some tips (i don't know what they are)

#!/usr/bin/perl --
use strict;
use warnings;
use Tk;
use Data::Dump qw/ dd pp /;
my $mw = tkinit(qw/ -width 30 -height 30 /);
my $t = $mw->Text->pack(qw/ -expand 1 -fill both /);
$t->insert('end',
q{"There must be some kind of way out of here,"
Said the joker to the thief.
"There's too much confusion,
I can't get no relief.
Businessmen, they drink my wine,
Plowmen dig my earth.
None of them along the line
Know what any of it is worth."
"No reason to get excited,"
The thief he kindly spoke.
"There are many here among us
Who feel that life is but a joke.
But you and I, we've been through that,
And this is not our fate.
So let us not talk falsely now,
The hour is getting late."
All along the watchtower,
Princes kept the view,
While all the women came and went --
Barefoot servants too.
Outside in the cold distance,
A wildcat did growl.
Two riders were approaching, and
The wind began to howl. 

http://www.reasontorock.com/tracks/watchtower.html
});
$t->tagConfigure('yellow', -background => "yellow");

my $b = $mw->Button(
    -text    => 'dlineinfo',
    -command => [
        sub {
            my( $mw, $t ) = @_;
            ffd( $mw, $t, qw/ 1.20  2.12  12.30  15.28    22.16 24.20 
+/);
        },
        $mw,
        $t,
    ],
)->pack( -before => $t );
$b->focus;
#~ use Tk::WidgetDump; $mw->WidgetDump;
MainLoop();
sub ffff {
    my( $mw, $t ) = @_;
    my $geom = $mw->geometry;
    my( $trooty, $theight ) = ( $t->rooty, $t->height );
    my $ttaily = $trooty + $theight;
    "mw(geo{$geom}) trooty($trooty)+theight($theight)= $ttaily";
}
sub ffd {
    my( $mw, $t ) = splice @_,0,2;
    print "\n", ffff( $mw, $t ), "\n";
    for my $index( @_ ){
        $t->tagAdd('yellow', "$index wordstart", "$index wordend", );
        my @aline = qw/ lTx lTy wpx hpx bsT /;
        my @dline = $t->dlineinfo("$index wordstart");
        my $theword = $t->get( "$index wordstart", "$index wordend" );
        if( not @dline ){
            print "($index $theword) SKIP not visible\n";
            next;
        }
        printf "%-10s %-10s %5s %-5s %5s %-5s %5s %-5s %5s %-5s %5s %-
+5s\n",
            $index,
            $theword,
            map { $aline[$_], $dline[$_]     } 0 .. $#aline,
        ;;;;;
        
        my @bbLine = qw/ lTx lTy lTw lTh /;
        my( @bbLineStart )  = $t->bbox("$index linestart" );
        my( @bbLineEnd )    = $t->bbox("$index lineend" );
        printf "%-10s %-10s %5s %-5s %5s %-5s %5s %-5s %5s %-5s %5s %-
+5s\n",,
            $index,
            'end',
            ( map { $bbLine[$_], $bbLineEnd[$_]     } 0 .. $#bbLine,),
            ('') x 2,
        ;;;;;
        printf "%-10s %-10s %5s %-5s %5s %-5s %5s %-5s %5s %-5s %5s %-
+5s\n",
            $index,
            'start',
            ( map { $bbLine[$_], $bbLineEnd[$_]     } 0 .. $#bbLine,),
            ('') x 2,
        ;;;;;
        print "\n";
    }
#~     my $width = (200,400,600)[rand 2];
#~     $mw->geometry( $width."x$width");
}
__END__
[download]

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