1 /* 2 * $Id: rangebox.c,v 1.17 2013/03/17 16:02:00 tom Exp $ 3 * 4 * rangebox.c -- implements the rangebox dialog 5 * 6 * Copyright 2012,2013 Thomas E. Dickey 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU Lesser General Public License, version 2.1 10 * as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this program; if not, write to 19 * Free Software Foundation, Inc. 20 * 51 Franklin St., Fifth Floor 21 * Boston, MA 02110, USA. 22 */ 23 24 #include <dialog.h> 25 #include <dlg_keys.h> 26 27 #define ONE_HIGH 1 28 29 #define MIN_HIGH (ONE_HIGH + 1 + (4 * MARGIN)) 30 #define MIN_WIDE (10 + 2 + (2 * MARGIN)) 31 32 struct _box; 33 34 typedef struct _box { 35 WINDOW *parent; 36 WINDOW *window; 37 int x; 38 int y; 39 int width; 40 int height; 41 int period; 42 int value; 43 } BOX; 44 45 typedef struct { 46 /* window in which the value and slider are drawn */ 47 WINDOW *window; 48 int min_value; 49 int max_value; 50 /* position and width of the numeric field */ 51 int value_x; 52 int value_len; 53 int value_col; 54 /* position and width of the slider field */ 55 int slide_x; 56 int slide_y; 57 int slide_len; 58 /* current value drawn */ 59 int current; 60 /* value to add to make slider move by one cell */ 61 int slide_inc; 62 } VALUE; 63 64 static int 65 digits_of(int value) 66 { 67 char temp[80]; 68 sprintf(temp, "%d", value); 69 return (int) strlen(temp); 70 } 71 72 static int 73 digit_of(VALUE * data) 74 { 75 int col = data->value_col; 76 int result = 1; 77 78 while (++col < data->value_len) { 79 result *= 10; 80 } 81 return result; 82 } 83 84 static bool 85 set_digit(VALUE * data, int chr) 86 { 87 bool result = FALSE; 88 char buffer[80]; 89 long check; 90 char *next = 0; 91 92 sprintf(buffer, "%*d", data->value_len, data->current); 93 buffer[data->value_col] = (char) chr; 94 check = strtol(buffer, &next, 10); 95 if (next == 0 || *next == '\0') { 96 if ((check <= (long) data->max_value) && 97 (check >= (long) data->min_value)) { 98 result = TRUE; 99 data->current = (int) check; 100 } 101 } 102 103 return result; 104 } 105 106 /* 107 * This is similar to the gauge code, but differs in the way the number 108 * is displayed, etc. 109 */ 110 static void 111 draw_value(VALUE * data, int value) 112 { 113 if (value != data->current) { 114 WINDOW *win = data->window; 115 int y, x; 116 int n; 117 int ranges = (data->max_value + 1 - data->min_value); 118 int offset = (value - data->min_value); 119 int scaled; 120 121 getyx(win, y, x); 122 123 if (ranges > data->slide_len) { 124 scaled = (offset + data->slide_inc) / data->slide_inc; 125 } else if (ranges < data->slide_len) { 126 scaled = (offset + 1) * data->slide_inc; 127 } else { 128 scaled = offset; 129 } 130 131 (void) wattrset(win, gauge_attr); 132 wmove(win, data->slide_y, data->slide_x); 133 for (n = 0; n < data->slide_len; ++n) { 134 (void) waddch(win, ' '); 135 } 136 wmove(win, data->slide_y, data->value_x); 137 wprintw(win, "%*d", data->value_len, value); 138 if ((gauge_attr & A_REVERSE) != 0) { 139 wattroff(win, A_REVERSE); 140 } else { 141 (void) wattrset(win, A_REVERSE); 142 } 143 wmove(win, data->slide_y, data->slide_x); 144 for (n = 0; n < scaled; ++n) { 145 chtype ch2 = winch(win); 146 if (gauge_attr & A_REVERSE) { 147 ch2 &= ~A_REVERSE; 148 } 149 (void) waddch(win, ch2); 150 } 151 (void) wattrset(win, dialog_attr); 152 153 wmove(win, y, x); 154 data->current = value; 155 156 dlg_trace_msg("drew %d offset %d scaled %d limit %d inc %d\n", 157 value, 158 offset, 159 scaled, 160 data->slide_len, 161 data->slide_inc); 162 163 dlg_trace_win(win); 164 } 165 } 166 167 /* 168 * Allow the user to select from a range of values, e.g., using a slider. 