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39
40#ifndef GRAVITYAFFECTOR_H
41#define GRAVITYAFFECTOR_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53#include "qquickparticleaffector_p.h"
54#include <QtQml/qqml.h>
55
56QT_BEGIN_NAMESPACE
57
58class QQuickGravityAffector : public QQuickParticleAffector
59{
60 Q_OBJECT
61 Q_PROPERTY(qreal magnitude READ magnitude WRITE setMagnitude NOTIFY magnitudeChanged)
62 Q_PROPERTY(qreal acceleration READ magnitude WRITE setAcceleration NOTIFY magnitudeChanged)
63 Q_PROPERTY(qreal angle READ angle WRITE setAngle NOTIFY angleChanged)
64 QML_NAMED_ELEMENT(Gravity)
65public:
66 explicit QQuickGravityAffector(QQuickItem *parent = 0);
67 qreal magnitude() const;
68 qreal angle() const;
69
70protected:
71 bool affectParticle(QQuickParticleData *d, qreal dt) override;
72
73Q_SIGNALS:
74 void magnitudeChanged(qreal arg);
75 void angleChanged(qreal arg);
76
77public Q_SLOTS:
78 void setMagnitude(qreal arg);
79 void setAcceleration(qreal arg);
80 void setAngle(qreal arg);
81
82private:
83 qreal m_magnitude;
84 qreal m_angle;
85
86 bool m_needRecalc;
87 qreal m_dx;
88 qreal m_dy;
89};
90
91QT_END_NAMESPACE
92#endif // GRAVITYAFFECTOR_H
93

source code of qtdeclarative/src/particles/qquickgravity_p.h