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| |
| #include "qquickparticlepainter_p.h" |
| #include <QQuickWindow> |
| #include <QDebug> |
| QT_BEGIN_NAMESPACE |
| /*! |
| \qmltype ParticlePainter |
| \instantiates QQuickParticlePainter |
| \inqmlmodule QtQuick.Particles |
| \inherits Item |
| \brief For specifying how to paint particles. |
| \ingroup qtquick-particles |
| |
| The default implementation paints nothing. See the subclasses if you want to |
| paint something visible. |
| |
| */ |
| /*! |
| \qmlproperty ParticleSystem QtQuick.Particles::ParticlePainter::system |
| This is the system whose particles can be painted by the element. |
| If the ParticlePainter is a direct child of a ParticleSystem, it will automatically be associated with it. |
| */ |
| /*! |
| \qmlproperty list<string> QtQuick.Particles::ParticlePainter::groups |
| Which logical particle groups will be painted. |
| |
| If empty, it will paint the default particle group (""). |
| */ |
| QQuickParticlePainter::QQuickParticlePainter(QQuickItem *parent) |
| : QQuickItem(parent) |
| , m_system(nullptr) |
| , m_count(0) |
| , m_pleaseReset(true) |
| , m_window(nullptr) |
| , m_windowChanged(false) |
| , m_groupIdsNeedRecalculation(false) |
| { |
| } |
| |
| void QQuickParticlePainter::itemChange(ItemChange change, const ItemChangeData &data) |
| { |
| if (change == QQuickItem::ItemSceneChange) { |
| if (m_window) |
| disconnect(m_window, SIGNAL(sceneGraphInvalidated()), this, SLOT(sceneGraphInvalidated())); |
| m_window = data.window; |
| m_windowChanged = true; |
| if (m_window) |
| connect(m_window, SIGNAL(sceneGraphInvalidated()), this, SLOT(sceneGraphInvalidated()), Qt::DirectConnection); |
| } |
| QQuickItem::itemChange(change, data); |
| } |
| |
| void QQuickParticlePainter::componentComplete() |
| { |
| if (!m_system && qobject_cast<QQuickParticleSystem*>(parentItem())) |
| setSystem(qobject_cast<QQuickParticleSystem*>(parentItem())); |
| QQuickItem::componentComplete(); |
| } |
| |
| void QQuickParticlePainter::recalculateGroupIds() const |
| { |
| if (!m_system) { |
| m_groupIds.clear(); |
| return; |
| } |
| |
| m_groupIdsNeedRecalculation = false; |
| m_groupIds.clear(); |
| |
| const auto groupList = groups(); |
| for (const QString &str : groupList) { |
| QQuickParticleGroupData::ID groupId = m_system->groupIds.value(str, QQuickParticleGroupData::InvalidID); |
| if (groupId == QQuickParticleGroupData::InvalidID) { |
| // invalid data, not finished setting up, or whatever. Fallback: do not cache. |
| m_groupIdsNeedRecalculation = true; |
| } else { |
| m_groupIds.append(groupId); |
| } |
| } |
| } |
| |
| void QQuickParticlePainter::setSystem(QQuickParticleSystem *arg) |
| { |
| if (m_system != arg) { |
| m_system = arg; |
| m_groupIdsNeedRecalculation = true; |
| if (m_system){ |
| m_system->registerParticlePainter(this); |
| reset(); |
| } |
| emit systemChanged(arg); |
| } |
| } |
| |
| void QQuickParticlePainter::setGroups(const QStringList &arg) |
| { |
| if (m_groups != arg) { |
| m_groups = arg; |
| m_groupIdsNeedRecalculation = true; |
| //Note: The system watches this as it has to recalc things when groups change. It will request a reset if necessary |
| Q_EMIT groupsChanged(arg); |
| } |
| } |
| |
| void QQuickParticlePainter::load(QQuickParticleData* d) |
| { |
| initialize(d->groupId, d->index); |
| if (m_pleaseReset) |
| return; |
| m_pendingCommits << qMakePair<int, int>(d->groupId, d->index); |
| } |
| |
| void QQuickParticlePainter::reload(QQuickParticleData* d) |
| { |
| if (m_pleaseReset) |
| return; |
| m_pendingCommits << qMakePair<int, int>(d->groupId, d->index); |
| } |
| |
| void QQuickParticlePainter::reset() |
| { |
| m_pendingCommits.clear(); |
| m_pleaseReset = true; |
| } |
| |
| void QQuickParticlePainter::setCount(int c)//### TODO: some resizeing so that particles can reallocate on size change instead of recreate |
| { |
| Q_ASSERT(c >= 0); //XXX |
| if (c == m_count) |
| return; |
| m_count = c; |
| emit countChanged(); |
| reset(); |
| } |
| |
| void QQuickParticlePainter::calcSystemOffset(bool resetPending) |
| { |
| if (!m_system || !parentItem()) |
| return; |
| QPointF lastOffset = m_systemOffset; |
| m_systemOffset = -1 * this->mapFromItem(m_system, QPointF(0.0, 0.0)); |
| if (lastOffset != m_systemOffset && !resetPending){ |
| //Reload all particles//TODO: Necessary? |
| foreach (const QString &g, m_groups){ |
| int gId = m_system->groupIds[g]; |
| foreach (QQuickParticleData* d, m_system->groupData[gId]->data) |
| reload(d); |
| } |
| } |
| } |
| typedef QPair<int,int> intPair; |
| void QQuickParticlePainter::performPendingCommits() |
| { |
| calcSystemOffset(); |
| foreach (intPair p, m_pendingCommits) |
| commit(p.first, p.second); |
| m_pendingCommits.clear(); |
| } |
| |
| QT_END_NAMESPACE |
| |
| #include "moc_qquickparticlepainter_p.cpp" |