freebsd-dev/gnu/lib/libdialog/radiolist.c
Jordan K. Hubbard a59ff6e254 Go on one of my periodic rampages through this code, trying to make
it DTRT.  In the process, discover the usual 10-15 evil bogons which
have been lurking in it for years.  This closes, for one thing, the
recent report Mike Smith made about nested checklist menus returning
with the scrolling region messed up.
1997-01-17 08:19:19 +00:00

542 lines
16 KiB
C

/*
* radiolist.c -- implements the radiolist box
*
* AUTHOR: Stuart Herbert - S.Herbert@sheffield.ac.uk
* (from checklist.c by Savio Lam (lam836@cs.cuhk.hk))
*
* Substantial rennovation: 12/18/95, Jordan K. Hubbard
*
* 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>
#include "dialog.priv.h"
static void print_item(WINDOW *win, char *tag, char *item, int status, int choice, int selected, dialogMenuItem *me);
#define DREF(di, item) ((di) ? &((di)[(item)]) : NULL)
static int list_width, check_x, item_x;
/*
* Display a dialog box with a list of options that can be turned on or off
*/
int
dialog_radiolist(unsigned char *title, unsigned char *prompt, int height, int width, int list_height,
int cnt, void *it, unsigned char *result)
{
int i, j, x, y, cur_x, cur_y, box_x, box_y, key = 0, button, choice,
l, k, scroll, max_choice, *status, item_no = 0, was_on = 0;
int redraw_menu = FALSE;
int rval = 0;
char okButton, cancelButton;
WINDOW *dialog, *list;
unsigned char **items = NULL;
dialogMenuItem *ditems;
/* Allocate space for storing item on/off status */
if ((status = alloca(sizeof(int) * abs(cnt))) == NULL) {
endwin();
fprintf(stderr, "\nCan't allocate memory in dialog_radiolist().\n");
exit(-1);
}
draw:
button = choice = scroll = 0;
/* Previous calling syntax, e.g. just a list of strings? */
if (cnt >= 0) {
items = it;
ditems = NULL;
item_no = cnt;
/* Initializes status */
for (i = 0; i < item_no; i++) {
status[i] = !strcasecmp(items[i*3 + 2], "on");
if (status[i]) {
if (was_on)
status[i] = FALSE;
else
was_on = 1;
}
}
}
/* It's the new specification format - fake the rest of the code out */
else {
item_no = abs(cnt);
ditems = it;
if (!items)
items = (unsigned char **)alloca((item_no * 3) * sizeof(unsigned char *));
/* Initializes status */
for (i = 0; i < item_no; i++) {
status[i] = ditems[i].checked ? ditems[i].checked(&ditems[i]) : FALSE;
if (status[i]) {
if (was_on)
status[i] = FALSE;
else
was_on = 1;
}
items[i*3] = ditems[i].prompt;
items[i*3 + 1] = ditems[i].title;
items[i*3 + 2] = status[i] ? "on" : "off";
}
}
max_choice = MIN(list_height, item_no);
check_x = 0;
item_x = 0;
/* Find length of longest item in order to center radiolist */
for (i = 0; i < item_no; i++) {
l = strlen(items[i * 3]);
for (j = 0; j < item_no; j++) {
k = strlen(items[j * 3 + 1]);
check_x = MAX(check_x, l + k + 6);
}
item_x = MAX(item_x, l);
}
if (height < 0)
height = strheight(prompt) + list_height + 4 + 2;
if (width < 0) {
i = strwidth(prompt);
j = ((title != NULL) ? strwidth(title) : 0);
width = MAX(i, j);
width = MAX(width, check_x + 4) + 4;
}
width = MAX(width, 24);
if (width > COLS)
width = COLS;
if (height > LINES)
height = LINES;
/* center dialog box on screen */
