324 lines
11 KiB
C
324 lines
11 KiB
C
/*
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* menubox.c -- implements the menu box
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*
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* AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <dialog.h>
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#include "dialog.priv.h"
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static void print_item(WINDOW *win, unsigned char *tag, unsigned char *item, int choice, int selected);
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static int menu_width, tag_x, item_x;
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/*
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* Display a menu for choosing among a number of options
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*/
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int dialog_menu(unsigned char *title, unsigned char *prompt, int height, int width, int menu_height, int item_no, unsigned char **items, unsigned char *result)
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{
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int i, x, y, cur_x, cur_y, box_x, box_y, key = 0, button = 0, choice = 0,
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scroll = 0, max_choice;
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WINDOW *dialog, *menu;
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max_choice = MIN(menu_height, item_no);
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/* center dialog box on screen */
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x = (COLS - width)/2;
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y = (LINES - height)/2;
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#ifdef HAVE_NCURSES
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if (use_shadow)
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draw_shadow(stdscr, y, x, height, width);
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#endif
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dialog = newwin(height, width, y, x);
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if (dialog == NULL) {
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endwin();
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fprintf(stderr, "\nnewwin(%d,%d,%d,%d) failed, maybe wrong dims\n", height,width,y,x);
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exit(1);
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}
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keypad(dialog, TRUE);
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draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
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wattrset(dialog, border_attr);
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wmove(dialog, height-3, 0);
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waddch(dialog, ACS_LTEE);
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for (i = 0; i < width-2; i++)
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waddch(dialog, ACS_HLINE);
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wattrset(dialog, dialog_attr);
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waddch(dialog, ACS_RTEE);
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wmove(dialog, height-2, 1);
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for (i = 0; i < width-2; i++)
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waddch(dialog, ' ');
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if (title != NULL) {
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wattrset(dialog, title_attr);
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wmove(dialog, 0, (width - strlen(title))/2 - 1);
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waddch(dialog, ' ');
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waddstr(dialog, title);
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waddch(dialog, ' ');
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}
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wattrset(dialog, dialog_attr);
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wmove(dialog, 1, 2);
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print_autowrap(dialog, prompt, height-1, width-2, width, 1, 2, TRUE, FALSE);
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menu_width = width-6;
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getyx(dialog, cur_y, cur_x);
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box_y = cur_y + 1;
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box_x = (width - menu_width)/2 - 1;
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/* create new window for the menu */
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menu = subwin(dialog, menu_height, menu_width, y + box_y + 1, x + box_x + 1);
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if (menu == NULL) {
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endwin();
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fprintf(stderr, "\nsubwin(dialog,%d,%d,%d,%d) failed, maybe wrong dims\n", menu_height,menu_width,y+box_y+1,x+box_x+1);
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exit(1);
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}
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keypad(menu, TRUE);
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/* draw a box around the menu items */
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draw_box(dialog, box_y, box_x, menu_height+2, menu_width+2, menubox_border_attr, menubox_attr);
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tag_x = 0;
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item_x = 0;
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/* Find length of longest item in order to center menu */
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for (i = 0; i < item_no; i++) {
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tag_x = MAX(tag_x, strlen(items[i*2]) + strlen(items[i*2 + 1]) + 2);
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item_x = MAX(item_x, strlen(items[i*2]));
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}
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tag_x = (menu_width - tag_x) / 2;
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item_x = tag_x + item_x + 2;
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/* Print the menu */
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for (i = 0; i < max_choice; i++)
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print_item(menu, items[i*2], items[i*2 + 1], i, i == choice);
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wnoutrefresh(menu);
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if (menu_height < item_no) {
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wattrset(dialog, darrow_attr);
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wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 1);
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waddch(dialog, ACS_DARROW);
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wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 2);
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waddstr(dialog,"(+)");
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}
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x = width/2-11;
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y = height-2;
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print_button(dialog, "Cancel", y, x+14, FALSE);
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print_button(dialog, " OK ", y, x, TRUE);
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wrefresh(dialog);
