////  Created by Bradley Austin Davis on 2016/01/27//  Copyright 2013-2016 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include "QmlOverlay.h" #include <QQuickItem>#include <QThread> #include <DependencyManager.h>#include <OffscreenUi.h> QmlOverlay::QmlOverlay(const QUrl& url) {    buildQmlElement(url);} QmlOverlay::QmlOverlay(const QUrl& url, const QmlOverlay* overlay)    : Overlay2D(overlay) {    buildQmlElement(url);} void QmlOverlay::buildQmlElement(const QUrl& url) {    auto offscreenUI = DependencyManager::get<OffscreenUi>();    if (!offscreenUI) {        return;    }     if (QThread::currentThread() != thread()) {        QMetaObject::invokeMethod(this, "buildQmlElement", Q_ARG(QUrl, url));        return;    }     offscreenUI->load(url, [=, this](QQmlContext* context, QObject* object) {        _qmlElement = dynamic_cast<QQuickItem*>(object);        connect(_qmlElement, &QObject::destroyed, this, &QmlOverlay::qmlElementDestroyed);    });} void QmlOverlay::qmlElementDestroyed() {    _qmlElement = nullptr;} QmlOverlay::~QmlOverlay() {    if (_qmlElement) {        _qmlElement->deleteLater();    }    _qmlElement = nullptr;} // QmlOverlay replaces Overlay's properties with those defined in the QML file used but keeps Overlay2D's properties.void QmlOverlay::setProperties(const QVariantMap& properties) {    Overlay2D::setProperties(properties);     // check to see if qmlElement still exists    if (_qmlElement) {        _qmlElement->setX(_bounds.left());        _qmlElement->setY(_bounds.top());        _qmlElement->setWidth(_bounds.width());        _qmlElement->setHeight(_bounds.height());        _qmlElement->setVisible(_visible);        QMetaObject::invokeMethod(_qmlElement, "updatePropertiesFromScript", Qt::DirectConnection, Q_ARG(QVariant, properties));    }}