topic Re: handle_data_changed - triggered in Application Development and Automation Discussions

handle_data_changed - triggered

Former Member — Wed, 04 Oct 2006 17:08:16 GMT

hello

I am using ALV display - classes (cont , grid etc...)

I am displaying an editable internal table

whenever i push the little button on the MATNR field - the one that display the sample options of MATNR...

its triggers the handle_data_changed event.

and for so the table "mt_inserted_rows" is deleted after this first touch of the screen.

how can i avoid this without using the sy-ucomm...

btw : to trigger the event manually i used the sy-ucomm.

thanks ahead

specially to those who understood the problem.

Eyal.

Re: handle_data_changed - triggered

uwe_schieferstein — Wed, 04 Oct 2006 19:19:44 GMT

Hello Eyal

To be honest I do no really understand your problem, particularly what you mean by <i>"...the little button on the MATNR field - the one that display the sample options of MATNR</i>...".

However, I do understand how event handling of the grid control works:

- You have an editable grid control. The user has changed some data.

- When the user executes a function that will lead to PAI (e.g. ENTER, SAVE) then you must call the instance method CHECK_DATA_CHANGED otherwise the changes on the ALV list will not be transported to your itab in the ABAP program (nor will event DATA_CHANGED be raised)

- Since the user changed some data CHECK_DATA_CHANGED will raise event DATA_CHANGED. Now the changes are transported to the itab in ABAP.

- If, for example, you want to validate the changed data then you have to define an event handler (e.g. HANDLE_DATA_CHANGED).

That is the logic of event handling for editable grid controls.

Regards

Uwe

Re: handle_data_changed - triggered

Former Member — Sun, 15 Oct 2006 08:24:54 GMT

Hello Uwa.

Thanks for replying.

The little button on the MATNR field - its F4 func - when I push this button a window opens and I can choose which MATNR I want to use.

I'll try to describe the scenario:

- I want to enter a new record in my DB-table - insert line (which have the MATNR field).

- I want to choose which MATNR will be in this new line

- I push the little button (F4)

- When I do so it triggered the "Data_Changed"

- For now, the it_table does not change

- But, the system table which handled by the Data_Changed trigger - "mt_inserted_rows" - does change and now holds the new line's number and its value - NULL or ' '.

- After I insert all the other values I push the 'Save' button and its triggers the PAI which triggers the "Handle_Data_Change".

- But now, the "mt_inserted_rows" is now 'initial' and I all of its data is lost.

I need this table in order not to search the new it_table for its new record. (and insert it to my DB_table)

Hope it is more clear now.

thanks ahead

with regards.

Eyal Cohen.

Re: handle_data_changed - triggered

Former Member — Sun, 15 Oct 2006 08:48:39 GMT

Populate the it_table in F4 event

Re: handle_data_changed - triggered

Former Member — Mon, 16 Oct 2006 01:21:32 GMT

Howdy Eyal,

Why dont you use the parameters that come through with the 'data_changed' event? It will set the flags (E_ONF4, E_ONF4_BEFORE, E_ONF4_AFTER). Is this what you mean, ie how to tell when this event was called by F4?

Also, I think 'so what?' if it disappears from mt_inserted_rows because afterwards it will be in mt_modified_rows instead. If you need to validate the whole row at once, then add a validation field/flag to your display table and flag it as technical in the fieldcat (fcat-tech = 'X'). You can manually set this flag when a row is ok.

Hope this helps,

Phil.

Re: handle_data_changed - triggered

Former Member — Mon, 16 Oct 2006 08:26:31 GMT

Hello phillip

Let me try to clear up my question.

I just don't want that the event - "data change" will be activate when i push the F4 button on some fields.

I didn't understand the first part of your answer - " It will set the flags (E_ONF4, E_ONF4_BEFORE, E_ONF4_AFTER). "

Although the second part of your answer is good and probably work - it is not an elegant solution

Thanks neway and with best regards.

Eyal.

Re: handle_data_changed - triggered

Former Member — Mon, 16 Oct 2006 23:24:14 GMT

Hi Eyal,

Let me clear up the first part of my answer.

If you look at cl_gui_alv_grid >> events tabs, you will see a data_changed event with 4 parameters - those 3 flags and a instance of cl_alv_changed_data_protocol.

Now in your event handler class you would be responding to these events with a method. Now the method probably just calls a form somewhere in your program - and it probably only passes the cl_alv_changed_data_protocol, and not the flags.

So the flags are definitely there in the event you just may not be using them in your form.

Also have a look at the public atrribute MT_DELTA_CELLS_INSERTED

of cl_gui_alv_grid

I'm not sure but this may keep a global record of changed data.

But if you want the data_changed event to be triggered when they manually enter data, but <b>not</b> when they use F4 - this will be very hard. You probably have to extend class cl_gui_alv_grid.

Or try using set_registered_events( ). You'll have to hunt the the attributes of cl_gui_alv_grid to find a likely event to turn off tho.

Cheers,

Phil.

Message was edited by: Phillip Manning