I guess I stumped everyone. :(
xavier.bury at clearstream.com
xavier.bury at clearstream.com
Thu Nov 3 08:31:52 EST 2005
One common source of errors is with the word "me"
First because if you transfer code from a control to a stack, Me changes.
Me works fine for cards or stacks but you have to be sure of teh context.
For example in a button script
gives you nothing - unless the button has content. Same with a field.
"if the owner of the target is me"
You need to check if the target exists!!!
if may not be necessary on a mouseup but on other
handlers, and one that gets sent a message above all,
there's no guarantee there is a target...
use-revolution-bounces at lists.runrev.com wrote on 03/11/2005 14:15:29:
> On Nov 3, 2005, at 1:51 AM, Ken Ray wrote:
> > Basically here's how this works - all the ___stack and ___card
> > messages
> > (preOpenStack, openCard, etc.) are sent to the card, and then
> > travel through
> > the hierarchy to the stack. If the stack is a substack, it then
> > travels to
> For a beginner (someday I'll stop being a beginner), that's where the
> problem starts. I have this message called preOpenStack, which I can
> use to set up my stack, and it's handled in the script for the . . .
> card? Yes, I see why; but it is not intuitive.
> Thanks for your very lucid explanation of "owner" and "target" and
> "me". It turns out that my problem was this: during development I
> have an "initialize" button on the one card of my main stack (so as
> to set up or reset the underlying database), and the button's script
> send "preOpenStack" to this stack
> If my preOpenStack handler begins with "if the owner of the target is
> me" then I get an execution error (because of passing that message
> into the stratosphere) when I press the "initialize" button; but it
> works fine when I'm really opening the stack. Alternatively, the line
> "if the target is me" works with the button, but does nothing if I'm
> really opening the stack. All that makes sense I think. I can't think
> how to write that line for both contexts -- suggestions?
> Charles Hartman
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> use-revolution at lists.runrev.com
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