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39
40#ifndef QSCROLLERPROPERTIES_H
41#define QSCROLLERPROPERTIES_H
42
43#include <QtWidgets/qtwidgetsglobal.h>
44#include <QtCore/QScopedPointer>
45#include <QtCore/QMetaType>
46#include <QtCore/QVariant>
47
48QT_REQUIRE_CONFIG(scroller);
49
50QT_BEGIN_NAMESPACE
51
52
53class QScroller;
54class QScrollerPrivate;
55class QScrollerPropertiesPrivate;
56
57class Q_WIDGETS_EXPORT QScrollerProperties
58{
59public:
60 QScrollerProperties();
61 QScrollerProperties(const QScrollerProperties &sp);
62 QScrollerProperties &operator=(const QScrollerProperties &sp);
63 virtual ~QScrollerProperties();
64
65 bool operator==(const QScrollerProperties &sp) const;
66 bool operator!=(const QScrollerProperties &sp) const;
67
68 static void setDefaultScrollerProperties(const QScrollerProperties &sp);
69 static void unsetDefaultScrollerProperties();
70
71 enum OvershootPolicy
72 {
73 OvershootWhenScrollable,
74 OvershootAlwaysOff,
75 OvershootAlwaysOn
76 };
77
78 enum FrameRates {
79 Standard,
80 Fps60,
81 Fps30,
82 Fps20
83 };
84
85 enum ScrollMetric
86 {
87 MousePressEventDelay, // qreal [s]
88 DragStartDistance, // qreal [m]
89 DragVelocitySmoothingFactor, // qreal [0..1/s] (complex calculation involving time) v = v_new* DASF + v_old * (1-DASF)
90 AxisLockThreshold, // qreal [0..1] atan(|min(dx,dy)|/|max(dx,dy)|)
91
92 ScrollingCurve, // QEasingCurve
93 DecelerationFactor, // slope of the curve
94
95 MinimumVelocity, // qreal [m/s]
96 MaximumVelocity, // qreal [m/s]
97 MaximumClickThroughVelocity, // qreal [m/s]
98
99 AcceleratingFlickMaximumTime, // qreal [s]
100 AcceleratingFlickSpeedupFactor, // qreal [1..]
101
102 SnapPositionRatio, // qreal [0..1]
103 SnapTime, // qreal [s]
104
105 OvershootDragResistanceFactor, // qreal [0..1]
106 OvershootDragDistanceFactor, // qreal [0..1]
107 OvershootScrollDistanceFactor, // qreal [0..1]
108 OvershootScrollTime, // qreal [s]
109
110 HorizontalOvershootPolicy, // enum OvershootPolicy
111 VerticalOvershootPolicy, // enum OvershootPolicy
112 FrameRate, // enum FrameRates
113
114 ScrollMetricCount
115 };
116
117 QVariant scrollMetric(ScrollMetric metric) const;
118 void setScrollMetric(ScrollMetric metric, const QVariant &value);
119
120protected:
121 QScopedPointer<QScrollerPropertiesPrivate> d;
122
123private:
124 QScrollerProperties(QScrollerPropertiesPrivate &dd);
125
126 friend class QScrollerPropertiesPrivate;
127 friend class QScroller;
128 friend class QScrollerPrivate;
129};
130
131QT_END_NAMESPACE
132
133Q_DECLARE_METATYPE(QScrollerProperties::OvershootPolicy)
134Q_DECLARE_METATYPE(QScrollerProperties::FrameRates)
135
136#endif // QSCROLLERPROPERTIES_H
137

source code of qtbase/src/widgets/util/qscrollerproperties.h