ABAP_to_the_Future

10
ALV SALV Reporting Framework
or average—but in 14 years I’ve never needed any of those in a report, so I’ve left
my method set to use the default total va lue. (Now that I’ve said this, tomorrow
a business user will come to me and say he really needs a column with the minimum
value at the bottom.)
METHOD set_subtotal.
mo_aggregations = mo_alv_grid->get_aggregations( ).
TRY.
mo_aggregations->add_aggregation( columnname = id_field_name ).
CATCH cx_salv_not_found
cx_salv_data_error
cx_salv_existing.
"Raise Fatal Exception
ENDTRY.
ENDMETHOD.
Listing 10.15 SET_SUBTOTAL Method
You can also, of course, change the headin gs at the top of each column in the
report. You may find that when you do change the name of the column, you end
up changing the long, medium, and short texts to exactly the same string. You can
define separate methods for changing th e long, medium, and short texts in case
they need to be different, but if the value is constant (i.e., short), you can just pass
it in to the SET_LONG_TEXT method, and it changes all three values.
In Listing 10.16, you ‘ll see that if the string length is short enough, then the SET_
LONG_TEXT method copies the value to the medium text and to the short text
method, if it can. (The medium text and short text methods are not shown here,
but they follow the same principle.)
METHOD set_long_text.
* Local Variables
DATA: ld_medium_text TYPE scrtext_m,
ld_short_text TYPE scrtext_s.
TRY.
mo_column ?= mo_columns->get_column( id_field_name ).
mo_column->set_long_text( id_long_text ).
IF strlen( id_long_text ) LE 20.
ld_medium_text = id_long_text.
mo_column->set_medium_text( ld_medium_text ).
ENDIF.
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