Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Here is a code example, not from my code base but from monk tybalt89's response to one of my earlier questions. The problem is generic enough.
Noticable in this example is that the code up till Mainloop is actually quite fast, but then it takes a couple of seconds until the whole GUI is drawn.
#!/usr/bin/perl use strict; # use warnings; use Tk; use Tk::Pane; my ($rows, $columns) = (70, 20); my $sbsize = 22; my $mw = MainWindow->new(); # example of ->pack in a different Frame my $buttonbar = $mw->Frame(-bg => 'blue', )->pack(-fill => 'x'); $buttonbar->Button(-text => 'Exit', -command => sub{$mw->destroy}, )->pack(-side => 'right', -fill => 'x', -expand => 1); $buttonbar->Button(-text => 'Set Size', -command => \&setsize, )->pack(-side => 'right', -fill => 'x', -expand => 1); $buttonbar->Button(-text => 'Remove Column', -command => sub{$columns--; changegrid(); setsize(); }, )->pack(-side => 'right', -fill => 'x', -expand => 1); $buttonbar->Button(-text => 'Add Column', -command => sub{$columns++; changegrid(); setsize(); }, )->pack(-side => 'right', -fill => 'x', -expand => 1); $buttonbar->Button(-text => 'Remove Row', -command => sub{$rows--; changegrid(); setsize(); }, )->pack(-side => 'right', -fill => 'x', -expand => 1); $buttonbar->Button(-text => 'Add Row', -command => sub{$rows++; changegrid(); setsize(); }, )->pack(-side => 'right', -fill => 'x', -expand => 1); my ($screenw, $screenh) = ($mw->screenwidth, $mw->screenheight); print "w $screenw h $screenh\n"; $mw->maxsize($screenw, $screenh); #$mw->maxsize(1000,1200); #$mw->minsize(400,300); my $scroll = $mw->Scrolled('Pane', -scrollbars => 'osoe', -sticky => 'news', )->pack(-expand => 1, -fill => 'both'); my $f = $scroll->Frame->pack(-expand => 1, -fill => 'both'); changegrid(); $mw->update; setsize(); MainLoop; -M $0 < 0 and exec $0; # FIXME for testing sub setsize { $mw->update; my( $mwh, $sh, $fh) = map $_->height, $mw, $scroll, $f; my( $mww, $sw, $fw) = map $_->width, $mw, $scroll, $f; my( $mwrh, $srh, $frh) = map $_->reqheight, $mw, $scroll, $f; my( $mwrw, $srw, $frw) = map $_->reqwidth, $mw, $scroll, $f; my $deltaheight = $sh - $frh; my $deltawidth = $sw - $frw; print "height $mwh $mwrh $sh $srh $fh $frh\n"; print " width $mww $mwrw $sw $srw $fw $frw\n"; print "delta h $deltaheight w $deltawidth\n"; my $geo = $mw->geometry; my ($w, $h) = split /\D/, $geo; my $newgeo = ($w - $deltawidth + $sbsize + 10) . 'x' . ($h - $deltaheight + $sbsize); print "old $geo new $newgeo\n"; $mw->geometry( $newgeo ); } sub changegrid { $_->destroy for $f->children; foreach my $row (0..$rows - 1) { foreach my $col (0..$columns - 1) { $f->Entry( -text => "rc $row $col", -width => 0, )->grid(-row => $row, -column => $col, -sticky => 'news'); $row or $f->gridColumnconfigure($col, -weight => 1); } $f->gridRowconfigure($row, -weight => 1); } }

In reply to Re^2: Tk performance and "UpdateWrapper: Failed to create container" by olgo
in thread Tk performance and "UpdateWrapper: Failed to create container" by olgo

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

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?

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

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (6)
As of 2022-09-30 07:15 GMT
Find Nodes?
    Voting Booth?
    I prefer my indexes to start at:

    Results (125 votes). Check out past polls.