HP Integrity NonStop J-Series - Manual (Page 247)

Sample Project-Tracking System
Determining the Format of the Screens
• If necessary, consider using more than one box to represent
different fields from a file.
You can improve the appearance of the screen by using
more than one box to represent a file. You could, for
example, use two boxes to display fields from the "events"
file for the "event-detail" application.
By using two boxes to represent the same file, you can
restrict access to certain fields within the file while
allowing full access to other fields within the same file.
Consider the "event-revised" application, which uses
information from a single file: the "events" file. While an
employee who uses this application might want to see the
contents of the "predict-start-date" field and the
"predict-end-date" fields, you probably want to protect the
contents of these fields from changes by the employee.
If you restrict the "event-revised" application to read-only
access to the events file, you protect the
"predict-start-date" and "predict-end-date" fields, but you
also preclude changes to the "revised-start-date" or
"revised-end-date" fields. If you generate the application so
that more than one box represents the "events" file and link
these boxes on the primary key, the application will display a
portion of the same record in each box. For example, a box
with read-only access can display the "predict-start-date" and
"predict-end-date" fields while a box with read and update
access can display the "revised-start-date" and
"revised-end-date" fields. Refer the description of
generating the "event-revised" application for more
information about this process.
• Provide descriptive screen titles.
Each of the applications in the project-tracking system
displays a screen title that describes its purpose.
For example, the screen title of the look-up application is
"Employee ID Display and Entry Screen."
• If appropriate, display any unusual user instructions on the
screen.
Within the project-tracking system, every calling application
displays a message that tells the user how to request the
called application; every called application displays a
message that tells the user how to return to the calling
application.
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