I think $key = ReadKey() is always returning individual bytes in $key. If so, you need to build up some context to match against. I.e., if the longest multicharacter sequence is 4 chars, you'd keep the last 4 bytes returned from ReadKey(). You can then compare this 4-byte string against the target sequence. If the sequence you're interested in is shorter, just compare against the last n bytes in the string.

For example, on my keyboard, where PgUp produces the sequence 1b 5b 35 7e, I could use the following snippet to react to this keypress: 

use Term::ReadKey;

my $buf = '';

ReadMode 4;  # raw mode

while (my $key = ReadKey()) {
    
    last if $key eq "q";      # quit loop

    $buf .= $key;
    $buf = substr($buf, -4);  # keep last 4 bytes
    
    # debug
    print unpack("H*", $buf), "\n";

    if ($buf eq "\x1b\x5b\x35\x7e") {     # \e[5~
        print "PgUp\n";
    }
    
}
ReadMode 0;  # reset tty

[download]

In reply to Re: using \x in regex by almut
in thread using \x in regex by halfcountplus

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.