old-www/HOWTO/NCURSES-Programming-HOWTO/ncurses_programs/perl/10.pl

99 lines
1.6 KiB
Perl
Executable File

#!/usr/bin/perl
#
# Copyright (C) 2003 by Virtusa Corporation
# http://www.virtusa.com
#
# Anuradha Ratnaweera
# http://www.linux.lk/~anuradha/
#
use Curses;
$width = 30;
$height = 10;
$startx = 0;
$starty = 0;
@choices = (
"Choice 1",
"Choice 2",
"Choice 3",
"Choice 4",
"Exit"
);
$n_choices = @choices;
$highlight = 1;
$choice = 0;
initscr();
clear();
noecho();
cbreak();
$startx = ($COLS - $width) / 2;
$starty = ($LINES - $height) / 2;
$menu_win = newwin($height, $width, $starty, $startx);
keypad(1);
keypad($menu_win, 1);
addstr(0, 0, "Use arrow keys to go up and down, Press enter to select a choice");
refresh();
print_menu($menu_win, $highlight);
while (1) {
$c = getch($menu_win);
if ($c == KEY_UP) {
if ($highlight == 1) {
$highlight = $n_choices;
}
else {
$highlight--;
}
}
elsif ($c == KEY_DOWN) {
if ($highlight == $n_choices) {
$highlight = 1;
}
else {
$highlight++;
}
}
elsif ($c == '\n') {
$choice = $highlight;
}
else {
addstr($LINES - 2, 0, "Character pressed is $c");
refresh();
}
print_menu($menu_win, $highlight);
last if ($choice);
}
addstr($LINES - 2, 0, "You chose choice $choice with choice string $choices[$choice-1]");
clrtoeol();
refresh();
endwin();
sub print_menu {
$menu_win = shift;
$highlight = shift;
$x = 2;
$y = 2;
box($menu_win, 0, 0);
for ($i = 0; $i < $n_choices; $i++) {
if ($highlight == $i + 1) {
attron($menu_win, A_REVERSE);
addstr($menu_win, $y, $x, $choices[$i]);
attroff($menu_win, A_REVERSE);
}
else {
addstr($menu_win, $y, $x, $choices[$i]);
}
$y++;
}
refresh($menu_win);
}