HoverLightClickArea

scene/entity/ux/hover_light_click_area.gd

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+class_name HoverLightClickArea extends Area2D
+
+signal interacted
+
+@export var freezing := false:
+	set(val):
+		freezing = val
+		if freezing and touching:
+			_on_mouse_exited()
+
+var touching = false
+static var _focus_mutex = Mutex.new()
+static var current_focusing_item = "":
+	set(val):
+		current_focusing_item = val
+		if GlobalConfig.DEBUG:
+			print("HoverLightClickArea current_focusing_item=", current_focusing_item)
+static var pending_enter_callables := [] as Array[Callable]
+
+# to pointlight2d
+var lights: Array[NodePath] = []
+
+
+func _ready() -> void:
+	for c in get_children():
+		if c is PointLight2D:
+			lights.append(self.get_path_to(c))
+	if lights.is_empty():
+		printerr("HoverLightButton has no PointLight2D children. auto freezed name=", name)
+		freezing = true
+	mouse_entered.connect(_on_mouse_entered)
+	mouse_exited.connect(_on_mouse_exited)
+	# 默认先熄灭
+	_toggle_light(false)
+
+
+func is_focused() -> bool:
+	return current_focusing_item == name
+
+
+func _on_mouse_entered() -> bool:
+	touching = true
+	if freezing or not is_visible_in_tree():
+		return false
+	if is_focused():
+		return true
+	_focus_mutex.lock()
+	# 尝试获得 current_focusing_item
+	if current_focusing_item != "":
+		if not pending_enter_callables.has(_on_mouse_entered):
+			pending_enter_callables.append(_on_mouse_entered)
+		_focus_mutex.unlock()
+		return false
+	current_focusing_item = name
+	_focus_mutex.unlock()
+	_toggle_light(true)
+	return true
+
+
+func _on_mouse_exited() -> void:
+	touching = false
+	_focus_mutex.lock()
+	pending_enter_callables.erase(_on_mouse_entered)
+	# frezzing 不影响 mouse exited
+	if is_focused():
+		current_focusing_item = ""
+		for c in pending_enter_callables:
+			if c.call():
+				break
+	_focus_mutex.unlock()
+	_toggle_light(false)
+
+
+func _toggle_light(on: bool) -> void:
+	for l in lights:
+		var light = get_node(l) as PointLight2D
+		if light:
+			light.enabled = on
+
+
+func invalid_blink() -> void:
+	for l in lights:
+		var light = get_node(l) as PointLight2D
+		if light:
+			var tween = create_tween()
+			tween.tween_property(light, "color", Color.RED, 0.2)
+			tween.tween_property(light, "color", Color.WHITE, 0.3)
+
+
+func _unhandled_input(event: InputEvent) -> void:
+	if freezing or Engine.is_editor_hint() or not is_visible_in_tree():
+		return
+	if event is InputEventMouseButton:
+		if event.button_index == MOUSE_BUTTON_LEFT and event.pressed:
+			if is_focused():
+				get_viewport().set_input_as_handled()
+				interacted.emit()
+
+
+func _exit_tree() -> void:
+	if touching:
+		_on_mouse_exited()

scene/entity/ux/hover_light_click_area.gd.uid

@@ -0,0 +1 @@
+uid://ubn3pgywffro

scene/entity/ux/hover_light_click_area.tscn

@@ -0,0 +1,9 @@
+[gd_scene load_steps=2 format=3 uid="uid://bkk1rxx36ghrl"]
+
+[ext_resource type="Script" uid="uid://ubn3pgywffro" path="res://scene/entity/ux/hover_light_click_area.gd" id="1_qoyst"]
+
+[node name="HoverLightClickArea" type="Area2D"]
+collision_layer = 4
+collision_mask = 4
+monitorable = false
+script = ExtResource("1_qoyst")