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Diffstat (limited to 'src/declarative/particles/qsgparticleemitter.cpp')
| -rw-r--r-- | src/declarative/particles/qsgparticleemitter.cpp | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/declarative/particles/qsgparticleemitter.cpp b/src/declarative/particles/qsgparticleemitter.cpp new file mode 100644 index 0000000000..143338f798 --- /dev/null +++ b/src/declarative/particles/qsgparticleemitter.cpp @@ -0,0 +1,157 @@ +/**************************************************************************** +** +** 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 "qsgparticleemitter_p.h" +QT_BEGIN_NAMESPACE +QSGParticleEmitter::QSGParticleEmitter(QSGItem *parent) : + QSGItem(parent) + , m_particlesPerSecond(10) + , m_particleDuration(1000) + , m_particleDurationVariation(0) + , m_emitting(true) + , m_system(0) + , m_extruder(0) + , m_defaultExtruder(0) + , m_speed(&m_nullVector) + , m_acceleration(&m_nullVector) + , m_particleSize(16) + , m_particleEndSize(-1) + , m_particleSizeVariation(0) + , m_maxParticleCount(-1) + , m_burstLeft(0) + +{ + //TODO: Reset speed/acc back to null vector? Or allow null pointer? + connect(this, SIGNAL(maxParticleCountChanged(int)), + this, SIGNAL(particleCountChanged())); + connect(this, SIGNAL(particlesPerSecondChanged(qreal)), + this, SIGNAL(particleCountChanged())); + connect(this, SIGNAL(particleDurationChanged(int)), + this, SIGNAL(particleCountChanged())); +} + +QSGParticleEmitter::~QSGParticleEmitter() +{ + if(m_defaultExtruder) + delete m_defaultExtruder; +} + +void QSGParticleEmitter::componentComplete() +{ + if(!m_system && qobject_cast<QSGParticleSystem*>(parentItem())) + setSystem(qobject_cast<QSGParticleSystem*>(parentItem())); + if(!m_system) + qWarning() << "Emitter created without a particle system specified";//TODO: useful QML warnings, like line number? + QSGItem::componentComplete(); +} +void QSGParticleEmitter::emitWindow(int timeStamp) +{ + Q_UNUSED(timeStamp); +} + + +void QSGParticleEmitter::setEmitting(bool arg) +{ + if (m_emitting != arg) { + m_emitting = arg; + emit emittingChanged(arg); + } +} + + +QSGParticleExtruder* QSGParticleEmitter::effectiveExtruder() +{ + if(m_extruder) + return m_extruder; + if(!m_defaultExtruder) + m_defaultExtruder = new QSGParticleExtruder; + return m_defaultExtruder; +} + +void QSGParticleEmitter::pulse(qreal seconds) +{ + if(!particleCount()) + qWarning() << "pulse called on an emitter with a particle count of zero"; + if(!m_emitting) + m_burstLeft = seconds*1000.0;//TODO: Change name to match +} + +void QSGParticleEmitter::burst(int num) +{ + if(!particleCount()) + qWarning() << "burst called on an emitter with a particle count of zero"; + m_burstQueue << qMakePair(num, QPointF(x(), y())); +} + +void QSGParticleEmitter::burst(int num, qreal x, qreal y) +{ + if(!particleCount()) + qWarning() << "burst called on an emitter with a particle count of zero"; + m_burstQueue << qMakePair(num, QPointF(x, y)); +} + +void QSGParticleEmitter::setMaxParticleCount(int arg) +{ + if (m_maxParticleCount != arg) { + if(arg < 0 && m_maxParticleCount >= 0){ + connect(this, SIGNAL(particlesPerSecondChanged(qreal)), + this, SIGNAL(particleCountChanged())); + connect(this, SIGNAL(particleDurationChanged(int)), + this, SIGNAL(particleCountChanged())); + }else if(arg >= 0 && m_maxParticleCount < 0){ + disconnect(this, SIGNAL(particlesPerSecondChanged(qreal)), + this, SIGNAL(particleCountChanged())); + disconnect(this, SIGNAL(particleDurationChanged(int)), + this, SIGNAL(particleCountChanged())); + } + m_maxParticleCount = arg; + emit maxParticleCountChanged(arg); + } +} + +int QSGParticleEmitter::particleCount() const +{ + if(m_maxParticleCount >= 0) + return m_maxParticleCount; + return m_particlesPerSecond*((m_particleDuration+m_particleDurationVariation)/1000.0); +} + +QT_END_NAMESPACE |