Structured ARRAYs in list dialogs

ARRAYs with sub-records can be used in list dialogs, to simplify array definition based on database tables, requiring additional information at runtime.

Starting with Genero version 3.00, ARRAY variables defined with a sub-records can be bound to DISPLAY ARRAY and INPUT ARRAY screen records.

This is especially useful when you need to define arrays from database tables, and handle additional row information at runtime, for example, to hold image resource for each row, to be displayed with the IMAGECOLUMN attribute.

An array is usually defined with a flat list of members:

SCHEMA shop
DEFINE a_items DYNAMIC ARRAY OF RECORD LIKE items.*
...

With version 3.00, arrays structured with sub-records can now be used within a DISPLAY ARRAY or INPUT ARRAY dialog. The array members and the form fields used by the screen array are bound by position:

SCHEMA shop
DEFINE a_items DYNAMIC ARRAY OF RECORD
                   item_data RECORD LIKE items.*,
                   it_image STRING,
                   it_count INTEGER
               END RECORD
...
DISPLAY ARRAY a_items TO sr.*
   ...

For more details about program variable to form field binding in dialogs, see Variable binding in DISPLAY ARRAY, Variable binding in INPUT ARRAY, Binding variables to form fields, Example 4: DISPLAY ARRAY with structured array.