1/****************************************************************************
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28
29/****************************************************************************
30 *   Author:  Juergen Pfeifer, 1995,1997                                    *
31 ****************************************************************************/
32
33/***************************************************************************
34* Module m_post                                                            *
35* Write or erase menus from associated subwindows                          *
36***************************************************************************/
37
38#include "menu.priv.h"
39
40MODULE_ID("$Id: m_post.c,v 1.26 2004/12/25 23:57:04 tom Exp $")
41
42/*---------------------------------------------------------------------------
43|   Facility      :  libnmenu
44|   Function      :  void _nc_Post_Item(MENU *menu, ITEM *item)
45|
46|   Description   :  Draw the item in the menus window at the current
47|                    window position
48|
49|   Return Values :  -
50+--------------------------------------------------------------------------*/
51NCURSES_EXPORT(void)
52_nc_Post_Item(const MENU * menu, const ITEM * item)
53{
54  int i;
55  chtype ch;
56  int item_x, item_y;
57  int count = 0;
58  bool isfore = FALSE, isback = FALSE, isgrey = FALSE;
59  int name_len;
60  int desc_len;
61
62  assert(menu->win);
63
64  getyx(menu->win, item_y, item_x);
65
66  /* We need a marker iff
67     - it is a onevalued menu and it is the current item
68     - or it has a selection value
69   */
70  wattron(menu->win, menu->back);
71  if (item->value || (item == menu->curitem))
72    {
73      if (menu->marklen)
74	{
75	  /* In a multi selection menu we use the fore attribute
76	     for a selected marker that is not the current one.
77	     This improves visualization of the menu, because now
78	     always the 'normal' marker denotes the current
79	     item. */
80	  if (!(menu->opt & O_ONEVALUE) && item->value && item != menu->curitem)
81	    {
82	      wattron(menu->win, menu->fore);
83	      isfore = TRUE;
84	    }
85	  waddstr(menu->win, menu->mark);
86	  if (isfore)
87	    {
88	      wattron(menu->win, menu->fore);
89	      isfore = FALSE;
90	    }
91	}
92    }
93  else				/* otherwise we have to wipe out the marker area */
94    for (ch = ' ', i = menu->marklen; i > 0; i--)
95      waddch(menu->win, ch);
96  wattroff(menu->win, menu->back);
97  count += menu->marklen;
98
99  /* First we have to calculate the attribute depending on selectability
100     and selection status
101   */
102  if (!(item->opt & O_SELECTABLE))
103    {
104      wattron(menu->win, menu->grey);
105      isgrey = TRUE;
106    }
107  else
108    {
109      if (item->value || item == menu->curitem)
110	{
111	  wattron(menu->win, menu->fore);
112	  isfore = TRUE;
113	}
114      else
115	{
116	  wattron(menu->win, menu->back);
117	  isback = TRUE;
118	}
119    }
120
121  waddnstr(menu->win, item->name.str, item->name.length);
122  name_len = _nc_Calculate_Text_Width(&(item->name));
123  for (ch = ' ', i = menu->namelen - name_len; i > 0; i--)
124    {
125      waddch(menu->win, ch);
126    }
127  count += menu->namelen;
128
129  /* Show description if required and available */
130  if ((menu->opt & O_SHOWDESC) && menu->desclen > 0)
131    {
132      int m = menu->spc_desc / 2;
133      int cy = -1, cx = -1;
134
135      for (ch = ' ', i = 0; i < menu->spc_desc; i++)
136	{
137	  if (i == m)
138	    {
139	      waddch(menu->win, menu->pad);
140	      getyx(menu->win, cy, cx);
141	    }
142	  else
143	    waddch(menu->win, ch);
144	}
145      if (item->description.length)
146	waddnstr(menu->win, item->description.str, item->description.length);
147      desc_len = _nc_Calculate_Text_Width(&(item->description));
148      for (ch = ' ', i = menu->desclen - desc_len; i > 0; i--)
149	{
150	  waddch(menu->win, ch);
151	}
152      count += menu->desclen + menu->spc_desc;
153
154      if (menu->spc_rows > 1)
155	{
156	  int j, k, ncy, ncx;
157
158	  assert(cx >= 0 && cy >= 0);
159	  getyx(menu->win, ncy, ncx);
160	  if (isgrey)
161	    wattroff(menu->win, menu->grey);
162	  else if (isfore)
163	    wattroff(menu->win, menu->fore);
164	  wattron(menu->win, menu->back);
165	  for (j = 1; j < menu->spc_rows; j++)
166	    {
167	      if ((item_y + j) < getmaxy(menu->win))
168		{
169		  wmove(menu->win, item_y + j, item_x);
170		  for (k = 0; k < count; k++)
171		    waddch(menu->win, ' ');
172		}
173	      if ((cy + j) < getmaxy(menu->win))
174		mvwaddch(menu->win, cy + j, cx - 1, menu->pad);
175	    }
176	  wmove(menu->win, ncy, ncx);
177	  if (!isback)
178	    wattroff(menu->win, menu->back);
179	}
180    }
181
182  /* Remove attributes */
183  if (isfore)
184    wattroff(menu->win, menu->fore);
185  if (isback)
186    wattroff(menu->win, menu->back);
187  if (isgrey)
