aboutsummaryrefslogtreecommitdiffstats
path: root/menu/menu.c
blob: deb3805a919825d5482918241823a5df7ab7f226 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
/* -*- c -*- ------------------------------------------------------------- *
 *
 *   Copyright 2004 Murali Krishnan Ganapathy - All Rights Reserved
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
 *   Bostom MA 02111-1307, USA; either version 2 of the License, or
 *   (at your option) any later version; incorporated herein by reference.
 *
 * ----------------------------------------------------------------------- */

/* This program can be compiled for DOS with the OpenWatcom compiler
 * (http://www.openwatcom.org/):
 *
 * wcl -3 -osx -mt getargs.c
 */

#include "biosio.h"
#include "string.h"
#include "menu.h"
#include "heap.h"

// Local Variables
static pt_menusystem ms; // Pointer to the menusystem
static char TITLESTR[] = "COMBOOT Menu System for SYSLINUX developed by Murali Krishnan Ganapathy";
static char TITLELONG[] = " TITLE too long ";
static char ITEMLONG[] = " ITEM too long ";
static char ACTIONLONG[] = " ACTION too long ";
static char STATUSLONG[] = " STATUS too long ";
static char EMPTYSTR[] = "";

/* Basic Menu routines */

void drawbox(char top, char left, char bot, char right,char attr, char page)
{
  char x;
    
  // Top border
  gotoxy(top,left,page);
  cprint(TOPLEFT,attr,1,page);
  gotoxy(top,left+1,page);
  cprint(TOP,attr,right-left,page);
  gotoxy(top,right,page);
  cprint(TOPRIGHT,attr,1,page);
  // Bottom border
  gotoxy(bot,left,page);
  cprint(BOTLEFT,attr,1,page);
  gotoxy(bot,left+1,page);
  cprint(BOT,attr,right-left,page);
  gotoxy(bot,right,page);
  cprint(BOTRIGHT,attr,1,page);
  // Left & right borders
  for (x=top+1; x < bot; x++)
    {
      gotoxy(x,left,page);
      cprint(LEFT,attr,1,page);
      gotoxy(x,right,page);
      cprint(RIGHT,attr,1,page);
    }
}

int next_visible(pt_menu menu, int index) // Return index of next visible
{
  int ans;
  if (index < 0) ans = 0 ;
  else if (index >= menu->numitems) ans = menu->numitems-1;
  else ans = index;
  while ((ans < menu->numitems-1) && 
	 ((menu->items[ans]->action == OPT_INVISIBLE) || 
	  (menu->items[ans]->action == OPT_SEP))) 
    ans++;
  return ans;
}

int prev_visible(pt_menu menu, int index) // Return index of next visible
{
  int ans;
  if (index < 0) ans = 0;
  else if (index >= menu->numitems) ans = menu->numitems-1;
  else ans = index;
  while ((ans > 0) && 
	 ((menu->items[ans]->action == OPT_INVISIBLE) ||
	  (menu->items[ans]->action == OPT_SEP))) 
    ans--;
  return ans;
}

void printmenu(pt_menu menu, int curr, char top, char left)
{
  int x,row; // x = index, row = position from top
  int numitems,menuwidth;
  char fchar[5],lchar[5]; // The first and last char in for each entry
  const char *str;  // and inbetween the item or a seperator is printed
  char attr;  // all in the attribute attr
  char sep[MENULEN];// and inbetween the item or a seperator is printed
  pt_menuitem ci;
  
