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Diffstat (limited to 'src/declarative/particles/qsgparticlepainter.cpp')
| -rw-r--r-- | src/declarative/particles/qsgparticlepainter.cpp | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/src/declarative/particles/qsgparticlepainter.cpp b/src/declarative/particles/qsgparticlepainter.cpp new file mode 100644 index 0000000000..cf1d3c2894 --- /dev/null +++ b/src/declarative/particles/qsgparticlepainter.cpp @@ -0,0 +1,188 @@ +/**************************************************************************** +** +** 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, 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. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qsgparticlepainter_p.h" +#include <QDebug> +QT_BEGIN_NAMESPACE +QSGParticlePainter::QSGParticlePainter(QSGItem *parent) : + QSGItem(parent), + m_system(0), m_count(0), m_lastStart(0), m_sentinel(new QSGParticleData) +{ + 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) +{ + int idx = particleTypeIndex(d); + m_data[idx] = d; + initialize(idx); + reload(idx); +} + +void QSGParticlePainter::reload(QSGParticleData* d) +{ + reload(particleTypeIndex(d)); +} + +void QSGParticlePainter::reset() +{ + //Have to every time because what it's emitting may have changed and that affects particleTypeIndex + if(m_system && !m_inResize) + resize(0,1);//###Fix this by making resize take sensible arguments + //###This also means double resets. Make reset not virtual? +} + +void QSGParticlePainter::resize(int oldSize, int newSize) +{ + if(newSize == oldSize)//TODO: What if particles switched so indices change but total count is the same? + return; + + QHash<int, QPair<int, int> > oldStarts(m_particleStarts); + //Update particle starts datastore + m_particleStarts.clear(); + m_lastStart = 0; + QList<int> particleList; + if(m_particles.isEmpty()) + particleList << 0; + foreach(const QString &s, m_particles) + particleList << m_system->m_groupIds[s]; + foreach(int gIdx, particleList){ + QSGParticleGroupData *gd = m_system->m_groupData[gIdx]; + m_particleStarts.insert(gIdx, qMakePair<int, int>(gd->size, m_lastStart)); + m_lastStart += gd->size; + } + + //Shuffle stuff around + //TODO: In place shuffling because it's faster + QVector<QSGParticleData*> oldData(m_data); + QVector<QObject*> oldAttached(m_attachedData); + m_data.clear(); + m_data.resize(m_count); + m_attachedData.resize(m_count); + foreach(int gIdx, particleList){ + QSGParticleGroupData *gd = m_system->m_groupData[gIdx]; + for(int i=0; i<gd->data.size(); i++){//TODO: When group didn't exist before + int newIdx = m_particleStarts[gIdx].second + i; + int oldIdx = oldStarts[gIdx].second + i; + if(i >= oldStarts[gIdx].first || oldData.size() <= oldIdx){ + m_data[newIdx] = m_sentinel; + }else{ + m_data[newIdx] = oldData[oldIdx]; + m_attachedData[newIdx] = oldAttached[oldIdx]; + } + } + } + m_inResize = true; + reset(); + m_inResize = false; +} + + +void QSGParticlePainter::setCount(int c) +{ + Q_ASSERT(c >= 0); //XXX + if(c == m_count) + return; + int lastCount = m_count; + m_count = c; + resize(lastCount, m_count); + emit countChanged(); +} + +int QSGParticlePainter::count() +{ + return m_count; +} + +int QSGParticlePainter::particleTypeIndex(QSGParticleData* d) +{ + Q_ASSERT(d && m_particleStarts.contains(d->group));//XXX + int ret = m_particleStarts[d->group].second + d->index; + Q_ASSERT(ret >=0 && ret < m_count);//XXX:shouldn't assert, but bugs here were hard to find in the past + return ret; +} + + +void QSGParticlePainter::calcSystemOffset() +{ + if(!m_system) + return; + QPointF lastOffset = m_systemOffset; + m_systemOffset = -1 * this->mapFromItem(m_system, QPointF()); + if(lastOffset != m_systemOffset){ + //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 |