188    wattroff(menu->win, menu->grey);
189}
190
191/*---------------------------------------------------------------------------
192|   Facility      :  libnmenu
193|   Function      :  void _nc_Draw_Menu(const MENU *)
194|
195|   Description   :  Display the menu in its windows
196|
197|   Return Values :  -
198+--------------------------------------------------------------------------*/
199NCURSES_EXPORT(void)
200_nc_Draw_Menu(const MENU * menu)
201{
202  ITEM *item = menu->items[0];
203  ITEM *lasthor, *lastvert;
204  ITEM *hitem;
205  int y = 0;
206  chtype s_bkgd;
207
208  assert(item && menu->win);
209
210  s_bkgd = getbkgd(menu->win);
211  wbkgdset(menu->win, menu->back);
212  werase(menu->win);
213  wbkgdset(menu->win, s_bkgd);
214
215  lastvert = (menu->opt & O_NONCYCLIC) ? (ITEM *) 0 : item;
216
217  do
218    {
219      wmove(menu->win, y, 0);
220
221      hitem = item;
222      lasthor = (menu->opt & O_NONCYCLIC) ? (ITEM *) 0 : hitem;
223
224      do
225	{
226	  _nc_Post_Item(menu, hitem);
227
228	  wattron(menu->win, menu->back);
229	  if (((hitem = hitem->right) != lasthor) && hitem)
230	    {
231	      int i, j, cy, cx;
232	      chtype ch = ' ';
233
234	      getyx(menu->win, cy, cx);
235	      for (j = 0; j < menu->spc_rows; j++)
236		{
237		  wmove(menu->win, cy + j, cx);
238		  for (i = 0; i < menu->spc_cols; i++)
239		    {
240		      waddch(menu->win, ch);
241		    }
242		}
243	      wmove(menu->win, cy, cx + menu->spc_cols);
244	    }
245	}
246      while (hitem && (hitem != lasthor));
247      wattroff(menu->win, menu->back);
248
249      item = item->down;
250      y += menu->spc_rows;
251
252    }
253  while (item && (item != lastvert));
254}
255
256/*---------------------------------------------------------------------------
257|   Facility      :  libnmenu
258|   Function      :  int post_menu(MENU *)
259|
260|   Description   :  Post a menu to the screen. This makes it visible.
261|
262|   Return Values :  E_OK                - success
263|                    E_BAD_ARGUMENT      - not a valid menu pointer
264|                    E_SYSTEM_ERROR      - error in lower layers
265|                    E_NOT_CONNECTED     - No items connected to menu
266|                    E_BAD_STATE         - Menu in userexit routine
267|                    E_POSTED            - Menu already posted
268+--------------------------------------------------------------------------*/
269NCURSES_EXPORT(int)
270post_menu(MENU * menu)
271{
272  T((T_CALLED("post_menu(%p)"), menu));
273
274  if (!menu)
275    RETURN(E_BAD_ARGUMENT);
276
277  if (menu->status & _IN_DRIVER)
278    RETURN(E_BAD_STATE);
279
280  if (menu->status & _POSTED)
281    RETURN(E_POSTED);
282
283  if (menu->items && *(menu->items))
284    {
285      int y;
286      int h = 1 + menu->spc_rows * (menu->rows - 1);
287
288      WINDOW *win = Get_Menu_Window(menu);
289      int maxy = getmaxy(win);
290
291      if ((menu->win = newpad(h, menu->width)))
292	{
293	  y = (maxy >= h) ? h : maxy;
294	  if (y >= menu->height)
295	    y = menu->height;
296	  if (!(menu->sub = subpad(menu->win, y, menu->width, 0, 0)))
297	    RETURN(E_SYSTEM_ERROR);
298	}
299      else
300	RETURN(E_SYSTEM_ERROR);
301
302      if (menu->status & _LINK_NEEDED)
303	_nc_Link_Items(menu);
304    }
305  else
306    RETURN(E_NOT_CONNECTED);
307
308  menu->status |= _POSTED;
309
310  if (!(menu->opt & O_ONEVALUE))
311    {
312      ITEM **items;
313
314      for (items = menu->items; *items; items++)
315	{
316	  (*items)->value = FALSE;
317	}
318    }
319
320  _nc_Draw_Menu(menu);
321
322  Call_Hook(menu, menuinit);
323  Call_Hook(menu, iteminit);
324
325  _nc_Show_Menu(menu);
326
327  RETURN(E_OK);
328}
329
330/*---------------------------------------------------------------------------
331|   Facility      :  libnmenu
332|   Function      :  int unpost_menu(MENU *)
333|
334|   Description   :  Detach menu from screen
335|
336|   Return Values :  E_OK              - success
337|                    E_BAD_ARGUMENT    - not a valid menu pointer
338|                    E_BAD_STATE       - menu in userexit routine
339|                    E_NOT_POSTED      - menu is not posted
340+--------------------------------------------------------------------------*/
341NCURSES_EXPORT(int)
342unpost_menu(MENU * menu)
343{
344  WINDOW *win;
345
346  T((T_CALLED("unpost_menu(%p)"), menu));
347
348  if (!menu)
349    RETURN(E_BAD_ARGUMENT);
350
351  if (menu->status & _IN_DRIVER)
352    RETURN(E_BAD_STATE);
353
354  if (!(menu->status & _POSTED))
355    RETURN(E_NOT_POSTED);
356
357  Call_Hook(menu, itemterm);
358  Call_Hook(menu, menuterm);
359
360  win = Get_Menu_Window(menu);
361  werase(win);
362  wsyncup(win);
363
364  assert(menu->sub);
365  delwin(menu->sub);
366  menu->sub = (WINDOW *)0;
367
368  assert(menu->win);
369  delwin(menu->win);
370  menu->win = (WINDOW *)0;
371
372  menu->status &= ~_POSTED;
373
374  RETURN(E_OK);
375}
376
377/* m_post.c ends here */
378