  calc_visible(menu);
  numitems = menu->numvisible;
  menuwidth = menu->menuwidth+3;
  clearwindow(top,left-2, top+numitems+1, left+menuwidth+1,
	      ms->menupage, ms->fillchar, ms->shadowattr);
  drawbox(top-1, left-3, top+numitems, left+menuwidth, 
	  ms->normalattr, ms->menupage);
  memset(sep,HORIZ,menuwidth); // String containing the seperator string
  sep[menuwidth-1] = 0; 
  // Menu title
  x = (menuwidth - strlen(menu->title) - 1) >> 1;
  gotoxy(top-1,left+x,ms->menupage);
  csprint(menu->title,ms->normalattr);
  row = -1; // 1 less than inital value of x
  for (x=0; x < menu->numitems; x++)
    {
      ci = menu->items[x];
      if (ci->action == OPT_INVISIBLE) continue;
      row++;
      // Setup the defaults now
      lchar[0] = fchar[0] = ' '; 
      lchar[1] = fchar[1] = '\0'; // fchar and lchar are just spaces
      str = ci->item; // Pointer to item string
      attr = (x==curr ? ms->reverseattr : ms->normalattr); // Normal attributes
      switch (ci->action) // set up attr,str,fchar,lchar for everything
        {
	case OPT_INACTIVE:
	  attr = (x==curr? ms->revinactattr : ms->inactattr);
	  break;
	case OPT_SUBMENU:
	  lchar[0] = SUBMENUCHAR; lchar[1] = 0;
	  break;
	case OPT_RADIOMENU:
	  lchar[0] = RADIOMENUCHAR; lchar[1] = 0;
	  break;
	case OPT_CHECKBOX:
	  lchar[0] = (ci->itemdata.checked ? CHECKED : UNCHECKED);
	  lchar[1] = 0;
	  break;
	case OPT_SEP:
	  fchar[0] = '\b'; fchar[1] = LTRT; fchar[2] = HORIZ; fchar[3] = HORIZ; fchar[4] = 0;
	  lchar[0] = HORIZ; lchar[1] = RTLT; lchar[3] = 0;
	  str = sep;
	  break;
	case OPT_EXITMENU:
	  fchar[0] = EXITMENUCHAR; fchar[1] = 0;
	  break;
	default: // Just to keep the compiler happy
	  break;
        }
      gotoxy(top+row,left-2,ms->menupage);
      cprint(ms->spacechar,attr,menuwidth+2,ms->menupage); // Wipe area with spaces
      gotoxy(top+row,left-2,ms->menupage);
      csprint(fchar,attr); // Print first part
      gotoxy(top+row,left,ms->menupage);
      csprint(str,attr); // Print main part
      gotoxy(top+row,left+menuwidth-1,ms->menupage); // Last char if any
      csprint(lchar,attr); // Print last part
    }
  if (ms->handler) ms->handler(ms,menu->items[curr]);
}

// Difference between this and regular menu, is that only 
// OPT_INVISIBLE, OPT_SEP are honoured 
void printradiomenu(pt_menu menu, int curr, char top, char left)
{
  int x,row; // x = index, row = position from top
  int numitems,menuwidth;
  char fchar[5],lchar[5]; // The first and last char in for each entry
  const char *str;  // and inbetween the item or a seperator is printed
  char attr;  // all in the attribute attr
  char sep[MENULEN];// and inbetween the item or a seperator is printed
  pt_menuitem ci;
  
  calc_visible(menu);
  numitems = menu->numvisible;
  menuwidth = menu->menuwidth+3;
  clearwindow(top,left-2, top+numitems+1, left+menuwidth+1,
	      ms->menupage, ms->fillchar, ms->shadowattr);
  drawbox(top-1, left-3, top+numitems, left+menuwidth, 
	  ms->normalattr, ms->menupage);
  memset(sep,HORIZ,menuwidth); // String containing the seperator string
  sep[menuwidth-1] = 0; 
  // Menu title
  x = (menuwidth - strlen(menu->title) - 1) >> 1;
  gotoxy(top-1,left+x,ms->menupage);
  csprint(menu->title,ms->normalattr);
  row = -1; // 1 less than inital value of x
  for (x=0; x < menu->numitems; x++)
    {
      ci = menu->items[x];
      if (ci->action == OPT_INVISIBLE) continue;
      row++;
      // Setup the defaults now
      fchar[0] = RADIOUNSEL; fchar[1]='\0'; // Unselected ( )
      lchar[0] = '\0'; // Nothing special after 
      str = ci->item; // Pointer to item string
      attr = ms->normalattr; // Always same attribute
      fchar[0] = (x==curr ? RADIOSEL : RADIOUNSEL); 
      switch (ci->action) // set up attr,str,fchar,lchar for everything
        {
	case OPT_INACTIVE:
	  attr = ms->inactattr;
	  break;
	case OPT_SEP:
	  fchar[0] = '\b'; fchar[1] = LTRT; fchar[2] = HORIZ; fchar[3] = HORIZ; fchar[4] = 0;
	  lchar[0] = HORIZ; lchar[1] = RTLT; lchar[3] = 0;
	  str = sep;
	  break;
	default: // To keep the compiler happy
	  break;
        }
      gotoxy(top+row,left-2,ms->menupage);
      cprint(ms->spacechar,attr,menuwidth+2,ms->menupage); // Wipe area with spaces
      gotoxy(top+row,left-2,ms->menupage);
      csprint(fchar,attr); // Print first part
      gotoxy(top+row,left,ms->menupage);
      csprint(str,attr); // Print main part
      gotoxy(top+row,left+menuwidth-1,ms->menupage); // Last char if any
      csprint(lchar,attr); // Print last part
    }
  if (ms->handler) ms->handler(ms,menu->items[curr]);
}

