function FormTestRebuildPreserveValuesForm::buildForm

Overrides FormInterface::buildForm

File

core/modules/system/tests/modules/form_test/src/Form/FormTestRebuildPreserveValuesForm.php, line 25

Class

FormTestRebuildPreserveValuesForm

Form builder for testing preservation of values during a rebuild.

Namespace

Code

public function buildForm(array $form, FormStateInterface $form_state) {
    // Start the form with two checkboxes, to test different defaults, and a
    // textfield, to test more than one element type.
    $form = [
        'checkbox_1_default_off' => [
            '#type' => 'checkbox',
            '#title' => t('This checkbox defaults to unchecked'),
            '#default_value' => FALSE,
        ],
        'checkbox_1_default_on' => [
            '#type' => 'checkbox',
            '#title' => t('This checkbox defaults to checked'),
            '#default_value' => TRUE,
        ],
        'text_1' => [
            '#type' => 'textfield',
            '#title' => t('This textfield has a non-empty default value.'),
            '#default_value' => 'DEFAULT 1',
        ],
    ];
    // Provide an 'add more' button that rebuilds the form with an additional two
    // checkboxes and a textfield. The test is to make sure that the rebuild
    // triggered by this button preserves the user input values for the initial
    // elements and initializes the new elements with the correct default values.
    if (!$form_state->has('add_more')) {
        $form['add_more'] = [
            '#type' => 'submit',
            '#value' => 'Add more',
            '#submit' => [
                '::addMoreSubmitForm',
            ],
        ];
    }
    else {
        $form += [
            'checkbox_2_default_off' => [
                '#type' => 'checkbox',
                '#title' => t('This checkbox defaults to unchecked'),
                '#default_value' => FALSE,
            ],
            'checkbox_2_default_on' => [
                '#type' => 'checkbox',
                '#title' => t('This checkbox defaults to checked'),
                '#default_value' => TRUE,
            ],
            'text_2' => [
                '#type' => 'textfield',
                '#title' => t('This textfield has a non-empty default value.'),
                '#default_value' => 'DEFAULT 2',
            ],
        ];
    }
    // A submit button that finishes the form workflow (does not rebuild).
    $form['submit'] = [
        '#type' => 'submit',
        '#value' => 'Submit',
    ];
    return $form;
}