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39
40#ifndef CUSTOMAFFECTOR_H
41#define CUSTOMAFFECTOR_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
54#include <QObject>
55#include <QtQml/qqml.h>
56#include "qquickparticlesystem_p.h"
57#include "qquickparticleextruder_p.h"
58#include "qquickparticleaffector_p.h"
59#include "qquickdirection_p.h"
60
61QT_BEGIN_NAMESPACE
62
63class QQuickCustomAffector : public QQuickParticleAffector
64{
65 Q_OBJECT
66 Q_PROPERTY(bool relative READ relative WRITE setRelative NOTIFY relativeChanged)
67 Q_PROPERTY(QQuickDirection *position READ position WRITE setPosition NOTIFY positionChanged RESET positionReset)
68 Q_PROPERTY(QQuickDirection *velocity READ velocity WRITE setVelocity NOTIFY velocityChanged RESET velocityReset)
69 Q_PROPERTY(QQuickDirection *acceleration READ acceleration WRITE setAcceleration NOTIFY accelerationChanged RESET accelerationReset)
70 QML_NAMED_ELEMENT(Affector)
71
72public:
73 explicit QQuickCustomAffector(QQuickItem *parent = 0);
74 void affectSystem(qreal dt) override;
75
76 QQuickDirection * position() const
77 {
78 return m_position;
79 }
80
81 QQuickDirection * velocity() const
82 {
83 return m_velocity;
84 }
85
86 QQuickDirection * acceleration() const
87 {
88 return m_acceleration;
89 }
90
91 void positionReset()
92 {
93 m_position = &m_nullVector;
94 }
95
96 void velocityReset()
97 {
98 m_velocity = &m_nullVector;
99 }
100
101 void accelerationReset()
102 {
103 m_acceleration = &m_nullVector;
104 }
105
106 bool relative() const
107 {
108 return m_relative;
109 }
110
111
112Q_SIGNALS:
113 void affectParticles(const QJSValue &particles, qreal dt);
114
115 void positionChanged(QQuickDirection * arg);
116
117 void velocityChanged(QQuickDirection * arg);
118
119 void accelerationChanged(QQuickDirection * arg);
120
121 void relativeChanged(bool arg);
122
123public Q_SLOTS:
124 void setPosition(QQuickDirection * arg)
125 {
126 if (m_position != arg) {
127 m_position = arg;
128 Q_EMIT positionChanged(arg);
129 }
130 }
131
132 void setVelocity(QQuickDirection * arg)
133 {
134 if (m_velocity != arg) {
135 m_velocity = arg;
136 Q_EMIT velocityChanged(arg);
137 }
138 }
139
140 void setAcceleration(QQuickDirection * arg)
141 {
142 if (m_acceleration != arg) {
143 m_acceleration = arg;
144 Q_EMIT accelerationChanged(arg);
145 }
146 }
147
148 void setRelative(bool arg)
149 {
150 if (m_relative != arg) {
151 m_relative = arg;
152 Q_EMIT relativeChanged(arg);
153 }
154 }
155
156protected:
157 bool isAffectConnected();
158 bool affectParticle(QQuickParticleData *d, qreal dt) override;
159
160private:
161 void affectProperties(const QList<QQuickParticleData*> &particles, qreal dt);
162 QQuickDirection * m_position;
163 QQuickDirection * m_velocity;
164 QQuickDirection * m_acceleration;
165
166 QQuickDirection m_nullVector;
167 bool m_relative;
168};
169
170QT_END_NAMESPACE
171#endif // CUSTOMAFFECTOR_H
172

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