Category : Files from Magazines
Archive : VOL8N9.ZIP
Filename : MOUDEMO1.C
Output of file : MOUDEMO1.C contained in archive : VOL8N9.ZIP
MOUDEMO1.C --- Simple MS-DOS Demo of Mouse Driver
Copyright (C) 1989 Ziff Davis Communications
PC Magazine * Ray Duncan
Compile: CL MOUDEMO1.C
Usage: MOUDEMO1 (press both mouse buttons to exit)
*/
#include
#include
union REGS regs;
void cls(void); /* function prototypes */
void gotoxy(int, int);
int mopen(int *);
void mclose(int);
void mread(int, int *, int *, int *);
void mhide(int);
void munhide(int);
main(int argc, char *argv[])
{
int x,y,buttons; /* mouse state variables */
int mhandle; /* mouse handle from mopen */
if(! mopen(&mhandle)) /* exit if no mouse */
{
printf("\nMouse not available\n");
exit(1);
}
cls(); /* clear the screen */
gotoxy(45,0); /* and show help info */
puts("Press Both Mouse Buttons To Exit");
munhide(mhandle); /* make mouse cursor visible */
do { /* read mouse position & buttons */
mread(mhandle, &x, &y, &buttons);
gotoxy(0,0); /* display mouse status */
printf("X = %3d Y = %3d", x, y);
} while(buttons != 3); /* exit if both buttons down */
mhide(mhandle); /* hide mouse cursor */
mclose(mhandle); /* release mouse driver */
cls(); /* clear screen and exit */
}
/*
Clear the screen and position cursor at (x,y) = (0,0)
*/
void cls(void)
{
printf("\x01b[2J");
}
/*
Position cursor to (x,y); ANSI driver uses 1-based coordinates.
*/
void gotoxy(int x, int y)
{
printf("\x01b[%d;%dH",y+1,x+1);
}
/*
Initialize mouse driver, return mouse status and handle.
Status is true if mouse available, false if not. Handle is
dummy value in MS-DOS version.
*/
int mopen(int *handle)
{
regs.x.ax = 0; /* function 0 = reset driver */
int86(0x33, ®s, ®s);
*handle = 0; /* set dummy mouse handle */
return(regs.x.ax); /* and return status */
}
/*
Make mouse pointer visible. Mouse handle is dummy in MS-DOS version.
*/
void munhide(handle)
{
regs.x.ax = 1; /* function 1 = display pointer */
int86(0x33, ®s, ®s);
}
/*
Hide mouse pointer. Mouse handle is dummy in MS-DOS version.
*/
void mhide(handle)
{
regs.x.ax = 2; /* function 2 = hide pointer */
int86(0x33, ®s, ®s);
}
/*
Read mouse position and button status. Mouse handle is dummy
in MS-DOS version.
*/
void mread(int handle, int *x, int *y, int *buttons)
{
regs.x.ax = 3; /* function 3 = get position */
int86(0x33, ®s, ®s); /* and button status */
*buttons = regs.x.bx & 3;
*x = regs.x.cx;
*y = regs.x.dx;
}
/*
Release mouse driver. Mouse handle is dummy in MS-DOS version.
*/
void mclose(handle)
{
regs.x.ax = 0; /* function 0 = reset driver */
int86(0x33, ®s, ®s);
}
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