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1>Deraadt: Correction of reference to choice module (previously referred to as Chat)

2009-12-21T02:55:28Z

Correction of reference to choice module (previously referred to as Chat)

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{{Formslib}}
This function adds a repeating group of elements. An array index starting with a zero index will be added to the elementname so that the form will return arrays of submitted values.

Also on the form there will be a button to add extra elements to the form. The form page reloads with extra form elements. This involves no javascript.

From the phpdoc comments from this moodleform method :

<pre>
/**
* Method to add a repeating group of elements to a form.
*
* @param array $elementobjs Array of elements or groups of elements that are to be repeated
* @param integer $repeats no of times to repeat elements initially
* @param array $options Array of options to apply to elements. Array keys are element names.
* This is an array of arrays. The second sets of keys are the option types
* for the elements :
* 'default' - default value is value
* 'helpbutton' - helpbutton params array is value
* 'disabledif' - last three moodleform::disabledIf()
* params are value as an array
* 'rule' - array of arguments for addRule for the elements
* or a string with a rule name which will be a rule name
* which be validated client side and which has a default error
* message.
* @param string $repeathiddenname name for hidden element storing no of repeats in this form
* @param string $addfieldsname name for button to add more fields
* @param int $addfieldsno how many fields to add at a time
* @param array $addstring array of params for get_string for name of button, $a is no of fields that
* will be added.
*/
</pre>

Actually it seems that $addstring is more like this: get_string('key', 'module', '{no}') in which $a is put into by formslib somewhere. (Penny)

This method can be called from within definition(). Here is an example from within choice_mod_form in choice/mod_form.php. You can see this at work if you add or update a Choice in your course.

<pre>
//-------------------------------------------------------------------------------
$repeatarray=array();
$repeatarray[] = &MoodleQuickForm::createElement('header', '', get_string('choice','choice').' {no}');
$repeatarray[] = &MoodleQuickForm::createElement('text', 'option', get_string('choice','choice'));
$repeatarray[] = &MoodleQuickForm::createElement('text', 'limit', get_string('limit','choice'));
$repeatarray[] = &MoodleQuickForm::createElement('hidden', 'optionid', 0);

if ($this->_instance){
$repeatno=count_records('choice_options', 'choiceid', $this->_instance);
$repeatno += 2;
} else {
$repeatno = 5;
}

$repeateloptions = array();
$repeateloptions['limit']['default'] = 0;
$repeateloptions['limit']['disabledif'] = array('limitanswers', 'eq', 0);
$mform->setType('limit', PARAM_INT);

$repeateloptions['option']['helpbutton'] = array('options', get_string('modulenameplural', 'choice'), 'choice');
$mform->setType('option', PARAM_TEXT);

$mform->setType('optionid', PARAM_INT);

$this->repeat_elements($repeatarray, $repeatno,
$repeateloptions, 'option_repeats', 'option_add_fields', 3);

</pre>

Note: I have experienced some weirdness when creating the elements for repeating statically, especially for textarea and htmleditor. Try $mform->createElement instead if this happens (Penny)

[[Category:Formslib]]

Development:lib/formslib.php repeat elements - История изменений

Олег Давидович: 1 версия импортирована

1>Deraadt: Correction of reference to choice module (previously referred to as Chat)