/*
* 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, dlg.menubox.atr);
wmove(win, choice, 0);
for (i = 0; i < list_width; i++)
waddch(win, ' ');
wmove(win, choice, check_x);
wattrset(win, selected ? dlg.check_selected.atr
: dlg.check.atr);
wprintw(win, "(%c)", status ? 'X' : ' ');
wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
mvwaddch(win, choice, item_x, item[0]);
wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
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, dlg.uarrow.atr);
waddch(win, ACS_UARROW);
waddstr(win, "(-)");
} else {
wattrset(win, dlg.menubox.atr);
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, dlg.darrow.atr);
waddch(win, ACS_DARROW);
waddstr(win, "(+)");
} else {
wattrset(win, dlg.menubox_border.atr);
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,
dlg.dialog.atr, dlg.border.atr);
wattrset(dialog, dlg.border.atr);
mvwaddch(dialog, height - 3, 0, ACS_LTEE);
for (i = 0; i < width - 2; i++)
waddch(dialog, ACS_HLINE);
wattrset(dialog, dlg.dialog.atr);
waddch(dialog, ACS_RTEE);
print_title(dialog, title, width);
wattrset(dialog, dlg.dialog.atr);
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,
dlg.menubox_border.atr, dlg.menubox.atr);
/* 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++) {
if (i != choice)
print_item(list, items[(scroll + i) * 3 + 1],
status[i + scroll], i, 0);
}
print_item(list, items[(scroll + choice) * 3 + 1],
status[choice + scroll], choice, 1);
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 */
}
