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#ifndef QWINDOWSTABLETSUPPORT_H
#define QWINDOWSTABLETSUPPORT_H

#include "qtwindowsglobal.h"

#if !defined(QT_NO_TABLETEVENT) && !defined(Q_OS_WINCE)

#include <QtCore/QVector>
#include <QtCore/QPointF>

#include <wintab.h>

QT_BEGIN_NAMESPACE

class QDebug;
class QWindow;
class QRect;

struct QWindowsWinTab32DLL
{
    QWindowsWinTab32DLL() : wTOpen(0), wTClose(0), wTInfo(0), wTEnable(0), wTOverlap(0), wTPacketsGet(0), wTGet(0),
        wTQueueSizeGet(0), wTQueueSizeSet(0) {}

    bool init();

    typedef HCTX (API *PtrWTOpen)(HWND, LPLOGCONTEXT, BOOL);
    typedef BOOL (API *PtrWTClose)(HCTX);
    typedef UINT (API *PtrWTInfo)(UINT, UINT, LPVOID);
    typedef BOOL (API *PtrWTEnable)(HCTX, BOOL);
    typedef BOOL (API *PtrWTOverlap)(HCTX, BOOL);
    typedef int  (API *PtrWTPacketsGet)(HCTX, int, LPVOID);
    typedef BOOL (API *PtrWTGet)(HCTX, LPLOGCONTEXT);
    typedef int  (API *PtrWTQueueSizeGet)(HCTX);
    typedef BOOL (API *PtrWTQueueSizeSet)(HCTX, int);

    PtrWTOpen wTOpen;
    PtrWTClose wTClose;
    PtrWTInfo wTInfo;
    PtrWTEnable wTEnable;
    PtrWTOverlap wTOverlap;
    PtrWTPacketsGet wTPacketsGet;
    PtrWTGet wTGet;
    PtrWTQueueSizeGet wTQueueSizeGet;
    PtrWTQueueSizeSet wTQueueSizeSet;
};

struct QWindowsTabletDeviceData
{
    QWindowsTabletDeviceData() : minPressure(0), maxPressure(0), minTanPressure(0),
        maxTanPressure(0), minX(0), maxX(0), minY(0), maxY(0), minZ(0), maxZ(0),
        uniqueId(0), currentDevice(0), currentPointerType(0) {}

    QPointF scaleCoordinates(int coordX, int coordY,const QRect &targetArea) const;
    qreal scalePressure(qreal p) const { return p / qreal(maxPressure - minPressure); }
    qreal scaleTangentialPressure(qreal p) const { return p / qreal(maxTanPressure - minTanPressure); }

    int minPressure;
    int maxPressure;
    int minTanPressure;
    int maxTanPressure;
    int minX, maxX, minY, maxY, minZ, maxZ;
    qint64 uniqueId;
    int currentDevice;
    int currentPointerType;
};

#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug d, const QWindowsTabletDeviceData &t);
#endif

class QWindowsTabletSupport
{
    Q_DISABLE_COPY(QWindowsTabletSupport)

    explicit QWindowsTabletSupport(HWND window, HCTX context);

public:
    ~QWindowsTabletSupport();

    static QWindowsTabletSupport *create();

    void notifyActivate();
    QString description() const;

    bool translateTabletProximityEvent(WPARAM wParam, LPARAM lParam);
    bool translateTabletPacketEvent();

    int absoluteRange() const { return m_absoluteRange; }
    void setAbsoluteRange(int a) { m_absoluteRange = a; }

private:
    unsigned options() const;
    QWindowsTabletDeviceData tabletInit(const quint64 uniqueId, const UINT cursorType) const;

    static QWindowsWinTab32DLL m_winTab32DLL;
    const HWND m_window;
    const HCTX m_context;
    int m_absoluteRange;
    bool m_tiltSupport;
    QVector<QWindowsTabletDeviceData> m_devices;
    int m_currentDevice;
    QPointF m_oldGlobalPosF;
};

QT_END_NAMESPACE

#endif // !QT_NO_TABLETEVENT && !Q_OS_WINCE
#endif // QWINDOWSTABLETSUPPORT_H