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