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marcus.erl |
/*
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* menubox.c -- implements the menu box
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*
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* ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
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* MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcapw@cfw.com)
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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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/*
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* Changes by Clifford Wolf (god@clifford.at)
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*
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* [ 1998-06-13 ]
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*
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* *) A bugfix for the Page-Down problem
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*
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* *) Formerly when I used Page Down and Page Up, the cursor would be set
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* to the first position in the menu box. Now lxdialog is a bit
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* smarter and works more like other menu systems (just have a look at
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* it).
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*
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* *) Formerly if I selected something my scrolling would be broken because
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* lxdialog is re-invoked by the Menuconfig shell script, can't
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* remember the last scrolling position, and just sets it so that the
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* cursor is at the bottom of the box. Now it writes the temporary file
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* lxdialog.scrltmp which contains this information. The file is
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* deleted by lxdialog if the user leaves a submenu or enters a new
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* one, but it would be nice if Menuconfig could make another "rm -f"
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* just to be sure. Just try it out - you will recognise a difference!
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*
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* [ 1998-06-14 ]
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*
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* *) Now lxdialog is crash-safe against broken "lxdialog.scrltmp" files
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* and menus change their size on the fly.
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*
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* *) If for some reason the last scrolling position is not saved by
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* lxdialog, it sets the scrolling so that the selected item is in the
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* middle of the menu box, not at the bottom.
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*
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* 02 January 1999, Michael Elizabeth Chastain (mec@shout.net)
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* Reset 'scroll' to 0 if the value from lxdialog.scrltmp is bogus.
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* This fixes a bug in Menuconfig where using ' ' to descend into menus
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* would leave mis-synchronized lxdialog.scrltmp files lying around,
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* fscanf would read in 'scroll', and eventually that value would get used.
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*/
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#include "dialog.h"
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static int menu_width, item_x;
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/*
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* Print menu item
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*/
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static void do_print_item(WINDOW * win, const char *item, int line_y,
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int selected, int hotkey)
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{
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int j;
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char *menu_item = malloc(menu_width + 1);
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strncpy(menu_item, item, menu_width - item_x);
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menu_item[menu_width - item_x] = '\0';
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j = first_alpha(menu_item, "YyNnMmHh");
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/* Clear 'residue' of last item */
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wattrset(win, dlg.menubox.atr);
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wmove(win, line_y, 0);
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#if OLD_NCURSES
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{
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int i;
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for (i = 0; i < menu_width; i++)
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waddch(win, ' ');
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}
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#else
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wclrtoeol(win);
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#endif
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wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
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mvwaddstr(win, line_y, item_x, menu_item);
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if (hotkey) {
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wattrset(win, selected ? dlg.tag_key_selected.atr
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: dlg.tag_key.atr);
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mvwaddch(win, line_y, item_x + j, menu_item[j]);
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}
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if (selected) {
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wmove(win, line_y, item_x + 1);
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}
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free(menu_item);
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wrefresh(win);
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}
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#define print_item(index, choice, selected) \
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do { \
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item_set(index); \
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do_print_item(menu, item_str(), choice, selected, !item_is_tag(':')); \
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} while (0)
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/*
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* Print the scroll indicators.
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*/
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static void print_arrows(WINDOW * win, int item_no, int scroll, int y, int x,
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int height)
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{
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int cur_y, cur_x;
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getyx(win, cur_y, cur_x);
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wmove(win, y, x);
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if (scroll > 0) {
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wattrset(win, dlg.uarrow.atr);
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waddch(win, ACS_UARROW);
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waddstr(win, "(-)");
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} else {
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wattrset(win, dlg.menubox.atr);
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waddch(win, ACS_HLINE);
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waddch(win, ACS_HLINE);
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waddch(win, ACS_HLINE);
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waddch(win, ACS_HLINE);
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}
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y = y + height + 1;
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wmove(win, y, x);
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wrefresh(win);
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if ((height < item_no) && (scroll + height < item_no)) {
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wattrset(win, dlg.darrow.atr);
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waddch(win, ACS_DARROW);
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waddstr(win, "(+)");
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} else {
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wattrset(win, dlg.menubox_border.atr);
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waddch(win, ACS_HLINE);
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waddch(win, ACS_HLINE);
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waddch(win, ACS_HLINE);
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waddch(win, ACS_HLINE);
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}
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wmove(win, cur_y, cur_x);
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wrefresh(win);
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}
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/*
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* Display the termination buttons.
