These are short questions and I hope, are simple ones

  1. In the following code, I attempt to activate the topmost cell on the left so that the arrow keys (Left, Right, Up and Down) can be used for right away browsing the cells in TableMatrix without prior having to select the cell by the mouse button click. But neither of the methods: ( activate , selectionSet ) work.

  2. Calling the methods do however, highlight the cell. The activate method causes the cell to get highlighted with grey color but the selectionSetmethod with blue color. Don't know why is the difference in color.

  3. As an aside, I'll squeeze in one more question. I've seen zentara (no longer active on this site) in Re: Increase The coloumn size in Perl Tk? using negative column indexes while setting column width. 
     $t->colWidth( -2 => 8, -1 => 9, 0=> 12,  4=> 14);

    [download]
         As per documentation, the value specified for setting the width can be negative (for pixels instead of positive for characters). But what do the negative value for column index refer to ?

Thanks in advance.

use strict;
use warnings;
use Tk;
use Tk::TableMatrix;


my $mw = MainWindow->new;

my $tm = $mw->Scrolled('TableMatrix', 
        -rows => 5, 
        -cols => 10,
        -width => 5, 
        -height => 12,
        -selecttitles => 0,
        -bg=>'yellow',
        -drawmode => 'slow',
                )->pack(-expand => 1, -fill => 'both');
                

$tm->activate("topleft");
#$tm->selectionSet("2,3");                

MainLoop;

[download]

In reply to activate and selectionSet methods, negative columns in TableMatrix by Anonymous Monk

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