godot/scene/2d/listener_2d.cpp

/**************************************************************************/
/*  listener_2d.cpp                                                       */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#include "listener_2d.h"

bool Listener2D::_set(const StringName &p_name, const Variant &p_value) {
	if (p_name == "current") {
		if (p_value.operator bool()) {
			make_current();
		} else {
			clear_current();
		}
	} else {
		return false;
	}
	return true;
}

bool Listener2D::_get(const StringName &p_name, Variant &r_ret) const {
	if (p_name == "current") {
		if (is_inside_tree() && get_tree()->is_node_being_edited(this)) {
			r_ret = current;
		} else {
			r_ret = is_current();
		}
	} else {
		return false;
	}
	return true;
}

void Listener2D::_get_property_list(List<PropertyInfo> *p_list) const {
	p_list->push_back(PropertyInfo(Variant::BOOL, PNAME("current")));
}

void Listener2D::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_ENTER_TREE: {
			if (!get_tree()->is_node_being_edited(this) && current) {
				make_current();
			}
		} break;
		case NOTIFICATION_EXIT_TREE: {
			if (!get_tree()->is_node_being_edited(this)) {
				if (is_current()) {
					clear_current();
					current = true; // Keep it true.
				} else {
					current = false;
				}
			}
		} break;
	}
}

void Listener2D::make_current() {
	current = true;
	if (!is_inside_tree()) {
		return;
	}
	get_viewport()->_listener_2d_set(this);
}

void Listener2D::clear_current() {
	current = false;
	if (!is_inside_tree()) {
		return;
	}
	get_viewport()->_listener_2d_remove(this);
}

bool Listener2D::is_current() const {
	if (is_inside_tree() && !get_tree()->is_node_being_edited(this)) {
		return get_viewport()->get_listener_2d() == this;
	} else {
		return current;
	}
	return false;
}

void Listener2D::_bind_methods() {
	ClassDB::bind_method(D_METHOD("make_current"), &Listener2D::make_current);
	ClassDB::bind_method(D_METHOD("clear_current"), &Listener2D::clear_current);
	ClassDB::bind_method(D_METHOD("is_current"), &Listener2D::is_current);
}