Is there a method to have Tk::Optionmenu start displaying the option list without having the user first click the button?

Yes, generate a tk event, or call the appropriate Tk::Optionmenu method directly, Tk::WidgetDump might help you figure stuff out

or, use a widget other than Tk::Optionmenu, maybe a Tk::Listbox or something else, like a frame or panel of buttons that you create

Question 2: Why does the Optionmenu callback function (localCall below) get called before the user click of Optionmenu button?

What does the documentation say about it? https://metacpan.org/pod/Tk::Optionmenu#command

I would assume because the Tk::Optionmenu calls it, because its written that way :) ... and this is probably a bug but it might be a feature; -options is loaded and a default option is selected after the -command is bound ... so the -command callback gets invoked

Please look at my workaround.

Yup, akward :) I don't recognize any part of the program as a workaround

In each callback you can use $Tk::event and $Tk::widget ... combine with ->parent, and no need for some of those closures

In reply to Re: Tk:::Optionmenu startup displaying the optionlist ( tk optionmenu bug , event generate) by Anonymous Monk
in thread Tk:::Optionmenu startup displaying the optionlist by Ray Smith

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.