function FormTestCheckboxForm::buildForm

Overrides FormInterface::buildForm

File

core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxForm.php, line 26

Class

FormTestCheckboxForm

Form for testing checkbox.

Namespace

Code

public function buildForm(array $form, FormStateInterface $form_state) {
    // A required checkbox.
    $form['required_checkbox'] = [
        '#type' => 'checkbox',
        '#required' => TRUE,
        '#title' => 'required_checkbox',
    ];
    // A disabled checkbox should get its default value back.
    $form['disabled_checkbox_on'] = [
        '#type' => 'checkbox',
        '#disabled' => TRUE,
        '#return_value' => 'disabled_checkbox_on',
        '#default_value' => 'disabled_checkbox_on',
        '#title' => 'disabled_checkbox_on',
    ];
    $form['disabled_checkbox_off'] = [
        '#type' => 'checkbox',
        '#disabled' => TRUE,
        '#return_value' => 'disabled_checkbox_off',
        '#default_value' => NULL,
        '#title' => 'disabled_checkbox_off',
    ];
    // A checkbox is active when #default_value == #return_value.
    $form['checkbox_on'] = [
        '#type' => 'checkbox',
        '#return_value' => 'checkbox_on',
        '#default_value' => 'checkbox_on',
        '#title' => 'checkbox_on',
    ];
    // But inactive in any other case.
    $form['checkbox_off'] = [
        '#type' => 'checkbox',
        '#return_value' => 'checkbox_off',
        '#default_value' => 'checkbox_on',
        '#title' => 'checkbox_off',
    ];
    // Checkboxes with a #return_value of '0' are supported.
    $form['zero_checkbox_on'] = [
        '#type' => 'checkbox',
        '#return_value' => '0',
        '#default_value' => '0',
        '#title' => 'zero_checkbox_on',
    ];
    // In that case, passing a #default_value != '0'
    // means that the checkbox is off.
    $form['zero_checkbox_off'] = [
        '#type' => 'checkbox',
        '#return_value' => '0',
        '#default_value' => '1',
        '#title' => 'zero_checkbox_off',
    ];
    $form['submit'] = [
        '#type' => 'submit',
        '#value' => t('Submit'),
    ];
    return $form;
}