Refactor rhythm action architecture

scenes/ui/combo_window_hud.gd

@@ -0,0 +1,105 @@
+class_name ComboWindowHud
+extends HBoxContainer
+
+@export var slot_count := 4
+
+var panels: Array[PanelContainer] = []
+var labels: Array[Label] = []
+var clear_tween: Tween
+
+
+func _ready() -> void:
+	_build_slots()
+	var bus := _event_bus()
+	bus.connect("combo_updated", refresh)
+	bus.connect("combo_cleared", _on_combo_cleared)
+
+
+func refresh(inputs: Array) -> void:
+	if labels.is_empty():
+		_build_slots()
+	for index: int in range(labels.size()):
+		var filled := index < inputs.size()
+		labels[index].text = str(inputs[index]) if filled else "."
+		labels[index].modulate = Color(1.0, 1.0, 1.0, 1.0 if filled else 0.35)
+		panels[index].modulate = Color(1.0, 1.0, 1.0, 1.0 if filled else 0.48)
+		if filled:
+			_pulse_slot(panels[index])
+
+
+func _on_combo_cleared(_reason: StringName) -> void:
+	refresh([])
+	_flash_clear()
+
+
+func _build_slots() -> void:
+	if not labels.is_empty():
+		return
+	for index: int in range(slot_count):
+		var panel := PanelContainer.new()
+		panel.custom_minimum_size = Vector2(64, 56)
+		panel.pivot_offset = Vector2(32, 28)
+		panel.modulate = Color(1.0, 1.0, 1.0, 0.48)
+		panel.add_theme_stylebox_override("panel", _make_slot_style())
+		var label := Label.new()
+		label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+		label.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
+		label.text = "."
+		label.size_flags_horizontal = Control.SIZE_EXPAND_FILL
+		label.size_flags_vertical = Control.SIZE_EXPAND_FILL
+		label.add_theme_color_override("font_color", Color(0.94, 0.98, 1.0, 1.0))
+		label.add_theme_color_override("font_shadow_color", Color(0.0, 0.0, 0.0, 0.9))
+		label.add_theme_constant_override("shadow_offset_x", 2)
+		label.add_theme_constant_override("shadow_offset_y", 2)
+		label.add_theme_font_size_override("font_size", 26)
+		panel.add_child(label)
+		add_child(panel)
+		panels.append(panel)
+		labels.append(label)
+
+
+func _pulse_slot(panel: PanelContainer) -> void:
+	var tween := create_tween()
+	panel.scale = Vector2(1.08, 1.08)
+	tween.tween_property(panel, "scale", Vector2.ONE, 0.09)
+
+
+func _flash_clear() -> void:
+	if clear_tween != null and clear_tween.is_valid():
+		clear_tween.kill()
+	clear_tween = create_tween()
+	clear_tween.set_parallel(true)
+	for panel: PanelContainer in panels:
+		panel.scale = Vector2(1.16, 1.16)
+		panel.modulate = Color(1.0, 1.0, 1.0, 1.0)
+		clear_tween.tween_property(panel, "scale", Vector2.ONE, 0.20)
+		clear_tween.tween_property(panel, "modulate", Color(1.0, 1.0, 1.0, 0.48), 0.20)
+
+
+func _make_slot_style() -> StyleBoxFlat:
+	var style := StyleBoxFlat.new()
+	style.content_margin_left = 6.0
+	style.content_margin_top = 4.0
+	style.content_margin_right = 6.0
+	style.content_margin_bottom = 4.0
+	style.bg_color = Color(0.04, 0.07, 0.09, 0.82)
+	style.border_width_left = 2
+	style.border_width_top = 2
+	style.border_width_right = 2
+	style.border_width_bottom = 2
+	style.border_color = Color(0.43, 0.78, 0.88, 0.95)
+	style.corner_radius_top_left = 6
+	style.corner_radius_top_right = 6
+	style.corner_radius_bottom_right = 6
+	style.corner_radius_bottom_left = 6
+	return style
+
+
+func _event_bus() -> Node:
+	var root := get_tree().root
+	var bus := root.get_node_or_null("EventBus")
+	if bus == null:
+		bus = load("res://autoload/event_bus.gd").new()
+		bus.name = "EventBus"
+		root.add_child(bus)
+	return bus