diff options
Diffstat (limited to 'src/imports/particles/dataparticle.cpp')
| -rw-r--r-- | src/imports/particles/dataparticle.cpp | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/src/imports/particles/dataparticle.cpp b/src/imports/particles/dataparticle.cpp new file mode 100644 index 0000000000..a2965e8c71 --- /dev/null +++ b/src/imports/particles/dataparticle.cpp @@ -0,0 +1,274 @@ +/**************************************************************************** +** +** 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 "dataparticle.h" +#include <QtDeclarative/private/qsgvisualitemmodel_p.h> +#include <qsgnode.h> +#include <QDebug> + +QT_BEGIN_NAMESPACE + +DataParticle::DataParticle(QSGItem *parent) : + ParticleType(parent), m_ownModel(false), m_comp(0), m_model(0), m_fade(true), m_modelCount(0) +{ + setFlag(QSGItem::ItemHasContents); +} + +QVariant DataParticle::model() const +{ + return m_dataSource; +} + +void DataParticle::setModel(const QVariant &arg) +{ + if(arg == m_dataSource) + return; + m_dataSource = arg; + if(qobject_cast<QSGVisualDataModel*>(arg.value<QObject*>())) { + if(m_ownModel && m_model) + delete m_model; + m_model = qobject_cast<QSGVisualDataModel*>(arg.value<QObject*>()); + m_ownModel = false; + }else{ + if(!m_model || !m_ownModel) + m_model = new QSGVisualDataModel(qmlContext(this)); + m_model->setModel(m_dataSource); + m_ownModel = true; + } + if(m_comp) + m_model->setDelegate(m_comp); + emit modelChanged(); + emit modelCountChanged(); + connect(m_model, SIGNAL(countChanged()), + this, SIGNAL(modelCountChanged())); + connect(m_model, SIGNAL(countChanged()), + this, SLOT(updateCount())); + updateCount(); +} + +void DataParticle::updateCount() +{ + int newCount = 0; + if(m_model) + newCount = m_model->count(); + if(newCount < 0) + return;//WTF? + if(m_modelCount == 0 || newCount == 0){ + m_available.clear(); + for(int i=0; i<newCount; i++) + m_available << i; + }else if(newCount < m_modelCount){ + for(int i=newCount; i<m_modelCount; i++) //existing ones must leave normally, but aren't readded + m_available.removeAll(i); + }else if(newCount > m_modelCount){ + for(int i=m_modelCount; i<newCount; i++) + m_available << i; + } + m_modelCount = newCount; +} + +QDeclarativeComponent *DataParticle::delegate() const +{ + if(m_model) + return m_model->delegate(); + return 0; +} + +void DataParticle::setDelegate(QDeclarativeComponent *comp) +{ + if (QSGVisualDataModel *dataModel = qobject_cast<QSGVisualDataModel*>(m_model)) + if (comp == dataModel->delegate()) + return; + m_comp = comp; + if(m_model) + m_model->setDelegate(comp); + emit delegateChanged(); +} + +int DataParticle::modelCount() const +{ + if(m_model) + const_cast<DataParticle*>(this)->updateCount();//TODO: Investigate why this doesn't get called properly + return m_modelCount; +} + + +void DataParticle::freeze(QSGItem* item) +{ + m_stasis << item; +} + + +void DataParticle::unfreeze(QSGItem* item) +{ + m_stasis.remove(item); +} + +void DataParticle::load(ParticleData* d) +{ + if(!m_model || !m_model->count()) + return; + int pos = particleTypeIndex(d); + if(m_available.isEmpty()) + return; + 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.); + m_available << m_idx[pos]; + m_model->release(m_items[pos]); + m_idx[pos] = -1; + m_items[pos] = 0; + m_data[pos] = 0; + m_activeCount--; + } + m_items[pos] = m_model->item(m_available.first()); + m_idx[pos] = m_available.first(); + m_available.pop_front(); + DataParticleAttached* mpa = qobject_cast<DataParticleAttached*>(qmlAttachedPropertiesObject<DataParticle>(m_items[pos])); + if(mpa){ + mpa->m_mp = this; + mpa->attach(); + } + m_items[pos]->setParentItem(this); + m_data[pos] = d; + m_activeCount++; +} + +void DataParticle::reload(ParticleData* d) +{ + //No-op unless we start copying the data. +} + +void DataParticle::setCount(int c) +{ + ParticleType::setCount(c);//###Do we need our own? + m_particleCount = c; + reset(); +} + +int DataParticle::count() +{ + return m_particleCount; +} + +void DataParticle::reset() +{ + ParticleType::reset(); + //TODO: Cleanup items? + m_items.resize(m_particleCount); + m_data.resize(m_particleCount); + m_idx.resize(m_particleCount); + m_items.fill(0); + m_data.fill(0); + m_idx.fill(-1); + //m_available.clear();//Should this be reset too? + //m_pendingItems.clear();//TODO: Should this be done? If so, Emit signal? +} + + +QSGNode* DataParticle::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 DataParticle::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]; + ParticleData* 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.); + m_available << m_idx[i]; + m_model->release(m_items[i]); + m_idx[i] = -1; + 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); + } +} + +DataParticleAttached *DataParticle::qmlAttachedProperties(QObject *object) +{ + return new DataParticleAttached(object); +} + +QT_END_NAMESPACE |