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39
40#ifndef QQUICKWHEELHANDLER_H
41#define QQUICKWHEELHANDLER_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 "qquickitem.h"
55#include "qevent.h"
56#include "qquicksinglepointhandler_p.h"
57
58QT_BEGIN_NAMESPACE
59
60class QQuickWheelEvent;
61class QQuickWheelHandlerPrivate;
62
63class Q_QUICK_PRIVATE_EXPORT QQuickWheelHandler : public QQuickSinglePointHandler
64{
65 Q_OBJECT
66 Q_PROPERTY(Qt::Orientation orientation READ orientation WRITE setOrientation NOTIFY orientationChanged)
67 Q_PROPERTY(bool invertible READ isInvertible WRITE setInvertible NOTIFY invertibleChanged)
68 Q_PROPERTY(qreal activeTimeout READ activeTimeout WRITE setActiveTimeout NOTIFY activeTimeoutChanged)
69 Q_PROPERTY(qreal rotation READ rotation WRITE setRotation NOTIFY rotationChanged)
70 Q_PROPERTY(qreal rotationScale READ rotationScale WRITE setRotationScale NOTIFY rotationScaleChanged)
71 Q_PROPERTY(QString property READ property WRITE setProperty NOTIFY propertyChanged)
72 Q_PROPERTY(qreal targetScaleMultiplier READ targetScaleMultiplier WRITE setTargetScaleMultiplier NOTIFY targetScaleMultiplierChanged)
73 Q_PROPERTY(bool targetTransformAroundCursor READ isTargetTransformAroundCursor WRITE setTargetTransformAroundCursor NOTIFY targetTransformAroundCursorChanged)
74
75 QML_NAMED_ELEMENT(WheelHandler)
76 QML_ADDED_IN_MINOR_VERSION(14)
77
78public:
79 explicit QQuickWheelHandler(QQuickItem *parent = nullptr);
80
81 Qt::Orientation orientation() const;
82 void setOrientation(Qt::Orientation orientation);
83
84 bool isInvertible() const;
85 void setInvertible(bool invertible);
86
87 qreal activeTimeout() const;
88 void setActiveTimeout(qreal timeout);
89
90 qreal rotation() const;
91 void setRotation(qreal rotation);
92
93 qreal rotationScale() const;
94 void setRotationScale(qreal rotationScale);
95
96 QString property() const;
97 void setProperty(const QString &name);
98
99 qreal targetScaleMultiplier() const;
100 void setTargetScaleMultiplier(qreal targetScaleMultiplier);
101
102 bool isTargetTransformAroundCursor() const;
103 void setTargetTransformAroundCursor(bool ttac);
104
105Q_SIGNALS:
106 void wheel(QQuickPointerScrollEvent *event);
107
108 void orientationChanged();
109 void invertibleChanged();
110 void activeTimeoutChanged();
111 void rotationChanged();
112 void rotationScaleChanged();
113 void propertyChanged();
114 void targetScaleMultiplierChanged();
115 void targetTransformAroundCursorChanged();
116
117protected:
118 bool wantsPointerEvent(QQuickPointerEvent *event) override;
119 void handleEventPoint(QQuickEventPoint *point) override;
120 void onTargetChanged(QQuickItem *oldTarget) override;
121 void onActiveChanged() override;
122 void timerEvent(QTimerEvent *event) override;
123
124 Q_DECLARE_PRIVATE(QQuickWheelHandler)
125};
126
127QT_END_NAMESPACE
128
129QML_DECLARE_TYPE(QQuickWheelHandler)
130
131#endif // QQUICKWHEELHANDLER_H
132

source code of qtdeclarative/src/quick/handlers/qquickwheelhandler_p.h