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*/
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static void print_buttons(WINDOW * win, int height, int width, int selected)
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{
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int x = width / 2 - 16;
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int y = height - 2;
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print_button(win, "Select", y, x, selected == 0);
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print_button(win, " Exit ", y, x + 12, selected == 1);
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print_button(win, " Help ", y, x + 24, selected == 2);
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wmove(win, y, x + 1 + 12 * selected);
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wrefresh(win);
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}
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/* scroll up n lines (n may be negative) */
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static void do_scroll(WINDOW *win, int *scroll, int n)
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{
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/* Scroll menu up */
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scrollok(win, TRUE);
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wscrl(win, n);
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scrollok(win, FALSE);
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*scroll = *scroll + n;
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wrefresh(win);
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}
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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(const char *title, const char *prompt,
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const void *selected, int *s_scroll)
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{
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int i, j, x, y, box_x, box_y;
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int height, width, menu_height;
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int key = 0, button = 0, scroll = 0, choice = 0;
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int first_item = 0, max_choice;
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WINDOW *dialog, *menu;
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do_resize:
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height = getmaxy(stdscr);
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width = getmaxx(stdscr);
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if (height < 15 || width < 65)
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return -ERRDISPLAYTOOSMALL;
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height -= 4;
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width -= 5;
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menu_height = height - 10;
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max_choice = MIN(menu_height, item_count());
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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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draw_shadow(stdscr, y, x, height, width);
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dialog = newwin(height, width, y, x);
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keypad(dialog, TRUE);
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draw_box(dialog, 0, 0, height, width,
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dlg.dialog.atr, dlg.border.atr);
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wattrset(dialog, dlg.border.atr);
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mvwaddch(dialog, height - 3, 0, 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, dlg.dialog.atr);
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wbkgdset(dialog, dlg.dialog.atr & A_COLOR);
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waddch(dialog, ACS_RTEE);
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print_title(dialog, title, width);
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wattrset(dialog, dlg.dialog.atr);
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print_autowrap(dialog, prompt, width - 2, 1, 3);
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menu_width = width - 6;
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box_y = height - menu_height - 5;
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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,
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y + box_y + 1, x + box_x + 1);
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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,
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dlg.menubox_border.atr, dlg.menubox.atr);
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| 240 |
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if (menu_width >= 80)
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item_x = (menu_width - 70) / 2;
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else
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item_x = 4;
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| 245 |
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/* Set choice to default item */
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item_foreach()
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if (selected && (selected == item_data()))
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choice = item_n();
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/* get the saved scroll info */
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scroll = *s_scroll;
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if ((scroll <= choice) && (scroll + max_choice > choice) &&
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| 252 |
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(scroll >= 0) && (scroll + max_choice <= item_count())) {
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first_item = scroll;
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| 254 |
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choice = choice - scroll;
