Handlers and Scope

[Mark Smith]

Adam, a handler will be in the form:

on myHandler param1,param2,etc
	doStuff
end myHandler

a function will be:

function myFunction param1,param2,etc.
	do stuff
	return something
end myFunction

the calling of these will be someting like

myHandler param1,param2
or:
put myFunction(param1,param2) into myVariable

Functions have their parameters enclosed in brackets, while handlers  
don't.
Functions return a value, while handlers simply carry out actions.

In this case, because you have simply typed fMyFunction, without a  
preceding "put" or "get", Rev tries to find a handler named  
fMyFunction, which doesn't exist, instead of a function called  
fMyFunction, which does.

So you either need to redefine fMyFunction as a handler (if it  
doesn't return a value), or make sure that you are calling it with  
the necessary code to accept a returned value.

Cheers,

Mark

On 7 Dec 2005, at 14:47, Adam wrote:

> Hi all:
>
> Being a Revolution newbie and I all, I really appreciate this list  
> and everyone on it.  I'd like to thank Trevor DeVore for responding  
> to my first post.  Trevor you've made it look easy, thanks. ;)
>
> I have put to work Trevor's suggestions in a function.  That  
> function resides in the script of the first card on my stack.
>
> I am then trying to call that function from the script of a button  
> on the card in the following way:
>
> on mouseUp
>   put field "fldItemsToFind" into lItemsToFind
>   put field "fldNumItemsAllowed" into lNumItemsAllowed
>   fMyFunction(lItemsToFind,lNumItemsAllowed)
> end mouseUp
>
> When put it into browse mode and click the button, I get Rev  
> telling me it can't find the handler fMyFunction.
>
> What is the scope of handlers in relation to the stack, cards in  
> the stack, and the elements of each card?
>
> It's probably a very simple fix, but really appreciate the help. ;)
>
> Thanks very kindly in advance.
>
> Adam
> --
> "Each day is an opportunity to learn something new." - Me
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