void cleanupmenu(pt_menu menu, char top,char left)
{
  clearwindow(top,left-2, top+menu->numvisible+1, left+menu->menuwidth+4,
	      ms->menupage, ms->fillchar, ms->fillattr); // Clear the shadow
  clearwindow(top-1, left-3, top+menu->numvisible, left+menu->menuwidth+3,
	      ms->menupage, ms->fillchar, ms->fillattr); // main window
}

/* Handle a radio menu */
pt_menuitem getradiooption(pt_menu menu, char top, char left, char startopt)
     // Return item chosen or NULL if ESC was hit.
{
  int curr,i;
  char asc,scan;
  char numitems;
  pt_menuitem ci; // Current item
    
  calc_visible(menu);
  numitems = menu->numvisible;
  // Setup status line
  gotoxy(ms->minrow+ms->statline,ms->mincol,ms->menupage);
  cprint(ms->spacechar,ms->reverseattr,ms->numcols,ms->menupage);

  // Initialise current menu item
  curr = next_visible(menu,startopt);

  gotoxy(ms->minrow+ms->statline,ms->mincol,ms->menupage);
  cprint(ms->spacechar,ms->statusattr,ms->numcols,1);
  gotoxy(ms->minrow+ms->statline,ms->mincol,ms->menupage);
  csprint(menu->items[curr]->status,ms->statusattr);
  while (1) // Forever
    {
      printradiomenu(menu,curr,top,left);
      ci = menu->items[curr];
      asc = inputc(&scan);
      switch (scan)
        {
	case HOMEKEY:
	  curr = next_visible(menu,0);
	  break;
	case ENDKEY:
	  curr = prev_visible(menu,numitems-1);
	  break;
	case PAGEDN:
	  for (i=0; i < 5; i++) curr = next_visible(menu,curr+1);
	  break;
	case PAGEUP:
	  for (i=0; i < 5; i++) curr = prev_visible(menu,curr-1);
	  break;
	case UPARROW:
	  curr = prev_visible(menu,curr-1);
	  break;
	case DNARROW:
	  curr = next_visible(menu,curr+1);
	  break;
	case LTARROW:
	case ESCAPE:
	  return NULL;
	  break;
	case RTARROW:
	case ENTERA:
	case ENTERB:
	  if (ci->action == OPT_INACTIVE) break;
	  if (ci->action == OPT_SEP) break;
	  return ci;
	  break;
        }
      // Adjust within range
      //if (curr < 0) curr=next_visible(menu,0);
      //if (curr >= numitems) curr = prev_visible(menu,numitems -1);
      // Update status line
      gotoxy(ms->minrow+ms->statline,ms->mincol,ms->menupage);
      cprint(ms->spacechar,ms->statusattr,ms->numcols,ms->menupage);
      csprint(menu->items[curr]->status,ms->statusattr);
    }
  return NULL; // Should never come here
}

/* Handle one menu */
pt_menuitem getmenuoption( pt_menu menu, char top, char left, char startopt)
     // Return item chosen or NULL if ESC was hit.
{
  int curr,i;
  char asc,scan;
  char numitems;
  pt_menuitem ci; // Current item
    
  calc_visible(menu);
  numitems = menu->numvisible;
  // Setup status line
  gotoxy(ms->minrow+ms->statline,ms->mincol,ms->menupage);
  cprint(ms->spacechar,ms->reverseattr,ms->numcols,ms->menupage);

