How does one come to know this..drop down in ALV in WD

[Former Member]

Hello Friends,

I had a requirement of adding a drop down in ALV, i eventually got it but I have some questions about it

I used the following code and got the drop down

lr_column = lr_column_settings->get_column( 'BWART' ).

CREATE OBJECT lr_input_field

EXPORTING

value_fieldname = 'BWART'.

lr_column->set_cell_editor( lr_input_field ).

DATA : LR_DROPDOWN TYPE REF TO CL_SALV_WD_UIE_DROPDOWN_BY_KEY.

CREATE OBJECT LR_DROPDOWN EXPORTING SELECTED_KEY_FIELDNAME = 'BWART'.

LR_COLUMN->SET_CELL_EDITOR( LR_DROPDOWN ).

DATA: LT_VALUESET TYPE TABLE OF WDR_CONTEXT_ATTR_VALUE,

LS_VALUESET TYPE WDR_CONTEXT_ATTR_VALUE,

LR_NODE TYPE REF TO IF_WD_CONTEXT_NODE,

LR_NODEINFO TYPE REF TO IF_WD_CONTEXT_NODE_INFO.

LR_NODE = WD_CONTEXT->GET_CHILD_NODE( 'RETURN_NODE' ).

LR_NODEINFO = LR_NODE->GET_NODE_INFO( ).

LS_VALUESET-VALUE = '973'.

LS_VALUESET-TEXT = '973'.

APPEND LS_VALUESET TO LT_VALUESET.

LS_VALUESET-VALUE = '222'.

LS_VALUESET-TEXT = '222'.

APPEND LS_VALUESET TO LT_VALUESET.

LR_NODEINFO->SET_ATTRIBUTE_VALUE_SET( EXPORTING NAME = 'BWART' VALUE_SET = LT_VALUESET ).

My question is ... how does 1 know which class to use? how to use that class... most of concepts about OOPS are clear.. but i still cant figure out how does 1 find out which class to use.. is it all by expericence..

[Lukas_Weigelt · Accepted solution]

In short: Yes, by experience. Then again, for WD4A there is a class for each UI-Element available. Once you know this, you can easily search se24 for CLWD<UI-NAME>* or the like.