x = DialogX ? DialogX : (COLS - width) / 2;
y = DialogY ? DialogY : (LINES - height) / 2;
#ifdef HAVE_NCURSES
if (use_shadow)
draw_shadow(stdscr, y, x, height, width);
#endif
dialog = newwin(height, width, y, x);
if (dialog == NULL) {
endwin();
fprintf(stderr, "\nnewwin(%d,%d,%d,%d) failed, maybe wrong dims\n", height, width, y, x);
return -1;
}
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);
wmove(dialog, 1, 2);
print_autowrap(dialog, prompt, height - 1, width - 2, width, 1, 2, TRUE, FALSE);
list_width = width - 6;
getyx(dialog, cur_y, cur_x);
box_y = cur_y + 1;
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);
if (list == NULL) {
delwin(dialog);
endwin();
fprintf(stderr, "\nsubwin(dialog,%d,%d,%d,%d) failed, maybe wrong dims\n", list_height, list_width,
y + box_y + 1,x + box_x + 1);
return -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);
check_x = (list_width - check_x) / 2;
item_x = check_x + item_x + 6;
/* Print the list */
for (i = 0; i < max_choice; i++)
print_item(list, items[i * 3], items[i * 3 + 1], status[i], i, i == choice, DREF(ditems, i));
wnoutrefresh(list);
print_arrows(dialog, scroll, list_height, item_no, box_x, box_y, check_x + 4, cur_x, cur_y);
display_helpline(dialog, height-1, width);
x = width/ 2 - 11;
y = height - 2;
if (ditems && result) {
cancelButton = toupper(ditems[CANCEL_BUTTON].prompt[0]);
print_button(dialog, ditems[CANCEL_BUTTON].prompt, y, x + strlen(ditems[OK_BUTTON].prompt) + 5,
ditems[CANCEL_BUTTON].checked ? ditems[CANCEL_BUTTON].checked(&ditems[CANCEL_BUTTON]) : FALSE);
okButton = toupper(ditems[OK_BUTTON].prompt[0]);
print_button(dialog, ditems[OK_BUTTON].prompt, y, x,
ditems[OK_BUTTON].checked ? ditems[OK_BUTTON].checked(&ditems[OK_BUTTON]) : TRUE);
}
else {
cancelButton = 'C';
print_button(dialog, "Cancel", y, x + 14, FALSE);
okButton = 'O';
print_button(dialog, " OK ", y, x, TRUE);
}
wrefresh(dialog);
while (key != ESC) {
key = wgetch(dialog);
/* See if its the short-cut to "OK" */
if (toupper(key) == okButton) {
if (ditems) {
if (result && ditems[OK_BUTTON].fire) {
int st;
WINDOW *save;
save = dupwin(newscr);
st = ditems[OK_BUTTON].fire(&ditems[OK_BUTTON]);
if (st & DITEM_RESTORE) {
touchwin(save);
wrefresh(save);
}
delwin(save);
}
}
else if (result) {
*result = '\0';
for (i = 0; i < item_no; i++) {
if (status[i]) {
strcat(result, items[i*3]);
break;
}
}
}
rval = 0;
key = ESC;
break;
}
/* Shortcut to cancel */
if (toupper(key) == cancelButton) {
if (ditems && result && ditems[CANCEL_BUTTON].fire) {
int st;
WINDOW *save;
save = dupwin(newscr);
st = ditems[CANCEL_BUTTON].fire(&ditems[CANCEL_BUTTON]);
if (st & DITEM_RESTORE) {
touchwin(save);
wrefresh(save);
}
delwin(save);
}
rval = 1;
key = ESC;
break;
}
/* Check if key pressed matches first character of any item tag in list */
for (i = 0; i < max_choice; i++)
if (toupper(key) == toupper(items[(scroll + i) * 3][0]))
break;
if (i < max_choice || (key >= '1' && key <= MIN('9', '0' + max_choice)) ||
KEY_IS_UP(key) || KEY_IS_DOWN(key) || key == ' ') {
if (key >= '1' && key <= MIN('9', '0' + max_choice))
i = key - '1';
else if (KEY_IS_UP(key)) {
if (!choice) {
if (scroll) {
/* Scroll list down */
