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/*

 * Copyright (c) 1999 Greg Haerr <greg@censoft.com>

 *

 * NULL Mouse Driver

 */

#include <stdio.h>

#include "device.h"

#define SCALE           3       /* default scaling factor for acceleration */

#define THRESH          5       /* default threshhold for acceleration */

static int      NUL_Open(MOUSEDEVICE *pmd);

static void     NUL_Close(void);

static int      NUL_GetButtonInfo(void);

static void     NUL_GetDefaultAccel(int *pscale,int *pthresh);

static int      NUL_Read(MWCOORD *dx, MWCOORD *dy, MWCOORD *dz, int *bp);

static int      NUL_Poll(void);

MOUSEDEVICE mousedev = {

        NUL_Open,

        NUL_Close,

        NUL_GetButtonInfo,

        NUL_GetDefaultAccel,

        NUL_Read,

        NUL_Poll

};

/*

 * Poll for events

 */

static int

NUL_Poll(void)

{

  return 0;

}

/*

 * Open up the mouse device.

 */

static int

NUL_Open(MOUSEDEVICE *pmd)

{

        return -2;      /* no mouse*/

}

/*

 * Close the mouse device.

 */

static void

NUL_Close(void)

{

}

/*

 * Get mouse buttons supported

 */

static int

NUL_GetButtonInfo(void)

{

        return 0;

}

/*

 * Get default mouse acceleration settings

 */

static void

NUL_GetDefaultAccel(int *pscale,int *pthresh)

{

        *pscale = SCALE;

        *pthresh = THRESH;

}

/*

 * Attempt to read bytes from the mouse and interpret them.

 * Returns -1 on error, 0 if either no bytes were read or not enough

 * was read for a complete state, or 1 if the new state was read.

 * When a new state is read, the current buttons and x and y deltas

 * are returned.  This routine does not block.

 */

static int

NUL_Read(MWCOORD *dx, MWCOORD *dy, MWCOORD *dz, int *bp)

{

        return 0;

}