  // Initialise current menu item    
  curr = next_visible(menu,startopt);

  gotoxy(ms->minrow+ms->statline,ms->mincol,ms->menupage);
  cprint(ms->spacechar,ms->statusattr,ms->numcols,1);
  gotoxy(ms->minrow+ms->statline,ms->mincol,ms->menupage);
  csprint(menu->items[curr]->status,ms->statusattr);
  while (1) // Forever
    {
      printmenu(menu,curr,top,left);
      ci = menu->items[curr];
      asc = inputc(&scan);
      switch (scan)
        {
	case HOMEKEY:
	  curr = next_visible(menu,0);
	  break;
	case ENDKEY:
	  curr = prev_visible(menu,numitems-1);
	  break;
	case PAGEDN:
	  for (i=0; i < 5; i++) curr = next_visible(menu,curr+1);
	  break;
	case PAGEUP:
	  for (i=0; i < 5; i++) curr = prev_visible(menu,curr-1);
	  break;
	case UPARROW:
	  curr = prev_visible(menu,curr-1);
	  break;
	case DNARROW:
	  curr = next_visible(menu,curr+1);
	  break;
	case LTARROW:
	case ESCAPE:
	  return NULL;
	  break;
	case RTARROW:
	case ENTERA:
	case ENTERB:
	  if (ci->action == OPT_INACTIVE) break;
	  if (ci->action == OPT_CHECKBOX) break;
	  if (ci->action == OPT_SEP) break;
	  if (ci->action == OPT_EXITMENU) return NULL; // As if we hit Esc
	  return ci;
	  break;
	case SPACEKEY:
	  if (ci->action != OPT_CHECKBOX) break;
	  ci->itemdata.checked = !ci->itemdata.checked;
	  // Call handler to see it anything needs to be done
	  if (ci->handler != NULL) ci->handler(ms,ci); 
	  break;
        }
      // Adjust within range
      //if (curr < 0) curr=next_visible(menu,0);
      //if (curr >= numitems) curr = prev_visible(menu,numitems -1);
      // Update status line
      gotoxy(ms->minrow+ms->statline,ms->mincol,ms->menupage);
      cprint(ms->spacechar,ms->statusattr,ms->numcols,ms->menupage);
      csprint(menu->items[curr]->status,ms->statusattr);
    }
  return NULL; // Should never come here
}

/* Handle the entire system of menu's. */
pt_menuitem runmenusystem(char top, char left, pt_menu cmenu, char startopt, char menutype)
     /*
      * cmenu
      *    Which menu should be currently displayed
      * top,left
      *    What is the position of the top,left corner of the menu
      * startopt
      *    which menu item do I start with
      * menutype
      *    NORMALMENU or RADIOMENU
      *
      * Return Value:
      *    Returns a pointer to the final item chosen, or NULL if nothing chosen.
      */
{
  pt_menuitem opt,choice;
  char startat,mt;
  char row,col;

  if (cmenu == NULL) return NULL;
 startover:
  if (menutype == NORMALMENU)
    opt = getmenuoption(cmenu,top,left,startopt);
  else // menutype == RADIOMENU
    opt = getradiooption(cmenu,top,left,startopt);

  if (opt == NULL)
    {
      // User hit Esc
      cleanupmenu(cmenu,top,left);
      return NULL;
    }
  // Are we done with the menu system?
  if ((opt->action != OPT_SUBMENU) && (opt->action != OPT_RADIOMENU)) 
    {
      cleanupmenu(cmenu,top,left);
      return opt; // parent cleanup other menus
    }
  // Either radiomenu or submenu
  // Do we have a valid menu number? The next hack uses the fact that 
  // itemdata.submenunum = itemdata.radiomenunum (since enum data type)
  if (opt->itemdata.submenunum >= ms->nummenus) // This is Bad....
    {
      gotoxy(12,12,ms->menupage); // Middle of screen
      csprint("ERROR: Invalid submenu requested.",0x07);
      cleanupmenu(cmenu,top,left);
      return NULL; // Pretend user hit esc
    }
  // Call recursively for submenu
  // Position the submenu below the current item,
  // covering half the current window (horizontally)
  row = ms->menus[(unsigned int)opt->itemdata.submenunum]->row;
  col = ms->menus[(unsigned int)opt->itemdata.submenunum]->col;
  if (row == 0xFF) row = top+opt->index+2;
  if (col == 0xFF) col = left+3+(cmenu->menuwidth >> 1);
  mt = (opt->action == OPT_SUBMENU ? NORMALMENU : RADIOMENU );
  startat = 0;
  if ((opt->action == OPT_RADIOMENU) && (opt->data != NULL))
    startat = ((t_menuitem *)opt->data)->index;

  choice = runmenusystem(row, col,
			 ms->menus[(unsigned int)opt->itemdata.submenunum],
			 startat, mt );
  if (opt->action == OPT_RADIOMENU)
    {
      if (choice != NULL) opt->data = (void *)choice; // store choice in data field
      if (opt->handler != NULL) opt->handler(ms,opt); // Call handler
      choice = NULL; // Pretend user hit esc
    }
  if (choice==NULL) // User hit Esc in submenu
    {
      // Startover
      startopt = opt->index;
      goto startover;
    }
  else
    {
      cleanupmenu(cmenu,top,left);
      return choice;
    }
}

