- 🇩🇰Denmark ressa Copenhagen
I agree, this would be an awesome feature. I tried to make the examples work in the current release, and failed with both of them ... so an update and a working example would be fantastic :)
When creating forms with a lot of steps, it would be useful to have links on the step indicator that allows the user to easily go to another part of the form.
We did something like this in a form alter hook:
/**
* @param $form
* @param \Drupal\Core\Form\FormStateInterface $form_state
*/
function _foo_change_step(&$form, FormStateInterface $form_state) {
/** @var \Drupal\simple_multistep\MultistepController $multiStep */
$multiStep = $form_state->get('multistep_controller');
$multiStep->setFormState($form_state);
$multiStep->saveInputValues();
$multiStep->saveStoredValues();
$trigger = $form_state->getTriggeringElement();
$currentStep = $multiStep->getCurrentStep();
$targetStep = $trigger['#parents'][0];
if ($targetStep > $currentStep) {
for ($i = $currentStep; $i < $targetStep; $i++) {
$multiStep->increaseStep();
}
}
elseif ($targetStep < $currentStep) {
for ($i = $currentStep; $i > $targetStep; $i--) {
$multiStep->reduceStep();
}
}
$stored_input = $multiStep->getInputValues();
if (isset($stored_input[$targetStep]) && !empty($stored_input[$targetStep])) {
$form_state->setUserInput($stored_input[$targetStep]);
}
$form_state->set('multistep_controller', $multiStep);
$form_state->setRebuild();
}
/**
* Implements hook_form_FORM_ID_alter().
*
* @link https://www.drupal.org/project/simple_multistep/issues/2993675#comment-13069202
* @see simple_multistep_form_alter()
*/
function foo_form_alter(&$form, FormStateInterface $form_state) {
/** @var \Drupal\simple_multistep\MultistepController $multiStep */
if ($multiStep = $form_state->get('multistep_controller')) {
$currentStep = $multiStep->getCurrentStep();
}
else {
$currentStep = 0;
}
$indicator = new StepIndicator($form, $form_state, 0);
$form['steps_label'] = [
'#type' => 'container',
'#weight' => -1,
];
foreach ($indicator->getSteps() as $step_number => $step) {
$format_settings = $step->format_settings;
if ($format_settings['show_step_title']) {
$button = [
'#type' => 'button',
'#value' => $step->label,
'#validate' => ['_foo_change_step'],
];
if ($currentStep == $step_number) {
$button['#disabled'] = TRUE;
$button['#attributes']['class'][] = 'active';
}
$form['steps_label'][] = $button;
}
}
}
(The fact that FormStep::setCurrentStep() is protected forced us to do some weird loops.)
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I agree, this would be an awesome feature. I tried to make the examples work in the current release, and failed with both of them ... so an update and a working example would be fantastic :)