4 LEVEL ALV BASED ON DOUBLECLICK

Question

hi friends,
i Want to make 4 level Alv Based on Doubleclick,
Eg.
1 level :- Based On selectionscreen (ALV)        
2nd level :- double click on any cell of 1st alv (ALV)
3rd level :- double click on any cell of 2st alv (ALV)
4th level :- double click on any cell of 3rd alv (Call Tranasaction)
i make till second level using class lcl_event_receiver...
i need ur help to go ahead..
thankx..
Swapnil.

Answer 1

Hi Swapnil,
I tried that and got the same in first attempt itself. i am not sure where you got strucked.
Here is the sample code... try this..
REPORT Z195_ALV_LEVELS.
DATA: ispfli TYPE TABLE OF spfli.
DATA: isflight TYPE TABLE OF sflight.
DATA: iscarr TYPE TABLE OF scarr.
DATA: imara TYPE TABLE OF mara.
DATA: xspfli TYPE spfli.
DATA: gr_table TYPE REF TO cl_salv_table.
DATA: gr_table1 TYPE REF TO cl_salv_table.
DATA: gr_table2 TYPE REF TO cl_salv_table.
DATA: gr_table3 TYPE REF TO cl_salv_table.
DATA: gr_functions TYPE REF TO cl_salv_functions_list.
DATA: gr_events TYPE REF TO cl_salv_events_table.
DATA: gr_selections TYPE REF TO cl_salv_selections.
DATA: w_level TYPE sy-index.
* CLASS lcl_handle_events DEFINITION
CLASS lcl_handle_events DEFINITION.
  PUBLIC SECTION.
    METHODS: on_user_command FOR EVENT added_function OF cl_salv_events
    IMPORTING e_salv_function,
    on_double_click FOR EVENT double_click OF cl_salv_events_table
    IMPORTING row column.
ENDCLASS. "lcl_handle_events DEFINITION
DATA: event_handler TYPE REF TO lcl_handle_events.
START-OF-SELECTION.
  SELECT * INTO CORRESPONDING FIELDS OF TABLE ispfli FROM spfli UP TO 100 ROWS.
  CALL METHOD cl_salv_table=>factory
    IMPORTING
      r_salv_table = gr_table
    CHANGING
      t_table      = ispfli.
  gr_table->set_screen_status(
  pfstatus = 'SALV_TABLE_STANDARD'
  report = sy-repid
  set_functions = gr_table->c_functions_all ).
  gr_events = gr_table->get_event( ).
  CREATE OBJECT event_handler.
  SET HANDLER event_handler->on_user_command FOR gr_events.
  SET HANDLER event_handler->on_double_click FOR gr_events.
* Set up selections.
  gr_selections = gr_table->get_selections( ).
  gr_selections->set_selection_mode( 1 ). "Single
* Display
  gr_table->display( ).
* CLASS lcl_handle_events IMPLEMENTATION
CLASS lcl_handle_events IMPLEMENTATION.
  METHOD on_user_command.
* Get the selection rows
    DATA: lr_selections TYPE REF TO cl_salv_selections.
    DATA: lt_rows TYPE salv_t_row.
    DATA: ls_rows TYPE i.
    DATA: message TYPE string.
    CASE e_salv_function.
      WHEN 'MYFUNCTION'.
*        lr_selections = gr_table->get_selections( ).
*        lt_rows = lr_selections->get_selected_rows( ).
*        READ TABLE lt_rows INTO ls_rows INDEX 1.
*        READ TABLE ispfli INTO xspfli INDEX ls_rows.
*        CONCATENATE xspfli-carrid xspfli-connid xspfli-cityfrom xspfli-cityto
*         INTO message SEPARATED BY space.
*        MESSAGE i001(00) WITH 'You pushed the button!' message.
    ENDCASE.
  ENDMETHOD. "on_user_command
  METHOD on_double_click.
    IF w_level EQ 0.
      w_level = 1.
      PERFORM display_2ndlevel.