/* User Callable functions */

pt_menuitem showmenus(char startmenu)
{
  pt_menuitem rv;
  char oldpage,tpos;

  // Setup screen for menusystem
  oldpage = getdisppage();
  setdisppage(ms->menupage);
  cls();
  clearwindow(ms->minrow, ms->mincol, ms->maxrow, ms->maxcol, 
	      ms->menupage, ms->fillchar, ms->fillattr);
  tpos = (ms->numcols - strlen(ms->title) - 1) >> 1; // center it on line    
  gotoxy(ms->minrow,ms->mincol,ms->menupage);
  cprint(ms->tfillchar,ms->titleattr,ms->numcols,ms->menupage);
  gotoxy(ms->minrow,ms->mincol+tpos,ms->menupage);
  csprint(ms->title,ms->titleattr);

  cursoroff(); // Doesn't seem to work?

  // Go, main menu cannot be a radio menu 
  rv = runmenusystem(ms->minrow+MENUROW, ms->mincol+MENUCOL, 
		     ms->menus[(unsigned int)startmenu], 0, NORMALMENU);

  // Hide the garbage we left on the screen
  cursoron();
  if (oldpage == ms->menupage) cls(); else setdisppage(oldpage);

  // Return user choice
  return rv;
}

void init_menusystem(const char *title)
{
  int i;
    
  ms = NULL;
  ms = (pt_menusystem) malloc(sizeof(t_menusystem));
  if (ms == NULL) return;
  ms->nummenus = 0;
  // Initialise all menu pointers
  for (i=0; i < MAXMENUS; i++) ms->menus[i] = NULL; 
    
  if (title == NULL)
    ms->title = TITLESTR; // Copy pointers
  else ms->title = title;

  ms->normalattr = NORMALATTR; 
  ms->reverseattr= REVERSEATTR;
  ms->inactattr = INACTATTR;
  ms->revinactattr = REVINACTATTR;

  ms->statusattr = STATUSATTR;
  ms->statline = STATLINE;
  ms->tfillchar= TFILLCHAR;
  ms->titleattr= TITLEATTR;
    
  ms->fillchar = FILLCHAR;
  ms->fillattr = FILLATTR;
  ms->spacechar= SPACECHAR;
  ms->shadowattr = SHADOWATTR;

  ms->menupage = MENUPAGE; // Usually no need to change this at all
  ms->handler = NULL; // No handler function

  // Figure out the size of the screen we are in now.
  // By default we use the whole screen for our menu
  ms->minrow = ms->mincol = 0;
  ms->numcols = getnumcols();
  ms->numrows = getnumrows();
  ms->maxcol = ms->numcols - 1;
  ms->maxrow = ms->numrows - 1;
}

void set_normal_attr(char normal, char selected, char inactivenormal, char inactiveselected)
{
  if (normal != 0xFF)           ms->normalattr   = normal;
  if (selected != 0xFF)         ms->reverseattr  = selected;
  if (inactivenormal != 0xFF)   ms->inactattr    = inactivenormal;
  if (inactiveselected != 0xFF) ms->revinactattr = inactiveselected;
}

void set_status_info(char statusattr, char statline)
{
  if (statusattr != 0xFF) ms->statusattr = statusattr;
  // statline is relative to minrow
  if (statline >= ms->numrows) statline = ms->numrows - 1;
  ms->statline = statline; // relative to ms->minrow, 0 based
}

void set_title_info(char tfillchar, char titleattr)
{
  if (tfillchar  != 0xFF) ms->tfillchar  = tfillchar;
  if (titleattr  != 0xFF) ms->titleattr  = titleattr;
}

void set_misc_info(char fillchar, char fillattr,char spacechar, char shadowattr)
{
  if (fillchar  != 0xFF) ms->fillchar  = fillchar;
  if (fillattr  != 0xFF) ms->fillattr  = fillattr;
  if (spacechar != 0xFF) ms->spacechar = spacechar;
  if (shadowattr!= 0xFF) ms->shadowattr= shadowattr;
}