169 */ 170 int 171 dialog_rangebox(const char *title, 172 const char *cprompt, 173 int height, 174 int width, 175 int min_value, 176 int max_value, 177 int default_value) 178 { 179 /* *INDENT-OFF* */ 180 static DLG_KEYS_BINDING binding[] = { 181 DLG_KEYS_DATA( DLGK_DELETE_RIGHT,KEY_DC ), 182 HELPKEY_BINDINGS, 183 ENTERKEY_BINDINGS, 184 DLG_KEYS_DATA( DLGK_ENTER, ' ' ), 185 DLG_KEYS_DATA( DLGK_FIELD_NEXT, CHR_NEXT ), 186 DLG_KEYS_DATA( DLGK_FIELD_NEXT, KEY_RIGHT ), 187 DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ), 188 DLG_KEYS_DATA( DLGK_FIELD_PREV, CHR_BACKSPACE ), 189 DLG_KEYS_DATA( DLGK_FIELD_PREV, CHR_PREVIOUS ), 190 DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ), 191 DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_LEFT ), 192 DLG_KEYS_DATA( DLGK_ITEM_FIRST, KEY_HOME), 193 DLG_KEYS_DATA( DLGK_ITEM_LAST, KEY_END), 194 DLG_KEYS_DATA( DLGK_ITEM_LAST, KEY_LL ), 195 DLG_KEYS_DATA( DLGK_ITEM_NEXT, '+'), 196 DLG_KEYS_DATA( DLGK_ITEM_NEXT, KEY_DOWN), 197 DLG_KEYS_DATA( DLGK_ITEM_PREV, '-' ), 198 DLG_KEYS_DATA( DLGK_ITEM_PREV, KEY_UP ), 199 DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NEXT), 200 DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE), 201 DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ), 202 DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PREVIOUS ), 203 END_KEYS_BINDING 204 }; 205 /* *INDENT-ON* */ 206 207 #ifdef KEY_RESIZE 208 int old_height = height; 209 int old_width = width; 210 #endif 211 VALUE data; 212 int key = 0, key2, fkey; 213 int button; 214 int result = DLG_EXIT_UNKNOWN; 215 WINDOW *dialog; 216 int state = dlg_default_button(); 217 const char **buttons = dlg_ok_labels(); 218 char *prompt = dlg_strclone(cprompt); 219 char buffer[MAX_LEN]; 220 int cur_value = default_value; 221 int usable; 222 int ranges; 223 int yorg, xorg; 224 225 if (max_value < min_value) 226 max_value = min_value; 227 if (cur_value > max_value) 228 cur_value = max_value; 229 if (cur_value < min_value) 230 cur_value = min_value; 231 232 dlg_does_output(); 233 234 #ifdef KEY_RESIZE 235 retry: 236 #endif 237 238 dlg_auto_size(title, prompt, &height, &width, 0, 0); 239 height += MIN_HIGH; 240 if (width < MIN_WIDE) 241 width = MIN_WIDE; 242 dlg_button_layout(buttons, &width); 243 dlg_print_size(height, width); 244 dlg_ctl_size(height, width); 245 246 dialog = dlg_new_window(height, width, 247 yorg = dlg_box_y_ordinate(height), 248 xorg = dlg_box_x_ordinate(width)); 249 250 data.window = dialog; 251 252 data.min_value = min_value; 253 data.max_value = max_value; 254 255 usable = (width - 2 - 4 * MARGIN); 256 ranges = max_value - min_value + 1; 257 258 /* 259 * Center the number after allowing for its maximum number of digits. 260 */ 261 data.value_len = digits_of(max_value); 262 if (digits_of(min_value) > data.value_len) 263 data.value_len = digits_of(min_value); 264 data.value_x = (usable - data.value_len) / 2 + MARGIN; 265 data.value_col = data.value_len - 1; 266 267 /* 268 * The slider is scaled, to try to use the width of the dialog. 