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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Declarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 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 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qsgparticlepainter_p.h"
#include <QDebug>
QT_BEGIN_NAMESPACE
QSGParticlePainter::QSGParticlePainter(QSGItem *parent) :
QSGItem(parent),
m_system(0), m_count(0), m_sentinel(new QSGParticleData(0))
{
connect(this, SIGNAL(parentChanged(QSGItem*)),
this, SLOT(calcSystemOffset()));
connect(this, SIGNAL(xChanged()),
this, SLOT(calcSystemOffset()));
connect(this, SIGNAL(yChanged()),
this, SLOT(calcSystemOffset()));
}
void QSGParticlePainter::componentComplete()
{
if (!m_system && qobject_cast<QSGParticleSystem*>(parentItem()))
setSystem(qobject_cast<QSGParticleSystem*>(parentItem()));
if (!m_system)
qWarning() << "ParticlePainter created without a particle system specified";//TODO: useful QML warnings, like line number?
QSGItem::componentComplete();
}
void QSGParticlePainter::setSystem(QSGParticleSystem *arg)
{
if (m_system != arg) {
m_system = arg;
if (m_system){
m_system->registerParticlePainter(this);
connect(m_system, SIGNAL(xChanged()),
this, SLOT(calcSystemOffset()));
connect(m_system, SIGNAL(yChanged()),
this, SLOT(calcSystemOffset()));
calcSystemOffset();
}
emit systemChanged(arg);
}
}
void QSGParticlePainter::load(QSGParticleData* d)
{
initialize(d->group, d->index);
commit(d->group, d->index);
}
void QSGParticlePainter::reload(QSGParticleData* d)
{
commit(d->group, d->index);
}
void QSGParticlePainter::reset()
{
calcSystemOffset(true);//In case an ancestor changed in some way
}
void QSGParticlePainter::setCount(int c)//### TODO: some resizeing so that particles can reallocate on size change instead of recreate
{
Q_ASSERT(c >= 0); //XXX
if (c == m_count)
return;
m_count = c;
emit countChanged();
reset();
}
int QSGParticlePainter::count()
{
return m_count;
}
void QSGParticlePainter::calcSystemOffset(bool resetPending)
{
if (!m_system || !parentItem())
return;
QPointF lastOffset = m_systemOffset;
m_systemOffset = -1 * this->mapFromItem(m_system, QPointF(0.0, 0.0));
if (lastOffset != m_systemOffset && !resetPending){
//Reload all particles//TODO: Necessary?
foreach (const QString &g, m_particles){
int gId = m_system->m_groupIds[g];
foreach (QSGParticleData* d, m_system->m_groupData[gId]->data)
reload(d);
}
}
}
QT_END_NAMESPACE
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