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42 #include "qquickparticlepainter_p.h"
43 #include <QQuickCanvas>
47 \qmlclass ParticlePainter QQuickParticlePainter
48 \inqmlmodule QtQuick.Particles 2
49 \inherits ParticlePainter
50 \brief ParticlePainter elements allow you to specify how to paint particles.
52 The default implementation paints nothing. See the subclasses if you want to
53 paint something visible.
57 \qmlproperty ParticleSystem QtQuick.Particles2::ParticlePainter::system
58 This is the system whose particles can be painted by the element.
59 If the ParticlePainter is a direct child of a ParticleSystem, it will automatically be associated with it.
62 \qmlproperty list<string> QtQuick.Particles2::ParticlePainter::groups
63 Which logical particle groups will be painted.
65 If empty, it will paint the default particle group ("").
67 QQuickParticlePainter::QQuickParticlePainter(QQuickItem *parent) :
69 m_system(0), m_count(0), m_pleaseReset(true), m_canvas(0)
73 void QQuickParticlePainter::itemChange(ItemChange change, const ItemChangeData &data)
75 if (change == QQuickItem::ItemSceneChange) {
77 disconnect(m_canvas, SIGNAL(sceneGraphInvalidated()), this, SLOT(sceneGraphInvalidated()));
78 m_canvas = data.canvas;
80 connect(m_canvas, SIGNAL(sceneGraphInvalidated()), this, SLOT(sceneGraphInvalidated()), Qt::DirectConnection);
85 void QQuickParticlePainter::componentComplete()
87 if (!m_system && qobject_cast<QQuickParticleSystem*>(parentItem()))
88 setSystem(qobject_cast<QQuickParticleSystem*>(parentItem()));
89 QQuickItem::componentComplete();
93 void QQuickParticlePainter::setSystem(QQuickParticleSystem *arg)
95 if (m_system != arg) {
98 m_system->registerParticlePainter(this);
101 emit systemChanged(arg);
105 void QQuickParticlePainter::load(QQuickParticleData* d)
107 initialize(d->group, d->index);
110 m_pendingCommits << qMakePair<int, int>(d->group, d->index);
113 void QQuickParticlePainter::reload(QQuickParticleData* d)
117 m_pendingCommits << qMakePair<int, int>(d->group, d->index);
120 void QQuickParticlePainter::reset()
122 m_pendingCommits.clear();
123 m_pleaseReset = true;
126 void QQuickParticlePainter::setCount(int c)//### TODO: some resizeing so that particles can reallocate on size change instead of recreate
128 Q_ASSERT(c >= 0); //XXX
136 int QQuickParticlePainter::count()
141 void QQuickParticlePainter::calcSystemOffset(bool resetPending)
143 if (!m_system || !parentItem())
145 QPointF lastOffset = m_systemOffset;
146 m_systemOffset = -1 * this->mapFromItem(m_system, QPointF(0.0, 0.0));
147 if (lastOffset != m_systemOffset && !resetPending){
148 //Reload all particles//TODO: Necessary?
149 foreach (const QString &g, m_groups){
150 int gId = m_system->groupIds[g];
151 foreach (QQuickParticleData* d, m_system->groupData[gId]->data)
156 typedef QPair<int,int> intPair;
157 void QQuickParticlePainter::performPendingCommits()
160 foreach (intPair p, m_pendingCommits)
161 commit(p.first, p.second);
162 m_pendingCommits.clear();