feat(menu): play "menu enter" sound when button action is triggered

this function will set the selected widget without triggering a onSelect event.

game/state/handlers/menu.go

@@ -2,6 +2,7 @@ package handlers
 
 import (
 	"tetris/assets"
+	"tetris/engine/audio"
 	"tetris/engine/render"
 	"tetris/game"
 	"tetris/game/state"
@@ -17,19 +18,26 @@ type MainMenu struct {
 	list *layouts.ListBox
 }
 
+func enterState(fsm state.Transitioner, state string) func() {
+	return func() {
+		audio.Play(assets.SFX_MENU_ENTER)
+		fsm.Switch(state)
+	}
+}
+
 func NewMainMenu(fsm state.Transitioner) *MainMenu {
 	return &MainMenu{
 		list: layouts.NewListBox([]ui.InputWidget{
-			widgets.NewButton("Start", 32, func() { fsm.Switch("gameplay") }),
-			widgets.NewButton("Options", 32, func() { fsm.Switch("options") }),
-			widgets.NewButton("Quit", 32, func() { fsm.Switch("quit") }),
+			widgets.NewButton("Start", 32, enterState(fsm, "gameplay")),
+			widgets.NewButton("Options", 32, enterState(fsm, "options")),
+			widgets.NewButton("Quit", 32, enterState(fsm, "quit")),
 		}).Spacing(10).
 			OnSelect(uievents.MenuSelect),
 	}
 }
 
 func (main *MainMenu) Enter() {
-	main.list.Select(0)
+	main.list.SetSelected(0)
 }
 
 func (MainMenu) Exit() {

game/ui/layouts/list_box.go

@@ -42,12 +42,19 @@ func (lb ListBox) Entries() []ui.InputWidget {
 }
 
 func (lb *ListBox) Select(index int) {
+	if lb.SetSelected(index) {
+		lb.onSelect()
+	}
+}
+
+func (lb *ListBox) SetSelected(index int) bool {
 	if index >= 0 && index < len(lb.entries) {
 		lb.entries[lb.selected].SetFocus(false)
 		lb.selected = index
 		lb.entries[lb.selected].SetFocus(true)
-		lb.onSelect()
+		return true
 	}
+	return false
 }
 
 func (lb ListBox) Selected() ui.InputWidget {