| 1 |
/* Copyright (c) 1992 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* Microsoft Mouse handling routines |
| 9 |
*/ |
| 10 |
|
| 11 |
#include <stdio.h> |
| 12 |
#include <dos.h> |
| 13 |
#include <i86.h> |
| 14 |
#include <graph.h> |
| 15 |
#include "driver.h" |
| 16 |
|
| 17 |
#define M_RIGHTBUTT 0x8 |
| 18 |
#define M_LEFTBUTT 0x2 |
| 19 |
#define M_MOTION 0x1 |
| 20 |
|
| 21 |
static int ydispsize; |
| 22 |
static int crad; |
| 23 |
#define right_button (mouse_event & M_RIGHTBUTT) |
| 24 |
#define left_button (mouse_event & M_LEFTBUTT) |
| 25 |
static int mouse_event = 0; |
| 26 |
static int mouse_xpos = -1; |
| 27 |
static int mouse_ypos = -1; |
| 28 |
|
| 29 |
|
| 30 |
#pragma off (check_stack) |
| 31 |
static void _loadds far mouse_handler (int max, int mcx, int mdx) |
| 32 |
{ |
| 33 |
#pragma aux mouse_handler parm [EAX] [ECX] [EDX] |
| 34 |
mouse_event = max; |
| 35 |
mouse_xpos = mcx; |
| 36 |
mouse_ypos = mdx; |
| 37 |
} |
| 38 |
#pragma on (check_stack) |
| 39 |
|
| 40 |
|
| 41 |
static void |
| 42 |
move_cursor(newx, newy) /* move cursor to new position */ |
| 43 |
int newx, newy; |
| 44 |
{ |
| 45 |
extern char *bmalloc(); |
| 46 |
static char *imp = NULL; |
| 47 |
static int curx = -1, cury = -1; |
| 48 |
|
| 49 |
if (imp == NULL && |
| 50 |
(imp = bmalloc(_imagesize(0,0,2*crad+1,2*crad+1))) == NULL) { |
| 51 |
eputs("out of memory in move_cursor"); |
| 52 |
quit(1); |
| 53 |
} |
| 54 |
if (curx >= 0 & cury >= 0) /* clear old cursor */ |
| 55 |
_putimage(curx-crad, cury-crad, imp, _GPSET); |
| 56 |
/* record new position */ |
| 57 |
curx = newx; cury = newy; |
| 58 |
if (curx < 0 | cury < 0) |
| 59 |
return; /* no cursor */ |
| 60 |
/* save under new cursor */ |
| 61 |
_getimage(newx-crad,newy-crad,newx+crad,newy+crad, imp); |
| 62 |
/* draw new cursor */ |
| 63 |
_setcolor(1); |
| 64 |
_rectangle(_GFILLINTERIOR, newx-crad, newy-1, newx+crad, newy+1); |
| 65 |
_rectangle(_GFILLINTERIOR, newx-1, newy-crad, newx+1, newy+crad); |
| 66 |
_setcolor(0); |
| 67 |
_moveto(newx-crad+1, newy); |
| 68 |
_lineto(newx+crad-1, newy); |
| 69 |
_moveto(newx, newy-crad+1); |
| 70 |
_lineto(newx, newy+crad-1); |
| 71 |
} |
| 72 |
|
| 73 |
|
| 74 |
static int |
| 75 |
ms_getcur(xp, yp) /* get mouse cursor position */ |
| 76 |
int *xp, *yp; |
| 77 |
{ |
| 78 |
/* show cursor */ |
| 79 |
|
| 80 |
move_cursor(mouse_xpos, mouse_ypos); |
| 81 |
|
| 82 |
/* update cursor until button pressed */ |
| 83 |
|
| 84 |
do { |
| 85 |
mouse_event = 0; |
| 86 |
while( !mouse_event ) |
| 87 |
if (kbhit()) |
| 88 |
switch (getch()) { |
| 89 |
case MB1: |
| 90 |
mouse_event = M_LEFTBUTT; |
| 91 |
break; |
| 92 |
case MB2: |
| 93 |
case MB3: |
| 94 |
mouse_event = M_RIGHTBUTT; |
| 95 |
break; |
| 96 |
default: |
| 97 |
mouse_event = M_RIGHTBUTT | M_LEFTBUTT; |
| 98 |
break; |
| 99 |
} |
| 100 |
if (mouse_event & M_MOTION) |
| 101 |
move_cursor(mouse_xpos, mouse_ypos); |
| 102 |
} while (!(mouse_event & (M_RIGHTBUTT|M_LEFTBUTT))); |
| 103 |
|
| 104 |
/* clear cursor */ |
| 105 |
|
| 106 |
move_cursor(-1, -1); |
| 107 |
|
| 108 |
/* compute final position */ |
| 109 |
|
| 110 |
if (mouse_xpos < 0 | mouse_ypos < 0) |
| 111 |
return(ABORT); |
| 112 |
|
| 113 |
*xp = mouse_xpos; |
| 114 |
*yp = ydispsize-1 - mouse_ypos; |
| 115 |
|
| 116 |
switch (mouse_event) { |
| 117 |
case M_LEFTBUTT: |
| 118 |
case M_LEFTBUTT|M_MOTION: |
| 119 |
return(MB1); |
| 120 |
case M_RIGHTBUTT: |
| 121 |
case M_RIGHTBUTT|M_MOTION: |
| 122 |
return(MB2); |
| 123 |
} |
| 124 |
return(ABORT); |
| 125 |
} |
| 126 |
|
| 127 |
|
| 128 |
void |
| 129 |
ms_gcinit( dp ) |
| 130 |
struct driver *dp; |
| 131 |
{ |
| 132 |
struct SREGS sregs; |
| 133 |
union REGS inregs, outregs; |
| 134 |
int far *ptr; |
| 135 |
int (far *function_ptr)(); |
| 136 |
|
| 137 |
segread(&sregs); |
| 138 |
|
| 139 |
/* check for mouse driver */ |
| 140 |
|
| 141 |
inregs.w.ax = 0; |
| 142 |
int386 (0x33, &inregs, &outregs); |
| 143 |
if( outregs.w.ax != -1 ) { |
| 144 |
dp->getcur = NULL; |
| 145 |
return; |
| 146 |
} |
| 147 |
|
| 148 |
/* get relevant parameters */ |
| 149 |
|
| 150 |
ydispsize = dp->ysiz; |
| 151 |
crad = dp->ysiz/40; |
| 152 |
|
| 153 |
/* install watcher */ |
| 154 |
|
| 155 |
inregs.w.ax = 0xC; |
| 156 |
inregs.w.cx = M_RIGHTBUTT | M_LEFTBUTT | M_MOTION; |
| 157 |
function_ptr = mouse_handler; |
| 158 |
inregs.x.edx = FP_OFF( function_ptr ); |
| 159 |
sregs.es = FP_SEG( function_ptr ); |
| 160 |
int386x( 0x33, &inregs, &outregs, &sregs ); |
| 161 |
|
| 162 |
dp->getcur = ms_getcur; |
| 163 |
} |
