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[REBOL] Re: list: multiple columns update

From: rebol:optushome:au at: 15-Feb-2002 7:09

----- Original Message ----- From: "Robert M. Muench" <[robert--muench--robertmuench--de]> To: <[rebol-list--rebol--com]> Sent: Friday, February 15, 2002 3:58 AM Subject: [REBOL] Re: list: multiple columns update
> > -----Original Message----- > > From: [rebol-bounce--rebol--com] [mailto:[rebol-bounce--rebol--com]]On Behalf Of > > Allen Kamp > > Sent: Thursday, February 14, 2002 2:27 PM > > To: [rebol-list--rebol--com] > > Subject: [REBOL] Re: list: multiple columns update > > > Here is a simple multilist column example. Hope it helps. > > Hi, thanks. Yes it does but I have some questions > > > view layout [ > > style txt txt [if row [selected: row show lst]] 100 > > What does the [...] block stand for in a style command? Is this the code
> gets executed if a row is clicked?
Yes. This is what gets executed when a face in the list gets clicked.
> You use 'row and 'row gets set to 'count within the supply block. So when
is the
> code in the style definition executed? IMO this can only happen after the
> block has been exectued so that 'row has a valid value. On the other hand
> use the 'selected value with the 'if in the supply block... This indicates
> the code must be executed before the supply block so that 'selected has a
> value.
Yes. I set 'row to 'count so that I can access that value outside of the supply func, in this case I do it specifically so we can set 'selected to the current row/count value when a face is clicked. There is nothing list specific about using style, I am just using it as a shortcut to provide the action block to all the columns by creating a style with that as its action. I don't have time to check your code now, but will have a look when I get home. But I suspect that you understand how to fix it now. Cheers, Allen