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MOUSE.C
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C/C++ Source or Header
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1990-06-14
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2KB
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68 lines
/* mouse.c -- Routines to support a Microsoft compatible mouse.
* This package assumes that you are running under graphics mode.
*/
#include <dos.h>
#include <graphics.h>
#include <stdio.h>
#include "mouse.h"
/* Communicates with the mouse driver */
void mouse(int *m1, int *m2, int *m3, int *m4)
{
union REGS inregs, outregs;
inregs.x.ax = *m1; inregs.x.bx = *m2;
inregs.x.cx = *m3; inregs.x.dx = *m4;
int86(0x33,&inregs,&outregs);
*m1 = outregs.x.ax; *m2 = outregs.x.bx;
*m3 = outregs.x.cx; *m4 = outregs.x.dx;
}
/* Initialize the mouse */
int initmouse(void)
{
int gmode, m1, m2, m3, m4;
char far *memory = (char far *)0x004000049L;
m1 = RESET_MOUSE; mouse(&m1,&m2,&m3,&m4);
if (m1) {
/* Hercules card requires an extra step */
gmode = getgraphmode();
if (gmode == HERCMONOHI) {
*memory = 0x06;
m1 = RESET_MOUSE; mouse(&m1,&m2,&m3,&m4);
}
mousestatus(SHOW_MOUSE);
return(1);
}
else /* Mouse not found, return failure flag */
return(0);
}
/* Hide or show the mouse */
void mousestatus(int stateofmouse)
{
int m2, m3, m4;
mouse(&stateofmouse,&m2,&m3,&m4);
}
/* Get the current location of the mouse cursor */
void getmousecoords(int *x, int *y)
{
int m1, m2;
m1 = GET_MOUSE_STATUS; mouse(&m1,&m2,x,y);
/* Adjust for virtual coordinates of the mouse */
if (getmaxx() == 319) (*x) /= 2;
}
/* Returns 1 if the mouse button condition specified occurred */
int buttonstatus(int condition, int whichbutton)
{
int m3, m4;
mouse(&condition,&whichbutton,&m3,&m4);
if (whichbutton) return(1); else return(0);
}