Detect form validation error

Question

Hi there,
I have a page that displays a report and a form on the same page.
The user clicks on a row in the report - triggering a re-submit - and the form fills with the correct details.
On the report there's a NEW button to add a new row.
When clicked the form is emptied and ready for filling in.
On the form there's a CREATE button to accept the entry and create the row (using a custom After Submit process).
I use Before Header processes to set the details in the form depending on the row clicked or a particular REQUEST from a button.
I also enable/disable button depending on the REQUEST (in add mode the CREATE button is shown - otherwise the APPLY button).
So far so good.
Now i have some validations on the form and when one of them fails it re-writes the screen with the inline error messages shown however the REQUEST is then empty!
This causes problems for me when pre-setting the form with data and enabling/disabling buttons.
Is it possible to detect somehow if a field validation error has occured or set the REQUEST with a particular value?
Because of the REQUEST reset after an error my CREATE button gets disabled and my APPLY button re-appears causing confusion for the user (and me :-) ).
I hope I'm making myself clear here.
Ruud

Answer 1

The problem is not how to set the items & buttons.
My buttons are conditionally shown by looking at the REQUEST value.
My problem is more with the logic of detecting an error on my screen.
I need something like following pseudo-code:-
IF :REQUEST = 'ADD_ROW' THEN -- Insert mode (invoked by pressing button NEW on the report)
  clear form
  disable button APPLY in the form
  enable button CREATE in te form
ELSE
  IF form shows an inline validation error THEN -- Error mode
    -- do nothing to change the values on the form
    -- do nothing to change existing enabled/disabled buttons
    -- Basically allow the user to correct mistakes and continue
    NULL;
  ELSE -- Normal update mode
    fill form with details of selected row
    enable APPLY button
    disable CREATE button
  END IF;
END IF;It's the "form shows an inline validation error" bit that I have problems with.
How do I know an error is shown on the screen?
Is there an application item that tells me this?
Perhaps I could set a page or app item myself in the validation code to flag that an error occurred?
Ruud