From a DejaGoo search (by Slaven Rezic):

Tk has already mouse wheel support, however, there is no binding in
perl/Tk. If you want to make Text or Listbox widgets
mouse-wheel-aware, you can use the method below (borrowed from the
Tcl/Tk library), e.g. $text->BindMouseWheel. Note that I changed the
scrolling delta from the original 4 or 5 lines to 3 (which seems to
match the behaviour on my NT machine).

# not yet tested on Unix
sub Tk::Widget::BindMouseWheel {
    my($w) = @_;

    # The MouseWheel will typically only fire on Windows.  However,
    # someone could use the "event generate" command to produce one
    # on other platforms.

    $w->bind('<MouseWheel>',
              [ sub { $_[0]->yview('scroll',-($_[1]/120)*3,'units') },
+ Tk::Ev("D")]);

    if ($Tk::platform eq 'unix') {
        # Support for mousewheels on Linux/Unix commonly comes through
+ mapping
        # the wheel to the extended buttons.  If you have a mousewheel
+, find
        # Linux configuration info at:
        #   http://www.inria.fr/koala/colas/mouse-wheel-scroll/
        $w->bind('<4>',
                 sub { $_[0]->yview('scroll', -3, 'units')
                           unless $Tk::strictMotif;
                   });
        $w->bind('<5>',
                 sub { $_[0]->yview('scroll', 3, 'units')
                           unless $Tk::strictMotif;
                   });
    }
}

[download]

In reply to Re: Tk scrolling and mouse wheel by bikeNomad
in thread Tk scrolling and mouse wheel by John M. Dlugosz

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.