HP 3000 Manuals HP 3000 Manuals
About the Enhanced Application This chapter and the two following chapters describe a substantial extension to the existing training application. You will develop the items needed to use multiple files together in an application. This system involves the product file and an option file. Product/Option Application The application involves a product/option relationship where each product must have at least one option, and can have any number of options related to it. To add the new features to this application, you must create some new screens using windows, scroll areas, and function keys. These additions require a number of new logic blocks as well as a decision table to support them. Finally you will create a new report that uses sort levels and file linkages. You perform these steps in the next three chapters. As before, the main menu allows the user to select an update mode. The product_scrn data screen is then displayed for each mode. When necessary, this screen uses a window to allow the user to add, modify, or delete option records. The screen and window appear as shown here.product_scrn Data Screen Function Keys. The data screen and windows used in this part of the application have sets of function keys that allow the user to swap between product maintenance and option maintenance. Scrolling Options. At any time when a valid product record has been retrieved, the user can press a Scroll Options function key to display the details of the options for the current product. The option details are displayed in a scroll area at the bottom of the screen. Reporting. The extensions to the application include a report that lists the details of products and options. The user can specify a range of products for reporting. For all products in the specified range, the report lists the details of the products and the options. It also calculates the cost of stock for each option, the cost of stock for each product, and the total cost of stock for all products listed. Processing Rules. The processing rules for the product/option maintenance system are as follows: * A product may be added or modified any time. When a product is added to the system, a basic option must also be added. This option must have the number "000". * A product may only be deleted if there are no options except option number 000 associated with it. * When a product is deleted, option 000 must also be deleted. * An option, other than option 000, can be added to an existing product. * An option may be modified at any time. * An option, other than option 000, may be deleted at any time.
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