tablet.h

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// $Id: tablet.h 751 2006-03-31 15:43:49Z alex $
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 */
// Tablet.h : header file
//

// WEBSTER - markn 25/4/97
// No tablet stuff required in Webster
#ifdef WEBSTER
#define INC_TABLET
#endif // WEBSTER

#ifndef INC_TABLET
#define INC_TABLET

#include "pen.h"
#include "wintab.h"


/********************************************************************************************

>   class WinTabPressurePen : public CCPen

    Author:     Martin_Donelly (Xara Group Ltd) <camelotdev@xara.com> (& Jason)

    Created:    24/1/97

    Purpose:    Overrides the base pressure-sensitive pen class to provide support
                for WinTab pressure-sensitive tablet devices. When such a device
                is unavailable, this class returns control to the base-class to
                allow joysticks and mice to be used to simulate pens based on speed
                and/or direction of travel rather than real applied pressure.

********************************************************************************************/

class WinTabPressurePen : public CCPen
{
    CC_DECLARE_DYNAMIC(WinTabPressurePen);

public:
    WinTabPressurePen();
    ~WinTabPressurePen();

protected:      // Upcalls to derived classes. If they don't handle this they should call the base class
    virtual BOOL ReadTabletPressureData(void);
    virtual void StartStroke(void);
    virtual void EndStroke(void);


protected:
    void InitPressure(void);
            // Works out how to get pressure information from the tablet, and initialises
            // scaling values, etc.


public:         // Special interfaces called by the MainFrame on WT_ messages
    void PenProximityChanged(BOOL LeavingTablet);


protected:      // Internal variables
    HCTX hTab;                  // WinTab handle to the tablet

    UINT32 wActiveCsr;          // Old and current cursors
    UINT32 wOldCsr;

    BYTE wPrsBtn;               // Indicates which data channel is the pressure "button"

    UINT32 ClickThreshold;      // Pressure value at which the pen is considered to be "clicked"

    BOOL PenNotOnTablet;        // Proximity flag - TRUE when Pen is not in use
};


#endif

---