ThemeAdminForm.php in Drupal 9
File
core/modules/system/src/Form/ThemeAdminForm.php
View source
<?php
namespace Drupal\system\Form;
use Drupal\Core\Form\ConfigFormBase;
use Drupal\Core\Form\FormStateInterface;
class ThemeAdminForm extends ConfigFormBase {
public function getFormId() {
return 'system_themes_admin_form';
}
protected function getEditableConfigNames() {
return [
'system.theme',
];
}
public function buildForm(array $form, FormStateInterface $form_state, array $theme_options = NULL) {
$form['admin_theme'] = [
'#type' => 'details',
'#title' => $this
->t('Administration theme'),
'#open' => TRUE,
];
$form['admin_theme']['admin_theme'] = [
'#type' => 'select',
'#options' => [
'' => $this
->t('Default theme'),
] + $theme_options,
'#title' => $this
->t('Administration theme'),
'#description' => $this
->t('Choose "Default theme" to always use the same theme as the rest of the site.'),
'#default_value' => $this
->config('system.theme')
->get('admin'),
];
$form['admin_theme']['actions'] = [
'#type' => 'actions',
];
$form['admin_theme']['actions']['submit'] = [
'#type' => 'submit',
'#value' => $this
->t('Save configuration'),
'#button_type' => 'primary',
];
return $form;
}
public function submitForm(array &$form, FormStateInterface $form_state) {
parent::submitForm($form, $form_state);
$this
->config('system.theme')
->set('admin', $form_state
->getValue('admin_theme'))
->save();
}
}