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while (key != ESC) {
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key = wgetch(dialog);
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/* Check if key pressed matches first character of any item tag in menu */
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for (i = 0; i < max_choice; i++)
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if (key < 0x100 && toupper(key) == toupper(items[(scroll+i)*2][0]))
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break;
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if (i < max_choice || (key >= '1' && key <= MIN('9', '0'+max_choice)) ||
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key == KEY_UP || key == KEY_DOWN || key == '-' || key == '+') {
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if (key >= '1' && key <= MIN('9', '0'+max_choice))
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i = key - '1';
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else if (key == KEY_UP || key == '-') {
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if (!choice) {
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if (scroll) {
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#ifdef BROKEN_WSCRL
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/* wscrl() in ncurses 1.8.1 seems to be broken, causing a segmentation
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violation when scrolling windows of height = 4, so scrolling is not
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used for now */
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scroll--;
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getyx(dialog, cur_y, cur_x); /* Save cursor position */
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/* Reprint menu to scroll down */
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for (i = 0; i < max_choice; i++)
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print_item(menu, items[(scroll+i)*2], items[(scroll+i)*2 + 1], i, i == choice);
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#else
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/* Scroll menu down */
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getyx(dialog, cur_y, cur_x); /* Save cursor position */
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if (menu_height > 1) {
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/* De-highlight current first item before scrolling down */
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print_item(menu, items[scroll*2], items[scroll*2 + 1], 0, FALSE);
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scrollok(menu, TRUE);
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wscrl(menu, -1);
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scrollok(menu, FALSE);
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}
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scroll--;
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print_item(menu, items[scroll*2], items[scroll*2 + 1], 0, TRUE);
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#endif
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wnoutrefresh(menu);
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/* print the up/down arrows */
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wmove(dialog, box_y, box_x + tag_x + 1);
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wattrset(dialog, scroll ? uarrow_attr : menubox_attr);
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waddch(dialog, scroll ? ACS_UARROW : ACS_HLINE);
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wmove(dialog, box_y, box_x + tag_x + 2);
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waddch(dialog, scroll ? '(' : ACS_HLINE);
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wmove(dialog, box_y, box_x + tag_x + 3);
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waddch(dialog, scroll ? '-' : ACS_HLINE);
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wmove(dialog, box_y, box_x + tag_x + 4);
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waddch(dialog, scroll ? ')' : ACS_HLINE);
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wattrset(dialog, darrow_attr);
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wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 1);
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waddch(dialog, ACS_DARROW);
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wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 2);
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waddstr(dialog,"(+)");
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wmove(dialog, cur_y, cur_x); /* Restore cursor position */
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wrefresh(dialog);
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}
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continue; /* wait for another key press */
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}
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else
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i = choice - 1;
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}
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else if (key == KEY_DOWN || key == '+')
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if (choice == max_choice - 1) {
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if (scroll+choice < item_no-1) {
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#ifdef BROKEN_WSCRL
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/* wscrl() in ncurses 1.8.1 seems to be broken, causing a segmentation
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violation when scrolling windows of height = 4, so scrolling is not
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used for now */
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scroll++;
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getyx(dialog, cur_y, cur_x); /* Save cursor position */
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/* Reprint menu to scroll up */
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for (i = 0; i < max_choice; i++)
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print_item(menu, items[(scroll+i)*2], items[(scroll+i)*2 + 1], i, i == choice);
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#else
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/* Scroll menu up */
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getyx(dialog, cur_y, cur_x); /* Save cursor position */
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if (menu_height > 1) {
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/* De-highlight current last item before scrolling up */
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print_item(menu, items[(scroll+max_choice-1)*2], items[(scroll+max_choice-1)*2 + 1], max_choice-1, FALSE);
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scrollok(menu, TRUE);
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scroll(menu);
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scrollok(menu, FALSE);
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}
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scroll++;
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print_item(menu, items[(scroll+max_choice-1)*2], items[(scroll+max_choice-1)*2 + 1], max_choice-1, TRUE);
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#endif
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wnoutrefresh(menu);
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/* print the up/down arrows */
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wattrset(dialog, uarrow_attr);
