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39
40 #ifndef QVARIANTANIMATION_P_H
41 #define QVARIANTANIMATION_P_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 "qvariantanimation.h"
55 #include <QtCore/qeasingcurve.h>
56 #include <QtCore/qmetaobject.h>
57 #include <QtCore/qvector.h>
58
59 #include "private/qabstractanimation_p.h"
60
61 #include <type_traits>
62
63 QT_REQUIRE_CONFIG(animation);
64
65 QT_BEGIN_NAMESPACE
66
67 class QVariantAnimationPrivate : public QAbstractAnimationPrivate
68 {
69 Q_DECLARE_PUBLIC(QVariantAnimation)
70 public:
71
72 QVariantAnimationPrivate();
73
get(QVariantAnimation * q)74 static QVariantAnimationPrivate *get(QVariantAnimation *q)
75 {
76 return q->d_func();
77 }
78
79 void setDefaultStartEndValue(const QVariant &value);
80
81
82 QVariant currentValue;
83 QVariant defaultStartEndValue;
84
85 //this is used to keep track of the KeyValue interval in which we currently are
86 struct
87 {
88 QVariantAnimation::KeyValue start, end;
89 } currentInterval;
90
91 QEasingCurve easing;
92 int duration;
93 QVariantAnimation::KeyValues keyValues;
94 QVariantAnimation::Interpolator interpolator;
95
96 void setCurrentValueForProgress(const qreal progress);
97 void recalculateCurrentInterval(bool force=false);
98 void setValueAt(qreal, const QVariant &);
99 QVariant valueAt(qreal step) const;
100 void convertValues(int t);
101
102 void updateInterpolator();
103
104 //XXX this is needed by dui
105 static Q_CORE_EXPORT QVariantAnimation::Interpolator getInterpolator(int interpolationType);
106 };
107
108 //this should make the interpolation faster
109 template<typename T>
110 typename std::enable_if<std::is_unsigned<T>::value, T>::type
_q_interpolate(const T & f,const T & t,qreal progress)111 _q_interpolate(const T &f, const T &t, qreal progress)
112 {
113 return T(f + t * progress - f * progress);
114 }
115
116 // the below will apply also to all non-arithmetic types
117 template<typename T>
118 typename std::enable_if<!std::is_unsigned<T>::value, T>::type
_q_interpolate(const T & f,const T & t,qreal progress)119 _q_interpolate(const T &f, const T &t, qreal progress)
120 {
121 return T(f + (t - f) * progress);
122 }
123
_q_interpolateVariant(const T & from,const T & to,qreal progress)124 template<typename T > inline QVariant _q_interpolateVariant(const T &from, const T &to, qreal progress)
125 {
126 return _q_interpolate(from, to, progress);
127 }
128
129
130 QT_END_NAMESPACE
131
132 #endif //QVARIANTANIMATION_P_H
133