public function RotateImageEffect::buildConfigurationForm in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/image/src/Plugin/ImageEffect/RotateImageEffect.php \Drupal\image\Plugin\ImageEffect\RotateImageEffect::buildConfigurationForm()
2. 10 core/modules/image/src/Plugin/ImageEffect/RotateImageEffect.php \Drupal\image\Plugin\ImageEffect\RotateImageEffect::buildConfigurationForm()

Form constructor.

Plugin forms are embedded in other forms. In order to know where the plugin form is located in the parent form, #parents and #array_parents must be known, but these are not available during the initial build phase. In order to have these properties available when building the plugin form's elements, let this method return a form element that has a #process callback and build the rest of the form in the callback. By the time the callback is executed, the element's #parents and #array_parents properties will have been set by the form API. For more documentation on #parents and #array_parents, see \Drupal\Core\Render\Element\FormElement.

Parameters

array $form: An associative array containing the initial structure of the plugin form.

\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form. Calling code should pass on a subform state created through \Drupal\Core\Form\SubformState::createForSubform().

Return value

array The form structure.

Overrides PluginFormInterface::buildConfigurationForm

File

core/modules/image/src/Plugin/ImageEffect/RotateImageEffect.php, line 82

Class

RotateImageEffect

Rotates an image resource.

Namespace

Drupal\image\Plugin\ImageEffect

Code

public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
  $form['degrees'] = [
    '#type' => 'number',
    '#default_value' => $this->configuration['degrees'],
    '#title' => t('Rotation angle'),
    '#description' => t('The number of degrees the image should be rotated. Positive numbers are clockwise, negative are counter-clockwise.'),
    '#field_suffix' => '°',
    '#required' => TRUE,
  ];
  $form['bgcolor'] = [
    '#type' => 'textfield',
    '#default_value' => $this->configuration['bgcolor'],
    '#title' => t('Background color'),
    '#description' => t('The background color to use for exposed areas of the image. Use web-style hex colors (#FFFFFF for white, #000000 for black). Leave blank for transparency on image types that support it.'),
    '#size' => 7,
    '#maxlength' => 7,
  ];
  $form['random'] = [
    '#type' => 'checkbox',
    '#default_value' => $this->configuration['random'],
    '#title' => t('Randomize'),
    '#description' => t('Randomize the rotation angle for each image. The angle specified above is used as a maximum.'),
  ];
  return $form;
}