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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtQuick module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef FOLLOWEMITTER_H
+#define FOLLOWEMITTER_H
+#include "qquickparticleemitter_p.h"
+#include "qquickparticleaffector_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class QQuickTrailEmitter : public QQuickParticleEmitter
+{
+ Q_OBJECT
+ Q_PROPERTY(QString follow READ follow WRITE setFollow NOTIFY followChanged)
+ Q_PROPERTY(int emitRatePerParticle READ particlesPerParticlePerSecond WRITE setParticlesPerParticlePerSecond NOTIFY particlesPerParticlePerSecondChanged)
+
+ Q_PROPERTY(QQuickParticleExtruder* emitShape READ emissonShape WRITE setEmissionShape NOTIFY emissionShapeChanged)
+ Q_PROPERTY(qreal emitHeight READ emitterYVariation WRITE setEmitterYVariation NOTIFY emitterYVariationChanged)
+ Q_PROPERTY(qreal emitWidth READ emitterXVariation WRITE setEmitterXVariation NOTIFY emitterXVariationChanged)
+
+ Q_ENUMS(EmitSize)
+public:
+ enum EmitSize {
+ ParticleSize = -2//Anything less than 0 will do
+ };
+ explicit QQuickTrailEmitter(QQuickItem *parent = 0);
+ virtual void emitWindow(int timeStamp);
+ virtual void reset();
+
+ int particlesPerParticlePerSecond() const
+ {
+ return m_particlesPerParticlePerSecond;
+ }
+
+ qreal emitterXVariation() const
+ {
+ return m_emitterXVariation;
+ }
+
+ qreal emitterYVariation() const
+ {
+ return m_emitterYVariation;
+ }
+
+ QString follow() const
+ {
+ return m_follow;
+ }
+
+ QQuickParticleExtruder* emissonShape() const
+ {
+ return m_emissionExtruder;
+ }
+
+signals:
+ void emitFollowParticles(QQmlV8Handle particles, QQmlV8Handle followed);
+
+ void particlesPerParticlePerSecondChanged(int arg);
+
+ void emitterXVariationChanged(qreal arg);
+
+ void emitterYVariationChanged(qreal arg);
+
+ void followChanged(QString arg);
+
+ void emissionShapeChanged(QQuickParticleExtruder* arg);
+
+public slots:
+
+ void setParticlesPerParticlePerSecond(int arg)
+ {
+ if (m_particlesPerParticlePerSecond != arg) {
+ m_particlesPerParticlePerSecond = arg;
+ emit particlesPerParticlePerSecondChanged(arg);
+ }
+ }
+ void setEmitterXVariation(qreal arg)
+ {
+ if (m_emitterXVariation != arg) {
+ m_emitterXVariation = arg;
+ emit emitterXVariationChanged(arg);
+ }
+ }
+
+ void setEmitterYVariation(qreal arg)
+ {
+ if (m_emitterYVariation != arg) {
+ m_emitterYVariation = arg;
+ emit emitterYVariationChanged(arg);
+ }
+ }
+
+ void setFollow(QString arg)
+ {
+ if (m_follow != arg) {
+ m_follow = arg;
+ emit followChanged(arg);
+ }
+ }
+
+ void setEmissionShape(QQuickParticleExtruder* arg)
+ {
+ if (m_emissionExtruder != arg) {
+ m_emissionExtruder = arg;
+ emit emissionShapeChanged(arg);
+ }
+ }
+
+private slots:
+ void recalcParticlesPerSecond();
+
+private:
+ QSet<QQuickParticleData*> m_pending;
+ QVector<qreal> m_lastEmission;
+ int m_particlesPerParticlePerSecond;
+ qreal m_lastTimeStamp;
+ qreal m_emitterXVariation;
+ qreal m_emitterYVariation;
+ QString m_follow;
+ int m_followCount;
+ QQuickParticleExtruder* m_emissionExtruder;
+ QQuickParticleExtruder* m_defaultEmissionExtruder;
+ bool isEmitFollowConnected();
+};
+
+QT_END_NAMESPACE
+QT_END_HEADER
+#endif // FOLLOWEMITTER_H