Trigger ALV Event

Event Class: CL_SALV_EVENTS_TABLE

Following steps are important for ALV event to trigger.

1. Create  a method for ALV Event to start for instance method double click is used.
2. Defind double click method for double click event of class cl_salv_events_table, also we need to mention the method which will be called at time of double click i.e detail method.        CLASS-METHODS: handle_double_click        FOR EVENT double_click                   OF cl_salv_events_table        IMPORTING row column,        detail            IMPORTING matnr TYPE matnr. 
    
3. Register event handler method for the events of alv SET HANDLER handle_double_click FOR events.
4. also defind and impliment detail method.

 Following sample code demonstrates ALV event.
 
  REPORT yua_alv_event.

CLASS demo DEFINITION.
  PUBLIC SECTION.
    CLASS-METHODS main.
  PRIVATE SECTION.
    TYPES: BEGIN OF ty_data,
             banfn TYPE  banfn,
             matnr TYPE  matnr,
           END OF ty_data.
    CLASS-DATA  t_data TYPE TABLE OF ty_data.
    CLASS-METHODS: handle_double_click
      FOR EVENT double_click
                  OF cl_salv_events_table
      IMPORTING row column,
      detail
        IMPORTING matnr TYPE matnr.

ENDCLASS.

CLASS demo IMPLEMENTATION.
  METHOD main.

    SELECT  banfn matnr
           FROM eban
           INTO TABLE t_data.
    TRY.
        cl_salv_table=>factory(
          IMPORTING r_salv_table = DATA(alv)
          CHANGING  t_table = t_data ).

        DATA(events) = alv->get_event( ).
        SET HANDLER handle_double_click FOR events.

        alv->display( ).
      CATCH cx_salv_msg.
        MESSAGE 'ALV display not possible' TYPE 'I'
                DISPLAY LIKE 'E'.
    ENDTRY.
  ENDMETHOD.

  METHOD detail.
    TYPES: BEGIN OF alv_line,
             matnr   TYPE matnr,
             maktx   TYPE maktx,
           END OF alv_line.
    DATA   alv_tab    TYPE TABLE OF alv_line.
    SELECT matnr , maktx
           FROM MAKT
           WHERE  matnr = @matnr
           INTO CORRESPONDING FIELDS OF TABLE @alv_tab.
    IF sy-subrc <> 0.
      MESSAGE e007(sabapdemos).
    ENDIF.
    TRY.
        cl_salv_table=>factory(
          IMPORTING r_salv_table = DATA(alv)
          CHANGING  t_table = alv_tab ).
        alv->set_screen_popup( start_column = 1
                               end_column   = 60
                               start_line   = 1
                               end_line     = 12 ).
        alv->display( ).
      CATCH cx_salv_msg.
        MESSAGE 'ALV display not possible' TYPE 'I'
                DISPLAY LIKE 'E'.
    ENDTRY.
  ENDMETHOD.

  METHOD handle_double_click.
    READ TABLE t_data INDEX row ASSIGNING FIELD-SYMBOL(<s_data>).
    IF sy-subrc <> 0.
      RETURN.
    ENDIF.
    IF column = 'MATNR'.
      demo=>detail( <s_data>-matnr ).
    ENDIF.

  ENDMETHOD.

ENDCLASS.

START-OF-SELECTION.
  demo=>main( ).

 Below is the output of above ABAP code.