diff options
Diffstat (limited to 'src/declarative/particles/qsgitemparticle.cpp')
-rw-r--r-- | src/declarative/particles/qsgitemparticle.cpp | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/src/declarative/particles/qsgitemparticle.cpp b/src/declarative/particles/qsgitemparticle.cpp new file mode 100644 index 0000000000..819c823155 --- /dev/null +++ b/src/declarative/particles/qsgitemparticle.cpp @@ -0,0 +1,205 @@ +/**************************************************************************** +** +** 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 "qsgitemparticle_p.h" +#include <QtDeclarative/private/qsgvisualitemmodel_p.h> +#include <qsgnode.h> +#include <QDebug> + +QT_BEGIN_NAMESPACE + +QSGItemParticle::QSGItemParticle(QSGItem *parent) : + QSGParticlePainter(parent), m_fade(true) +{ + setFlag(QSGItem::ItemHasContents); +} + + +void QSGItemParticle::freeze(QSGItem* item) +{ + m_stasis << item; +} + + +void QSGItemParticle::unfreeze(QSGItem* item) +{ + m_stasis.remove(item); +} + +void QSGItemParticle::take(QSGItem *item, bool prioritize) +{ + if(prioritize) + m_pendingItems.push_front(item); + else + m_pendingItems.push_back(item); +} + +void QSGItemParticle::give(QSGItem *item) +{ + //TODO: This +} + +void QSGItemParticle::load(QSGParticleData* d) +{ + if(m_pendingItems.isEmpty()) + return; + int pos = particleTypeIndex(d); + if(m_items[pos]){ + if(m_stasis.contains(m_items[pos])) + qWarning() << "Current model particles prefers overwrite:false"; + //remove old item from the particle that is dying to make room for this one + m_items[pos]->setOpacity(0.); + QSGItemParticleAttached* mpa; + if((mpa = qobject_cast<QSGItemParticleAttached*>(qmlAttachedPropertiesObject<QSGItemParticle>(m_items[pos], false)))) + mpa->detach();//reparent as well? + m_items[pos] = 0; + m_data[pos] = 0; + m_activeCount--; + } + m_items[pos] = m_pendingItems.front(); + m_pendingItems.pop_front(); + m_items[pos]->setX(d->curX() - m_items[pos]->width()/2); + m_items[pos]->setY(d->curY() - m_items[pos]->height()/2); + QSGItemParticleAttached* mpa = qobject_cast<QSGItemParticleAttached*>(qmlAttachedPropertiesObject<QSGItemParticle>(m_items[pos])); + if(mpa){ + mpa->m_mp = this; + mpa->attach(); + } + m_items[pos]->setParentItem(this); + m_data[pos] = d; + m_activeCount++; +} + +void QSGItemParticle::reload(QSGParticleData* d) +{ + //No-op unless we start copying the data. +} + +void QSGItemParticle::setCount(int c) +{ + QSGParticlePainter::setCount(c);//###Do we need our own? + m_particleCount = c; + reset(); +} + +int QSGItemParticle::count() +{ + return m_particleCount; +} + +void QSGItemParticle::reset() +{ + QSGParticlePainter::reset(); + //TODO: Cleanup items? + m_items.resize(m_particleCount); + m_data.resize(m_particleCount); + m_items.fill(0); + m_data.fill(0); + //m_pendingItems.clear();//TODO: Should this be done? If so, Emit signal? +} + + +QSGNode* QSGItemParticle::updatePaintNode(QSGNode* n, UpdatePaintNodeData* d) +{ + //Dummy update just to get painting tick + if(m_pleaseReset){ + m_pleaseReset = false; + reset(); + } + prepareNextFrame(); + + update();//Get called again + if(n) + n->markDirty(QSGNode::DirtyMaterial); + return QSGItem::updatePaintNode(n,d); +} + +void QSGItemParticle::prepareNextFrame() +{ + qint64 timeStamp = m_system->systemSync(this); + qreal curT = timeStamp/1000.0; + qreal dt = curT - m_lastT; + m_lastT = curT; + if(!m_activeCount) + return; + + //TODO: Size, better fade? + for(int i=0; i<m_particleCount; i++){ + QSGItem* item = m_items[i]; + QSGParticleData* data = m_data[i]; + if(!item || !data) + continue; + qreal t = ((timeStamp/1000.0) - data->pv.t) / data->pv.lifeSpan; + if(m_stasis.contains(item)) { + m_data[i]->pv.t += dt;//Stasis effect + continue; + } + if(t >= 1.0){//Usually happens from load + item->setOpacity(0.); + QSGItemParticleAttached* mpa; + if((mpa = qobject_cast<QSGItemParticleAttached*>(qmlAttachedPropertiesObject<QSGItemParticle>(m_items[i])))) + mpa->detach();//reparent as well? + m_items[i] = 0; + m_data[i] = 0; + m_activeCount--; + }else{//Fade + if(m_fade){ + qreal o = 1.; + if(t<0.2) + o = t*5; + if(t>0.8) + o = (1-t)*5; + item->setOpacity(o); + }else{ + item->setOpacity(1.);//###Without fade, it's just a binary toggle - if we turn it off we have to turn it back on + } + } + item->setX(data->curX() - item->width()/2); + item->setY(data->curY() - item->height()/2); + } +} + +QSGItemParticleAttached *QSGItemParticle::qmlAttachedProperties(QObject *object) +{ + return new QSGItemParticleAttached(object); +} + +QT_END_NAMESPACE |