Dear fellow Monks,

I'm trying to write a Tk UI where text widgets autoexpand to have the necessary height to show all text. I haven't been able to find any way of determining how many lines high the text widget needs to be to accomodate the contained text in full view.

Here is some code, modified from an example in the "Mastering Perl/Tk" book from O'Reilly, where I've been experimenting with the yview and index methods. Still that path will not shrink the text widget when text is short

use Tk;

$mw= MainWindow->new;
$mw->title('sadfa');
$f = $mw->Frame->pack(-side=>'bottom');
$f->Button(-text=>'Print',-command=>\&print_info)->pack(-side=>'left')
+;
$t=$mw->Scrolled("Text", -width=>40, -wrap=>'none')->pack(-expand=>1, 
+-fill=>'both');
@widget_list = ();
$long_text = "text1 text1 text1 text1 text1 text1 text1 text1 text1 te
+xt1 ";
foreach ($long_text,"text2", "text3", "text4") {
    $w= $t->Text( -width=>20, -height=>2);
    $w->insert('end',$_);
    $t->windowCreate('end',-window=>$w);
    $t->insert('end', "\n");
    push @widget_list, $w;
}

sub print_info {
    foreach my $text (@widget_list) {
        
    print join "  ", $text->yview;
    print "\n";
    my $index = $text->index('end');
    print qq§ index : $index \n§;
    }
print "----------\n";
}
MainLoop;

[download]
/jeorgen

In reply to How do I count wrapped lines in TK.::Text? by jeorgen

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.