xref: /freebsd/contrib/ncurses/menu/m_post.c (revision 87569f75a91f298c52a71823c04d41cf53c88889) 
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28 
29 /****************************************************************************
30  *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 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 
40 MODULE_ID("$Id: m_post.c,v 1.17 2000/12/10 02:16:48 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 +--------------------------------------------------------------------------*/
51 NCURSES_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 
60   assert(menu->win);
61 
62   getyx(menu->win,item_y,item_x);
63 
64   /* We need a marker iff
65      - it is a onevalued menu and it is the current item
66      - or it has a selection value
67      */
68   wattron(menu->win,menu->back);
69   if (item->value || (item==menu->curitem))
70     {
71       if (menu->marklen)
72 	{
73 	  /* In a multi selection menu we use the fore attribute
74 	     for a selected marker that is not the current one.
75 	     This improves visualization of the menu, because now
76 	     always the 'normal' marker denotes the current
77 	     item. */
78 	  if (!(menu->opt & O_ONEVALUE) && item->value && item!=menu->curitem)
79 	    {
80 	      wattron(menu->win,menu->fore);
81 	      isfore = TRUE;
82 	    }
83 	  waddstr(menu->win,menu->mark);
84 	  if (isfore)
85 	    {
86 	      wattron(menu->win,menu->fore);
87 	      isfore = FALSE;
88 	    }
89 	}
90     }
91   else			/* otherwise we have to wipe out the marker area */
92     for(ch=' ',i=menu->marklen;i>0;i--)
93       waddch(menu->win,ch);
94   wattroff(menu->win,menu->back);
95   count += menu->marklen;
96 
97   /* First we have to calculate the attribute depending on selectability
98      and selection status
99      */
100   if (!(item->opt & O_SELECTABLE))
101     {
102       wattron(menu->win,menu->grey);
103       isgrey = TRUE;
104     }
105   else
106     {
107       if (item->value || item==menu->curitem)
108 	{
109 	  wattron(menu->win,menu->fore);
110 	  isfore = TRUE;
111 	}
112       else
113 	{
114 	  wattron(menu->win,menu->back);
115 	  isback = TRUE;
116 	}
117     }
118 
119   waddnstr(menu->win,item->name.str,item->name.length);
120   for(ch=' ',i=menu->namelen-item->name.length;i>0;i--)
121     {
122       waddch(menu->win,ch);
123     }
124   count += menu->namelen;
125 
126   /* Show description if required and available */
127   if ( (menu->opt & O_SHOWDESC) && menu->desclen>0 )
128     {
129       int m = menu->spc_desc/2;
130       int cy = -1, cx = -1;
131 
132       for(ch=' ',i=0; i < menu->spc_desc; i++)
133 	{
134 	  if (i==m)
135 	    {
136 	      waddch(menu->win,menu->pad);
137 	      getyx(menu->win,cy,cx);
138 	    }
139 	  else
140 	    waddch(menu->win,ch);
141 	}
142       if (item->description.length)
143 	waddnstr(menu->win,item->description.str,item->description.length);
144       for(ch=' ',i=menu->desclen-item->description.length; i>0; i--)
145 	{
146 	  waddch(menu->win,ch);
147 	}
148       count += menu->desclen + menu->spc_desc;
149 
150       if (menu->spc_rows > 1)
151 	{
152 	  int j, k, ncy, ncx;
153 
154 	  assert(cx>=0 && cy>=0);
155 	  getyx(menu->win,ncy,ncx);
156 	  if (isgrey) wattroff(menu->win,menu->grey);
157 	  else if (isfore) wattroff(menu->win,menu->fore);
158 	  wattron(menu->win,menu->back);
159 	  for(j=1; j < menu->spc_rows;j++)
160 	    {
161 	      if ((item_y+j) < getmaxy(menu->win))
162 		{
163 		  wmove (menu->win,item_y+j,item_x);
164 		  for(k=0;k<count;k++)
165 		    waddch(menu->win,' ');
166 		}
167 	      if ((cy+j) < getmaxy(menu->win))
168 		mvwaddch(menu->win,cy+j,cx-1,menu->pad);
169 	    }
170 	  wmove(menu->win,ncy,ncx);
171 	  if (!isback)
172 	    wattroff(menu->win,menu->back);
173 	}
174     }
175 
176   /* Remove attributes */
177   if (isfore)
178     wattroff(menu->win,menu->fore);
179   if (isback)
180     wattroff(menu->win,menu->back);
181   if (isgrey)
182     wattroff(menu->win,menu->grey);
183 }
184 
185 /*---------------------------------------------------------------------------
186 |   Facility      :  libnmenu
187 |   Function      :  void _nc_Draw_Menu(const MENU *)
188 |
189 |   Description   :  Display the menu in its windows
190 |
191 |   Return Values :  -
192 +--------------------------------------------------------------------------*/
193 NCURSES_EXPORT(void)
194 _nc_Draw_Menu (const MENU * menu)
195 {
196   ITEM *item = menu->items[0];
197   ITEM *lasthor, *lastvert;
198   ITEM *hitem;
199   int y = 0;
200   chtype s_bkgd;
201 
202   assert(item && menu->win);
203 
204   s_bkgd = getbkgd(menu->win);
205   wbkgdset(menu->win,menu->back);
206   werase(menu->win);
207   wbkgdset(menu->win,s_bkgd);
208 
209   lastvert = (menu->opt & O_NONCYCLIC) ? (ITEM *)0 : item;
210 
211   do
212     {
213       wmove(menu->win,y,0);
214 
215       hitem   = item;
216       lasthor = (menu->opt & O_NONCYCLIC) ? (ITEM *)0 : hitem;
217 
218       do
219 	{
220 	  _nc_Post_Item( menu, hitem);
221 
222 	  wattron(menu->win,menu->back);
223 	  if ( ((hitem = hitem->right) != lasthor) && hitem )
224 	    {
225 	      int i,j, cy, cx;
226 	      chtype ch = ' ';
227 
228 	      getyx(menu->win,cy,cx);
229 	      for(j=0;j<menu->spc_rows;j++)
230 		{
231 		  wmove(menu->win,cy+j,cx);
232 		  for(i=0; i < menu->spc_cols; i++)
233 		    {
234 		      waddch( menu->win,ch);
235 		    }
236 		}
237 	      wmove(menu->win,cy,cx+menu->spc_cols);
238 	    }
239 	} while (hitem && (hitem != lasthor));
240       wattroff(menu->win,menu->back);
241 
242       item = item->down;
243       y += menu->spc_rows;
244 
245     } while( item && (item != lastvert) );
246 }
247 
248 /*---------------------------------------------------------------------------
249 |   Facility      :  libnmenu
250 |   Function      :  int post_menu(MENU *)
251 |
252 |   Description   :  Post a menu to the screen. This makes it visible.
