Well, I guess I put 2 and 2 together and made 5, but I would be surprised if I was the only one...At 1:14 AM -0800 2/11/03, Graham Samuel wrote: [...] But what about >my objection from the transcript dictionary (the implication that thenumbers aren't unique?)Graham, can you be more specific about what gave you this idea? I'd like to correct it, of course, if there's a particular statement that's unclear or misleading....
If you have a card with a lot of objects on it (well, more than one will do), and you look at the properties of any object via the Development Environment, you will see a set of four buttons for changing the object's layer - 'send to back', 'move backward', 'move forward' and 'send to front'. My mental model of the card was that the layers could be shared, so that one imagines 'sent to back' objects like the backdrop in a theatre, and foreground objects like props or actors, some sets of whom might be exactly the same distance from the front of the stage.
With this mental model it's natural to assume that several objects could be **at the same level** at the same time. Indeed, this does happen on the Mac, I believe, where drawing programs based on QuickDraw can (for example) bring a whole bunch of objects to the front in one action. So I reasoned that layer numbers could not be unique. Of course the docs never say this, although the glossary entry for 'layer' could be interpreted that way:
"The position of a control relative to the front and back; the order in which controls are stacked on the card"
Now that I've looked into it more thoroughly of course I see that Revolution doesn't have 'my' model, although I have not yet worked out all the consequences (for example, a group will contain objects which by definition will all be on separate layers - what happens when I send the whole group to the back?).
I'm sorry that people like me keep banging on about misconceptions we've somehow picked up on the way and then seem to be blaming them on the documentation. I do feel the docs are well done and therefore don't want to appear negative. Maybe it helps to see that different people approach issues from a different angle sometimes.
Graham
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Graham Samuel / The Living Fossil Co. / UK & France
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