    ELSEIF w_level EQ 1.
      w_level = 2.
      PERFORM display_3rdlevel.
    ELSEIF w_level EQ 2.
      w_level = 3.
      PERFORM display_4thlevel.
    ELSEIF w_level EQ 3.
      w_level = 4.
      MESSAGE i001(00) WITH 'No further digging is possible'.
    ENDIF.
*    DATA: message TYPE string.
*    DATA: row_c(4) TYPE c.
*    row_c = row.
*    CONCATENATE 'Row' row_c 'Column' column INTO message SEPARATED BY space.
*    MESSAGE i001(00) WITH 'You double-clicked on ' message.
  ENDMETHOD. "on_double_click
ENDCLASS. "lcl_handle_events IMPLEMENTATION
*&      Form  DISPLAY_2NDLEVEL
*       text
*  -->  p1        text
*  <--  p2        text
FORM display_2ndlevel .
  SELECT * INTO CORRESPONDING FIELDS OF TABLE isflight FROM sflight UP TO 100 ROWS.
  CALL METHOD cl_salv_table=>factory
    IMPORTING
      r_salv_table = gr_table1
    CHANGING
      t_table      = isflight.
  gr_table1->set_screen_status(
  pfstatus = 'SALV_TABLE_STANDARD'
  report = sy-repid
  set_functions = gr_table1->c_functions_all ).
  gr_events = gr_table1->get_event( ).
  CREATE OBJECT event_handler.
  SET HANDLER event_handler->on_user_command FOR gr_events.
  SET HANDLER event_handler->on_double_click FOR gr_events.
* Set up selections.
  gr_selections = gr_table1->get_selections( ).
  gr_selections->set_selection_mode( 1 ). "Single
* Display
  gr_table1->display( ).
ENDFORM.                    " DISPLAY_2NDLEVEL
*&      Form  DISPLAY_3RDLEVEL
*       text
*  -->  p1        text
*  <--  p2        text
FORM display_3rdlevel .
  SELECT * INTO CORRESPONDING FIELDS OF TABLE iscarr FROM scarr UP TO 100 ROWS.
  CALL METHOD cl_salv_table=>factory
    IMPORTING
      r_salv_table = gr_table2
    CHANGING
      t_table      = iscarr.
  gr_table2->set_screen_status(
  pfstatus = 'SALV_TABLE_STANDARD'
  report = sy-repid
  set_functions = gr_table2->c_functions_all ).
  gr_events = gr_table2->get_event( ).
  CREATE OBJECT event_handler.
  SET HANDLER event_handler->on_user_command FOR gr_events.
  SET HANDLER event_handler->on_double_click FOR gr_events.
* Set up selections.
  gr_selections = gr_table2->get_selections( ).
  gr_selections->set_selection_mode( 1 ). "Single
* Display
  gr_table2->display( ).
ENDFORM.                    " DISPLAY_3RDLEVEL
*&      Form  DISPLAY_4THDLEVEL
*       text
*  -->  p1        text
*  <--  p2        text
FORM display_4thlevel .
  SELECT * INTO CORRESPONDING FIELDS OF TABLE imara FROM mara UP TO 100 ROWS.
  CALL METHOD cl_salv_table=>factory
    IMPORTING
      r_salv_table = gr_table3
    CHANGING
      t_table      = imara.
  gr_table3->set_screen_status(
  pfstatus = 'SALV_TABLE_STANDARD'
  report = sy-repid
  set_functions = gr_table3->c_functions_all ).
  gr_events = gr_table3->get_event( ).
  CREATE OBJECT event_handler.
  SET HANDLER event_handler->on_user_command FOR gr_events.
  SET HANDLER event_handler->on_double_click FOR gr_events.
* Set up selections.
  gr_selections = gr_table3->get_selections( ).
  gr_selections->set_selection_mode( 1 ). "Single
* Display
  gr_table3->display( ).
ENDFORM.                    " DISPLAY_4THLEVEL