| /**************************************************************************** |
| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
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| ** |
| ** This file is part of the QtWidgets module of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:LGPL21$ |
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| |
| #ifndef QSCROLLER_H |
| #define QSCROLLER_H |
| |
| #include <QtCore/QObject> |
| #include <QtCore/QPointF> |
| #include <QtWidgets/QScrollerProperties> |
| |
| QT_BEGIN_NAMESPACE |
| |
| |
| class QWidget; |
| class QScrollerPrivate; |
| class QScrollerProperties; |
| #ifndef QT_NO_GESTURES |
| class QFlickGestureRecognizer; |
| class QMouseFlickGestureRecognizer; |
| #endif |
| |
| class Q_WIDGETS_EXPORT QScroller : public QObject |
| { |
| Q_OBJECT |
| Q_PROPERTY(State state READ state NOTIFY stateChanged) |
| Q_PROPERTY(QScrollerProperties scrollerProperties READ scrollerProperties WRITE setScrollerProperties NOTIFY scrollerPropertiesChanged) |
| |
| public: |
| enum State |
| { |
| Inactive, |
| Pressed, |
| Dragging, |
| Scrolling |
| }; |
| Q_ENUM(State) |
| |
| enum ScrollerGestureType |
| { |
| TouchGesture, |
| LeftMouseButtonGesture, |
| RightMouseButtonGesture, |
| MiddleMouseButtonGesture |
| }; |
| |
| enum Input |
| { |
| InputPress = 1, |
| InputMove, |
| InputRelease |
| }; |
| |
| static bool hasScroller(QObject *target); |
| |
| static QScroller *scroller(QObject *target); |
| static const QScroller *scroller(const QObject *target); |
| |
| #ifndef QT_NO_GESTURES |
| static Qt::GestureType grabGesture(QObject *target, ScrollerGestureType gestureType = TouchGesture); |
| static Qt::GestureType grabbedGesture(QObject *target); |
| static void ungrabGesture(QObject *target); |
| #endif |
| |
| static QList<QScroller *> activeScrollers(); |
| |
| QObject *target() const; |
| |
| State state() const; |
| |
| bool handleInput(Input input, const QPointF &position, qint64 timestamp = 0); |
| |
| void stop(); |
| QPointF velocity() const; |
| QPointF finalPosition() const; |
| QPointF pixelPerMeter() const; |
| |
| QScrollerProperties scrollerProperties() const; |
| |
| void setSnapPositionsX( const QList<qreal> &positions ); |
| void setSnapPositionsX( qreal first, qreal interval ); |
| void setSnapPositionsY( const QList<qreal> &positions ); |
| void setSnapPositionsY( qreal first, qreal interval ); |
| |
| public Q_SLOTS: |
| void setScrollerProperties(const QScrollerProperties &prop); |
| void scrollTo(const QPointF &pos); |
| void scrollTo(const QPointF &pos, int scrollTime); |
| void ensureVisible(const QRectF &rect, qreal xmargin, qreal ymargin); |
| void ensureVisible(const QRectF &rect, qreal xmargin, qreal ymargin, int scrollTime); |
| void resendPrepareEvent(); |
| |
| Q_SIGNALS: |
| void stateChanged(QScroller::State newstate); |
| void scrollerPropertiesChanged(const QScrollerProperties &); |
| |
| private: |
| QScrollerPrivate *d_ptr; |
| |
| QScroller(QObject *target); |
| virtual ~QScroller(); |
| |
| Q_DISABLE_COPY(QScroller) |
| Q_DECLARE_PRIVATE(QScroller) |
| |
| #ifndef QT_NO_GESTURES |
| friend class QFlickGestureRecognizer; |
| #endif |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QSCROLLER_H |