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| |
| #include "qquickparticlegroup_p.h" |
| |
| /*! |
| \qmltype ParticleGroup |
| \instantiates QQuickParticleGroup |
| \inqmlmodule QtQuick.Particles |
| \brief For setting attributes on a logical particle group. |
| \ingroup qtquick-particles |
| |
| This element allows you to set timed transitions on particle groups. |
| |
| You can also use this element to group particle system elements related to the logical |
| particle group. Emitters, Affectors and Painters set as direct children of a ParticleGroup |
| will automatically apply to that logical particle group. TrailEmitters will automatically follow |
| the group. |
| |
| If a ParticleGroup element is not defined for a group, the group will function normally as if |
| none of the transition properties were set. |
| */ |
| /*! |
| \qmlproperty ParticleSystem QtQuick.Particles::ParticleGroup::system |
| This is the system which will contain the group. |
| |
| If the ParticleGroup is a direct child of a ParticleSystem, it will automatically be associated with it. |
| */ |
| /*! |
| \qmlproperty string QtQuick.Particles::ParticleGroup::name |
| This is the name of the particle group, and how it is generally referred to by other elements. |
| |
| If elements refer to a name which does not have an explicit ParticleGroup created, it will |
| work normally (with no transitions specified for the group). If you do not need to assign |
| duration based transitions to a group, you do not need to create a ParticleGroup with that name (although you may). |
| */ |
| /*! |
| \qmlproperty int QtQuick.Particles::ParticleGroup::duration |
| The time in milliseconds before the group will attempt to transition. |
| |
| */ |
| /*! |
| \qmlproperty ParticleSystem QtQuick.Particles::ParticleGroup::durationVariation |
| The maximum number of milliseconds that the duration of the transition cycle varies per particle in the group. |
| |
| Default value is zero. |
| */ |
| /*! |
| \qmlproperty ParticleSystem QtQuick.Particles::ParticleGroup::to |
| The weighted list of transitions valid for this group. |
| |
| If the chosen transition stays in this group, another duration (+/- up to durationVariation) |
| milliseconds will occur before another transition is attempted. |
| */ |
| |
| QQuickParticleGroup::QQuickParticleGroup(QObject* parent) |
| : QQuickStochasticState(parent) |
| , m_system(nullptr) |
| { |
| |
| } |
| |
| void delayedRedirect(QQmlListProperty<QObject> *prop, QObject *value) |
| { |
| QQuickParticleGroup* pg = qobject_cast<QQuickParticleGroup*>(prop->object); |
| if (pg) |
| pg->delayRedirect(value); |
| } |
| |
| QQmlListProperty<QObject> QQuickParticleGroup::particleChildren() |
| { |
| QQuickParticleSystem* system = qobject_cast<QQuickParticleSystem*>(parent()); |
| if (system) |
| return QQmlListProperty<QObject>(this, nullptr, &QQuickParticleSystem::statePropertyRedirect, nullptr, nullptr, nullptr); |
| else |
| return QQmlListProperty<QObject>(this, nullptr, &delayedRedirect, nullptr, nullptr, nullptr); |
| } |
| |
| void QQuickParticleGroup::setSystem(QQuickParticleSystem* arg) |
| { |
| if (m_system != arg) { |
| m_system = arg; |
| m_system->registerParticleGroup(this); |
| performDelayedRedirects(); |
| emit systemChanged(arg); |
| } |
| } |
| |
| void QQuickParticleGroup::delayRedirect(QObject *obj) |
| { |
| m_delayedRedirects << obj; |
| } |
| |
| void QQuickParticleGroup::performDelayedRedirects() |
| { |
| if (!m_system) |
| return; |
| foreach (QObject* obj, m_delayedRedirects) |
| m_system->stateRedirect(this, m_system, obj); |
| |
| m_delayedRedirects.clear(); |
| } |
| |
| void QQuickParticleGroup::componentComplete(){ |
| if (!m_system && qobject_cast<QQuickParticleSystem*>(parent())) |
| setSystem(qobject_cast<QQuickParticleSystem*>(parent())); |
| } |
| |
| #include "moc_qquickparticlegroup_p.cpp" |