/* * menubox.c -- implements the menu 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 choice, int selected); static int menu_width, tag_x, item_x; /* * Display a menu for choosing among a number of options */ int dialog_menu(char *title, char *prompt, int height, int width, int menu_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; WINDOW *dialog, *menu; max_choice = MIN(menu_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); menu_width = width-6; getyx(dialog, cur_y, cur_x); box_y = cur_y + 1; box_x = (width - menu_width)/2 - 1; /* create new window for the menu */ menu = subwin(dialog, menu_height, menu_width, y + box_y + 1, x + box_x + 1); keypad(menu, TRUE); /* draw a box around the menu items */ draw_box(dialog, box_y, box_x, menu_height+2, menu_width+2, menubox_border_attr, menubox_attr); tag_x = 0; item_x = 0; /* Find length of longest item in order to center menu */ for (i = 0; i < item_no; i++) { tag_x = MAX(tag_x, strlen(items[i*2]) + strlen(items[i*2 + 1]) + 2); item_x = MAX(item_x, strlen(items[i*2])); } tag_x = (menu_width - tag_x) / 2; item_x = tag_x + item_x + 2; /* Print the menu */ for (i = 0; i < max_choice; i++) print_item(menu, items[i*2], items[i*2 + 1], i, i == choice); wnoutrefresh(menu); if (menu_height < item_no) { wattrset(dialog, darrow_attr); wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 1); waddch(dialog, ACS_DARROW); wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 2); 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 menu */ for (i = 0; i < max_choice; i++) if (toupper(key) == toupper(items[(scrolli+i)*2][0])) break; /* i = (choice+scrolli+1) % max_choice ; while (i != choice+scrolli) { if (toupper(key) == toupper(items[i*2][0])) break; i = (i + 1) % max_choice; } */ if (i < max_choice || (key >= '1' && key <= MIN('9', '0'+max_choice)) || key == KEY_UP || key == KEY_DOWN || 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 menu to scroll down */ for (i = 0; i < max_choice; i++) print_item(menu, items[(scrolli+i)*2], items[(scrolli+i)*2 + 1], i, i == choice); #else /* Scroll menu down */ getyx(dialog, cur_y, cur_x); /* Save cursor position */ if (menu_height > 1) { /* De-highlight current first item before scrolling down */ print_item(menu, items[scrolli*2], items[scrolli*2 + 1], 0, FALSE); scrollok(menu, TRUE); wscrl(menu, -1); scrollok(menu, FALSE); } scrolli--; print_item(menu, items[scrolli*2], items[scrolli*2 + 1], 0, TRUE); #endif wnoutrefresh(menu); /* print the up/down arrows */ wmove(dialog, box_y, box_x + tag_x + 1); wattrset(dialog, scrolli ? uarrow_attr : menubox_attr); waddch(dialog, scrolli ? ACS_UARROW : ACS_HLINE); wmove(dialog, box_y, box_x + tag_x + 2); waddch(dialog, scrolli ? '(' : ACS_HLINE); wmove(dialog, box_y, box_x + tag_x + 3); waddch(dialog, scrolli ? '-' : ACS_HLINE); wmove(dialog, box_y, box_x + tag_x + 4); waddch(dialog, scrolli ? ')' : ACS_HLINE); wattrset(dialog, darrow_attr); wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 1); waddch(dialog, ACS_DARROW); wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 2); waddstr(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 menu to scroll up */ for (i = 0; i < max_choice; i++) print_item(menu, items[(scrolli+i)*2], items[(scrolli+i)*2 + 1], i, i == choice); #else /* Scroll menu up */ getyx(dialog, cur_y, cur_x); /* Save cursor position */ if (menu_height > 1) { /* De-highlight current last item before scrolling up */ print_item(menu, items[(scrolli+max_choice-1)*2], items[(scrolli+max_choice-1)*2 + 1], max_choice-1, FALSE); scrollok(menu, TRUE); scroll(menu); scrollok(menu, FALSE); } scrolli++; print_item(menu, items[(scrolli+max_choice-1)*2], items[(scrolli+max_choice-1)*2 + 1], max_choice-1, TRUE); #endif wnoutrefresh(menu); /* print the up/down arrows */ wattrset(dialog, uarrow_attr); wmove(dialog, box_y, box_x + tag_x + 1); waddch(dialog, ACS_UARROW); wmove(dialog, box_y, box_x + tag_x + 2); waddstr(dialog,"(-)"); wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 1); 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 + menu_height + 1, box_x + tag_x + 2); waddch(dialog, scrolli+choice < item_no-1 ? '(' : ACS_HLINE); wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 3); waddch(dialog, scrolli+choice < item_no-1 ? '+' : ACS_HLINE); wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 4); 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; if (i != choice) { /* De-highlight current item */ getyx(dialog, cur_y, cur_x); /* Save cursor position */ print_item(menu, items[(scrolli+choice)*2], items[(scrolli+choice)*2 + 1], choice, FALSE); /* Highlight new item */ choice = i; print_item(menu, items[(scrolli+choice)*2], items[(scrolli+choice)*2 + 1], choice, TRUE); wnoutrefresh(menu); 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); fprintf(stderr, items[(scrolli+choice)*2]); return 0; case 'C': case 'c': delwin(dialog); 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) fprintf(stderr, items[(scrolli+choice)*2]); return button; case ESC: break; } } delwin(dialog); return -1; /* ESC pressed */ } /* End of dialog_menu() */ /* * Print menu item */ static void print_item(WINDOW *win, char *tag, char *item, int choice, int selected) { int i; /* Clear 'residue' of last item */ wattrset(win, menubox_attr); wmove(win, choice, 0); for (i = 0; i < menu_width; i++) waddch(win, ' '); wmove(win, choice, tag_x); 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() */