topic Re: Problem on ALV GRID CONTROL in Application Development and Automation Discussions

Problem on ALV GRID CONTROL

Former Member — Wed, 01 Oct 2008 09:12:26 GMT

HI ,

I have created an OO based ALV GRID ( 6columns) .

I n this ALV i have a dropdown box on one column.

I want that on change of the value on drop down box the other dependent columns (othe 5 columns) should be filled with some data .

i am not able to find out any event when we change the value in the drop down list box .

is there any event which gets triggered on change of value in the drop down box .

Please help .

regards,

vikram.

Re: Problem on ALV GRID CONTROL

Former Member — Wed, 01 Oct 2008 09:18:32 GMT

>is there any event which gets triggered on change of value in >the drop down box .

if you set the handler / register the edit event then DATA_CHANGED event will trigger.

Did you see the programs

BCALV_EDIT_06

BCALV_EDIT_07

Re: Problem on ALV GRID CONTROL

Former Member — Wed, 01 Oct 2008 09:30:15 GMT

no DATA_CHANGED does not get triggerred on change of value on drop down . yes i have seen those programs .

Re: Problem on ALV GRID CONTROL

Former Member — Wed, 01 Oct 2008 11:13:06 GMT


> no  DATA_CHANGED does not get triggerred on change of value on drop down . yes i have seen those programs .

Yes it will trigger, I did one program, it is triggering. Do you have any local event handler for DATA_CHANGED event.

check the reply in this thread...

Re: Problem on ALV GRID CONTROL

narin_nandivada3 — Wed, 01 Oct 2008 14:42:12 GMT

HI Vikram,

Please check this thread

Check our friend UWE reply in this thread -->

Hope this would help you.

Good luck

Narin

Re: Problem on ALV GRID CONTROL

uwe_schieferstein — Thu, 02 Oct 2008 05:10:23 GMT

Hello Vikram

It appears that chosing a value from a dropdown box does not trigger any event itself (not even any F4-related event).

I assume the ALV grid works similar like an Excel worksheet. If you change a cell value which is part of a sum function then you first have to hit the ENTER button before the sum is updated.

In order to implement your requirement I have copied BCALV_EDIT_06 and have made the following changes:

(1) Event handler class for DATA_CHANGED:


...
*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&


CLASS lcl_eventhandler DEFINITION.

  PUBLIC SECTION.

    CLASS-METHODS:
      handle_data_changed FOR EVENT data_changed OF cl_gui_alv_grid
        IMPORTING
          er_data_changed
          e_onf4
          e_onf4_before
          e_onf4_after
          e_ucomm
          sender.

ENDCLASS.                    "lcl_eventhandler DEFINITION


*----------------------------------------------------------------------*
*       CLASS lcl_eventhandler IMPLEMENTATION
*----------------------------------------------------------------------*
*
*----------------------------------------------------------------------*
CLASS lcl_eventhandler IMPLEMENTATION.

  METHOD handle_data_changed.
    BREAK-POINT.

    CALL METHOD cl_gui_cfw=>set_new_ok_code
      EXPORTING
        new_code = 'REFRESH'
*      IMPORTING
*        rc       =
        .

  ENDMETHOD.                    "handle_data_changed

ENDCLASS.                    "lcl_eventhandler IMPLEMENTATION



DATA: ok_code LIKE sy-ucomm,
      save_ok LIKE sy-ucomm,
...

(2) Register EDIT event and SET HANDLER (routine CREATE_AND_INIT_ALV):


...
* Define a drop down table.
  PERFORM set_drdn_table.

  CALL METHOD g_grid->register_edit_event
    EXPORTING
      i_event_id = cl_gui_alv_grid=>mc_evt_enter
    EXCEPTIONS
      error      = 1
      OTHERS     = 2.
  IF sy-subrc <> 0.
*   MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*              WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.

  SET HANDLER:
    lcl_eventhandler=>handle_data_changed FOR g_grid.


  SELECT * FROM sbook INTO TABLE pt_outtab UP TO g_max ROWS."#EC CI_NOWHERE
...

(3) Event handler HANDLE_DATA_CHANGED just trigger PAI:


*---------------------------------------------------------------------*
*       MODULE PAI INPUT                                              *
*---------------------------------------------------------------------*
MODULE pai INPUT.
  save_ok = ok_code.
  CLEAR ok_code.
  CASE save_ok.
    WHEN 'EXIT'.
      PERFORM exit_program.

