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/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qcomponent.h"
#include "qcomponent_p.h"
#include "qentity.h"
#include "qentity_p.h"
#include "qscene_p.h"
#include <Qt3DCore/qscenepropertychange.h>
QT_BEGIN_NAMESPACE
namespace Qt3DCore {
/*!
\class Qt3DCore::QComponentPrivate
\internal
*/
QComponentPrivate::QComponentPrivate()
: QNodePrivate()
, m_shareable(true)
{
}
void QComponentPrivate::addEntity(QEntity *entity)
{
m_entities.append(entity);
if (m_scene != Q_NULLPTR && !m_scene->hasEntityForComponent(m_id, entity->id())) {
if (!m_shareable && !m_scene->entitiesForComponent(m_id).isEmpty())
qWarning() << "Trying to assign a non shareable component to more than one Entity";
m_scene->addEntityForComponent(m_id, entity->id());
}
// We notify only if we have a QChangeArbiter
if (m_changeArbiter != Q_NULLPTR) {
Q_Q(QComponent);
QScenePropertyChangePtr e(new QScenePropertyChange(ComponentAdded, QSceneChange::Node, q->id()));
e->setPropertyName("entity");
e->setValue(QVariant::fromValue(entity->id()));
notifyObservers(e);
}
}
void QComponentPrivate::removeEntity(QEntity *entity)
{
// We notify only if we have a QChangeArbiter
if (m_changeArbiter != Q_NULLPTR) {
Q_Q(QComponent);
QScenePropertyChangePtr e(new QScenePropertyChange(ComponentRemoved, QSceneChange::Node, q->id()));
e->setPropertyName("entity");
e->setValue(QVariant::fromValue(entity->id()));
notifyObservers(e);
}
if (m_scene != Q_NULLPTR)
m_scene->removeEntityForComponent(m_id, entity->id());
m_entities.removeAll(entity);
}
/*!
\class Qt3DCore::QComponent
\inmodule Qt3DCore
\inherits Qt3DCore::QNode
\since 5.5
\brief The base class of scene nodes that can be aggregated by Qt3DCore::QEntity
instances as a component.
A Qt3DCore::QComponent provides a vertical slice of behavior that can be assigned to and
sometimes shared across Qt3DCore::QEntity instances.
Qt3DCore::QComponent subclasses are often aggregated in groups that impart useful
behavior to the aggregating entity. For example, to have an Entity that gets
drawn by the Qt3D renderer aspect, an entity would most likely aggregate
Qt3DCore::QTransform, Qt3DRender::QMesh, and Qt3DRender::QMaterial components.
\sa Qt3DCore::QEntity
*/
/*!
Constructs a new QComponent instance with \a parent as the parent.
\note a QComponent should never be instanced directly,
instance one of the subclasses instead.
*/
QComponent::QComponent(QNode *parent)
: QNode(*new QComponentPrivate, parent)
{
}
QComponent::~QComponent()
{
Q_ASSERT_X(QNodePrivate::get(this)->m_wasCleanedUp, Q_FUNC_INFO, "QNode::cleanup should have been called by now. A Qt3DCore::QComponent subclass didn't call QNode::cleanup in its destructor");
Q_FOREACH (QEntity *entity, entities()) {
QEntityPrivate *entityPimpl = static_cast<QEntityPrivate *>(QEntityPrivate::get(entity));
if (entityPimpl)
entityPimpl->m_components.removeAll(this);
}
}
/*!
Returns whether the QComponent is shareable across entities or not.
*/
bool QComponent::shareable() const
{
Q_D(const QComponent);
return d->m_shareable;
}
/*!
The QComponent can be shared across several entities if \a shareable is true.
*/
void QComponent::setShareable(bool shareable)
{
Q_D(QComponent);
if (d->m_shareable != shareable) {
d->m_shareable = shareable;
emit shareableChanged();
}
}
void QComponent::copy(const QNode *ref)
{
QNode::copy(ref);
const QComponent *comp = static_cast<const QComponent *>(ref);
setShareable(comp->shareable());
}
/*!
Returns a QVector containing all the entities that reference this component.
*/
QVector<QEntity *> QComponent::entities() const
{
Q_D(const QComponent);
return d->m_entities;
}
/*! \internal */
QComponent::QComponent(QComponentPrivate &dd, QNode *parent)
: QNode(dd, parent)
{
}
} // namespace Qt3DCore
/*!
\qmltype Component3D
\instantiates Qt3DCore::QComponent
\inqmlmodule Qt3D
\inherits Node
\since 5.5
*/
/*!
\qmlproperty bool Qt3DCore::Component3D::shareable
*/
QT_END_NAMESPACE
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