Re: [zzdev] Code Question - XANNI!

[Andrew Pam <xanni@xxxxxxxxxxxxxxxxx>]

On Sat, Oct 03, 1998 at 02:37:52AM +1000, Gossamer wrote:
> Xanni, you've stumped me.  Can you translate this into 
> simpler code?  My brain refuses to unravel the brackets
> today!

Well, I think I can give you an explanation.

> sub view_reset($)
> # Reset dimensions of given cursor
> {
>   my ($number) = @_;

This is the cursor number (0 for the "action" cursor, 1 for the "data" cursor)

>   my $curs = &get_cursor($number);

$curs is now the cell number of the cursor itself.

>   my $index = &get_nextcell($CURSOR_HOME, "+d.1"); # Dimension list

$index is now the cell number of the head of the dimension list.

>   $ZZ{$curs = $ZZ{"$curs+d.1"}} = "+$ZZ{$index}";

$curs is now moving along +d.1 to the cell containing the X dimension
of the cursor, and is being assigned poswards in the first dimension on
the dimension list.

>   $ZZ{$curs = $ZZ{"$curs+d.1"}} = "+" . $ZZ{$index = $ZZ{"$index+d.2"}};

$curs is now moving +d.1 again to the cell containing the Y dimension
of the cursor, and is being assigned poswards in the next dimension on
the dimension list.

>   $ZZ{$curs = $ZZ{"$curs+d.1"}} = "+" . $ZZ{$index = $ZZ{"$index+d.2"}};

$curs is now moving +d.1 again to the cell containing the Z dimension
of the cursor, and is being assigned poswards in the next dimension on
the dimension list.

>   $Window_Dirty[$number] = $TRUE;
> }

Finally we mark the affected window as dirty so it will redraw with
the new dimensions.

Hope that helps,
		*** Xanni ***
-- 
mailto:xanni@xxxxxxxxxx                         Andrew Pam
http://www.xanadu.com.au/                       Technical VP, Xanadu
http://www.glasswings.com.au/                   Technical Editor, Glass Wings
http://www.sericyb.com.au/sc/                   Manager, Serious Cybernetics
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