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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QSCROLLER_H
#define QSCROLLER_H
#include <QtWidgets/qtwidgetsglobal.h>
#include <QtCore/QObject>
#include <QtCore/QPointF>
#include <QtWidgets/QScrollerProperties>
QT_REQUIRE_CONFIG(scroller);
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
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