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- /*
- * 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 int menu_width, tag_x, item_x;
-
- /*
- * Print menu item
- */
- static void
- print_item (WINDOW * win, const char *tag, const 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);
- }
-
- /*
- * Display a menu for choosing among a number of options
- */
- int
- dialog_menu (const char *title, const char *prompt, int height, int width,
- int menu_height, int item_no, const char * const * items)
- {
- int i, x, y, cur_x, cur_y, box_x, box_y;
- int key = 0, button = 0, choice = 0, scroll = 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);
- mouse_setbase (x, y);
- 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 - 2, 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);
-
- /* register the new window, along with its borders */
- mouse_mkbigregion (box_y, box_x, menu_height + 2, menu_width + 2,
- item_no, item_x /* the threshold */ , 1 /* dirty mode */ );
-
- 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 = mouse_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[(scroll + i) * 2][0]))
- break;
-
- if (i < max_choice ||
- (key >= '1' && key <= MIN ('9', '0' + max_choice)) ||
- key == KEY_UP || key == KEY_DOWN || key == '-' ||
- key == '+' || (key >= M_EVENT && key - M_EVENT < ' ')) {
- if (key >= '1' && key <= MIN ('9', '0' + max_choice))
- i = key - '1';
- else if (key >= M_EVENT)
- i = key - M_EVENT;
- else if (key == KEY_UP || key == '-') {
- if (!choice) {
- if (scroll) {
-
- /* Scroll menu down */
- getyx (dialog, cur_y, cur_x);
- if (menu_height > 1) {
- /* De-highlight current first item */
- print_item (menu, items[scroll * 2],
- items[scroll * 2 + 1], 0, FALSE);
- scrollok (menu, TRUE);
- wscrl (menu, -1);
- scrollok (menu, FALSE);
- }
- scroll--;
- print_item (menu, items[scroll * 2],
- items[scroll * 2 + 1], 0, TRUE);
- wnoutrefresh (menu);
-
- /* print the up/down arrows */
- wmove (dialog, box_y, box_x + tag_x + 1);
- wattrset (dialog, scroll ? uarrow_attr : menubox_attr);
- waddch (dialog, scroll ? ACS_UARROW : ACS_HLINE);
- wmove (dialog, box_y, box_x + tag_x + 2);
- waddch (dialog, scroll ? '(' : ACS_HLINE);
- wmove (dialog, box_y, box_x + tag_x + 3);
- waddch (dialog, scroll ? '-' : ACS_HLINE);
- wmove (dialog, box_y, box_x + tag_x + 4);
- waddch (dialog, scroll ? ')' : 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);
- wrefresh (dialog);
- }
- continue; /* wait for another key press */
- } else
- i = choice - 1;
- } else if (key == KEY_DOWN || key == '+')
- if (choice == max_choice - 1) {
- if (scroll + choice < item_no - 1) {
- /* Scroll menu up */
- getyx (dialog, cur_y, cur_x);
- if (menu_height > 1) {
- /* De-highlight current last item */
- print_item (menu, items[(scroll + max_choice - 1)
- * 2], items[(scroll + max_choice - 1)
- * 2 + 1], max_choice - 1, FALSE);
- scrollok (menu, TRUE);
- scroll (menu);
- scrollok (menu, FALSE);
- }
- scroll++;
- print_item (menu, items[(scroll + max_choice - 1) * 2],
- items[(scroll + max_choice - 1) * 2 + 1],
- max_choice - 1, TRUE);
- 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, scroll + choice < item_no - 1 ?
- darrow_attr : menubox_border_attr);
- waddch (dialog, scroll + choice < item_no - 1 ?
- ACS_DARROW : ACS_HLINE);
- wmove (dialog, box_y + menu_height + 1,
- box_x + tag_x + 2);
- waddch (dialog, scroll + choice < item_no - 1 ?
- '(' : ACS_HLINE);
- wmove (dialog, box_y + menu_height + 1,
- box_x + tag_x + 3);
- waddch (dialog, scroll + choice < item_no - 1 ?
- '+' : ACS_HLINE);
- wmove (dialog, box_y + menu_height + 1,
- box_x + tag_x + 4);
- waddch (dialog, scroll + choice < item_no - 1 ?
- ')' : ACS_HLINE);
- wmove (dialog, cur_y, cur_x);
- 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[(scroll + choice) * 2],
- items[(scroll + choice) * 2 + 1], choice, FALSE);
-
- /* Highlight new item */
- choice = i;
- print_item (menu, items[(scroll + choice) * 2],
- items[(scroll + choice) * 2 + 1], choice, TRUE);
- wnoutrefresh (menu);
- wmove (dialog, cur_y, cur_x);
- wrefresh (dialog);
- }
- continue; /* wait for another key press */
- }
- switch (key) {
- case 'O':
- case 'o':
- case M_EVENT + 'O':
- delwin (dialog);
- return scroll + choice;
- case 'C':
- case 'c':
- case M_EVENT + 'C':
- delwin (dialog);
- return -2;
- case M_EVENT + 'o': /* mouse enter... */
- case M_EVENT + 'c': /* use the code for toggling */
- button = (key == M_EVENT + 'o');
- case ' ':
- 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 '\n':
- delwin (dialog);
- return (button? -2 : (scroll + choice));
- case ESC:
- break;
- }
- }
-
- delwin (dialog);
- return -1; /* ESC pressed */
- }
-