269 */ 270 if (ranges > usable) { 271 data.slide_inc = (ranges + usable - 1) / usable; 272 data.slide_len = 1 + ranges / data.slide_inc; 273 } else if (ranges < usable) { 274 data.slide_inc = usable / ranges; 275 data.slide_len = ranges * data.slide_inc; 276 } else { 277 data.slide_inc = 1; 278 data.slide_len = usable; 279 } 280 data.slide_x = (usable - data.slide_len) / 2 + MARGIN + 2; 281 data.slide_y = height - 5; 282 283 data.current = cur_value - 1; 284 285 dlg_register_window(dialog, "rangebox", binding); 286 dlg_register_buttons(dialog, "rangebox", buttons); 287 288 dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr); 289 dlg_mouse_setbase(xorg, yorg); 290 dlg_mouse_mkregion(data.slide_y - 1, data.slide_x - 1, 3, usable + 2, 'i'); 291 dlg_draw_box2(dialog, 292 height - 6, data.slide_x - MARGIN, 293 2 + MARGIN, data.slide_len + 2 * MARGIN, 294 dialog_attr, 295 border_attr, 296 border2_attr); 297 dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr); 298 dlg_draw_title(dialog, title); 299 dlg_draw_helpline(dialog, FALSE); 300 301 (void) wattrset(dialog, dialog_attr); 302 dlg_print_autowrap(dialog, prompt, height, width); 303 304 dlg_trace_win(dialog); 305 while (result == DLG_EXIT_UNKNOWN) { 306 draw_value(&data, cur_value); 307 button = (state < 0) ? 0 : state; 308 dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width); 309 if (state < 0) { 310 data.value_col = data.value_len + state; 311 wmove(dialog, data.slide_y, data.value_x + data.value_col); 312 } 313 314 key = dlg_mouse_wgetch(dialog, &fkey); 315 if (dlg_result_key(key, fkey, &result)) 316 break; 317 318 if ((key2 = dlg_char_to_button(key, buttons)) >= 0) { 319 result = key2; 320 } else { 321 /* handle function-keys */ 322 if (fkey) { 323 switch (key) { 324 case DLGK_ENTER: 325 result = dlg_ok_buttoncode(button); 326 break; 327 case DLGK_FIELD_PREV: 328 if (state < 0 && state > -data.value_len) { 329 --state; 330 } else { 331 state = dlg_prev_ok_buttonindex(state, -data.value_len); 332 } 333 break; 334 case DLGK_FIELD_NEXT: 335 if (state < 0) { 336 ++state; 337 } else { 338 state = dlg_next_ok_buttonindex(state, -data.value_len); 339 } 340 break; 341 case DLGK_ITEM_FIRST: 342 cur_value = min_value; 343 break; 344 case DLGK_ITEM_LAST: 345 cur_value = max_value; 346 break; 347 case DLGK_ITEM_PREV: 348 if (state < 0) { 349 cur_value -= digit_of(&data); 350 } else { 351 cur_value -= 1; 352 } 353 if (cur_value < min_value) 354 cur_value = min_value; 355 break; 356 case DLGK_ITEM_NEXT: 357 if (state < 0) { 358 cur_value += digit_of(&data); 359 } else { 360 cur_value += 1; 361 } 362 if (cur_value > max_value) 363 cur_value = max_value; 364 break; 365 case DLGK_PAGE_PREV: 366 cur_value -= data.slide_inc; 367 if (cur_value < min_value) 368 cur_value = min_value; 369 break; 370 case DLGK_PAGE_NEXT: 371 cur_value += data.slide_inc; 372 if (cur_value > max_value) 373 cur_value = max_value; 374 break; 375 #ifdef KEY_RESIZE 376 case KEY_RESIZE: 377 /* reset data */ 378 height = old_height; 379 width = old_width; 380 /* repaint */ 381 dlg_clear(); 382 dlg_del_window(dialog); 383 refresh(); 384 dlg_mouse_free_regions(); 385 goto retry; 386 #endif 387 case DLGK_MOUSE('i'): 388 state = -data.value_len; 389 break; 390 default: 391 if (is_DLGK_MOUSE(key)) { 392 result = dlg_ok_buttoncode(key - M_EVENT); 393 if (result < 0) 394 result = DLG_EXIT_OK; 395 } 396 break; 397 } 398 } else if (isdigit(key) && state < 0) { 399 if (set_digit(&data, key)) { 400 cur_value = data.current; 401 data.current--; 402 } 403 } else { 404 beep(); 405 } 406 } 407 } 408 409 sprintf(buffer, "%d", cur_value); 410 dlg_add_result(buffer); 411 dlg_add_separator(); 412 dlg_add_last_key(-1); 413 414 dlg_del_window(dialog); 415 dlg_mouse_free_regions(); 416 free(prompt); 417 418 return result; 419 } 420