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| 255 |
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} else {
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scroll = 0;
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| 257 |
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}
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| 258 |
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if ((choice >= max_choice)) {
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| 259 |
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if (choice >= item_count() - max_choice / 2)
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| 260 |
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scroll = first_item = item_count() - max_choice;
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| 261 |
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else
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| 262 |
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scroll = first_item = choice - max_choice / 2;
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| 263 |
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choice = choice - scroll;
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| 264 |
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}
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| 265 |
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| 266 |
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/* Print the menu */
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| 267 |
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for (i = 0; i < max_choice; i++) {
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| 268 |
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print_item(first_item + i, i, i == choice);
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| 269 |
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}
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| 270 |
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| 271 |
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wnoutrefresh(menu);
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| 272 |
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| 273 |
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print_arrows(dialog, item_count(), scroll,
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| 274 |
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box_y, box_x + item_x + 1, menu_height);
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| 275 |
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| 276 |
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print_buttons(dialog, height, width, 0);
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| 277 |
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wmove(menu, choice, item_x + 1);
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| 278 |
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wrefresh(menu);
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| 279 |
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| 280 |
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while (key != KEY_ESC) {
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| 281 |
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key = wgetch(menu);
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| 282 |
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| 283 |
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if (key < 256 && isalpha(key))
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| 284 |
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key = tolower(key);
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| 285 |
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| 286 |
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if (strchr("ynmh", key))
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| 287 |
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i = max_choice;
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| 288 |
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else {
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| 289 |
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for (i = choice + 1; i < max_choice; i++) {
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| 290 |
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item_set(scroll + i);
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| 291 |
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j = first_alpha(item_str(), "YyNnMmHh");
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| 292 |
|
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if (key == tolower(item_str()[j]))
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| 293 |
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break;
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| 294 |
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}
|
| 295 |
|
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if (i == max_choice)
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| 296 |
|
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for (i = 0; i < max_choice; i++) {
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| 297 |
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item_set(scroll + i);
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| 298 |
|
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j = first_alpha(item_str(), "YyNnMmHh");
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| 299 |
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if (key == tolower(item_str()[j]))
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| 300 |
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break;
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| 301 |
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}
|
| 302 |
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}
|
| 303 |
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| 304 |
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if (i < max_choice ||
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| 305 |
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key == KEY_UP || key == KEY_DOWN ||
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| 306 |
