qquickparticlegroup.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
 
#include "qquickparticlegroup_p.h"
 
QQuickParticleGroup::QQuickParticleGroup(QObject* parent)
    : QQuickStochasticState(parent)
    , m_system(nullptr)
{
 
}
 
void delayedRedirect(QQmlListProperty<QObject> *prop, QObject *value)
{
    QQuickParticleGroup* pg = qobject_cast<QQuickParticleGroup*>(prop->object);
    if (pg)
        pg->delayRedirect(value);
}
 
QQmlListProperty<QObject> QQuickParticleGroup::particleChildren()
{
    QQuickParticleSystem* system = qobject_cast<QQuickParticleSystem*>(parent());
    if (system) {
        return QQmlListProperty<QObject>(this, nullptr,
                                         &QQuickParticleSystem::statePropertyRedirect, nullptr,
                                         nullptr, nullptr, nullptr, nullptr);
    } else {
        return QQmlListProperty<QObject>(this, nullptr,
                                         &delayedRedirect, nullptr, nullptr,
                                         nullptr, nullptr, nullptr);
    }
}
 
void QQuickParticleGroup::setSystem(QQuickParticleSystem* arg)
{
    if (m_system != arg) {
        m_system = arg;
        m_system->registerParticleGroup(this);
        performDelayedRedirects();
        emit systemChanged(arg);
    }
}
 
void QQuickParticleGroup::delayRedirect(QObject *obj)
{
    m_delayedRedirects << obj;
}
 
void QQuickParticleGroup::performDelayedRedirects()
{
    if (!m_system)
        return;
    foreach (QObject* obj, m_delayedRedirects)
        m_system->stateRedirect(this, m_system, obj);
 
    m_delayedRedirects.clear();
}
 
void QQuickParticleGroup::componentComplete(){
    if (!m_system && qobject_cast<QQuickParticleSystem*>(parent()))
        setSystem(qobject_cast<QQuickParticleSystem*>(parent()));
}
 
#include "moc_qquickparticlegroup_p.cpp"