How to promt user to save changes when changing non-database fields?

Question

Hi,
I have a form with two tabs. The datablock Block_1 on tab_2 is based on a database view. But all the displayed items of Block_1 are non-database items. Whenever a user changes some items in Block_1 and presses save button, the values from non_db items get copied to the db_items (based on view) and commit_form is called. This works fine.
But the problem here is: after changing some items in block_1, if the user navigates to some other option/form from the menu , the form doesnt promt the user to 'save the changes' and all the changes made are lost. How can I fix that?
I have a form level key-exit trigger, (which does not fire) with following code :-
Declare
  X  Number;
  alert_is             alert;
Begin
If :System.Mode = 'ENTER-QUERY' Then
       Exit_Form;
Else
  If :System.Form_Status In ('NEW','QUERY') Then
       alert_is := FIND_ALERT('TMPL_EXIT'); -- "Are you sure you want to exit?"
    X := Show_Alert('TMPL_EXIT');
    If X = Alert_Button1 Then
       Exit_Form(no_validate);
    End If;
    Else
       Exit_Form;
  End If;
End If;
End;

Answer 1

Slava Natapov wrote:
Samita wrote:
Whenever a user changes some items in Block_1 and presses save button, the values from non_db items get copied to the db_items (based on view) and commit_form is called. Try to copy values to the db_items not in save button, but in WHEN-VALIDATE_ITEM of non_db items.- I created the non-db items becoz, it was asking me 'Do you want to save changes', even when I only queried data from the view (becoz i was doing some computations while displaying the items. and the form assumed that the DB items were begin changed ). Inorder to get rid of that problem, i used mirror_items (non-db) for all the db items.
So under this scenario, when i copy values to the db_items in WHEN-VALIDATE_ITEM trigger of non_db items, the form considers the db_items are changed and asks 'Do you want to save changes' even when the user has not made any changes and only queried data.
Edited by: Samita on Dec 9, 2009 10:12 AM