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39
40#ifndef ATTRACTORAFFECTOR_H
41#define ATTRACTORAFFECTOR_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
55QT_BEGIN_NAMESPACE
56
57class QQuickAttractorAffector : public QQuickParticleAffector
58{
59 Q_OBJECT
60 Q_PROPERTY(qreal strength READ strength WRITE setStrength NOTIFY strengthChanged)
61 Q_PROPERTY(qreal pointX READ pointX WRITE setPointX NOTIFY pointXChanged)
62 Q_PROPERTY(qreal pointY READ pointY WRITE setPointY NOTIFY pointYChanged)
63 Q_PROPERTY(AffectableParameters affectedParameter READ affectedParameter WRITE setAffectedParameter NOTIFY affectedParameterChanged)
64 Q_PROPERTY(Proportion proportionalToDistance READ proportionalToDistance WRITE setProportionalToDistance NOTIFY proportionalToDistanceChanged)
65 QML_NAMED_ELEMENT(Attractor)
66
67public:
68 enum Proportion{
69 Constant,
70 Linear,
71 Quadratic,
72 InverseLinear,
73 InverseQuadratic
74 };
75 Q_ENUM(Proportion)
76
77 enum AffectableParameters {
78 Position,
79 Velocity,
80 Acceleration
81 };
82 Q_ENUM(AffectableParameters)
83
84 explicit QQuickAttractorAffector(QQuickItem *parent = 0);
85
86 qreal strength() const
87 {
88 return m_strength;
89 }
90
91 qreal pointX() const
92 {
93 return m_x;
94 }
95
96 qreal pointY() const
97 {
98 return m_y;
99 }
100
101 AffectableParameters affectedParameter() const
102 {
103 return m_physics;
104 }
105
106 Proportion proportionalToDistance() const
107 {
108 return m_proportionalToDistance;
109 }
110
111Q_SIGNALS:
112
113 void strengthChanged(qreal arg);
114
115 void pointXChanged(qreal arg);
116
117 void pointYChanged(qreal arg);
118
119 void affectedParameterChanged(AffectableParameters arg);
120
121 void proportionalToDistanceChanged(Proportion arg);
122
123public Q_SLOTS:
124void setStrength(qreal arg)
125{
126 if (m_strength != arg) {
127 m_strength = arg;
128 Q_EMIT strengthChanged(arg);
129 }
130}
131
132void setPointX(qreal arg)
133{
134 if (m_x != arg) {
135 m_x = arg;
136 Q_EMIT pointXChanged(arg);
137 }
138}
139
140void setPointY(qreal arg)
141{
142 if (m_y != arg) {
143 m_y = arg;
144 Q_EMIT pointYChanged(arg);
145 }
146}
147void setAffectedParameter(AffectableParameters arg)
148{
149 if (m_physics != arg) {
150 m_physics = arg;
151 Q_EMIT affectedParameterChanged(arg);
152 }
153}
154
155void setProportionalToDistance(Proportion arg)
156{
157 if (m_proportionalToDistance != arg) {
158 m_proportionalToDistance = arg;
159 Q_EMIT proportionalToDistanceChanged(arg);
160 }
161}
162
163protected:
164 bool affectParticle(QQuickParticleData *d, qreal dt) override;
165
166private:
167qreal m_strength;
168qreal m_x;
169qreal m_y;
170AffectableParameters m_physics;
171Proportion m_proportionalToDistance;
172};
173
174QT_END_NAMESPACE
175#endif // ATTRACTORAFFECTOR_H
176

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