Interactive ALV: Hotspots, F4 and Events

Explanation

Register a handler for the LINK_CLICK event on CL_SALV_TABLE to react to hotspot clicks. Use GET_FUNCTIONS to add custom toolbar buttons. Column colouring uses CL_SALV_COLUMN->SET_COLOR. F4 help attaches through the underlying dictionary type — always declare with dictionary types (KUNNR, MATNR) rather than STRING.

Code example

SET HANDLER lcl_events=>on_link_click FOR lo_alv->get_event( ).lo_alv->get_functions( )->set_all( abap_true ).

Real project scenario

A shipping cockpit uses colour to flag late deliveries — red for >5 days late, amber for 1–5.

Common mistakes

Registering handlers after DISPLAY; hardcoding colour indexes instead of using constants.

Best practices

Encapsulate ALV code in a dedicated builder class; keep event handlers thin and delegate to services.

Interview angle

How do you pass the clicked row's key to another transaction?