I have another Mousewheel question related to Tk::BrowseEntry.
On Linux when the pop-up listbox has a scrollbar, I can use the mousewheel to scroll the listbox without having to define any new bindings.
On Windows (Strawberry Perl) this does not work. The mousewheel does nothing.

So I have been trying to set up the binding myself but despite trying various subwidget targets (all those commented out in the example below) I haven't managed to get the mousewheel to scroll the listbox on Windows.

Does anybody know what the correct binding for this is?

#!/usr/bin/perl
use strict;
use warnings;
use Tk;
use Tk::BrowseEntry;

my $mw=tkinit();
my $var='opt2';
my $b=$mw->BrowseEntry(-label      => "Choose:",
                       -variable   => \$var,
                       -style      => 'MSWin32',
                       -listheight => 5,
                       -browsecmd  => sub{ print STDOUT $var."\n" }
);
$b->insert("end", "opt1");
$b->insert("end", "opt2");
$b->insert("end", "opt3");
$b->insert("end", "opt4");
$b->insert("end", "opt5");
$b->insert("end", "opt6");
$b->insert("end", "opt7");
$b->insert("end", "opt8");
$b->insert("end", "opt9");
$b->insert("end", "optA");
$b->insert("end", "optB");
$b->insert("end", "optC");

#my $lbx=$b->Subwidget("slistbox")->Subwidget("yscrollbar");
#my $lbx=$b->Subwidget("slistbox")->Subwidget("scrolled");
#my $lbx=$b->Subwidget("slistbox")->Subwidget("listbox");
#my $lbx=$b->Subwidget("choices");
my $lbx=$b->Subwidget("slistbox");
$lbx->bind('<MouseWheel>',[sub{$_[0]->yview('scroll',-($_[1]/120)*3,'u
+nits')}, Ev("D")]);
$b->pack;

MainLoop;

[download]

In reply to Tk::BrowseEntry listbox scrollbar with Mousewheel on Windows by perltux

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.