Photoshop CS2
Adobe Photoshop CS2 Scripting Guide
Scripting basics 29
{
/*create a confirm dialog with the text Quit?
and two response buttons
change the value of flag to the selected response*/
flag = confirm("Quit?")
}
//change the value of flag back to false
var flag = false
do
{
flag = confirm("Are you sure?")
}
while (flag == false)
Using Subroutines, Handlers and Functions
Subroutines are scripting modules you can refer to from within your script. They allow you to re-use parts
of scripts.If you find yourself typing or pasting the same lines of code into several different places in a
script, you’ve identified a good candidate for a subroutine.
Note:
Subroutines can also be called
handlers
,
functions
, or
routines
; these terms can have slight
differences in different scripting languages. In VBScript, a function is a subroutine that returns a
value. JavaScript generally uses the term
function
; AppleScript generally uses the term
handler
.
You can pass one or more values to a subroutine or function; you can receive one or more values in return.
For example, you could pass a single measurement value (such as inches) to a function and ask the
function to return the equivalent value in a different measurement system (such as centimeters). Or you
could ask a function to return the geometric center point of an object from its geometric bounds.
The following samples demonstrate simple subroutine syntax, followed by a more complex subroutine
example.
AS
You enclose a handler in the words
on
and
end
.
Simple Handler
This sample defines a handler named
helloWorld()
that, when called from a script, displays a dialog
with the message
Hello World
.
on helloWorld()
display dialog “Hello World”
end
To call the handler, you simply include it in your script.
tell Application “Photoshop CS2”
helloWorld()
end tell
When the script runs, the handler enacts the statements in the handler definition.
Complex Handler
The following script displays a dialog with the message
Are you sure?
and two buttons:
Yes
and
No
.
set flag to DoConfirm ("Are you sure?")
display dialog flag as string
'create a handler named DoConfirm
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