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- When the user clicks on a line in instance list, the script is invoked to display the customer details.
- This script may also be invoked from another script to display the details of a specific customer.
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Since
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this
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script
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can
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be
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used
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in
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two
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different
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ways,
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it
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needs
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to
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be
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aware
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of
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what
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it
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is
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being
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asked
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to
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do.
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The
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easiest
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way
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to
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do
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this
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is
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to
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use
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the
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"ObjGlobal"
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object
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to
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pass
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optional
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parameters
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to
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it.
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In
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an
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INVOKE
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script
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you
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can
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define
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and
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check
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for
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the
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existence
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of
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optional
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parameters
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like
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this:
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/* Conceptually this script's behavior is controlled by 2 parameters which may or may not be passed to it */
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var Parameter1 = "parameter default value";
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var Parameter2 = "parameter default value";
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/* If either parameter has been passed in the objGlobal object then override the default behavior. */
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/* Note the destruction of the optional parameters. This is so they do not hang around to interfere */
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/* with later executions of this script. They are created, passed into the script and then destroyed. */
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if (objGlobal.optParameter1 != null)
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{ Parameter1 = objGlobal.optParameter1; objGlobal.optParameter1 = null; ...
}
if (objGlobal.optParameter2 != null)
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{ Parameter2 = objGlobal.optParameter2; objGlobal.optParameter2 = null; ...
}
/* Now use the values in Parameter1 and Parameter 2 to control how this script behaves */
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< etc >
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< etc >
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As
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a
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specific
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example,
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imagine
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an
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INVOKE
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script
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that
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by
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default
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displayed
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the
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current
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customer
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from
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the
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instance
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list.
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However,
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some
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other
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scripts
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reuse
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it
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to
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display
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a
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specific
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customer,
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which
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may
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or
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may
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not
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be
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in
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the
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instance
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list.
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You
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could
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handle
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this
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situation
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like
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this:
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/* By default this script displays the current customer from the instance list, so get the customer number */
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var RequestedCustomer = objListManager.AKey1
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[0...
];...
/* If the caller has supplied a specific customer number use it instead (making sure to destroy the optional parameter) */
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if (objGlobal.optRequestedCustomer != null)
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{
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RequestedCustomer = objGlobal.optRequestedCustomer;
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objGlobal.optRequestedCustomer = null;
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}
/* Now display the details of the customer identified in RequestedCustomer */
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< etc >
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< etc >
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In
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a
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script
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that
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wants
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to
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display
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a
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specific
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customer
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number
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you
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could
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do
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something
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like
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this:
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/* Save the changes and (re)display this customer */
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...
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case KeyEnter:
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{
var CustomerNumber = GETVALUE("CustNo"); /* Get the updated customer number from the current screen */
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SENDKEY(KeyEnter); /* Update the current screen details */
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objGlobal.optRequestedCustomer = CustomerNumber; /* Set up the specific customer number you want (re)displayed */
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NAVIGATE_TO_DESTINATION("uShowCustomerDetails"); /* Redisplay the customer by executing the destination script again */
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}
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break;...