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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef FOLLOWEMITTER_H
#define FOLLOWEMITTER_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qquickparticleemitter_p.h"
#include "qquickparticleaffector_p.h"
QT_BEGIN_NAMESPACE
class Q_QUICKPARTICLES_EXPORT 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)
QML_NAMED_ELEMENT(TrailEmitter)
QML_ADDED_IN_VERSION(2, 0)
public:
enum EmitSize {
ParticleSize = -2//Anything less than 0 will do
};
Q_ENUM(EmitSize)
explicit QQuickTrailEmitter(QQuickItem *parent = nullptr);
void emitWindow(int timeStamp) override;
void reset() override;
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;
}
Q_SIGNALS:
void emitFollowParticles(
const QList<QQuickV4ParticleData> &particles,
const QQuickV4ParticleData &followed);
void particlesPerParticlePerSecondChanged(int arg);
void emitterXVariationChanged(qreal arg);
void emitterYVariationChanged(qreal arg);
void followChanged(const QString &arg);
void emissionShapeChanged(QQuickParticleExtruder* arg);
public Q_SLOTS:
void setParticlesPerParticlePerSecond(int arg)
{
if (m_particlesPerParticlePerSecond != arg) {
m_particlesPerParticlePerSecond = arg;
Q_EMIT particlesPerParticlePerSecondChanged(arg);
}
}
void setEmitterXVariation(qreal arg)
{
if (m_emitterXVariation != arg) {
m_emitterXVariation = arg;
Q_EMIT emitterXVariationChanged(arg);
}
}
void setEmitterYVariation(qreal arg)
{
if (m_emitterYVariation != arg) {
m_emitterYVariation = arg;
Q_EMIT emitterYVariationChanged(arg);
}
}
void setFollow(const QString &arg)
{
if (m_follow != arg) {
m_follow = arg;
Q_EMIT followChanged(arg);
}
}
void setEmissionShape(QQuickParticleExtruder* arg)
{
if (m_emissionExtruder != arg) {
m_emissionExtruder = arg;
Q_EMIT emissionShapeChanged(arg);
}
}
private Q_SLOTS:
void recalcParticlesPerSecond();
private:
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
#endif // FOLLOWEMITTER_H
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