Hi Lee,
You're correct that $form_state['clicked_button'], if it is set
correctly, contains lots of useful information, including #id, #parents,
and #array_parents. The problem is anything based on
$form_state['clicked_button'] requires that it be set to the button that
was actually clicked, and that can only happen when no two buttons
within a form contain identical #name and #value. If buttons have the
same #name and different #value, all is ok. If buttons have different
#name and the same #value, all is ok. But if two buttons have the same
#name and the same #value, there is no way for the Form API or any
server-side code to know which of the buttons was actually clicked,
since clicking either button would send the exact same $_POST information.
Alex.
Lee Rowlands wrote:
Hi Richard
Are you using '#tree' => TRUE?
If so, you can access $form_state['clicked_button']['parents'] which will be
an array of the keys of the parent elements. If each row in your table is
built as follows:
$form['rows'][$row_id]['field1'] = array(...),
$form['rows'][$row_id]['field2'] = array(...) etc and you are rendering this
as a table using a theme function and element_children to determine the
valid values of $row_id (is there any other way?) then your
['clicked_button']['parents'] will contain an array including the final op
but also the 'parent' $row_id, this can tell you which button was pressed.
Have a look at the quicktabs module for an example.
HTH
Lee Rowlands
-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of Richard Morse
Sent: Thursday, 24 June 2010 2:03 AM
To: [email protected]
Subject: Re: [development] Changing button #name?
On Jun 23, 2010, at 11:37 AM, Adam Gregory wrote:
Actually all buttons in a Drupal form have the name "op" so that you can
easily determine which button was pressed in the submit function. i.e. if
($op = 'blah) or switch ($op).
If you are using the Drupal Ahah framework for this then your submit
function should handle it. But since all your buttons are titled Remove,
what you can do is use $form_state['clicked_button']['#id'] to determine
which button was clicked in your submit function. As #id is built of the
array key you give the element in the $form variable.
I know that by default they are all named 'op'. This is my problem; I cannot
distinguish the buttons by their '#value', because it is always the same.
I'm solving this by setting the '#name' to allow me to determine precisely
which button was clicked. If I don't set '#name', then *regardless* of which
button I press, the 'clicked_button' structure in the $form_state
corresponds to the last button of the same '#value' added to the form. Part
of the awkwardness here is that HTML doesn't allow you to display some text
in a button while having a different value.
Ricky
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