Lingo Dictionary > A-C > call |
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call
Syntax
call #
handlerName
,
script
, {
args
...}
call (#
handlerName
,
scriptInstance
, {
args
...})
Description
Command; sends a message that invokes a handler in specified scripts where handlerName
is the name of the handler to be activated, script
references the script or a list of scripts, and args
are any optional parameters to be passed to the handler.
If script
is a single script instance, an error alert occurs if the handler is not defined in the script's ancestor script.
If script
is a list of script instances, the message is sent to each item in the list in turn; if the handler is not defined in the ancestor script, no alert is generated.
The call
command can use a variable as the name of the handler. Messages passed using call
are not passed to other scripts attached to the sprite, cast member scripts, frame scripts, or movie scripts.
Example
This handler sends the message bumpCounter to the first behavior script attached to sprite 1:
on mouseDown me -- get the reference to the first behavior of sprite 1 set xref = getAt (the scriptInstanceList of sprite 1,1) -- run the bumpCounter handler in the referenced script, -- with a parameter call (#bumpCounter, xref, 2) end
Example
This example shows how a call
statement can call handlers in a behavior or parent script and its ancestor.
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This is the parent script: |
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This is the ancestor script: |
-- script Animal property legCount on new me, newLegCount set legCount = newLegCount return me end on run me put "Animal running with "& legCount &" legs" end on walk me put "Animal walking with "& legCount &" legs" end |
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The following statements use the parent script and ancestor script. |
This statement creates an instance of the parent script:
set m = new(script "man")
This statement makes the man walk:
call #walk, m -- "Animal walking with 2 legs"
This statement makes the man run:
set msg = #run call msg, m -- "Man running with 2 legs and rock"
This statement creates a second instance of the parent script:
set m2 = new(script "man")
This statement sends a message to both instances of the parent script:
call msg, [m, m2] -- "Man running with 2 legs " -- "Man running with 2 legs "
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