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wmove(dialog, box_y, box_x + tag_x + 1);
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waddch(dialog, ACS_UARROW);
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wmove(dialog, box_y, box_x + tag_x + 2);
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waddstr(dialog,"(-)");
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wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 1);
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wattrset(dialog, scroll+choice < item_no-1 ? darrow_attr : menubox_border_attr);
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waddch(dialog, scroll+choice < item_no-1 ? ACS_DARROW : ACS_HLINE);
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wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 2);
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waddch(dialog, scroll+choice < item_no-1 ? '(' : ACS_HLINE);
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wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 3);
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waddch(dialog, scroll+choice < item_no-1 ? '+' : ACS_HLINE);
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wmove(dialog, box_y + menu_height + 1, box_x + tag_x + 4);
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waddch(dialog, scroll+choice < item_no-1 ? ')' : ACS_HLINE);
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wmove(dialog, cur_y, cur_x); /* Restore cursor position */
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wrefresh(dialog);
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}
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continue; /* wait for another key press */
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}
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else
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i = choice + 1;
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if (i != choice) {
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/* De-highlight current item */
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getyx(dialog, cur_y, cur_x); /* Save cursor position */
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print_item(menu, items[(scroll+choice)*2], items[(scroll+choice)*2 + 1], choice, FALSE);
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/* Highlight new item */
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choice = i;
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print_item(menu, items[(scroll+choice)*2], items[(scroll+choice)*2 + 1], choice, TRUE);
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wnoutrefresh(menu);
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wmove(dialog, cur_y, cur_x); /* Restore cursor to previous position */
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wrefresh(dialog);
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}
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continue; /* wait for another key press */
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}
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switch (key) {
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case 'O':
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case 'o':
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delwin(dialog);
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strcpy(result, items[(scroll+choice)*2]);
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return 0;
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case 'C':
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case 'c':
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delwin(dialog);
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return 1;
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case KEY_BTAB:
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case TAB:
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case KEY_LEFT:
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case KEY_RIGHT:
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if (!button) {
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button = 1; /* Indicates "Cancel" button is selected */
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print_button(dialog, " OK ", y, x, FALSE);
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print_button(dialog, "Cancel", y, x+14, TRUE);
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}
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else {
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button = 0; /* Indicates "OK" button is selected */
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print_button(dialog, "Cancel", y, x+14, FALSE);
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print_button(dialog, " OK ", y, x, TRUE);
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}
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wrefresh(dialog);
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break;
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case ' ':
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case '\r':
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case '\n':
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delwin(dialog);
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if (!button)
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strcpy(result, items[(scroll+choice)*2]);
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return button;
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case ESC:
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break;
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}
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}
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delwin(dialog);
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return -1; /* ESC pressed */
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}
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/* End of dialog_menu() */
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/*
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* Print menu item
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*/
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static void print_item(WINDOW *win, unsigned char *tag, unsigned char *item, int choice, int selected)
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{
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int i;
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/* Clear 'residue' of last item */
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wattrset(win, menubox_attr);
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wmove(win, choice, 0);
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for (i = 0; i < menu_width; i++)
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waddch(win, ' ');
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wmove(win, choice, tag_x);
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wattrset(win, selected ? tag_key_selected_attr : tag_key_attr);
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waddch(win, tag[0]);
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wattrset(win, selected ? tag_selected_attr : tag_attr);
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waddstr(win, tag + 1);
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wmove(win, choice, item_x);
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wattrset(win, selected ? item_selected_attr : item_attr);
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waddstr(win, item);
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}
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/* End of print_item() */
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