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#ifndef QSTANDARDGESTURES_H
#define QSTANDARDGESTURES_H

#include <QtGui/qevent.h>
#include <QtCore/qbasictimer.h>

#include <QtGui/qgesture.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

class QPanGesturePrivate;
class Q_GUI_EXPORT QPanGesture : public QGesture
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QPanGesture)

    Q_PROPERTY(QSizeF totalOffset READ totalOffset)
    Q_PROPERTY(QSizeF lastOffset READ lastOffset)
    Q_PROPERTY(QSizeF offset READ offset)

public:
    QPanGesture(QWidget *gestureTarget, QObject *parent = 0);

    bool filterEvent(QEvent *event);

    QSizeF totalOffset() const;
    QSizeF lastOffset() const;
    QSizeF offset() const;

protected:
    void reset();

private:
    bool event(QEvent *event);
    bool eventFilter(QObject *receiver, QEvent *event);

    friend class QWidget;
    friend class QAbstractScrollAreaPrivate;
};

class QPinchGesturePrivate;
class Q_GUI_EXPORT QPinchGesture : public QGesture
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QPinchGesture)

public:
    enum WhatChange {
        ScaleFactorChanged = 0x1,
        RotationAngleChanged = 0x2,
        CenterPointChanged = 0x4
    };
    Q_DECLARE_FLAGS(WhatChanged, WhatChange)

    Q_PROPERTY(WhatChanged whatChanged READ whatChanged)

    Q_PROPERTY(qreal totalScaleFactor READ totalScaleFactor)
    Q_PROPERTY(qreal lastScaleFactor READ lastScaleFactor)
    Q_PROPERTY(qreal scaleFactor READ scaleFactor)

    Q_PROPERTY(qreal totalRotationAngle READ totalRotationAngle)
    Q_PROPERTY(qreal lastRotationAngle READ lastRotationAngle)
    Q_PROPERTY(qreal rotationAngle READ rotationAngle)

    Q_PROPERTY(QPointF startCenterPoint READ startCenterPoint)
    Q_PROPERTY(QPointF lastCenterPoint READ lastCenterPoint)
    Q_PROPERTY(QPointF centerPoint READ centerPoint)

public:

    QPinchGesture(QWidget *gestureTarget, QObject *parent = 0);

    bool filterEvent(QEvent *event);
    void reset();

    WhatChanged whatChanged() const;

    QPointF startCenterPoint() const;
    QPointF lastCenterPoint() const;
    QPointF centerPoint() const;

    qreal totalScaleFactor() const;
    qreal lastScaleFactor() const;
    qreal scaleFactor() const;

    qreal totalRotationAngle() const;
    qreal lastRotationAngle() const;
    qreal rotationAngle() const;

private:
    bool event(QEvent *event);
    bool eventFilter(QObject *receiver, QEvent *event);

    friend class QWidget;
};

class QSwipeGesturePrivate;
class Q_GUI_EXPORT QSwipeGesture : public QGesture
{
    Q_OBJECT
    Q_ENUMS(SwipeDirection)

    Q_PROPERTY(SwipeDirection horizontalDirection READ horizontalDirection)
    Q_PROPERTY(SwipeDirection verticalDirection READ verticalDirection)
    Q_PROPERTY(qreal swipeAngle READ swipeAngle)

    Q_DECLARE_PRIVATE(QSwipeGesture)

public:
    enum SwipeDirection { NoDirection, Left, Right, Up, Down };
    QSwipeGesture(QWidget *gestureTarget, QObject *parent = 0);

    bool filterEvent(QEvent *event);
    void reset();

    SwipeDirection horizontalDirection() const;
    SwipeDirection verticalDirection() const;
    qreal swipeAngle() const;

private:
    bool eventFilter(QObject *receiver, QEvent *event);

    friend class QWidget;
};
QT_END_NAMESPACE

QT_END_HEADER

#endif // QSTANDARDGESTURES_H