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39
40#ifndef WANDERAFFECTOR_H
41#define WANDERAFFECTOR_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 <QHash>
54#include "qquickparticleaffector_p.h"
55
56QT_BEGIN_NAMESPACE
57
58struct WanderData{
59 qreal x_vel;
60 qreal y_vel;
61 qreal x_peak;
62 qreal x_var;
63 qreal y_peak;
64 qreal y_var;
65};
66
67class QQuickWanderAffector : public QQuickParticleAffector
68{
69 Q_OBJECT
70 Q_PROPERTY(qreal pace READ pace WRITE setPace NOTIFY paceChanged)
71 Q_PROPERTY(qreal xVariance READ xVariance WRITE setXVariance NOTIFY xVarianceChanged)
72 Q_PROPERTY(qreal yVariance READ yVariance WRITE setYVariance NOTIFY yVarianceChanged)
73 Q_PROPERTY(AffectableParameters affectedParameter READ affectedParameter WRITE setAffectedParameter NOTIFY affectedParameterChanged)
74 QML_NAMED_ELEMENT(Wander)
75
76public:
77 enum AffectableParameters {
78 Position,
79 Velocity,
80 Acceleration
81 };
82 Q_ENUM(AffectableParameters)
83
84 explicit QQuickWanderAffector(QQuickItem *parent = 0);
85 ~QQuickWanderAffector();
86// virtual void reset(int systemIdx);
87
88 qreal xVariance() const
89 {
90 return m_xVariance;
91 }
92
93 qreal yVariance() const
94 {
95 return m_yVariance;
96 }
97
98 qreal pace() const
99 {
100 return m_pace;
101 }
102
103 AffectableParameters affectedParameter() const
104 {
105 return m_affectedParameter;
106 }
107
108protected:
109 bool affectParticle(QQuickParticleData *d, qreal dt) override;
110
111Q_SIGNALS:
112
113 void xVarianceChanged(qreal arg);
114
115 void yVarianceChanged(qreal arg);
116
117 void paceChanged(qreal arg);
118
119
120 void affectedParameterChanged(AffectableParameters arg);
121
122public Q_SLOTS:
123void setXVariance(qreal arg)
124{
125 if (m_xVariance != arg) {
126 m_xVariance = arg;
127 Q_EMIT xVarianceChanged(arg);
128 }
129}
130
131void setYVariance(qreal arg)
132{
133 if (m_yVariance != arg) {
134 m_yVariance = arg;
135 Q_EMIT yVarianceChanged(arg);
136 }
137}
138
139void setPace(qreal arg)
140{
141 if (m_pace != arg) {
142 m_pace = arg;
143 Q_EMIT paceChanged(arg);
144 }
145}
146
147
148void setAffectedParameter(AffectableParameters arg)
149{
150 if (m_affectedParameter != arg) {
151 m_affectedParameter = arg;
152 Q_EMIT affectedParameterChanged(arg);
153 }
154}
155
156private:
157 WanderData* getData(int idx);
158 QHash<int, WanderData*> m_wanderData;
159 qreal m_xVariance;
160 qreal m_yVariance;
161 qreal m_pace;
162 AffectableParameters m_affectedParameter;
163};
164
165QT_END_NAMESPACE
166#endif // WANDERAFFECTOR_H
167

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