    WHEN 'REFRESH'.
      PERFORM refresh_list.

    WHEN OTHERS.
*     do nothing
  ENDCASE.
ENDMODULE.                    "pai INPUT

*&---------------------------------------------------------------------*
*&      Form  REFRESH_LIST
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*  -->  p1        text
*  <--  p2        text
*----------------------------------------------------------------------*
FORM refresh_list .
* define local data
  DATA: ls_outtab   LIKE LINE OF gt_outtab.

  LOOP AT gt_outtab INTO ls_outtab.
    IF ( ls_outtab-wunit = 'KG' ).
      ls_outtab-class = 'C'.
    ELSE.
      ls_outtab-class = 'F'.
    ENDIF.
    MODIFY gt_outtab FROM ls_outtab INDEX syst-tabix.
  ENDLOOP.

  CALL METHOD g_grid->refresh_table_display
*    EXPORTING
*      is_stable      =
*      i_soft_refresh =
*    EXCEPTIONS
*      finished       = 1
*      others         = 2
          .
  IF sy-subrc <> 0.
*   MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*              WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.

ENDFORM.                    " REFRESH_LIST

Procedure:

1) Choose value from dropdown list

2) Hit enter button

3) Value in column CLASS changes according to chosen dropdown value

Regards

Uwe

Re: Problem on ALV GRID CONTROL

Former Member — Fri, 03 Oct 2008 06:13:14 GMT

Hi Vikram,

Just an addition to the above post...

If we register the cl_gui_alv_grid=>mc_evt_modified event,

the data_changed event ll be raised at any user-action(Even placing the cursor on another cell)

after modifying a cell...

Kindly check the below code...

*----------------------------------------------------------------------*
*       CLASS lcl_event_responder DEFINITION                           *
*----------------------------------------------------------------------*
CLASS lcl_event_responder DEFINITION.
  PUBLIC SECTION.
    DATA  : ls_changed_cell TYPE  lvc_s_modi,
            lv_language     TYPE  spras..
    METHODS refresh_changed_data  FOR EVENT data_changed
                                  OF cl_gui_alv_grid
                                  IMPORTING er_data_changed
                                            e_ucomm.

ENDCLASS.                    "event_responder DEFINITION

DATA: go_handler         TYPE REF TO lcl_event_responder,
      go_grid            TYPE REF TO cl_gui_alv_grid,
      go_dummy_container TYPE REF TO cl_gui_container,
      gt_fieldcat        TYPE lvc_t_fcat,
      gv_language        TYPE spras VALUE 'E',
      gt_outtab          TYPE TABLE OF makt WITH HEADER LINE.

CALL SCREEN 100.

*---------------------------------------------------------------------*
*       MODULE PBO OUTPUT                                             *
*---------------------------------------------------------------------*
MODULE pbo OUTPUT.
  SET PF-STATUS 'BASIC'.
  PERFORM create_and_init_alv CHANGING gt_outtab[]
                                       gt_fieldcat.
ENDMODULE.                    "pbo OUTPUT
*---------------------------------------------------------------------*
*       MODULE PAI INPUT                                              *
*---------------------------------------------------------------------*
MODULE pai INPUT.
  LEAVE PROGRAM.
ENDMODULE.                    "pai INPUT



*&---------------------------------------------------------------------*
FORM create_and_init_alv CHANGING pt_outtab LIKE gt_outtab[]
                                  pt_fieldcat TYPE lvc_t_fcat.

  CHECK go_grid IS NOT BOUND.

  CREATE OBJECT go_grid
    EXPORTING
      i_parent = go_dummy_container.

  PERFORM build_display_table.

  PERFORM build_fieldcat CHANGING pt_fieldcat.

  PERFORM set_drdn_table.

  go_grid->set_table_for_first_display( CHANGING it_fieldcatalog      = pt_fieldcat
                                                 it_outtab            = pt_outtab ).

  go_grid->set_ready_for_input( 1 ).

* raises the 'data_changed' event when we select another cell/any action after changing the data
  go_grid->register_edit_event( EXPORTING i_event_id = cl_gui_alv_grid=>mc_evt_modified ).

  CREATE OBJECT go_handler.

