- // If the form is being rebuilt due to something else than a pressed button,
- // e.g. a select that was changed, then $_POST['op'] will be empty. As a
- // result, Forms API won't be able to detect any pressed buttons. Eventually
- // it will call _form_builder_ie_cleanup(), which will automatically, yet
- // inappropriately assign the first in the form as the clicked button. The
- // reasoning is that since the form has been submitted, a button surely must
- // have been clicked. This is of course an invalid reasoning in the context
- // of AHAH forms.
- // To work around this, we *always* set $form_state['submitted'] to true,
- // this will prevent _form_builder_ie_cleanup() from assigning a wrong
- // button. When a button is pressed (thus $_POST['op'] is set), then this
- // button will still set $form_state['submitted'],
- // $form_state['submit_handlers'] and $form_state['validate_handlers'].
- // This problem does not exist when AHAH is disabled, because then the
- // assumption is true, and then you generally provide a button as an
- // alternative to the AHAH behavior.
- $form_state['submitted'] = TRUE;
- // Continued from the above: when an AHAH update of the form is triggered
- // without using a button, you generally don't want any validation to kick
- // in. A typical example is adding new fields, possibly even required ones.
- // You don't want errors to be thrown at the user until they actually submit
- // their values. (Well, actually you want to be smart about this: sometimes
- // you do want instant validation, but that's an even bigger pain to solve
- // here so I'll leave that for later…)
- if (!isset($_POST['op'])) {
- // For the default "{$form_id}_validate" and "{$form_id}_submit" handlers.
- $form['#validate'] = NULL;
- $form['#submit'] = NULL;
- // For customly set #validate and #submit handlers.
- $form_state['submit_handlers'] = NULL;
- $form_state['validate_handlers'] = NULL;
- // Disable #required and #element_validate validation.
- _ahah_helper_disable_validation($form);
- }
