My thanks to zentara, anonymous monk and stefbv for taking time to respond to my questions. I had problems with my internet connection. So couldn't respond earlier. Anyway, from your responses, I now understand,


1. perldoc Tk::bind under section: BINDING CALLBACKS AND SUBSTITUTIONS list all the fields that are accessible to a Perl/Tk programmer from XEvent object

2. The symbol @ in selectionIncludes('@' . $Ev->x.",".$Ev->y) has no special meaning but only what it is literally in spoken English (ie. @ simply means "at" and nothing to with array data type) I hope this understanding of mine is correct.

However, I'm still having difficulty in understanding three lines of the code in http://perlmonks.com/?node_id=840707 viz:
1. $w->selectionIncludes( '@' . $Ev->x . "," . $Ev->y )
2. $w->selectionSet( '@' . $Ev->x . "," . $Ev->y )
3. my ($rc) = @{ $w->curselection };

As I've no background knowledge of pure Tcl/Tk, I'm unable to undertand what is said in the perldoc on Tk::TableMatrix with respect to these three selection methods. Can you folks please let me know what do these lines do (and how does it highlight the row and clicking on it retrieves the row number) from a Perl/Tk programmer perspective.

The line @{ $w->curselection } is baffling for me. Also commenting out the binding for <FocusOut> event doesn't appear to affect the program. Why is this so ?

Thanks in advance.

In reply to Re^2: A TableMatrix row selection question by Anonymous Monk
in thread A TableMatrix row selection question by Anonymous Monk

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