Jan,
I like to encapsulate the entire dialog capability into a single
function call. This includes setup and display.
For instance. Let's say you want a dialog box which asks the user to
select a single line from a list of stuff. And you want also to have a
custom prompt. Plus you want an OK and Cancel button
I would write the function 'askListItem' and call it from the button
named "pick your favorite fruit"
(tFruitList is a variable containing a line-delimited list of fruits)
get askListItem(tFruitList,"Please choose a fruit from the list")
if it is "Cancel" then exit mouseUp
put it into tMyFavoriteFruit
So, the question is how to make it this simple?
Easy, you'll want to build a stack "askList" with 2 fields: "theList"
and "thePrompt"; 2 buttons "Cancel" and "OK"; and in the stack script:
function askListItem pList,pPrompt
put "" into the dialogData
put pList into fld "theList" of stack "askList"
put pPrompt into fld "thePrompt" of stack "askList"
modal stack "askList"
return the dialogData
end askListItem
The script of the button "OK" is:
on mouseUp
put the hilitedlines of fld "theList" into tLineNum
if tLineNum is "" then
beep
exit mouseUp
end if
set the dialogData to line tLineNum of fld "theList"
close this stack
end mouseUp
and the script for the button "Cancel" is:
on mouseUp
set the dialogData to "Cancel"
close this stack
end mouseUp
Now the secret to making all this work is that you need to make
'askList' a library stack. This way, all of it's stack scripts will be
available to whatever card/stack/button you're on.
To do this, you'll need to insert into the openStack handler of card 1
of your main stack:
on openStack
start using stack "askList"
end openStack
That's all there is to it! Now, you've got an encapsulated stack which
can process list queries from anywhere.
Hope this helps,
Chipp
Jan Sælid wrote:
Hi
I use several modal stacks to communicate with the user.
My first question is:
Is there a way to pass informasjon from a modal stack back to the function on
the stack that
opened it? Like "Return"? I use a custom property for now....
When the modal stack closes the function in the main stack that opened it
continues. Just what I want. But for the remaining message path in the function
I have to refer to the main stack - even if the fuction resides in the main
stack. Or else I get a background not found error.
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