novice question re "marked" and customkeys

[dunbarx at aol.com]

I think Tim wants many different and independent "marked" functions. The native marking system includes the abilities that are missing in using custom properties, say.


But maybe a slight change in usage would work. Since "go next marked card" is something the engine understands and manages, why not task the engine by using:


goNextBarkedCard


or


unBarkAllCards


These commands now can trigger custom handlers, with identical functionality, by checking custom properties (the "barked") of the cards. It is just a matter of using one long command instead of the native compound command. Needs a loop, and speed might be an issue, of course. But at least these things can become a natural part of your thinking, and extend the language.


Craig Newman






-----Original Message-----
From: Timothy Miller <gandalf at doctorTimothyMiller.com>
To: How to use LiveCode <use-livecode at lists.runrev.com>
Sent: Thu, Mar 31, 2011 1:18 pm
Subject: novice question re "marked" and customkeys


Hey dudes,

The "marked" property is so easy to use. "go next marked" and "unmark all cards" 
are so fast and foolproof! Very handy.

I'm wondering if I can somehow define my own versions of "marked"

E.g., in a hypothetical stack, the "marked" of cards 3, 10, 22 and 99 is "true"

I somehow define my own properties, like "barked" and "darked"

In the same hypothetical stack, the "barked" of cards 1,2, 3 and 4 is "true"

the "darked" of cards 2,4,6,8 and 99 is "true"

Somehow I could "go next barked" or "go next darked" just as fast and easy as I 
could "go next marked"

In this perfect world, I could "unbark" or "undark" all cards as easily as I 
could unmark them.

I suspect this isn't really possible. I suspect the closest equivalent would be 
to use customkeys and repeat loops, to find the next card with a certain value 
of a certain customkey, and so on. I suspect this would be somewhat slower than 
"go next marked" or "unmark all"

The marked of a card resembles a customkey, but I suspect it works differently. 
True?

Is it possible to "go next" to a card with a certain value of a certain 
customKey? Or is it necessary to use a repeat loop to inspect the each card 
until I encounter the customKey and value I want?

Is it possible to "set the poodleNose of all cards to empty"? I suspect not.

Am I getting this right? Am I missing anything important?

Thanks in advance,

Tim
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