Last week I posted a query about the way a using the mouse button and key board up, down left and right keys gave different results in the browse command of a tablematrix.
I have now heard from John Cerny, the author of the tablematrix, of how to use an afterIdle call to get consistent behavior.
I have added this to the Perl code below in case another Monk may want to use the same facilities.

use Tk;
use Tk::TableMatrix;
my $mw = MainWindow->new;
my $arrayVar = {};
my $selcou = 0;
my $last_button_key;
print "Filling Array...\n";
my ($rows,$cols) = (10, 10);
 foreach my $row  (0..($rows-1)){
    foreach my $col (0..($cols-1)){
      $arrayVar->{"$row,$col"} = 2*$row + 3*$col;
   }
}
print "Creating Table...\n";
 my $t = $mw->Scrolled('TableMatrix', -rows => $rows, -cols => $cols,
 -width => 10, -height => 10,
 -titlerows => 1, -titlecols => 1,
 -variable => $arrayVar,
 -coltagcommand => \&colSub,
 -browsecommand => \&brscmd,
 -colstretchmode => 'last',
 -rowstretchmode => 'last',
 -selectmode => 'extended',
 -selecttitles => 0,
 -drawmode => 'slow',
 -scrollbars=>'se'
 );

$t->pack(-expand => 1, -fill => 'both');


sub brscmd_old {
my ($previous_index, $actual_index) = @_;
my ($row, $col) = split ',', $actual_index;
my ($sel, $js, $sel_total);

print "\n[brscmd] entry - last_button_key <$last_button_key>\n";

my $sel =  $t->curselection();

$sel_cou += 1;

#$t->curselection($sel_cou)

#&TMRefresh($t);

$sel_total = scalar(@$sel);

print "[brscmd] selection total <$sel_total>\n";


foreach $js (@$sel) {
    print "\n[brscmd] actual index <$actual_index> from curselection <
+$js>\n";
}

print "\n[brscmd] exit\n";
}


sub brscmd {

        my ( $previous_index, $actual_index ) = @_;

        my ( $row, $col ) = split ',', $actual_index;
        my ( $sel, $js );        

print "\n[brscmd] entry\n";

        $t->afterIdle( sub{
                my $sel = $t->curselection();
                foreach $js (@$sel) {
                        print "[brscmd] actual index <$actual_index> f
+rom curselection <$js> last_button_key <$last_button_key>\n";
                }
        }
        );
}


#########################################
sub TMRefresh {
    #Required input TableMatrix object.
    #use to force matrix to update, a code trick
    return if (!$_[0]);
    $_[0]->configure(-padx =>($_[0]->cget(-padx)));

}   


$t->bind('<KeyPress>' =>\&print_keysym);

$t->bind('<ButtonPress-1>' =>\&print_button1);
$t->bind('<ButtonPress-2>' =>\&print_button2);

sub print_keysym{
    my($widget) = @_;
    my $e = $widget->XEvent;
    my($keysym_text, $keysym_decimal) = ($e->K, $e->N);
    print "[print_keysym] Keysym = $keysym_text  numeric $keysym_decim
+al\n";
    $last_button_key = 'key';
}

sub print_button1{
my($widget) = @_;

    print "[print_button1] button 1 pressed\n";
    $last_button_key = 'button 1';
}

sub print_button2{
my($widget) = @_;

    print "[print_button2] button 2 pressed\n";
    $last_button_key = 'button 2';
}
Tk::MainLoop;
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