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/*
* radiolist.c -- implements the radiolist box
*
* AUTHOR: Stuart Herbert - S.Herbert@sheffield.ac.uk
* (from checklist.c by Savio Lam (lam836@cs.cuhk.hk))
*
* 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 void print_item(WINDOW *win, char *tag, char *item, int status, int choice, int selected);
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(char *title, char *prompt, int height, int width, int list_height, int item_no, char **items)
{
int i, x, y, cur_x, cur_y, box_x, box_y, key = 0, button = 0, choice = 0,
scrolli = 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_radiolist().\n");
exit(-1);
}
/* Initializes status */
for (i = 0; i < item_no; i++)
status[i] = !strcasecmp(items[i*3 + 2], "on");
max_choice = MIN(list_height, item_no);
/* center dialog box on screen */
x = (COLS - width)/2;
y = (LINES - height)/2;
#ifdef HAVE_NCURSES
if (use_shadow)
draw_shadow(stdscr, y, x, height, width);
#endif
dialog = newwin(height, width, y, x);
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);
print_autowrap(dialog, prompt, width-2, 1, 3);
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);
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 = 0;
item_x = 0;
/* Find length of longest item in order to center radiolist */
for (i = 0; i < item_no; i++) {
check_x = MAX(check_x, strlen(items[i*3]) + strlen(items[i*3 + 1]) + 6);
item_x = MAX(item_x, strlen(items[i*3]));
}
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);
wnoutrefresh(list);
if (list_height < item_no) {
wattrset(dialog, darrow_attr);
wmove(dialog, box_y + list_height + 1, box_x + check_x + 5);
waddch(dialog, ACS_DARROW);
wmove(dialog, box_y + list_height + 1, box_x + check_x + 6);
waddstr(dialog, "(+)");
}
x = width/2-11;
y = height-2;
print_button(dialog, "Cancel", y, x+14, FALSE);
print_button(dialog, " OK ", y, x, TRUE);
wrefresh(dialog);
while (key != ESC) {
key = wgetch(dialog);
/* 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[(scrolli+i)*3][0]))
break;
if (i < max_choice || (key >= '1' && key <= MIN('9', '0'+max_choice)) ||
key == KEY_UP || key == KEY_DOWN || key == ' ' ||
key == '+' || key == '-' ) {
if (key >= '1' && key <= MIN('9', '0'+max_choice))
i = key - '1';
else if (key == KEY_UP || key == '-') {
if (!choice) {
if (scrolli) {
#ifdef BROKEN_WSCRL
/* wscrl() in ncurses 1.8.1 seems to be broken, causing a segmentation
violation when scrolling windows of height = 4, so scrolling is not
used for now */
scrolli--;
getyx(dialog, cur_y, cur_x); /* Save cursor position */
/* Reprint list to scroll down */
for (i = 0; i < max_choice; i++)
print_item(list, items[(scrolli+i)*3], items[(scrolli+i)*3 + 1], status[scrolli+i], i, i == choice);
#else
/* 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[scrolli*3], items[scrolli*3 + 1], status[scrolli], 0, FALSE);
scrollok(list, TRUE);
wscrl(list, -1);
scrollok(list, FALSE);
}
scrolli--;
print_item(list, items[scrolli*3], items[scrolli*3 + 1], status[scrolli], 0, TRUE);
#endif
wnoutrefresh(list);
/* print the up/down arrows */
wmove(dialog, box_y, box_x + check_x + 5);
wattrset(dialog, scrolli ? uarrow_attr : menubox_attr);
waddch(dialog, scrolli ? ACS_UARROW : ACS_HLINE);
wmove(dialog, box_y, box_x + check_x + 6);
waddch(dialog, scrolli ? '(' : ACS_HLINE);
wmove(dialog, box_y, box_x + check_x + 7);
waddch(dialog, scrolli ? '-' : ACS_HLINE);
wmove(dialog, box_y, box_x + check_x + 8);
waddch(dialog, scrolli ? ')' : ACS_HLINE);
wattrset(dialog, darrow_attr);
wmove(dialog, box_y + list_height + 1, box_x + check_x + 5);
waddch(dialog, ACS_DARROW);
wmove(dialog, box_y + list_height + 1, box_x + check_x + 6);
waddch(dialog, '(');
wmove(dialog, box_y + list_height + 1, box_x + check_x + 7);
waddch(dialog, '+');
wmove(dialog, box_y + list_height + 1, box_x + check_x + 8);
waddch(dialog, ')');
