qt-everywhere-src-5.14.1/qtbase/src/plugins/platforms/windows/qwindowstabletsupport.h

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#ifndef QWINDOWSTABLETSUPPORT_H
#define QWINDOWSTABLETSUPPORT_H

#include "qtwindowsglobal.h"
#include <QtGui/qtguiglobal.h>

#include <QtCore/qvector.h>
#include <QtCore/qpoint.h>
#include <QtCore/qhash.h>

#include <wintab.h>

QT_REQUIRE_CONFIG(tabletevent);

QT_BEGIN_NAMESPACE

class QDebug;
class QWindow;
class QRect;

struct QWindowsWinTab32DLL
{
    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 = nullptr;
    PtrWTClose wTClose = nullptr;
    PtrWTInfo wTInfo = nullptr;
    PtrWTEnable wTEnable = nullptr;
    PtrWTOverlap wTOverlap = nullptr;
    PtrWTPacketsGet wTPacketsGet = nullptr;
    PtrWTGet wTGet = nullptr;
    PtrWTQueueSizeGet wTQueueSizeGet = nullptr;
    PtrWTQueueSizeSet wTQueueSizeSet = nullptr;
};

struct QWindowsTabletDeviceData
{
    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 = 0;
    int maxPressure = 0;
    int minTanPressure = 0;
    int maxTanPressure = 0;
    int minX = 0;
    int maxX = 0;
    int minY = 0;
    int maxY = 0;
    int minZ = 0;
    int maxZ = 0;
    qint64 uniqueId = 0;
    int currentDevice = 0;
    int currentPointerType = 0;
    QHash<quint8, quint8> buttonsMap;
};

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

class QWindowsTabletSupport
{
    Q_DISABLE_COPY_MOVE(QWindowsTabletSupport)

    explicit QWindowsTabletSupport(HWND window, HCTX context);

public:
    enum Mode
    {
        PenMode,
        MouseMode
    };

    enum State
    {
        PenUp,
        PenProximity,
        PenDown
    };

    ~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(qint64 uniqueId, UINT cursorType) const;

    static QWindowsWinTab32DLL m_winTab32DLL;
    const HWND m_window;
    const HCTX m_context;
    int m_absoluteRange = 20;
    bool m_tiltSupport = false;
    QVector<QWindowsTabletDeviceData> m_devices;
    int m_currentDevice = -1;
    Mode m_mode = PenMode;
    State m_state = PenUp;
};

QT_END_NAMESPACE

#endif // QWINDOWSTABLETSUPPORT_H