function ContainerDemo::buildForm

Overrides FormInterface::buildForm

File

modules/form_api_example/src/Form/ContainerDemo.php, line 22

Class

ContainerDemo

Implements the container demo form.

Namespace

Code

public function buildForm(array $form, FormStateInterface $form_state) {
    $form['description'] = [
        '#type' => 'item',
        '#markup' => $this->t('This form example demonstrates container elements: details, fieldset and container.'),
    ];
    // Details containers replace D7's collapsible field sets.
    $form['author'] = [
        '#type' => 'details',
        '#title' => 'Author Info (type = details)',
    ];
    $form['author']['name'] = [
        '#type' => 'textfield',
        '#title' => $this->t('Name'),
    ];
    $form['author']['pen_name'] = [
        '#type' => 'textfield',
        '#title' => $this->t('Pen Name'),
    ];
    // Conventional field set.
    $form['book'] = [
        '#type' => 'fieldset',
        '#title' => $this->t('Book Info (type = fieldset)'),
    ];
    $form['book']['title'] = [
        '#type' => 'textfield',
        '#title' => $this->t('Title'),
    ];
    $form['book']['publisher'] = [
        '#type' => 'textfield',
        '#title' => $this->t('Publisher'),
    ];
    // Containers have no visual display but wrap any contained elements in a
    // div tag.
    $form['accommodation'] = [
        '#type' => 'container',
    ];
    $form['accommodation']['title'] = [
        '#type' => 'html_tag',
        '#tag' => 'p',
        '#value' => $this->t('Special Accommodations (type = container)'),
    ];
    $form['accommodation']['diet'] = [
        '#type' => 'textfield',
        '#title' => $this->t('Dietary Restrictions'),
    ];
    $form['actions'] = [
        '#type' => 'actions',
    ];
    $form['actions']['submit'] = [
        '#type' => 'submit',
        '#value' => $this->t('Submit'),
    ];
    return $form;
}