topic ALV issue: method DATA_CHANGED called twice in Application Development and Automation Discussions

ALV issue: method DATA_CHANGED called twice

yes_sapteam — Sun, 17 Dec 2006 14:58:22 GMT

Hi.

I have implemented my own F4 for my ALV and now I get a problem since my DATA_CHANGED method is called BEFORE I change the cell content AND AFTER and this causes problems in my logic.

There is a demo program in SLIS ("BCALV_EDIT_03") but they use the default F4 that comes from the DDIC.

Another issue is that their MT_GOOD_CELLS always have the last cell that was changed, while my MT_GOOD_CELLS have all the cell I changed from previous visits to DATA_CHNAGED.

For example I change the value of FieldA and I visit the MY_DATA_CHANGED method and MT_GOOD_CELLS have 1 record with data on FieldA.

Than I change FieldB and when I visit MY_DATA_CHANGED method the MT_GOOD_CELLS have 2 record: 1 with data on FieldA and 1 with data on FieldB.

Any help will be appreciated.

ayal.

Re: ALV issue: method DATA_CHANGED called twice

uwe_schieferstein — Sun, 17 Dec 2006 20:03:35 GMT

Hello Ayal

Sample report <b>BCALV_TEST_GRID_F4_HELP</b> explains most of the F4 help options in ALV lists. You can choose to check values before and after the F4 event.

If your event handler method for event DATA_CHANGED should be triggered only AFTER calling the F4 help then I guess you should have the following coding in your method:

* We are in the F4 event
  IF ( e_onf4 = 'X' ).
 
*   Event: after the F4 help value has been selected
    IF ( e_onf4_after = 'X' ).
*    valide values selected by F4 help
     ...
   ELSE.
     RETURN.  " leave method my_data_changed
   ENDIF.

  ENDIF.

Regards

Uwe

Re: ALV issue: method DATA_CHANGED called twice

yes_sapteam — Mon, 18 Dec 2006 19:40:08 GMT

Hi Uwe.

Thanx for the reply but my problem is that if I compare my program behaviour to the demo program "BCALV_EDIT_03" I see that their DATA_CHANGED method is only visited when the Enter is pressed and <i>only after</i> a value was changed.

I copied this demo program code to the letter and still my method is visited twice !!

I have some Java experiance and I don't understand why this event should ever be called twice. I think that there should be an event of

before_data_changed

and another

after_data_changed

, but that's me.

Another issue I have is that my

mt_good_cells

have all the fields I touched while it should only have the last field.

thanx

ayal.