Category : Files from Magazines
Archive : CGAZ2-4.ZIP
Filename : MOUSE.C
Output of file : MOUSE.C contained in archive : CGAZ2-4.ZIP
* Program to display mouse primitives according *
* to Microsoft Mouse driver. Small memory model *
* (c) 1988 Nigel Cort. All Rights Reserved. *
**************************************************/
/* Verified under Datalight, Ecosoft, Lattice, Microsoft, Turbo C */
#include
#include
#ifdef min /* Some compilers retain min and max */
#undef min /* as macros. Here they are just variables. */
#undef max
#endif
union REGS inregs, outregs;
struct SREGS segregs; /* Called SREG under Ecosoft */
#define NO_MOUSE 0 /* No Mouse Driver Found */
#define SHOW 1 /* Service to show cursor */
#define HIDE 2 /* Service to hide cursor */
#define LEFT 1 /* Left Button */
#define RIGHT 2 /* Right Button */
#define CENTER 4 /* Center Button */
#define HORIZ 1 /* Cursor Directions */
#define VERT 2
int int_flag = 0; /*interrupt flag */
int check_mouse () /* Returns # of buttons on mouse. */
{ /* A return of 0 = no mouse installed.*/
inregs.x.ax = 0;
int86 (0x33, &inregs, &outregs);
if (!outregs.x.ax) /* AX = 0 -> no, AX = -1 -> yes */
return (NO_MOUSE);
else
return (outregs.x.bx); /* BX holds the number of buttons */
}
void display_m_cursor (mode) /* Toggle the display of mouse cursor */
int mode;
{
inregs.x.ax = mode;
int86 (0x33, &inregs, &outregs);
}
int check_position (p_x, p_y) /* Checks buttons pressed and posi- */
int *p_x, /* tion of mouse. It is passed ptrs */
*p_y; /* to update coordinates and returns*/
{ /* a binary sum of buttons pressed. */
inregs.x.ax = 3;
int86 (0x33, &inregs, &outregs);
*p_x = outregs.x.cx;
*p_y = outregs.x.dx;
return (outregs.x.bx);
}
void position_m_cursor (x, y) /* Position mouse curosr at x, y. */
int x, y; /* See text for discussion of units. */
{
inregs.x.ax = 4;
inregs.x.cx = x;
inregs.x.dx = y;
int86 (0x33, &inregs, &outregs);
}
void get_press (button, p_x, p_y, p_presses) /* Get # of presses and pos.*/
int button; /* Left 0, Ctr 4, Right 2 */
int *p_x, *p_y,
*p_presses; /* # presses since last call*/
{
inregs.x.ax = 5;
inregs.x.bx = button;
int86 (0x33, &inregs, &outregs);
*p_x = outregs.x.cx;
*p_y = outregs.x.dx;
*p_presses = outregs.x.bx;
}
void get_release (button, p_x, p_y, p_presses) /* Get # of presses and pos.*/
int button; /* Left 0, Ctr 4, Right 2 */
int *p_x, *p_y,
*p_presses; /* Releases since last call */
{
inregs.x.ax = 6;
inregs.x.bx = button;
int86 (0x33, &inregs, &outregs);
*p_x = outregs.x.cx;
*p_y = outregs.x.dx;
*p_presses = outregs.x.bx;
}
void limit_cursor (direction, min, max) /* Limit cursor's range of motion */
int direction, /* Vertical or horizontal */
min, max; /* Bounds. See text for units*/
{
inregs.x.cx = min;
inregs.x.dx = max;
switch (direction)
{
case (HORIZ):
inregs.x.ax = 7;
break;
case (VERT):
inregs.x.ax = 8;
break;
default: /* If it's not horiz or vert*/
return; /* it's an error; so get out*/
}
int86 (0x33, &inregs, &outregs);
}
void graphic_cursor (hot_x, hot_y, mask) /* Define gr. cursor and hot spot*/
int hot_x, hot_y; /* Coordinates of hot spot */
unsigned long (*mask) []; /* Ptr to array of unsigned */
{ /* longs (double words) */
inregs.x.ax = 9;
inregs.x.bx = hot_x;
inregs.x.cx = hot_y;
inregs.x.dx = mask;
int86 (0x33, &inregs, &outregs);
}
void text_cursor (type, b1, b2) /* Sets text cursor type & look */
int type; /* Hardware or software */
unsigned int b1, b2; /* Cursor parms */
{
inregs.x.ax = 10;
inregs.x.bx = type; /* soft = 0; hard = 1; */
inregs.x.cx = b1; /* scan lines if type = 1, */
inregs.x.dx = b2; /* else they are masks. */
int86 (0x33, &inregs, &outregs);
}
void get_mickeys (x, y) /* Get motion in mickeys since */
int *x, *y; /* the last call. Mickey = 1/200"*/
{
inregs.x.ax = 11;
int86 (0x33, &inregs, &outregs);
*x = outregs.x.cx; /* left is < 0; right > 0 */
*y = outregs.x.dx; /* down is < 0; right > 0 */
}
/*********** Programming Notes *************
Service 3: Buttons is 0 until a button action occurs
Buttons: L = 1, C = 4, R = 2;
Service 5 & 6 : Buttons Left = 0, Center = 2, Right = 1;
********************************************/
main () /* A simple driver for the mouse routines */
{
int i = 0;
int x, y, b, press;
static unsigned long masks [32] = /* Graphics masks */
{
0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, /* Screen Mask */
0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
0x8000, 0xE000, 0xF800, 0xD800, /* Cursor Mask */
0x0C00, 0x0600, 0x0300, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000
};
if ((i = check_mouse()) == 0)
{
puts ("No mouse found");
exit (-1);
}
else
printf ("Mouse with %d buttons found\n", i);
puts ("Cursor is visible");
display_m_cursor (SHOW);
getchar(); /* Get user's acknoledgement */
text_cursor (1, 12, 13); /* Text mode underscore cursor */
position_m_cursor (200, 80);
puts ("Now cursor is at 200, 80 and text mode");
getchar();
while (!kbhit()) /* Display changing locations */
{ /* as the mouse is moved. */
b = check_position (&x, &y);
printf ("Buttons: %d,mouse at %d column and %d row\r", b, x, y);
}
for (i = 0; i < 3; i++) /* Show mouse location when */
{ /* buttons were pressed. */
get_press (i, &x, &y, &press);
printf ("Button: %d, X: %d, Y: %d, Presses: %d\n",
i, x, y, press);
}
for (i = 0; i < 3; i++) /* Show mouse location when */
{ /* buttons were released. */
get_release (i, &x, &y, &press);
printf ("Button: %d, X: %d, Y: %d, Releases: %d\n",
i, x, y, press);
}
limit_cursor (HORIZ, 0, 80); /* Limit mouse cursor travel */
limit_cursor (VERT, 0, 80);
puts ("Cursor is limited to 80 x 80 and full");
text_cursor (0, 0x77FF, 0x7700); /* Make the cursor a block */
get_mickeys (&x, &y);
getchar(); getche(); /* Ecosoft doesnot use getche()*/
/* so call getcher twice. */
get_mickeys (&x, &y);
printf ("Mickeys since last call: %d, y: %d\n", x, y);
puts ("Cursor is now hidden");
display_m_cursor (HIDE);
getchar();
}
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