1 /**************************************************************************** 2 * Copyright (c) 1998 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 <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 1.16 1999/05/16 17:27:38 juergen 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 void _nc_Post_Item(const MENU * menu, const ITEM * item) 52 { 53 int i; 54 chtype ch; 55 int item_x, item_y; 56 int count = 0; 57 bool isfore = FALSE, isback=FALSE, isgrey = FALSE; 58 59 assert(menu->win); 60 61 getyx(menu->win,item_y,item_x); 62 63 /* We need a marker iff 64 - it is a onevalued menu and it is the current item 65 - or it has a selection value 66 */ 67 wattron(menu->win,menu->back); 68 if (item->value || (item==menu->curitem)) 69 { 70 if (menu->marklen) 71 { 72 /* In a multi selection menu we use the fore attribute 73 for a selected marker that is not the current one. 74 This improves visualization of the menu, because now 75 always the 'normal' marker denotes the current 76 item. */ 77 if (!(menu->opt & O_ONEVALUE) && item->value && item!=menu->curitem) 78 { 79 wattron(menu->win,menu->fore); 80 isfore = TRUE; 81 } 82 waddstr(menu->win,menu->mark); 83 if (isfore) 84 { 85 wattron(menu->win,menu->fore); 86 isfore = FALSE; 87 } 88 } 89 } 90 else /* otherwise we have to wipe out the marker area */ 91 for(ch=' ',i=menu->marklen;i>0;i--) 92 waddch(menu->win,ch); 93 wattroff(menu->win,menu->back); 94 count += menu->marklen; 95 96 /* First we have to calculate the attribute depending on selectability 97 and selection status 98 */ 99 if (!(item->opt & O_SELECTABLE)) 100 { 101 wattron(menu->win,menu->grey); 102 isgrey = TRUE; 103 } 104 else 105 { 106 if (item->value || item==menu->curitem) 107 { 108 wattron(menu->win,menu->fore); 109 isfore = TRUE; 110 } 111 else 112 { 113 wattron(menu->win,menu->back); 114 isback = TRUE; 115 } 116 } 117 118 waddnstr(menu->win,item->name.str,item->name.length); 119 for(ch=' ',i=menu->namelen-item->name.length;i>0;i--) 120 { 121 waddch(menu->win,ch); 122 } 123 count += menu->namelen; 124 125 /* Show description if required and available */ 126 if ( (menu->opt & O_SHOWDESC) && menu->desclen>0 ) 127 { 128 int m = menu->spc_desc/2; 129 int cy = -1, cx = -1; 130 131 for(ch=' ',i=0; i < menu->spc_desc; i++) 132 { 133 if (i==m) 134 { 135 waddch(menu->win,menu->pad); 136 getyx(menu->win,cy,cx); 137 } 138 else 139 waddch(menu->win,ch); 140 } 141 if (item->description.length) 142 waddnstr(menu->win,item->description.str,item->description.length); 143 for(ch=' ',i=menu->desclen-item->description.length; i>0; i--) 144 { 145 waddch(menu->win,ch); 146 } 147 count += menu->desclen + menu->spc_desc; 148 149 if (menu->spc_rows > 1) 150 { 151 int j, k, ncy, ncx; 152 153 assert(cx>=0 && cy>=0); 154 getyx(menu->win,ncy,ncx); 155 if (isgrey) wattroff(menu->win,menu->grey); 156 else if (isfore) wattroff(menu->win,menu->fore); 157 wattron(menu->win,menu->back); 158 for(j=1; j < menu->spc_rows;j++) 159 { 160 if ((item_y+j) < getmaxy(menu->win)) 161 { 162 wmove (menu->win,item_y+j,item_x); 163 for(k=0;k<count;k++) 164 waddch(menu->win,' '); 165 } 166 if ((cy+j) < getmaxy(menu->win)) 167 mvwaddch(menu->win,cy+j,cx-1,menu->pad); 168 } 169 wmove(menu->win,ncy,ncx); 170 if (!isback) 171 wattroff(menu->win,menu->back); 172 } 173 } 174 175 /* Remove attributes */ 176 if (isfore) 177 wattroff(menu->win,menu->fore); 178 if (isback) 179 wattroff(menu->win,menu->back); 180 if (isgrey) 181 wattroff(menu->win,menu->grey); 182 } 183 184 /*--------------------------------------------------------------------------- 185 | Facility : libnmenu 186 | Function : void _nc_Draw_Menu(const MENU *) 187 | 188 | Description : Display the menu in its windows 189 | 190 | Return Values : - 191 +--------------------------------------------------------------------------*/ 192 void _nc_Draw_Menu(const MENU * menu) 193 { 194 ITEM *item = menu->items[0]; 195 ITEM *lasthor, *lastvert; 196 