getyx(dialog, cur_y, cur_x); /* Save cursor position */
if (list_height > 1) {
/* De-highlight current first item before scrolling down */
print_item(list, items[scroll*3], items[scroll*3 + 1], status[scroll], 0,
FALSE, DREF(ditems, scroll));
scrollok(list, TRUE);
wscrl(list, -1);
scrollok(list, FALSE);
}
scroll--;
print_item(list, items[scroll*3], items[scroll*3 + 1], status[scroll], 0,
TRUE, DREF(ditems, scroll));
wnoutrefresh(list);
print_arrows(dialog, scroll, list_height, item_no, box_x, box_y, check_x + 4, cur_x, cur_y);
wrefresh(dialog);
}
continue; /* wait for another key press */
}
else
i = choice - 1;
}
else if (KEY_IS_DOWN(key)) {
if (choice == max_choice - 1) {
if (scroll + choice < item_no - 1) {
/* Scroll list up */
getyx(dialog, cur_y, cur_x); /* Save cursor position */
if (list_height > 1) {
/* De-highlight current last item before scrolling up */
print_item(list, items[(scroll + max_choice - 1) * 3],
items[(scroll + max_choice - 1) * 3 + 1],
status[scroll + max_choice - 1], max_choice - 1,
FALSE, DREF(ditems, scroll + max_choice - 1));
scrollok(list, TRUE);
scroll(list);
scrollok(list, FALSE);
}
scroll++;
print_item(list, items[(scroll + max_choice - 1) * 3],
items[(scroll + max_choice - 1) * 3 + 1],
status[scroll + max_choice - 1], max_choice - 1,
TRUE, DREF(ditems, scroll + max_choice - 1));
wnoutrefresh(list);
print_arrows(dialog, scroll, list_height, item_no, box_x, box_y, check_x + 4, cur_x, cur_y);
wrefresh(dialog);
}
continue; /* wait for another key press */
}
else
i = choice + 1;
}
else if (key == ' ') { /* Toggle item status */
if (status[scroll + choice])
continue;
else if (ditems) {
if (ditems[scroll + choice].fire) {
int st;
WINDOW *save;
save = dupwin(newscr);
st = ditems[scroll + choice].fire(&ditems[scroll + choice]);
if (st & DITEM_RESTORE) {
touchwin(save);
wrefresh(save);
}
delwin(save);
if (st & DITEM_REDRAW) {
wclear(list);
for (i = 0; i < item_no; i++)
status[i] = ditems[i].checked ? ditems[i].checked(&ditems[i]) : FALSE;
for (i = 0; i < max_choice; i++) {
print_item(list, items[(scroll + i) * 3], items[(scroll + i) * 3 + 1],
status[scroll + i], i, i == choice,
DREF(ditems, scroll + i));
}
wnoutrefresh(list);
wmove(dialog, cur_y, cur_x); /* Restore cursor to previous position */
wrefresh(dialog);
}
if (st & DITEM_LEAVE_MENU) {
/* Allow a fire action to take us out of the menu */
key = ESC;
break;
}
else if (st & DITEM_RECREATE) {
delwin(list);
delwin(dialog);
dialog_clear();
goto draw;
}
}
for (i = 0; i < item_no; i++)
status[i] = ditems[i].checked ? ditems[i].checked(&ditems[i]) : FALSE;
}
else {
for (i = 0; i < item_no; i++)
status[i] = 0;
status[scroll + choice] = TRUE;
}
getyx(dialog, cur_y, cur_x); /* Save cursor position */
for (i = 0; i < max_choice; i++)
print_item(list, items[(scroll + i) * 3], items[(scroll + i) * 3 + 1],
status[scroll + i], i, i == choice, DREF(ditems, scroll + i));
wnoutrefresh(list);
wmove(dialog, cur_y, cur_x); /* Restore cursor to previous position */
wrefresh(dialog);
continue; /* wait for another key press */
}
if (i != choice) {
/* De-highlight current item */
getyx(dialog, cur_y, cur_x); /* Save cursor position */
