kernel_optimize_test/scripts/kconfig/lxdialog/checklist.c
Samuel Thibault f043ca43c1 [PATCH] Enhancing accessibility of lxdialog
For easily getting fairly good accessibility, the TTY cursor should
always be left at the focus location.  This patch fixes the checklist by
just having the list refreshed after the dialog box (hence the cursor
position remains in the list).

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-14 09:15:09 -07:00

334 lines
8.6 KiB
C

/*
* checklist.c -- implements the checklist box
*
* ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
* Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
* Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
* MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
*
* 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 list_width, check_x, item_x;
/*
* Print list item
*/
static void print_item(WINDOW * win, const 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, selected ? tag_selected_attr : tag_attr);
mvwaddch(win, choice, item_x, item[0]);
wattrset(win, selected ? item_selected_attr : item_attr);
waddstr(win, (char *)item + 1);
if (selected) {
wmove(win, choice, check_x + 1);
wrefresh(win);
}
}
/*
* Print the scroll indicators.
*/
static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
int y, int x, int height)
{
wmove(win, y, x);
if (scroll > 0) {
wattrset(win, uarrow_attr);
waddch(win, ACS_UARROW);
waddstr(win, "(-)");
} else {
wattrset(win, menubox_attr);
waddch(win, ACS_HLINE);
waddch(win, ACS_HLINE);
waddch(win, ACS_HLINE);
waddch(win, ACS_HLINE);
}
y = y + height + 1;
wmove(win, y, x);
if ((height < item_no) && (scroll + choice < item_no - 1)) {
wattrset(win, darrow_attr);
waddch(win, ACS_DARROW);
waddstr(win, "(+)");
} else {
wattrset(win, menubox_border_attr);
waddch(win, ACS_HLINE);
waddch(win, ACS_HLINE);
waddch(win, ACS_HLINE);
waddch(win, ACS_HLINE);
}
}
/*
* Display the termination buttons
*/
static void print_buttons(WINDOW * dialog, int height, int width, int selected)
{
int x = width / 2 - 11;
int y = height - 2;
print_button(dialog, "Select", y, x, selected == 0);
print_button(dialog, " Help ", y, x + 14, selected == 1);
wmove(dialog, y, x + 1 + 14 * selected);
wrefresh(dialog);
}
/*
* Display a dialog box with a list of options that can be turned on or off
* in the style of radiolist (only one option turned on at a time).
*/
int dialog_checklist(const char *title, const char *prompt, int height,
int width, int list_height, int item_no,
const char *const *items)
{
int i, x, y, box_x, box_y;
int key = 0, button = 0, choice = 0, scroll = 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");
if ((!choice && status[i])
|| !strcasecmp(items[i * 3 + 2], "selected"))
choice = i + 1;
}
if (choice)
choice--;
max_choice = MIN(list_height, item_no);
/* center dialog box on screen */
x = (COLS - width) / 2;
y = (LINES - height) / 2;
draw_shadow(stdscr, y, x, height, width);
dialog = newwin(height, width, y, x);
keypad(dialog, TRUE);
draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
wattrset(dialog, border_attr);
mvwaddch(dialog, height - 3, 0, ACS_LTEE);
for (i = 0; i < width - 2; i++)
waddch(dialog, ACS_HLINE);
wattrset(dialog, dialog_attr);
waddch(dialog, ACS_RTEE);
print_title(dialog, title, width);
wattrset(dialog, dialog_attr);
print_autowrap(dialog, prompt, width - 2, 1, 3);
list_width = width - 6;
box_y = height - list_height - 5;
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);
/* Find length of longest item in order to center checklist */
check_x = 0;
for (i = 0; i < item_no; i++)
check_x = MAX(check_x, +strlen(items[i * 3 + 1]) + 4);
check_x = (list_width - check_x) / 2;
item_x = check_x + 4;
if (choice >= list_height) {
scroll = choice - list_height + 1;
choice -= scroll;
}
/* Print the list */
for (i = 0; i < max_choice; i++) {
print_item(list, items[(scroll + i) * 3 + 1],
status[i + scroll], i, i == choice);
}
print_arrows(dialog, choice, item_no, scroll,
box_y, box_x + check_x + 5, list_height);
print_buttons(dialog, height, width, 0);
wnoutrefresh(dialog);
wnoutrefresh(list);
doupdate();
while (key != ESC) {
key = wgetch(dialog);
for (i = 0; i < max_choice; i++)
if (toupper(key) ==
toupper(items[(scroll + i) * 3 + 1][0]))
break;
if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
key == '+' || key == '-') {
if (key == KEY_UP || key == '-') {
if (!choice) {
if (!scroll)
continue;
/* Scroll list down */
if (list_height > 1) {
/* De-highlight current first item */
print_item(list, items[scroll * 3 + 1],
status[scroll], 0, FALSE);
scrollok(list, TRUE);
wscrl(list, -1);
scrollok(list, FALSE);
}
scroll--;
print_item(list, items[scroll * 3 + 1], status[scroll], 0, TRUE);
print_arrows(dialog, choice, item_no,
scroll, box_y, box_x + check_x + 5, list_height);
wnoutrefresh(dialog);
wrefresh(list);
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)
continue;
/* Scroll list up */
if (list_height > 1) {
/* De-highlight current last item before scrolling up */
print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
status[scroll + max_choice - 1],
max_choice - 1, FALSE);
scrollok(list, TRUE);
wscrl(list, 1);
scrollok(list, FALSE);
}
scroll++;
print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
status[scroll + max_choice - 1], max_choice - 1, TRUE);
print_arrows(dialog, choice, item_no,
scroll, box_y, box_x + check_x + 5, list_height);
wnoutrefresh(dialog);
wrefresh(list);
continue; /* wait for another key press */
} else
i = choice + 1;
}
if (i != choice) {
/* De-highlight current item */
print_item(list, items[(scroll + choice) * 3 + 1],
status[scroll + choice], choice, FALSE);
/* Highlight new item */
choice = i;
print_item(list, items[(scroll + choice) * 3 + 1],
status[scroll + choice], choice, TRUE);
wnoutrefresh(dialog);
wrefresh(list);
}
continue; /* wait for another key press */
}
switch (key) {
case 'H':
case 'h':
case '?':
fprintf(stderr, "%s", items[(scroll + choice) * 3]);
delwin(dialog);
free(status);
return 1;
case TAB:
case KEY_LEFT:
case KEY_RIGHT:
button = ((key == KEY_LEFT ? --button : ++button) < 0)
? 1 : (button > 1 ? 0 : button);
print_buttons(dialog, height, width, button);
wrefresh(dialog);
break;
case 'S':
case 's':
case ' ':
case '\n':
if (!button) {
if (!status[scroll + choice]) {
for (i = 0; i < item_no; i++)
status[i] = 0;
status[scroll + choice] = 1;
for (i = 0; i < max_choice; i++)
print_item(list, items[(scroll + i) * 3 + 1],
status[scroll + i], i, i == choice);
}
wnoutrefresh(dialog);
wrefresh(list);
for (i = 0; i < item_no; i++)
if (status[i])
fprintf(stderr, "%s", items[i * 3]);
} else
fprintf(stderr, "%s", items[(scroll + choice) * 3]);
delwin(dialog);
free(status);
return button;
case 'X':
case 'x':
key = ESC;
case ESC:
break;
}
/* Now, update everything... */
doupdate();
}
delwin(dialog);
free(status);
return -1; /* ESC pressed */
}