ITEM *hitem; 197 int y = 0; 198 chtype s_bkgd; 199 200 assert(item && menu->win); 201 202 s_bkgd = getbkgd(menu->win); 203 wbkgdset(menu->win,menu->back); 204 werase(menu->win); 205 wbkgdset(menu->win,s_bkgd); 206 207 lastvert = (menu->opt & O_NONCYCLIC) ? (ITEM *)0 : item; 208 209 do 210 { 211 wmove(menu->win,y,0); 212 213 hitem = item; 214 lasthor = (menu->opt & O_NONCYCLIC) ? (ITEM *)0 : hitem; 215 216 do 217 { 218 _nc_Post_Item( menu, hitem); 219 220 wattron(menu->win,menu->back); 221 if ( ((hitem = hitem->right) != lasthor) && hitem ) 222 { 223 int i,j, cy, cx; 224 chtype ch = ' '; 225 226 getyx(menu->win,cy,cx); 227 for(j=0;j<menu->spc_rows;j++) 228 { 229 wmove(menu->win,cy+j,cx); 230 for(i=0; i < menu->spc_cols; i++) 231 { 232 waddch( menu->win,ch); 233 } 234 } 235 wmove(menu->win,cy,cx+menu->spc_cols); 236 } 237 } while (hitem && (hitem != lasthor)); 238 wattroff(menu->win,menu->back); 239 240 item = item->down; 241 y += menu->spc_rows; 242 243 } while( item && (item != lastvert) ); 244 } 245 246 /*--------------------------------------------------------------------------- 247 | Facility : libnmenu 248 | Function : int post_menu(MENU *) 249 | 250 | Description : Post a menu to the screen. This makes it visible. 251 | 252 | Return Values : E_OK - success 253 | E_BAD_ARGUMENT - not a valid menu pointer 254 | E_SYSTEM_ERROR - error in lower layers 255 | E_NO_ROOM - Menu to large for screen 256 | E_NOT_CONNECTED - No items connected to menu 257 | E_BAD_STATE - Menu in userexit routine 258 | E_POSTED - Menu already posted 259 +--------------------------------------------------------------------------*/ 260 int post_menu(MENU * menu) 261 { 262 if (!menu) 263 RETURN(E_BAD_ARGUMENT); 264 265 if ( menu->status & _IN_DRIVER ) 266 RETURN(E_BAD_STATE); 267 268 if ( menu->status & _POSTED ) 269 RETURN(E_POSTED); 270 271 if (menu->items && *(menu->items)) 272 { 273 int y; 274 int h = 1 + menu->spc_rows * (menu->rows - 1); 275 276 WINDOW *win = Get_Menu_Window(menu); 277 int maxy = getmaxy(win); 278 int maxx = getmaxx(win); 279 280 if (maxx < menu->width || maxy < menu->height) 281 RETURN(E_NO_ROOM); 282 283 if ( (menu->win = newpad(h,menu->width)) ) 284 { 285 y = (maxy >= h) ? h : maxy; 286 if (y>=menu->height) 287 y = menu->height; 288 if(!(menu->sub = subpad(menu->win,y,menu->width,0,0))) 289 RETURN(E_SYSTEM_ERROR); 290 } 291 else 292 RETURN(E_SYSTEM_ERROR); 293 294 if (menu->status & _LINK_NEEDED) 295 _nc_Link_Items(menu); 296 } 297 else 298 RETURN(E_NOT_CONNECTED); 299 300 menu->status |= _POSTED; 301 302 if (!(menu->opt&O_ONEVALUE)) 303 { 304 ITEM **items; 305 306 for(items=menu->items;*items;items++) 307 { 308 (*items)->value = FALSE; 309 } 310 } 311 312 _nc_Draw_Menu(menu); 313 314 Call_Hook(menu,menuinit); 315 Call_Hook(menu,iteminit); 316 317 _nc_Show_Menu(menu); 318 319 RETURN(E_OK); 320 } 321 322 /*--------------------------------------------------------------------------- 323 | Facility : libnmenu 324 | Function : int unpost_menu(MENU *) 325 | 326 | Description : Detach menu from screen 327 | 328 | Return Values : E_OK - success 329 | E_BAD_ARGUMENT - not a valid menu pointer 330 | E_BAD_STATE - menu in userexit routine 331 | E_NOT_POSTED - menu is not posted 332 +--------------------------------------------------------------------------*/ 333 int unpost_menu(MENU * menu) 334 { 335 WINDOW *win; 336 337 if (!menu) 338 RETURN(E_BAD_ARGUMENT); 339 340 if ( menu->status & _IN_DRIVER ) 341 RETURN(E_BAD_STATE); 342 343 if ( !( menu->status & _POSTED ) ) 344 RETURN(E_NOT_POSTED); 345 346 Call_Hook(menu,itemterm); 347 Call_Hook(menu,menuterm); 348 349 win = Get_Menu_Window(menu); 350 werase(win); 351 wsyncup(win); 352 353 assert(menu->sub); 354 delwin(menu->sub); 355 menu->sub = (WINDOW *)0; 356 357 assert(menu->win); 358 delwin(menu->win); 359 menu->win = (WINDOW *)0; 360 361 menu->status &= ~_POSTED; 362 363 RETURN(E_OK); 364 } 365 366 /* m_post.c ends here */ 367