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key == '-' || key == '+' ||
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| 307 |
|
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key == KEY_PPAGE || key == KEY_NPAGE) {
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| 308 |
|
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/* Remove highligt of current item */
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| 309 |
|
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print_item(scroll + choice, choice, FALSE);
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| 310 |
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| 311 |
|
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if (key == KEY_UP || key == '-') {
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| 312 |
|
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if (choice < 2 && scroll) {
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| 313 |
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/* Scroll menu down */
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| 314 |
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do_scroll(menu, &scroll, -1);
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| 315 |
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| 316 |
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print_item(scroll, 0, FALSE);
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| 317 |
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} else
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| 318 |
|
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choice = MAX(choice - 1, 0);
|
| 319 |
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|
| 320 |
|
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} else if (key == KEY_DOWN || key == '+') {
|
| 321 |
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print_item(scroll+choice, choice, FALSE);
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| 322 |
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| 323 |
|
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if ((choice > max_choice - 3) &&
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| 324 |
|
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(scroll + max_choice < item_count())) {
|
| 325 |
|
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/* Scroll menu up */
|
| 326 |
|
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do_scroll(menu, &scroll, 1);
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| 327 |
|
|
|
| 328 |
|
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print_item(scroll+max_choice - 1,
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| 329 |
|
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max_choice - 1, FALSE);
|
| 330 |
|
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} else
|
| 331 |
|
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choice = MIN(choice + 1, max_choice - 1);
|
| 332 |
|
|
|
| 333 |
|
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} else if (key == KEY_PPAGE) {
|
| 334 |
|
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scrollok(menu, TRUE);
|
| 335 |
|
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for (i = 0; (i < max_choice); i++) {
|
| 336 |
|
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if (scroll > 0) {
|
| 337 |
|
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do_scroll(menu, &scroll, -1);
|
| 338 |
|
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print_item(scroll, 0, FALSE);
|
| 339 |
|
|
} else {
|
| 340 |
|
|
if (choice > 0)
|
| 341 |
|
|
choice--;
|
| 342 |
|
|
}
|
| 343 |
|
|
}
|
| 344 |
|
|
|
| 345 |
|
|
} else if (key == KEY_NPAGE) {
|
| 346 |
|
|
for (i = 0; (i < max_choice); i++) {
|
| 347 |
|
|
if (scroll + max_choice < item_count()) {
|
| 348 |
|
|
do_scroll(menu, &scroll, 1);
|
| 349 |
|
|
print_item(scroll+max_choice-1,
|
| 350 |
|
|
max_choice - 1, FALSE);
|
| 351 |
|
|
} else {
|
| 352 |
|
|
if (choice + 1 < max_choice)
|
| 353 |
|
|
choice++;
|
| 354 |
|
|
}
|
| 355 |
|
|
}
|
| 356 |
|
|
} else
|
| 357 |
|
|
choice = i;
|
| 358 |
|
|
|
| 359 |
|
|
print_item(scroll + choice, choice, TRUE);
|
| 360 |
|
|
|
| 361 |
|
|
print_arrows(dialog, item_count(), scroll,
|
| 362 |
|
|
box_y, box_x + item_x + 1, menu_height);
|
| 363 |
|
|
|
| 364 |
|
|
wnoutrefresh(dialog);
|
| 365 |
|
|
wrefresh(menu);
|
| 366 |
|
|
|
| 367 |
|
|
continue; /* wait for another key press */
|
| 368 |
|
|
}
|
| 369 |
|
|
|
| 370 |
|
|
switch (key) {
|
| 371 |
|
|
case KEY_LEFT:
|
| 372 |
|
|
case TAB:
|
| 373 |
|
|
case KEY_RIGHT:
|
| 374 |
|
|
button = ((key == KEY_LEFT ? --button : ++button) < 0)
|
| 375 |
|
|
? 2 : (button > 2 ? 0 : button);
|
| 376 |
|
|
|
| 377 |
|
|
print_buttons(dialog, height, width, button);
|
| 378 |
|
|
wrefresh(menu);
|
| 379 |
|
|
break;
|
| 380 |
|
|
case ' ':
|
| 381 |
|
|
case 's':
|
| 382 |
|
|
case 'y':
|
| 383 |
|
|
case 'n':
|
| 384 |
|
|
case 'm':
|
| 385 |
|
|
case '/':
|
| 386 |
|
|
/* save scroll info */
|
| 387 |
|
|
*s_scroll = scroll;
|
| 388 |
|
|
delwin(menu);
|
| 389 |
|
|
delwin(dialog);
|
| 390 |
|
|
item_set(scroll + choice);
|
| 391 |
|
|
item_set_selected(1);
|
| 392 |
|
|
switch (key) {
|
| 393 |
|
|
case 's':
|
| 394 |
|
|
return 3;
|
| 395 |
|
|
case 'y':
|
| 396 |
|
|
return 3;
|
| 397 |
|
|
case 'n':
|
| 398 |
|
|
return 4;
|
| 399 |
|
|
case 'm':
|
| 400 |
|
|
return 5;
|
| 401 |
|
|
case ' ':
|
| 402 |
|
|
return 6;
|
| 403 |
|
|
case '/':
|
| 404 |
|
|
return 7;
|
| 405 |
|
|
}
|
| 406 |
|
|
return 0;
|
| 407 |
|
|
case 'h':
|
| 408 |
|
|
case '?':
|
| 409 |
|
|
button = 2;
|
| 410 |
|
|
case '\n':
|
| 411 |
|
|
*s_scroll = scroll;
|
| 412 |
|
|
delwin(menu);
|
| 413 |
|
|
delwin(dialog);
|
| 414 |
|
|
item_set(scroll + choice);
|
| 415 |
|
|
item_set_selected(1);
|
| 416 |
|
|
return button;
|
| 417 |
|
|
case 'e':
|
| 418 |
|
|
case 'x':
|
| 419 |
|
|
key = KEY_ESC;
|
| 420 |
|
|
break;
|
| 421 |
|
|
case KEY_ESC:
|
| 422 |
|
|
key = on_key_esc(menu);
|
| 423 |
|
|
break;
|
| 424 |
|
|
case KEY_RESIZE:
|
| 425 |
|
|
on_key_resize();
|
| 426 |
|
|
delwin(menu);
|
| 427 |
|
|
delwin(dialog);
|
| 428 |
|
|
goto do_resize;
|
| 429 |
|
|
}
|
| 430 |
|
|
}
|
| 431 |
|
|
delwin(menu);
|
| 432 |
|
|
delwin(dialog);
|
| 433 |
|
|
return key; /* ESC pressed */
|
| 434 |
|
|
}
|