  SET HANDLER go_handler->refresh_changed_data FOR go_grid.

ENDFORM.                               "CREATE_AND_INIT_ALV
*&---------------------------------------------------------------------*
FORM build_display_table.
  FREE gt_outtab.
  SELECT * FROM makt UP TO 20 ROWS INTO TABLE gt_outtab WHERE spras EQ gv_language.
ENDFORM.                               "build_display_table
*&---------------------------------------------------------------------*
FORM build_fieldcat CHANGING pt_fieldcat TYPE lvc_t_fcat.

  DATA ls_fcat TYPE lvc_s_fcat.

  CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
    EXPORTING
      i_structure_name = 'MAKT'
    CHANGING
      ct_fieldcat      = pt_fieldcat.

  LOOP AT pt_fieldcat INTO ls_fcat.
    IF    ls_fcat-fieldname EQ 'SPRAS'.
      ls_fcat-edit       = abap_true..
      ls_fcat-drdn_hndl  = '1'.
      ls_fcat-outputlen  = 8.
      ls_fcat-checktable = '!'.        "do not check foreign keys
      MODIFY pt_fieldcat FROM ls_fcat.
    ENDIF.
  ENDLOOP.

ENDFORM.                               "build_fieldcat
*&---------------------------------------------------------------------*
FORM set_drdn_table.

  CHECK go_grid->offline( ) IS INITIAL.

  DATA: lt_dropdown TYPE lvc_t_drop,
        ls_dropdown TYPE lvc_s_drop.

  ls_dropdown-handle = '1'.
  ls_dropdown-value  = 'EN'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '1'.
  ls_dropdown-value  = 'DE'.
  APPEND ls_dropdown TO lt_dropdown.

  CALL METHOD go_grid->set_drop_down_table
    EXPORTING
      it_drop_down = lt_dropdown.

ENDFORM.                                " set_drdn_table
*&---------------------------------------------------------------------*
FORM change_display_table USING pv_language pv_rowno TYPE i.
  READ TABLE gt_outtab INDEX pv_rowno.
  SELECT SINGLE * FROM makt INTO gt_outtab WHERE matnr = gt_outtab-matnr AND spras = pv_language.
  IF sy-subrc EQ 0.
    DELETE gt_outtab INDEX pv_rowno.
    INSERT gt_outtab INDEX pv_rowno.
  ELSE.
    CLEAR : gt_outtab-maktx,
            gt_outtab-maktg.
    DELETE gt_outtab INDEX pv_rowno.
    INSERT gt_outtab INDEX pv_rowno.
  ENDIF.
ENDFORM.                    "change_display_table

*---------------------------------------------------------------------*
*       CLASS event_responder IMPLEMENTATION                          *
*---------------------------------------------------------------------*
CLASS lcl_event_responder IMPLEMENTATION.
  METHOD refresh_changed_data.
    READ TABLE er_data_changed->mt_mod_cells INTO ls_changed_cell INDEX 1.
    CALL FUNCTION 'CONVERSION_EXIT_ISOLA_INPUT'
      EXPORTING
        input  = ls_changed_cell-value
      IMPORTING
        output = lv_language.
    PERFORM change_display_table USING lv_language ls_changed_cell-row_id.
    go_grid->refresh_table_display( ).
  ENDMETHOD.                    "click
ENDCLASS.                    "event_responder IMPLEMENTATION

Cheers,

Jose.

Edited by: Jose on Oct 3, 2008 10:19 AM

Re: Problem on ALV GRID CONTROL

Former Member — Fri, 03 Oct 2008 09:32:36 GMT

if you go with cl_gui_alv_grid=>mc_evt_enter , then after editing you need to press enter button, then also it will trigger. if you don't check check it once.

Re: Problem on ALV GRID CONTROL

uwe_schieferstein — Sun, 05 Oct 2008 21:22:21 GMT

Hello Vikram

I tested Jose's suggestion with my sample report and as I assumed the dropdown selection does not trigger any event. However, as soon as you move the cursor to any other cell the DATA_CHANGED event is triggered.

Thanks to Jose for his input.

Regards

Uwe

Re: Problem on ALV GRID CONTROL

Former Member — Tue, 14 Oct 2008 06:36:46 GMT

Thanks guys for your Valuable inputs .

the event is working on enter .

thank you once again for the helpful answers

Regards,

vikram