Beefy Boxes and Bandwidth Generously Provided by pair Networks
more useful options
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??

Perhaps you need to run your system command as a background process? The problem is that when you run a system command that seizes control of the current process, the Tk event loop doesn't get executed, so no window updates occur. If you call external programs in their own process, it allows the Tk events some processing time.

See below: (Windows example, adjust as necessary to call background processes in your OS)

use strict; use warnings; use Tk; my $mw = MainWindow->new; my $m = $mw->Message(-text => "testing, one, two, three...")->pack; $mw->update; system("start notepad.exe"); MainLoop;

For your sleep example? Well, if you don't call your event loop periodically, don't be surprised if your events don't get processed...


In reply to Re^3: Perl/Tk window contents disappear when obscured then revealed by thundergnat
in thread Perl/Tk window contents disappear when obscured then revealed by Another Ed

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others examining the Monastery: (15)
    As of 2014-07-14 17:08 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      When choosing user names for websites, I prefer to use:








      Results (269 votes), past polls