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- /*
- 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 <stdio.h>
- #include <dos.h>
-
- 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);
- }
-