Add event flags

scripts/UI/EventFlagMenu.gd

@@ -0,0 +1,83 @@
+class_name EventFlagMenu extends Panel
+
+@export var flagList:ItemList
+@export var grid:GridContainer
+var checkboxes:Array[CheckBox] = []
+var selectedEvent:int = -1
+
+func _ready() -> void:
+	while grid.get_child_count() > 0:
+		var child = grid.get_child(0)
+		grid.remove_child(child)
+		child.queue_free()
+
+	for i in range(0, EventSystem.EVENT_FLAG_COUNT):
+		var checkbox:CheckBox = CheckBox.new()
+		checkbox.text = "Flag %s" % str(i)
+		grid.add_child(checkbox)
+		checkboxes.append(checkbox)
+		checkbox.pressed.connect(_on_CheckboxPressed)
+
+	hide()
+	_updateEventList()
+	_updateSelectedEvent()
+
+	EVENT.eventFlagUpdated.connect(_on_EventFlagUpdated)
+	flagList.item_selected.connect(_on_EventSelected)
+
+func _exit_tree() -> void:
+	EVENT.eventFlagUpdated.disconnect(_on_EventFlagUpdated)
+	flagList.item_selected.disconnect(_on_EventSelected)
+
+	for checkbox in checkboxes:
+		grid.remove_child(checkbox)
+		checkbox.queue_free()
+	checkboxes.clear()
+
+func _updateEventList() -> void:
+	flagList.clear()
+	flagList.deselect_all()
+	
+	for event in EventSystem.SpecialEvent:
+		flagList.add_item(event)
+
+func _updateSelectedEvent() -> void:
+	if selectedEvent == -1:
+		for i in range(0, EventSystem.EVENT_FLAG_COUNT):
+			checkboxes[i].visible = false
+		return
+
+	for i in range(0, EventSystem.EVENT_FLAG_COUNT):
+		var cb = checkboxes[i]
+		cb.visible = true
+		cb.button_pressed = EVENT.eventIsAnyOfFlagsOn(selectedEvent, 1 << i)
+
+func open() -> void:
+	show()
+
+func close() -> void:
+	selectedEvent = -1
+	_updateSelectedEvent()
+	hide()
+
+func isOpen() -> bool:
+	return self.visible
+
+func _on_EventFlagUpdated(event:EventSystem.SpecialEvent, flags:int) -> void:
+	_updateEventList()
+	_updateSelectedEvent()
+
+func _on_EventSelected(index:int) -> void:
+	selectedEvent = index
+	_updateSelectedEvent()
+
+func _on_CheckboxPressed() -> void:
+	if selectedEvent == -1:
+		return
+	
+	var value = 0
+	for i in range(0, EventSystem.EVENT_FLAG_COUNT):
+		if checkboxes[i].button_pressed:
+			value |= (1 << i)
+
+	EVENT.eventFlagSetTo(selectedEvent, value)