
+package modes
+
+import (
+	"image/color"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/hajimehoshi/ebiten/v2"
+
+	"kidskeyboard/internal/ui"
+)
+
+type animal struct {
+	name  string
+	image string
+	sound string
+}
+
+type AnimalMode struct {
+	ctx     Context
+	animals []animal
+	current *animal
+}
+
+func NewAnimalMode(ctx Context) *AnimalMode {
+	return &AnimalMode{
+		ctx: ctx,
+		animals: []animal{
+			{"dog", "assets/animals/dog.png", "assets/animals/dog.wav"},
+			{"cat", "assets/animals/cat.png", "assets/animals/cat.wav"},
+			{"cow", "assets/animals/cow.png", "assets/animals/cow.wav"},
+		},
+	}
+}
+
+func (m *AnimalMode) Name() string { return "CTRL+F3 Animal" }
+func (m *AnimalMode) OnEnter()     {}
+func (m *AnimalMode) OnLeave()     { m.ctx.Audio.StopCurrent() }
+
+func (m *AnimalMode) HandleInput() {
+	for _, key := range justPressedKeys() {
+		if !childKey(key) {
+			continue
+		}
+		a := m.animals[m.ctx.RNG.Intn(len(m.animals))]
+		m.current = &a
+		if !m.ctx.Audio.PlayWAV(filepath.Clean(a.sound), true) {
+			m.ctx.Audio.PlayToneInterrupt(330+float64(m.ctx.RNG.Intn(280)), 260*time.Millisecond, 0.26)
+		}
+		return
+	}
+}
+
+func (m *AnimalMode) Update() {}
+
+func (m *AnimalMode) Draw(screen *ebiten.Image) {
+	screen.Fill(color.Black)
+	w, h := screen.Bounds().Dx(), screen.Bounds().Dy()
+	ui.Text(screen, "CTRL+F3", 20, 20, color.White, 2)
+	if m.current == nil {
+		ui.CenteredText(screen, "ANIMAL", w/2, h/2, color.White, 7)
+		return
+	}
+	if img, ok := m.ctx.Assets.Image(m.current.image); ok {
+		drawImageCentered(screen, img, w/2, h/2, float64(w)*0.65, float64(h)*0.72)
+		return
+	}
+	ui.CenteredText(screen, strings.ToUpper(m.current.name), w/2, h/2, color.White, 9)
+}
+
+func drawImageCentered(screen *ebiten.Image, img *ebiten.Image, cx, cy int, maxW, maxH float64) {
+	iw, ih := img.Bounds().Dx(), img.Bounds().Dy()
+	if iw <= 0 || ih <= 0 {
+		return
+	}
+	scale := min(maxW/float64(iw), maxH/float64(ih))
+	if scale <= 0 {
+		scale = 1
+	}
+	op := &ebiten.DrawImageOptions{}
+	op.GeoM.Scale(scale, scale)
+	op.GeoM.Translate(float64(cx)-float64(iw)*scale/2, float64(cy)-float64(ih)*scale/2)
+	screen.DrawImage(img, op)
+}