Sometimes 5250 enquiry style transactions use a 5250 screen that loop on <enter key values> -> <display data> -> <enter key values> -> <display data> interactions.
Typically these screens have an INVOKE script that is structured along these lines:
var strAccessMenu = "SomeMenuScreenName";
var strThisEnquiry = "SomeCherryEnquiryScreenName";
/* Navigate to the menu that will provide access to the enquiry function */
NAVIGATE_TO_JUNCTION(strAccessMenu);
if ( !( CHECK_CURRENT_FORM(strAccessMenu, "Could not display menu", strAccessMenu) ) return;
/* Invoke the screen from the access menu */
SETVALUE("uMenuOptionField","7"); /* Say */
SENDKEY(KeyEnter);
if ( !( CHECK_CURRENT_FORM(strThisEnquiry,"Could not display enquiry screen", strThisEnquiry ) ) return;
/* Enter the appropriate key value and display the enquiry details */
SETVALUE("uKeyValueField",objInstanceList.Akey1[0] ); /* Say */
SENDKEY(KeyEnter);
if ( !( CHECK_CURRENT_FORM(strThisEnquiry,"Could not display", strThisEnquiry ) ) return;
/* Finished */
When this transaction is used repeatedly (for example by clicking down through an instance list or orders, products, policies, etc) you can sometimes short-circuit the navigation logic by a simple script change along the following lines. This change produces less 5250 screen interactions giving a faster response for your end-users:
var strAccessMenu = "SomeMenuScreenName";
var strThisEnquiry = "SomeCherryEnquiryScreenName";
/* We only need to navigate if we are not already at the screen */
if ( CURRENT_FORM() != strThisEnquiry )
{
/* Navigate to the menu that will provide access to the enquiry function */
NAVIGATE_TO_JUNCTION(strAccessMenu);
if ( !( CHECK_CURRENT_FORM(strAccessMenu, "Could not display menu", strAccessMenu) ) return;
/* Invoke the screen from the access menu */
SETVALUE("uMenuOptionField","7"); /* Say */
SENDKEY(KeyEnter);
if (!(CHECK_CURRENT_FORM(strThisEnquiry,"Could not display enquiry screen",strThisEnquiry)) return;
}
/* Enter the appropriate key value and display the enquiry details */
SETVALUE("uKeyValueField",objInstanceList.Akey1[0] ); /* Say */
SENDKEY(KeyEnter);
if ( !( CHECK_CURRENT_FORM(strThisEnquiry,"Could not display", strThisEnquiry ) ) return;
/* Finished */