1 /**************************************************************************** 2 * Copyright (c) 1998-2010,2012 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 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 40 MODULE_ID("$Id: m_post.c,v 1.31 2012/06/09 23:54:35 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 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, (int)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, (int)menu->fore); 83 isfore = TRUE; 84 } 85 waddstr(menu->win, menu->mark); 86 if (isfore) 87 { 88 wattron(menu->win, (int)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, (int)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, (int)menu->grey); 105 isgrey = TRUE; 106 } 107 else 108 { 109 if (item->value || item == menu->curitem) 110 { 111 wattron(menu->win, (int)menu->fore); 112 isfore = TRUE; 113 } 114 else 115 { 116 wattron(menu->win, (int)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, (int)menu->grey); 162 else if (isfore) 163 wattroff(menu->win, (int)menu->fore); 164 wattron(menu->win, (int)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 (void)mvwaddch(menu->win, cy + j, cx - 1, menu->pad); 175 } 176 wmove(menu->win, ncy, ncx); 177 if (!isback) 178 wattroff(menu->win, (int)menu->back); 179 } 180 } 181 182 /* Remove attributes */ 183 if (isfore) 184 wattroff(menu->win, (int)menu->fore); 185 if (isback) 186 wattroff(menu->win, (int)menu->back); 187 if (isgrey) 188 wattroff(menu->win, (int)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 +--------------------------------------------------------------------------*/ 199 NCURSES_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, (int)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, (int)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* 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 +--------------------------------------------------------------------------*/ 269 NCURSES_EXPORT(int) 270 post_menu(MENU * menu) 271 { 272 T((T_CALLED("post_menu(%p)"), (void *)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 SetStatus(menu, _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 +--------------------------------------------------------------------------*/ 341 NCURSES_EXPORT(int) 342 unpost_menu(MENU * menu) 343 { 344 WINDOW *win; 345 346 T((T_CALLED("unpost_menu(%p)"), (void *)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 ClrStatus(menu, _POSTED); 373 374 RETURN(E_OK); 375 } 376 377 /* m_post.c ends here */ 378