wmove(dialog, cur_y, cur_x); /* Restore cursor position */
wrefresh(dialog);
}
continue; /* wait for another key press */
}
else
i = choice - 1;
}
else if (key == KEY_DOWN || key == '+') {
if (choice == max_choice - 1) {
if (scrolli+choice < item_no-1) {
#ifdef BROKEN_WSCRL
/* wscrl() in ncurses 1.8.1 seems to be broken, causing a segmentation
violation when scrolling windows of height = 4, so scrolling is not
used for now */
scrolli++;
getyx(dialog, cur_y, cur_x); /* Save cursor position */
/* Reprint list to scroll up */
for (i = 0; i < max_choice; i++)
print_item(list, items[(scrolli+i)*3], items[(scrolli+i)*3 + 1], status[scrolli+i], i, i == choice);
#else
/* 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[(scrolli+max_choice-1)*3], items[(scrolli+max_choice-1)*3 + 1], status[scrolli+max_choice-1], max_choice-1, FALSE);
scrollok(list, TRUE);
scroll(list);
scrollok(list, FALSE);
}
scrolli++;
print_item(list, items[(scrolli+max_choice-1)*3], items[(scrolli+max_choice-1)*3 + 1], status[scrolli+max_choice-1], max_choice-1, TRUE);
#endif
wnoutrefresh(list);
/* print the up/down arrows */
wattrset(dialog, uarrow_attr);
wmove(dialog, box_y, box_x + check_x + 5);
waddch(dialog, ACS_UARROW);
wmove(dialog, box_y, box_x + check_x + 6);
waddstr(dialog, "(-)");
wmove(dialog, box_y + list_height + 1, box_x + check_x + 5);
wattrset(dialog, scrolli+choice < item_no-1 ? darrow_attr : menubox_border_attr);
waddch(dialog, scrolli+choice < item_no-1 ? ACS_DARROW : ACS_HLINE);
wmove(dialog, box_y + list_height + 1, box_x + check_x + 6);
waddch(dialog, scrolli+choice < item_no-1 ? '(' : ACS_HLINE);
wmove(dialog, box_y + list_height + 1, box_x + check_x + 7);
waddch(dialog, scrolli+choice < item_no-1 ? '+' : ACS_HLINE);
wmove(dialog, box_y + list_height + 1, box_x + check_x + 8);
waddch(dialog, scrolli+choice < item_no-1 ? ')' : ACS_HLINE);
wmove(dialog, cur_y, cur_x); /* Restore cursor position */
wrefresh(dialog);
}
continue; /* wait for another key press */
}
else
i = choice + 1;
}
else if (key == ' ') { /* Toggle item status */
if (!status[scrolli+choice])
{
for (i=0; i<item_no; i++)
status[i]=0;
status[scrolli+choice]=1;
getyx(dialog, cur_y, cur_x); /* Save cursor position */
for (i = 0; i < max_choice; i++)
print_item(list, items[(scrolli+i)*3], items[(scrolli+i)*3 + 1], status[scrolli+i], i, i == choice);
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[(scrolli+choice)*3], items[(scrolli+choice)*3 +1], status[scrolli+choice], choice, FALSE);
/* Highlight new item */
choice = i;
print_item(list, items[(scrolli+choice)*3], items[(scrolli+choice)*3 + 1], status[scrolli+choice], choice, TRUE);
wnoutrefresh(list);
wmove(dialog, cur_y, cur_x); /* Restore cursor to previous position */
wrefresh(dialog);
}
continue; /* wait for another key press */
}
switch (key) {
case 'O':
case 'o':
delwin(dialog);
for (i = 0; i < item_no; i++)
if (status[i])
fprintf(stderr, "%s", items[i*3]);
free(status);
return 0;
case 'C':
case 'c':
delwin(dialog);
free(status);
return 1;
case TAB:
case KEY_LEFT:
case KEY_RIGHT:
if (!button) {
button = 1; /* Indicates "Cancel" button is selected */
print_button(dialog, " OK ", y, x, FALSE);
print_button(dialog, "Cancel", y, x+14, TRUE);
}
else {
button = 0; /* Indicates "OK" button is selected */
print_button(dialog, "Cancel", y, x+14, FALSE);
print_button(dialog, " OK ", y, x, TRUE);
}
wrefresh(dialog);
break;
case ' ':
case '\n':
delwin(dialog);
if (!button)
for (i = 0; i < item_no; i++)
if (status[i])
fprintf(stderr, items[i*3]);
free(status);
return button;
case ESC:
break;
}
}
delwin(dialog);
free(status);
return -1; /* ESC pressed */
}
/* End of dialog_radiolist() */
/*
* Print list item
*/
static void print_item(WINDOW *win, char *tag, 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 ? '*' : ' ');
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);
}
/* End of print_item() */
|
