1. ABAP Programming MINS298c Fall 1998

2. Overview Hiding in ABAP Primitive Pagination ABAP does Windows Making Messages Assignments

3. Hiding in ABAP (p.366) Hide Command –temporarily stores variables –Hide Area related by line number –recalled at AT LINE-SELECTION event Display area Hide area Write: / airline, fnumber. Hide: / airline-cost. airline fnumber airline-cost

4. Hiding in ABAP Hide Command –temporarily stores variables –Hide Area related by line number –recalled at AT LINE-SELECTION event Display area Hide area Write: / airline, fnumber. Hide: / airline-cost. AT LINE-SELECTION write: / airline-cost. airline fnumber airline-cost cursor >

5. Primitive Pagination (p.374) Language Dependent –Headers & Labels Default –one “logical page” of 60,000 lines –list header from text elements - Title and Heading Overrides –Events: TOP-OF-PAGE: END-OF-PAGE: NEW-PAGE –“NO STANDARD PAGE HEADING” clause –LINE-COUNT clause

6. ABAP does Windows (p364) Window command –starting at x1 y1 –ending at x2 y2 1 X 80 1 Y 24

7. ABAP does Windows (p364) Window command –starting at 10 10 –ending at 20 20 1 x1 x2 80 1 y1 y2 24 10 20 10 20

8. Making Messages (p.440) Message Types a - abnormal end ABEND; no chance to correct e - error; cannot continue asks for possible correction w - warning; choice to continue or re-enter data i - information; display only s - success; displays message Message command –MESSAGE messid –The ‘&’ sign represents variables for the message from the program

9. Message Example my_name = ‘Bne’. if my_name ne ‘Ben’. MESSAGE e001 my_name. endif. 001 Wrong entry & e001 001 Wrong entry Bne cont new

10. Assignments Add the code necessary to the currency program to catch the currencies that do not convert and to print these on a separate page so that the output appears on multiple pages. Use the new-page, end-of-page, and top-of-page events Change the currency program to send an error message to the user as appropriate when the exchange rate does not exist for a currency.

11. Possible Presentation Topics AT USER COMMAND GUI Design Variants Dialog boxes - List of useful ones List of events - List of most used Field Symbols AT CURSOR Frames Logical Databases Uploading and downloading files ABAP Query Using Object Browser to develop a program Demonstrating efficiency of conditionals User and formula exits