topic Re: Function code for dropdown on OO ALV Grid to trigger user_command in Application Development and Automation Discussions

Function code for dropdown on OO ALV Grid to trigger user_command

Former Member — Sun, 19 Apr 2009 00:32:14 GMT

Hi Experts,

I know we can add a dropdown to a column of an OO ALV Grid, set values to the dropdown list and allow the user to select some these values.

However , what I'm not sure is that if we can *assign a function code to the dropdown * which would then trigger the event user_command ( PAI ) of the ALV class so I can handle the changes to when a particular value is selected from a dropdown list, just like we do in normal dialogs.

Now I know that I can register the 'Enter' event and handle the data changes in data_changed event, but that is something I want to avoid the user from doing as far as possible to make the report more user friendly.

Awaiting your valuable inputs and would really appreciate your help.

Thanks & regards,

Advait

Re: Function code for dropdown on OO ALV Grid to trigger user_command

Former Member — Sun, 19 Apr 2009 00:45:17 GMT

HI,

Check the Demo program BCALV_EDIT_06 with having the DATA_CHANGED event still you can capture the changed data.

But you cannot assign the FCODES so that the change in list box will triggere the USER_COMMAND. You need to go with DATA_CHANGED event only.

Re: Function code for dropdown on OO ALV Grid to trigger user_command

Former Member — Mon, 20 Apr 2009 08:03:43 GMT

Hi Avinash,

Thanks for your reply.

Yes I know this example and I know how dropdown is created etc as I have mentioned this in my original post.

However to get the data_changed triggered, I need to register the Enter event and the method data_changed is called only when enter is pressed after the value changed in the dropdown.

But I need to call the data_changed immediately after the value is changed in the dropdown list without having the user to press the enter button.

Is that possible anyways ?

regards,

Advait

Re: Function code for dropdown on OO ALV Grid to trigger user_command

MarcinPciak — Mon, 20 Apr 2009 12:44:15 GMT

Hi,


      CALL METHOD o_alv_grid->register_edit_event
        EXPORTING
          i_event_id = cl_gui_alv=>mc_evt_modified.  "this constant will triger event change withouth ENTER key

Regards

Marcin

Re: Function code for dropdown on OO ALV Grid to trigger user_command

ramona_wolf — Tue, 28 Apr 2009 12:51:37 GMT

Hi!

I have the same question, too. If a value is selected by dropdown, another cell-value should change.

I registered the event

call method alv->register_edit_event

exporting

i_event_id = cl_gui_alv_grid=>mc_evt_modified.

But it doesn't work.

The DATA_CHANGED is just triggered when I leave to another cell, so I can't manage the done changes.

Is there another possibility to get the event?

Greetings Ramona

Re: Function code for dropdown on OO ALV Grid to trigger user_command

Former Member — Tue, 28 Apr 2009 13:32:02 GMT

Hi Marcin,

Sorry for the late reply, was occupied in lot of things.

Thanks of your reply. It worked to some extent, as in, the event data_changed is triggered after the focus is changed from the field, but not at the very moment I change the value by selecting it from the dropdown.

I can live with that for the moment.

But any more replies are most welcome.

regards,

Advait

Re: Function code for dropdown on OO ALV Grid to trigger user_command

MarcinPciak — Tue, 28 Apr 2009 14:10:46 GMT

Hi Advait,

No problem. Yes, this functionality requires changing the focus to other cell.

I think there is other solution. As the dropdown is kind of F4 activity try this way:


data: it_f4 type lvc_t_f4,
        wa_f4 type lvc_s_f4.

        wa_f4-FIELDNAME = 'CONNID'.
        wa_f4-REGISTER = 'X'.
        wa_f4-GETBEFORE = 'X'.
        wa_f4-CHNGEAFTER = 'X'.
        append wa_f4 to it_f4.

"register F4 event
  CALL METHOD g_alv_grid_ref->register_f4_for_fields
    EXPORTING
      it_f4  = it_f4.

"Once you try to pick the value HANDLE_DATA_CHANGED event will be triggered

"Definition
     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,

"Implementation
METHOD handle_data_changed .
    DATA: ls_mod_cells TYPE lvc_s_modi.

    IF e_onf4_before = 'X'.
      MESSAGE 'Data changed before F4' TYPE 'I'.
    ENDIF.

    IF e_onf4 = 'X'.   "if event triggered by F4
      MESSAGE 'Data changed on F4' TYPE 'I'.
    ENDIF.

    IF e_onf4_after = 'X'.
      MESSAGE 'Data changed after F4' TYPE 'I'.
    ENDIF.


   "here you know which cell was modified
    LOOP AT er_data_changed->mt_mod_cells INTO ls_mod_cells.
      
     "just example test case, here you can implement your code for modified cells
      IF ls_mod_cells-value >=5.
        CALL METHOD er_data_changed->add_protocol_entry
          EXPORTING
            i_msgid     = 'SABAPDOCU'
            i_msgty     = 'E'
            i_msgno     = '888'
            i_msgv1     = 'Only numbers below 5 are possibe'
            i_msgv2     = 'Please correct'
            i_fieldname = ls_mod_cells-fieldname
            i_row_id    = ls_mod_cells-row_id.

        CALL METHOD er_data_changed->modify_cell
          EXPORTING
            i_fieldname = ls_mod_cells-fieldname
            i_row_id    = ls_mod_cells-row_id
            i_value     = space.

      ENDIF.
    ENDLOOP.

  ENDMETHOD.                    "handle_data_changed

This approach works fine for picking value from input help. Never tried it for dropdown list. You have to try it out.

Regards

Marcin

Re: Function code for dropdown on OO ALV Grid to trigger user_command

Former Member — Tue, 28 Apr 2009 15:01:10 GMT

Hi Marcin,

Sounds interesting, thanks again, I will try this tomorrow for sure

regards,

Advait

Re: Function code for dropdown on OO ALV Grid to trigger user_command

Former Member — Tue, 05 May 2009 18:53:24 GMT

Hi Marcin,

I tried with f4 registration, but it still didn't work the way I thought it would. However, thanks for you valuable input.

Best regards,

Advait

Re: Function code for dropdown on OO ALV Grid to trigger user_command

Former Member — Mon, 18 Oct 2010 12:43:26 GMT

Hi Advait ,

I have got exactly similar requirement as yours ,. Could you please share how resolved this issue ? It would be of great help.

Many thanks,

Kumaran