print_item(list, items[(scroll + choice) * 3], items[(scroll + choice) * 3 +1],
status[scroll + choice], choice, FALSE, DREF(ditems, scroll + choice));
/* Highlight new item */
choice = i;
print_item(list, items[(scroll + choice) * 3], items[(scroll + choice) * 3 + 1],
status[scroll + choice], choice, TRUE, DREF(ditems, scroll + choice));
wnoutrefresh(list);
wmove(dialog, cur_y, cur_x); /* Restore cursor to previous position */
wrefresh(dialog);
}
continue; /* wait for another key press */
}
switch (key) {
case KEY_PPAGE:
if (scroll > height-4) /* can we go up? */
scroll -= (height-4);
else
scroll = 0;
redraw_menu = TRUE;
break;
case KEY_NPAGE:
if (scroll + list_height >= item_no-1 - list_height) { /* can we go down a full page? */
scroll = item_no - list_height;
if (scroll < 0)
scroll = 0;
}
else
scroll += list_height;
redraw_menu = TRUE;
break;
case KEY_HOME:
scroll = 0;
choice = 0;
redraw_menu = TRUE;
break;
case KEY_END:
scroll = item_no - list_height;
if (scroll < 0)
scroll = 0;
choice = max_choice - 1;
redraw_menu = TRUE;
break;
case KEY_BTAB:
case TAB:
case KEY_LEFT:
case KEY_RIGHT:
button = !button;
if (ditems && result) {
print_button(dialog, ditems[CANCEL_BUTTON].prompt, y, x + strlen(ditems[OK_BUTTON].prompt) + 5,
ditems[CANCEL_BUTTON].checked ? ditems[CANCEL_BUTTON].checked(&ditems[CANCEL_BUTTON]) : button);
print_button(dialog, ditems[OK_BUTTON].prompt, y, x,
ditems[OK_BUTTON].checked ? ditems[OK_BUTTON].checked(&ditems[OK_BUTTON]) : !button);
}
else {
print_button(dialog, "Cancel", y, x + 14, button);
print_button(dialog, " OK ", y, x, !button);
}
wrefresh(dialog);
break;
case '\r':
case '\n':
if (ditems) {
if (result && ditems[button ? CANCEL_BUTTON : OK_BUTTON].fire) {
int st;
WINDOW *save;
save = dupwin(newscr);
st = ditems[button ? CANCEL_BUTTON : OK_BUTTON].fire(&ditems[button ? CANCEL_BUTTON : OK_BUTTON]);
if (st & DITEM_RESTORE) {
touchwin(save);
wrefresh(save);
}
delwin(save);
}
}
else if (result) {
*result = '\0';
for (i = 0; i < item_no; i++) {
if (status[i]) {
strcpy(result, items[i*3]);
break;
}
}
}
rval = button;
key = ESC;
break;
case ESC:
rval = -1;
break;
case KEY_F(1):
case '?':
display_helpfile();
break;
}
if (redraw_menu) {
for (i = 0; i < max_choice; i++)
print_item(list, items[(scroll + i) * 3], items[(scroll + i) * 3 + 1], status[scroll + i],
i, i == choice, DREF(ditems, scroll + i));
wnoutrefresh(list);
print_arrows(dialog, scroll, list_height, item_no, box_x, box_y, check_x + 4, cur_x, cur_y);
wrefresh(dialog);
redraw_menu = FALSE;
}
}
delwin(list);
delwin(dialog);
return rval; /* ESC pressed */
}
/*
* Print list item
*/
static void
print_item(WINDOW *win, char *tag, char *item, int status, int choice, int selected, dialogMenuItem *me)
{
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%c%c", me && me->lbra ? me->lbra : '(',
status ? me && me->mark ? me->mark : '*' : ' ',
me && me->rbra ? me->rbra : ')');
wattrset(win, menubox_attr);
waddch(win, ' ');
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);
/* If have a selection handler for this, call it */
if (me && me->selected) {
wrefresh(win);
me->selected(me, selected);
}
}
/* End of print_item() */