feat(ui): add options menu

game/state/handlers/options.go

@@ -0,0 +1,62 @@
+package handlers
+
+import (
+	"tetris/assets"
+	"tetris/engine/audio"
+	"tetris/engine/core"
+	"tetris/engine/render"
+	"tetris/game/state"
+	"tetris/game/ui"
+	"tetris/game/ui/layouts"
+	"tetris/game/ui/widgets"
+	"tetris/game/uievents"
+
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+type OptionsMenu struct {
+	sndVolume *widgets.Slider
+	list      *layouts.ListBox
+}
+
+func soundVolumeChanged(widget *widgets.Slider) {
+	value := core.ByteToClampedFloat32(byte(widget.Value))
+
+	audio.SetVolume(value)
+	audio.Play(assets.SFX_MENU_SOUND_VOLUME_SELECT)
+}
+
+func NewOptionsMenu() *OptionsMenu {
+	sndVolume := widgets.NewSlider(0, 255, 10).WithOnChange(soundVolumeChanged)
+	return &OptionsMenu{
+		sndVolume: sndVolume,
+		list: layouts.NewListBox([]ui.InputWidget{
+			layouts.NewInputControl(widgets.NewLabel("Sound Volume", 16), sndVolume),
+		}).Spacing(10).OnSelect(uievents.MenuSelect),
+	}
+}
+
+func (menu *OptionsMenu) Enter() {
+	vol := core.ClampedFloat32ToByte(audio.Volume())
+	menu.sndVolume.SetValue(int(vol))
+}
+
+func (OptionsMenu) Exit() {
+}
+
+func (menu *OptionsMenu) Update(fsm state.Transitioner, delta float32) {
+	if rl.IsKeyPressed(rl.KeyEscape) {
+		fsm.Switch("menu")
+	} else {
+		menu.list.HandleInput()
+	}
+}
+
+func (opt OptionsMenu) Render() {
+	render.Begin(rl.Black)
+
+	render.DrawTextCenter(340, 100, 32, "Options", rl.White)
+	opt.list.Draw(150, 200)
+
+	render.End()
+}