253 |
254 |   Return Values :  E_OK                - success
255 |                    E_BAD_ARGUMENT      - not a valid menu pointer
256 |                    E_SYSTEM_ERROR      - error in lower layers
257 |                    E_NO_ROOM           - Menu to large for screen
258 |                    E_NOT_CONNECTED     - No items connected to menu
259 |                    E_BAD_STATE         - Menu in userexit routine
260 |                    E_POSTED            - Menu already posted
261 +--------------------------------------------------------------------------*/
262 NCURSES_EXPORT(int)
263 post_menu (MENU * menu)
264 {
265   if (!menu)
266     RETURN(E_BAD_ARGUMENT);
267 
268   if ( menu->status & _IN_DRIVER )
269     RETURN(E_BAD_STATE);
270 
271   if ( menu->status & _POSTED )
272     RETURN(E_POSTED);
273 
274   if (menu->items && *(menu->items))
275     {
276       int y;
277       int h = 1 + menu->spc_rows * (menu->rows - 1);
278 
279       WINDOW *win = Get_Menu_Window(menu);
280       int maxy = getmaxy(win);
281       int maxx = getmaxx(win);
282 
283       if (maxx < menu->width || maxy < menu->height)
284 	RETURN(E_NO_ROOM);
285 
286       if ( (menu->win = newpad(h,menu->width)) )
287 	{
288 	  y = (maxy >= h) ? h : maxy;
289 	  if (y>=menu->height)
290 	    y = menu->height;
291 	  if(!(menu->sub = subpad(menu->win,y,menu->width,0,0)))
292 	    RETURN(E_SYSTEM_ERROR);
293 	}
294       else
295 	RETURN(E_SYSTEM_ERROR);
296 
297       if (menu->status & _LINK_NEEDED)
298 	_nc_Link_Items(menu);
299     }
300   else
301     RETURN(E_NOT_CONNECTED);
302 
303   menu->status |= _POSTED;
304 
305   if (!(menu->opt&O_ONEVALUE))
306     {
307       ITEM **items;
308 
309       for(items=menu->items;*items;items++)
310 	{
311 	  (*items)->value = FALSE;
312 	}
313     }
314 
315   _nc_Draw_Menu(menu);
316 
317   Call_Hook(menu,menuinit);
318   Call_Hook(menu,iteminit);
319 
320   _nc_Show_Menu(menu);
321 
322   RETURN(E_OK);
323 }
324 
325 /*---------------------------------------------------------------------------
326 |   Facility      :  libnmenu
327 |   Function      :  int unpost_menu(MENU *)
328 |
329 |   Description   :  Detach menu from screen
330 |
331 |   Return Values :  E_OK              - success
332 |                    E_BAD_ARGUMENT    - not a valid menu pointer
333 |                    E_BAD_STATE       - menu in userexit routine
334 |                    E_NOT_POSTED      - menu is not posted
335 +--------------------------------------------------------------------------*/
336 NCURSES_EXPORT(int)
337 unpost_menu (MENU * menu)
338 {
339   WINDOW *win;
340 
341   if (!menu)
342     RETURN(E_BAD_ARGUMENT);
343 
344   if ( menu->status & _IN_DRIVER )
345     RETURN(E_BAD_STATE);
346 
347   if ( !( menu->status & _POSTED ) )
348     RETURN(E_NOT_POSTED);
349 
350   Call_Hook(menu,itemterm);
351   Call_Hook(menu,menuterm);
352 
353   win = Get_Menu_Window(menu);
354   werase(win);
355   wsyncup(win);
356 
357   assert(menu->sub);
358   delwin(menu->sub);
359   menu->sub = (WINDOW *)0;
360 
361   assert(menu->win);
362   delwin(menu->win);
363   menu->win = (WINDOW *)0;
364 
365   menu->status &= ~_POSTED;
366 
367   RETURN(E_OK);
368 }
369 
370 /* m_post.c ends here */
371