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Win32::GUI::Grid SetCellData setting and getting data problem

by kelchris (Novice)
on Jan 26, 2012 at 17:32 UTC ( #950177=perlquestion: print w/replies, xml ) Need Help??
kelchris has asked for the wisdom of the Perl Monks concerning the following question:

Hey there,

I really can't get SetCellData and GetCellData to work properly.

my $sku = "BR123123"; $grid->SetCellData(1,1,$sku);
But:
SetCellData (nRow, nCol, lParam) from http://perl-win32-gui.sourceforge.net/cgi-bin/docs.cgi?doc=grid

So how do I convert $sku to lParam? And how can I convert that lParam I get from GetCellData to the actual data I set?

I have tried converting sku:
$sku = unpack("L", pack('p', $sku));
then:
$table->SetCellData(1,1,$sku);

But $table->GetCellData(1,1) isn't returning my $sku value

The reason I am using SetCellData is to trace where the rows move after sorting

Any help would be appreciated, thanks!

Thanks

Replies are listed 'Best First'.
Re: Win32::GUI::Grid SetCellData setting and getting data problem
by kelchris (Novice) on Jan 26, 2012 at 18:36 UTC
    Just found out that setting $table->SetCellData(1,1,$sku); on another block would cause the $sku to disappear for some reason.

    Setting $sku to a temporary global variable and using that variable in $table->SetCellData(1,1,$globalVar) did the trick.

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Node Type: perlquestion [id://950177]
Approved by Corion
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[Eily]: you could tie a variable into not having the same value each time, if you like to make people who try to debug your code facepalm
[Corion]: perl -wle 'package o; use overload q("") => sub {warn "str"; ""}, bool => sub{warn "bool"; 1}; package main; my $o={}; bless $o => o; print "Yay" if ($o && !length($o))'
[Corion]: But people writing such code should document the objects they construct and why it makes sense for an object to be invisible as string while being true in a boolean context
[hippo]: That's equal parts clever and horrendous.
[Eily]: the overload version wouldn't return true with "$x" && !length $x though, I guess
[hippo]: The more I look at this code, the more $x is a plain old scalar and the more this condition will never be true. I'm calling it a bug at this point.
[hippo]: Thanks for your input which has soothed my sanity (a little)
[Corion]: Eily: Sure - if you force both things into stringy things, then you break that magic. But that would also mean that you changed the expression, as now $x = 0.00 will be true instead of false as it were before
[Corion]: Ah no, at least in my feeble experiments that doesn't change the meaning
[Corion]: We sell sanity in small packages ;)

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