Here is a simple example of using find with tags. Hope it sheds some light for you. Canvas tags are a very powerful tool, and the secret to using the Canvas successfully. 
#!/usr/bin/perl -w
use strict;
use Tk;

my ($x, $y);
my $iconSize = 20;
my ($width, $height) = (10, 10);
my ($canvasWidth, $canvasHeight) = ($iconSize+$width*$iconSize,
                    $iconSize+$height*$iconSize);

my $MW = MainWindow->new;
my $MF = $MW->Frame->pack;
my $c = $MF->Canvas( -width => $canvasWidth,
            -height => $canvasHeight )->pack;

for ($y = $iconSize; $y < $canvasHeight; $y+=$iconSize)
{
    for ($x = $iconSize; $x < $canvasWidth; $x+=$iconSize)
    {
        my $rect = $c->createRectangle ($x, $y,
                         $x+$iconSize, $y+$iconSize,
                     -fill => '#AFAFAF',
                     -activefill => '#CFCFCF',
                         -tags =>['rect',"row.$y", "col.$x"]
                     );
        
    }
}

$c->bind('rect', '<Enter>', \&enter );

$c->bind("rect", "<Leave>", \&leave );

MainLoop;

sub enter {
  my ($canv) = @_;
  my $id = $canv->find('withtag', 'current');
  my @tags = $canv->gettags($id);
#  print "@tags\n";
  # row.20 col.140 current

  my ($row) = ( grep /^row\d*/, @tags );
  my ($col) = ( grep /^col\d*/, @tags );

  my(@rows) = $canv->find('withtag', $row);  
  my(@cols) = $canv->find('withtag', $col);  

  foreach my $r(@rows){
       $canv->itemconfigure($r, -fill=>'#CFCFCF')
      }

  foreach my $c(@cols){
       $canv->itemconfigure($c, -fill=>'#CFCFCF')
      }
}

sub leave{
  my ($canv) = @_;
#  print "leave\n";
  $canv->itemconfigure('all', -fill=>'#AFAFAF')
}

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I'm not really a human, but I play one on earth.
Old Perl Programmer Haiku ................... flash japh

In reply to Re: How do I get "coords" of multiple polygons with the same "tag" by zentara
in thread How do I get "coords" of multiple polygons with the same "tag" by smh

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