/* * checklist.c -- implements the checklist box * * AUTHOR: Savio Lam (lam836@cs.cuhk.hk) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "dialog.h" static void print_item(WINDOW *win, char *tag, char *item, int status, int choice, int selected); static int list_width, check_x, item_x; /* * Display a dialog box with a list of options that can be turned on or off */ int dialog_checklist(char *title, char *prompt, int height, int width, int list_height, int item_no, char **items) { int i, x, y, cur_x, cur_y, box_x, box_y, key = 0, button = 0, choice = 0, scrolli = 0, max_choice, *status; WINDOW *dialog, *list; /* Allocate space for storing item on/off status */ if ((status = malloc(sizeof(int)*item_no)) == NULL) { endwin(); fprintf(stderr, "\nCan't allocate memory in dialog_checklist().\n"); exit(-1); } /* Initializes status */ for (i = 0; i < item_no; i++) status[i] = !strcasecmp(items[i*3 + 2], "on"); max_choice = MIN(list_height, item_no); /* center dialog box on screen */ x = (COLS - width)/2; y = (LINES - height)/2; #ifdef HAVE_NCURSES if (use_shadow) draw_shadow(stdscr, y, x, height, width); #endif dialog = newwin(height, width, y, x); keypad(dialog, TRUE); draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr); wattrset(dialog, border_attr); wmove(dialog, height-3, 0); waddch(dialog, ACS_LTEE); for (i = 0; i < width-2; i++) waddch(dialog, ACS_HLINE); wattrset(dialog, dialog_attr); waddch(dialog, ACS_RTEE); wmove(dialog, height-2, 1); for (i = 0; i < width-2; i++) waddch(dialog, ' '); if (title != NULL) { wattrset(dialog, title_attr); wmove(dialog, 0, (width - strlen(title))/2 - 1); waddch(dialog, ' '); waddstr(dialog, title); waddch(dialog, ' '); } wattrset(dialog, dialog_attr); print_autowrap(dialog, prompt, width, 1, 3); list_width = width-6; getyx(dialog, cur_y, cur_x); box_y = cur_y + 1; box_x = (width - list_width)/2 - 1; /* create new window for the list */ list = subwin(dialog, list_height, list_width, y + box_y + 1, x + box_x + 1); keypad(list, TRUE); /* draw a box around the list items */ draw_box(dialog, box_y, box_x, list_height+2, list_width+2, menubox_border_attr, menubox_attr); check_x = 0; item_x = 0; /* Find length of longest item in order to center checklist */ for (i = 0; i < item_no; i++) { check_x = MAX(check_x, strlen(items[i*3]) + strlen(items[i*3 + 1]) + 6); item_x = MAX(item_x, strlen(items[i*3])); } check_x = (list_width - check_x) / 2; item_x = check_x + item_x + 6; /* Print the list */ for (i = 0; i < max_choice; i++) print_item(list, items[i*3], items[i*3 + 1], status[i], i, i == choice); wnoutrefresh(list); if (list_height < item_no) { wattrset(dialog, darrow_attr); wmove(dialog, box_y + list_height + 1, box_x + check_x + 5); waddch(dialog, ACS_DARROW); wmove(dialog, box_y + list_height + 1, box_x + check_x + 6); waddstr(dialog, "(+)"); } x = width/2-11; y = height-2; print_button(dialog, "Cancel", y, x+14, FALSE); print_button(dialog, " OK ", y, x, TRUE); wrefresh(dialog); while (key != ESC) { key = wgetch(dialog); /* Check if key pressed matches first character of any item tag in list */ for (i = 0; i < max_choice; i++) if (toupper(key) == toupper(items[(scrolli+i)*3][0])) break; if (i < max_choice || (key >= '1' && key <= MIN('9', '0'+max_choice)) || key == KEY_UP || key == KEY_DOWN || key == ' ' || key == '+' || key == '-' ) { if (key >= '1' && key <= MIN('9', '0'+max_choice)) i = key - '1'; else if (key == KEY_UP || key == '-') { if (!choice) { if (scrolli) { #ifdef BROKEN_WSCRL /* wscrl() in ncurses 1.8.1 seems to be broken, causing a segmentation violation when scrolling windows of height = 4, so scrolling is not used for now */ scrolli--; getyx(dialog, cur_y, cur_x); /* Save cursor position */ /* Reprint list to scroll down */ for (i = 0; i < max_choice; i++) print_item(list, items[(scrolli+i)*3], items[(scrolli+i)*3 + 1], status[scrolli+i], i, i == choice); #else /* Scroll list down */ getyx(dialog, cur_y, cur_x); /* Save cursor position */ if (list_height > 1) { /* De-highlight current first item before scrolling down */ print_item(list, items[scrolli*3], items[scrolli*3 + 1], status[scrolli], 0, FALSE); scrollok(list, TRUE); wscrl(list, -1); scrollok(list, FALSE); } scrolli--; print_item(list, items[scrolli*3], items[scrolli*3 + 1], status[scrolli], 0, TRUE); #endif wnoutrefresh(list); /* print the up/down arrows */ wmove(dialog, box_y, box_x + check_x + 5); wattrset(dialog, scrolli ? uarrow_attr : menubox_attr); waddch(dialog, scrolli ? ACS_UARROW : ACS_HLINE); wmove(dialog, box_y, box_x + check_x + 6); waddch(dialog, scrolli ? '(' : ACS_HLINE); wmove(dialog, box_y, box_x + check_x + 7); waddch(dialog, scrolli ? '-' : ACS_HLINE); wmove(dialog, box_y, box_x + check_x + 8); waddch(dialog, scrolli ? ')' : ACS_HLINE); wattrset(dialog, darrow_attr); wmove(dialog, box_y + list_height + 1, box_x + check_x + 5); waddch(dialog, ACS_DARROW); wmove(dialog, box_y + list_height + 1, box_x + check_x + 6); waddch(dialog, '('); wmove(dialog, box_y + list_height + 1, box_x + check_x + 7); waddch(dialog, '+'); wmove(dialog, box_y + list_height + 1, box_x + check_x + 8); waddch(dialog, ')'); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); } continue; /* wait for another key press */ } else i = choice - 1; } else if (key == KEY_DOWN || key == '+') { if (choice == max_choice - 1) { if (scrolli+choice < item_no-1) { #ifdef BROKEN_WSCRL /* wscrl() in ncurses 1.8.1 seems to be broken, causing a segmentation violation when scrolling windows of height = 4, so scrolling is not used for now */ scrolli++; getyx(dialog, cur_y, cur_x); /* Save cursor position */ /* Reprint list to scroll up */ for (i = 0; i < max_choice; i++) print_item(list, items[(scrolli+i)*3], items[(scrolli+i)*3 + 1], status[scrolli+i], i, i == choice); #else /* Scroll list up */ getyx(dialog, cur_y, cur_x); /* Save cursor position */ if (list_height > 1) { /* De-highlight current last item before scrolling up */ print_item(list, items[(scrolli+max_choice-1)*3], items[(scrolli+max_choice-1)*3 + 1], status[scrolli+max_choice-1], max_choice-1, FALSE); scrollok(list, TRUE); scroll(list); scrollok(list, FALSE); } scrolli++; print_item(list, items[(scrolli+max_choice-1)*3], items[(scrolli+max_choice-1)*3 + 1], status[scrolli+max_choice-1], max_choice-1, TRUE); #endif wnoutrefresh(list); /* print the up/down arrows */ wattrset(dialog, uarrow_attr); wmove(dialog, box_y, box_x + check_x + 5); waddch(dialog, ACS_UARROW); wmove(dialog, box_y, box_x + check_x + 6); waddstr(dialog, "(-)"); wmove(dialog, box_y + list_height + 1, box_x + check_x + 5); wattrset(dialog, scrolli+choice < item_no-1 ? darrow_attr : menubox_border_attr); waddch(dialog, scrolli+choice < item_no-1 ? ACS_DARROW : ACS_HLINE); wmove(dialog, box_y + list_height + 1, box_x + check_x + 6); waddch(dialog, scrolli+choice < item_no-1 ? '(' : ACS_HLINE); wmove(dialog, box_y + list_height + 1, box_x + check_x + 7); waddch(dialog, scrolli+choice < item_no-1 ? '+' : ACS_HLINE); wmove(dialog, box_y + list_height + 1, box_x + check_x + 8); waddch(dialog, scrolli+choice < item_no-1 ? ')' : ACS_HLINE); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); } continue; /* wait for another key press */ } else i = choice + 1; } else if (key == ' ') { /* Toggle item status */ status[scrolli+choice] = !status[scrolli+choice]; getyx(dialog, cur_y, cur_x); /* Save cursor position */ wmove(list, choice, check_x); wattrset(list, check_selected_attr); wprintw(list, "[%c]", status[scrolli+choice] ? 'X' : ' '); wnoutrefresh(list); wmove(dialog, cur_y, cur_x); /* Restore cursor to previous position */ wrefresh(dialog); continue; /* wait for another key press */ } if (i != choice) { /* De-highlight current item */ getyx(dialog, cur_y, cur_x); /* Save cursor position */ print_item(list, items[(scrolli+choice)*3], items[(scrolli+choice)*3 + 1], status[scrolli+choice], choice, FALSE); /* Highlight new item */ choice = i; print_item(list, items[(scrolli+choice)*3], items[(scrolli+choice)*3 + 1], status[scrolli+choice], choice, TRUE); wnoutrefresh(list); wmove(dialog, cur_y, cur_x); /* Restore cursor to previous position */ wrefresh(dialog); } continue; /* wait for another key press */ } switch (key) { case 'O': case 'o': delwin(dialog); for (i = 0; i < item_no; i++) if (status[i]) { if (separate_output) { fprintf(stderr, "%s\n", items[i*3]); } else { fprintf(stderr, "\"%s\" ", items[i*3]); } } free(status); return 0; case 'C': case 'c': delwin(dialog); free(status); return 1; case TAB: case KEY_LEFT: case KEY_RIGHT: if (!button) { button = 1; /* Indicates "Cancel" button is selected */ print_button(dialog, " OK ", y, x, FALSE); print_button(dialog, "Cancel", y, x+14, TRUE); } else { button = 0; /* Indicates "OK" button is selected */ print_button(dialog, "Cancel", y, x+14, FALSE); print_button(dialog, " OK ", y, x, TRUE); } wrefresh(dialog); break; case ' ': case '\n': delwin(dialog); if (!button) for (i = 0; i < item_no; i++) if (status[i]) { if (separate_output) { fprintf(stderr, "%s\n", items[i*3]); } else { fprintf(stderr, "\"%s\" ", items[i*3]); } } free(status); return button; case ESC: break; } } delwin(dialog); free(status); return -1; /* ESC pressed */ } /* End of dialog_checklist() */ /* * Print list item */ static void print_item(WINDOW *win, char *tag, char *item, int status, int choice, int selected) { int i; /* Clear 'residue' of last item */ wattrset(win, menubox_attr); wmove(win, choice, 0); for (i = 0; i < list_width; i++) waddch(win, ' '); wmove(win, choice, check_x); wattrset(win, selected ? check_selected_attr : check_attr); wprintw(win, "[%c]", status ? 'X' : ' '); wattrset(win, menubox_attr); waddch(win, ' '); wattrset(win, selected ? tag_key_selected_attr : tag_key_attr); waddch(win, tag[0]); wattrset(win, selected ? tag_selected_attr : tag_attr); waddstr(win, tag + 1); wmove(win, choice, item_x); wattrset(win, selected ? item_selected_attr : item_attr); waddstr(win, item); } /* End of print_item() */