add piece locking sound

src/Taquin.gd

@@ -2,15 +2,26 @@ tool
 class_name Taquin
 extends Control
 
-var Piece = preload("res://src/Piece.tscn")
+enum Direction { UP, DOWN, LEFT, RIGHT }
+enum State {
+	MAIN,
+	WINNING,
+	GAME_OVER,
+}
+
+const _state_transitions = {
+	State.MAIN : [ State.WINNING ],
+	State.WINNING : [ State.GAME_OVER ],
+	State.GAME_OVER : [ State.MAIN ]
+}
+const Piece = preload("res://src/Piece.tscn")
 
 export var rows: int = 4
 export var columns: int = 4
 export var width: int = 512
 export var height: int = 512
 export var difficulty: int = 10
-
+export(State) var current_state = State.MAIN
-enum Direction { UP, DOWN, LEFT, RIGHT }
 
 var interpiece := 4
 var min_padding := 15
@@ -240,11 +251,6 @@ func move_piece(direction) -> void:
 	moving_piece_animation.track_set_key_value(moving_piece_track_index, 1, missing_piece.position)
 	$AnimationPlayer.play("MovingPiece")
 
-	commit_slide()
-	
-	update()
-	check_solved()
-
 func commit_slide():
 	assert(current_sliding_piece != null)
 	assert(current_origin != Vector2.ZERO)
@@ -256,6 +262,8 @@ func commit_slide():
 	swap_pieces(missing_piece, current_sliding_piece)
 	reset_position(missing_piece)
 
+	$AudioStreamPlayer.play()
+
 	ensure_validity()
 	reset_slide()
 	check_solved()
@@ -299,6 +307,18 @@ func ensure_validity() -> void:
 			assert(piece.taquin_index.x == c)
 			assert(piece.taquin_index.y == r)
 
+func current_state_name() -> String:
+	return State.keys()[current_state]
+
+func transition_to(state):
+	if current_state == state:
+		return
+	assert(state in _state_transitions[current_state])
+	var previous_state = current_state
+	current_state = state
+	emit_signal("state_changed", previous_state, current_state)
+
+
 func _on_GameState_state_changed(previous, current):
 	match current:
 		GameState.State.WINNING:
@@ -312,3 +332,9 @@ func _on_Timer_timeout():
 	var game_state = get_node("/root/Main/GameState") as GameState
 	if game_state != null:
 		game_state.transition_to(GameState.State.GAME_OVER)
+
+func _on_AnimationPlayer_animation_finished(anim_name):
+	if anim_name == "MovingPiece":
+		commit_slide()
+		update()
+		check_solved()

src/Taquin.tscn

@@ -1,7 +1,9 @@
-[gd_scene load_steps=7 format=2]
+[gd_scene load_steps=9 format=2]
 
 [ext_resource path="res://src/Taquin.gd" type="Script" id=1]
 [ext_resource path="res://src/Piece.tscn" type="PackedScene" id=2]
+[ext_resource path="res://assets/sounds/lock_01.wav" type="AudioStream" id=3]
+[ext_resource path="res://assets/taqin_theme.tres" type="Theme" id=4]
 
 [sub_resource type="Animation" id=1]
 resource_name = "MovingPiece"
@@ -45,6 +47,7 @@ color_ramp = SubResource( 3 )
 
 [node name="Taquin" type="Control"]
 rect_min_size = Vector2( 540, 540 )
+theme = ExtResource( 4 )
 script = ExtResource( 1 )
 __meta__ = {
 "_edit_use_anchors_": false
@@ -63,7 +66,7 @@ anims/MovingPiece = SubResource( 1 )
 
 [node name="MockPiece" parent="AnimationPlayer" instance=ExtResource( 2 )]
 visible = false
-position = Vector2( 175, 15 )
+position = Vector2( 15, 15 )
 size = 160
 
 [node name="PlaceholderTexture" type="ColorRect" parent="AnimationPlayer/MockPiece"]
@@ -86,4 +89,8 @@ process_material = SubResource( 4 )
 [node name="Timer" type="Timer" parent="."]
 wait_time = 2.0
 one_shot = true
+
+[node name="AudioStreamPlayer" type="AudioStreamPlayer" parent="."]
+stream = ExtResource( 3 )
+[connection signal="animation_finished" from="AnimationPlayer" to="." method="_on_AnimationPlayer_animation_finished"]
 [connection signal="timeout" from="Timer" to="." method="_on_Timer_timeout"]