# Script show tag merging behavior with an option set in the 
#  option database. 
#
#   Should display with one row hightlighted red and a cell in the row left-justified
use Tk;
use Tk::TableMatrix;
use strict;
my $mw = MainWindow->new;
#$mw->optionAdd('*background', 'blue', 'interactive');
$mw->optionAdd('*tablematrix*background', 'skyblue');
my $table = $mw->TableMatrix(-rows => 5,
                            -cols => 8,
                            -cache => 1,
                            #-bg => 'blue',
                            );                
$table->pack(-expand => 1, -fill => 'both');
foreach my $row (0..4) {
     #$table->tagRow('invalid', $row);                # swap
     foreach my $column (0..7) {
       $table->set("$row,$column", "hello");
             #$table->tagCell('left', "$row,$column");    # swap
   }
}
# 'invalid' tag takes priority of 'left' tag, because it is created first, 
#     so the cell 2,3 should be red and center anchored, but see below...
$table->tagConfigure("invalid", -background => 'red', -anchor => 'center');
$table->tagConfigure("left",    -background => 'green', -anchor => 'w');
$table->tagCell('left', '2,3');
$table->tagRow('invalid', 2);
#  The tag priority is changed, so the cell 2,3 will be gree and 'w' achored.
$table->tagRaise('left', 'invalid');
# This would have the same effect as the above tagRaise
#$table->tagLower('invalid', 'left');
MainLoop;