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// Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qqmlaspectengine_p.h"
#include <Qt3DCore/qentity.h>
#include <QtCore/QDebug>
#include <QtQml/QQmlComponent>
#include <QtQml/QQmlContext>
QT_BEGIN_NAMESPACE
namespace Qt3DCore {
namespace Quick {
/*!
\namespace Qt3DCore::Quick
\inmodule Qt3DCore
\ingroup qt3d-namespaces
\brief Contains classes used for implementing QML functionality into Qt3D
applications.
*/
QQmlAspectEnginePrivate::QQmlAspectEnginePrivate()
: QObjectPrivate()
, m_qmlEngine(new QQmlEngine())
, m_aspectEngine(new QAspectEngine())
, m_component(nullptr)
{
}
/*!
* \class Qt3DCore::Quick::QQmlAspectEngine
* \inheaderfile Qt3DQuick/QQmlAspectEngine
* \inmodule Qt3DCore
*
* \brief The QQmlAspectEngine provides an environment for the QAspectEngine and
* a method for instantiating QML components.
*/
/*!
* \enum Qt3DCore::Quick::QQmlAspectEngine::Status
*
* The status of the engine.
*
* \value Null
* \value Ready
* \value Loading
* \value Error
*/
/*!
* \fn void Qt3DCore::Quick::QQmlAspectEngine::statusChanged(Status status)
*
* This signal is emitted with \a status when the status of the engine changes.
*/
/*!
* \fn void Qt3DCore::Quick::QQmlAspectEngine::sceneCreated(QObject* rootObject)
*
* This signal is emitted with \a rootObject when the scene has been instantiated. This provides a
* chance to manipulate the scene before passing it over to the aspect engine. Useful for
* convenience window classes to set up cameras and surfaces on the framegraph and event sources
* for the input aspect etc.
*/
/*!
* Constructs a new QQmlAspectEngine with \a parent.
*/
QQmlAspectEngine::QQmlAspectEngine(QObject *parent)
: QObject(*new QQmlAspectEnginePrivate, parent)
{
}
/*! \internal */
QQmlAspectEngine::~QQmlAspectEngine()
{
}
/*!
* \return the status.
*/
QQmlAspectEngine::Status QQmlAspectEngine::status() const
{
Q_D(const QQmlAspectEngine);
if (!d->m_component)
return Null;
return Status(d->m_component->status());
}
/*!
* Sets \a source as a source for the QML component to be created.
*/
void QQmlAspectEngine::setSource(const QUrl &source)
{
Q_D(QQmlAspectEngine);
if (d->m_component) {
d->m_aspectEngine->setRootEntity(QEntityPtr());
d->m_component = nullptr;
}
if (!source.isEmpty()) {
d->m_component = new QQmlComponent(d->m_qmlEngine.data(), source);
if (!d->m_component->isLoading()) {
d->_q_continueExecute();
} else {
QObject::connect(d->m_component, SIGNAL(statusChanged(QQmlComponent::Status)),
this, SLOT(_q_continueExecute()));
}
}
}
/*!
* \return the engine.
*/
QQmlEngine *QQmlAspectEngine::qmlEngine() const
{
Q_D(const QQmlAspectEngine);
return d->m_qmlEngine.data();
}
/*!
* \return the aspectEngine.
*/
QAspectEngine *QQmlAspectEngine::aspectEngine() const
{
Q_D(const QQmlAspectEngine);
return d->m_aspectEngine.data();
}
void QQmlAspectEnginePrivate::_q_continueExecute()
{
Q_Q(QQmlAspectEngine);
QObject::disconnect(m_component, SIGNAL(statusChanged(QQmlComponent::Status)),
q, SLOT(_q_continueExecute()));
if (m_component->isError()) {
const auto errors = m_component->errors();
for (const QQmlError &error : errors) {
QMessageLogger(error.url().toString().toLatin1().constData(), error.line(), 0).warning()
<< error;
}
emit q->statusChanged(q->status());
return;
}
QObject* obj = m_component->create();
if (m_component->isError()) {
const auto errors = m_component->errors();
for (const QQmlError &error : errors) {
QMessageLogger(error.url().toString().toLatin1().constData(), error.line(), 0).warning()
<< error;
}
emit q->statusChanged(q->status());
return;
}
// Let users know we have loaded the QML file, and the scene has been instantiated.
// This gives a chance to manipulate the scene before passing it over to the
// aspect engine. Useful for convenience window classes to set up cameras and surfaces
// on the framegraph and event sources for the input aspect etc.
emit q->sceneCreated(obj);
m_aspectEngine->setRootEntity(QEntityPtr(qobject_cast<QEntity *>(obj)));
emit q->statusChanged(q->status());
}
} // namespace Quick
} // namespace Qt3DCore
QT_END_NAMESPACE
#include "moc_qqmlaspectengine.cpp"
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