void set_window_size(char top, char left, char bot, char right) // Set the window which menusystem should use
{
    
  char nr,nc;
  if ((top > bot) || (left > right)) return; // Sorry no change will happen here
  nr = getnumrows();
  nc = getnumcols();
  if (bot >= nr) bot = nr-1;
  if (right >= nc) right = nc-1;
  ms->minrow = top;
  ms->mincol = left;
  ms->maxrow = bot;
  ms->maxcol = right;
  ms->numcols = right - left + 1;
  ms->numrows = bot - top + 1;
  if (ms->statline >= ms->numrows) ms->statline = ms->numrows - 1; // Clip statline if need be
}

void reg_handler( t_menusystem_handler handler)
{
  ms->handler = handler;
}

void unreg_handler()
{
  ms->handler = NULL;
}

void calc_visible(pt_menu menu)
{
  int ans,i;

  if (menu == NULL) return;  
  ans = 0;
  for (i=0; i < menu->numitems; i++)
    if (menu->items[i]->action != OPT_INVISIBLE) ans++;
  menu->numvisible = ans;
}

char add_menu(const char *title) // Create a new menu and return its position
{
  int num,i;
  pt_menu m;

  num = ms->nummenus;
  if (num >= MAXMENUS) return -1;
  m = NULL;
  m = (pt_menu) malloc(sizeof(t_menu));
  if (m == NULL) return -1;
  ms->menus[num] = m;
  m->numitems = 0;
  m->row = 0xFF;
  m->col = 0xFF;
  for (i=0; i < MAXMENUSIZE; i++) m->items[i] = NULL;
   
  if (title)
    {
      if (strlen(title) > MENULEN - 2)
	m->title = TITLELONG;
      else m->title = title; 
    }
  else m->title = EMPTYSTR; 
  m ->menuwidth = strlen(m->title);
  ms->nummenus ++;
  return ms->nummenus - 1;
}

void set_menu_pos(char row,char col) // Set the position of this menu.
{
  pt_menu m;

  m = ms->menus[ms->nummenus-1];
  m->row = row;
  m->col = col;
}

pt_menuitem add_sep() // Add a separator to current menu
{
  pt_menuitem mi;
  pt_menu m;

  m = (ms->menus[ms->nummenus-1]);
  mi = NULL;
  mi = (pt_menuitem) malloc(sizeof(t_menuitem));
  if (mi == NULL) return NULL;
  m->items[(unsigned int)m->numitems] = mi;
  mi->handler = NULL; // No handler
  mi->item = mi->status = mi->data = EMPTYSTR;
  mi->action = OPT_SEP;
  mi->index = m->numitems++;
  mi->parindex = ms->nummenus-1;
  return mi;
}

// Add item to the "current" menu
pt_menuitem add_item(const char *item, const char *status, t_action action, 
		     const char *data, char itemdata) 
{
  pt_menuitem mi;
  pt_menu m;

  m = (ms->menus[ms->nummenus-1]);
  mi = NULL;
  mi = (pt_menuitem) malloc(sizeof(t_menuitem));
  if (mi == NULL) return NULL;
  m->items[(unsigned int) m->numitems] = mi;
  mi->handler = NULL; // No handler
  if (item) {
    if (strlen(item) > MENULEN - 2) {
      mi->item = ITEMLONG; 
    } else {
      mi->item = item; 
      if (strlen(item) > m->menuwidth) m->menuwidth = strlen(item);
    }
  } else mi->item = EMPTYSTR; 

  if (status) {
    if (strlen(status) > STATLEN - 2) {
      mi->status = STATUSLONG; 
    } else {
      mi->status = status; 
    }
  } else mi->status = EMPTYSTR; 
    
  mi->action = action;

  if (data) {
    if (strlen(data) > ACTIONLEN - 2) {
      mi->data = ACTIONLONG; 
    } else {
      mi->data = data; 
    }
  } else mi->data = EMPTYSTR; 

  switch (action)
    {
    case OPT_SUBMENU:
      mi->itemdata.submenunum = itemdata;
      break;
    case OPT_CHECKBOX:
      mi->itemdata.checked = itemdata;
      break;
    case OPT_RADIOMENU:
      mi->itemdata.radiomenunum = itemdata;
      mi->data = NULL; // No selection made
      break;
    default: // to keep the compiler happy
      break;
    }
  mi->index = m->numitems++;
  mi->parindex = ms->nummenus-1;
  return mi;
}