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42 #include "qquickparticlepainter_p.h"
46 \qmlclass ParticlePainter QQuickParticlePainter
47 \inqmlmodule QtQuick.Particles 2
48 \inherits ParticlePainter
49 \brief ParticlePainter elements allow you to specify how to paint particles.
51 The default implementation paints nothing. See the subclasses if you want to
52 paint something visible.
56 \qmlproperty ParticleSystem QtQuick.Particles2::ParticlePainter::system
57 This is the system whose particles can be painted by the element.
58 If the ParticlePainter is a direct child of a ParticleSystem, it will automatically be associated with it.
61 \qmlproperty list<string> QtQuick.Particles2::ParticlePainter::groups
62 Which logical particle groups will be painted.
64 If empty, it will paint the default particle group ("").
66 QQuickParticlePainter::QQuickParticlePainter(QQuickItem *parent) :
68 m_system(0), m_count(0), m_pleaseReset(true)
72 void QQuickParticlePainter::componentComplete()
74 if (!m_system && qobject_cast<QQuickParticleSystem*>(parentItem()))
75 setSystem(qobject_cast<QQuickParticleSystem*>(parentItem()));
76 QQuickItem::componentComplete();
80 void QQuickParticlePainter::setSystem(QQuickParticleSystem *arg)
82 if (m_system != arg) {
85 m_system->registerParticlePainter(this);
88 emit systemChanged(arg);
92 void QQuickParticlePainter::load(QQuickParticleData* d)
94 initialize(d->group, d->index);
97 m_pendingCommits << qMakePair<int, int>(d->group, d->index);
100 void QQuickParticlePainter::reload(QQuickParticleData* d)
104 m_pendingCommits << qMakePair<int, int>(d->group, d->index);
107 void QQuickParticlePainter::reset()
109 m_pendingCommits.clear();
110 m_pleaseReset = true;
113 void QQuickParticlePainter::setCount(int c)//### TODO: some resizeing so that particles can reallocate on size change instead of recreate
115 Q_ASSERT(c >= 0); //XXX
123 int QQuickParticlePainter::count()
128 void QQuickParticlePainter::calcSystemOffset(bool resetPending)
130 if (!m_system || !parentItem())
132 QPointF lastOffset = m_systemOffset;
133 m_systemOffset = -1 * this->mapFromItem(m_system, QPointF(0.0, 0.0));
134 if (lastOffset != m_systemOffset && !resetPending){
135 //Reload all particles//TODO: Necessary?
136 foreach (const QString &g, m_groups){
137 int gId = m_system->groupIds[g];
138 foreach (QQuickParticleData* d, m_system->groupData[gId]->data)
143 typedef QPair<int,int> intPair;
144 void QQuickParticlePainter::performPendingCommits()
147 foreach (intPair p, m_pendingCommits)
148 commit(p.first, p.second);
149 m_pendingCommits.clear();