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function image_field_settings_form in Drupal 7

Implements hook_field_settings_form().

File

modules/image/image.field.inc, line 39
Implement an image field, based on the file module's file field.

Code

function image_field_settings_form($field, $instance) {
  $defaults = field_info_field_settings($field['type']);
  $settings = array_merge($defaults, $field['settings']);
  $scheme_options = array();
  foreach (file_get_stream_wrappers(STREAM_WRAPPERS_WRITE_VISIBLE) as $scheme => $stream_wrapper) {
    $scheme_options[$scheme] = $stream_wrapper['name'];
  }
  $form['uri_scheme'] = array(
    '#type' => 'radios',
    '#title' => t('Upload destination'),
    '#options' => $scheme_options,
    '#default_value' => $settings['uri_scheme'],
    '#description' => t('Select where the final files should be stored. Private file storage has significantly more overhead than public files, but allows restricted access to files within this field.'),
  );

  // When the user sets the scheme on the UI, even for the first time, it's
  // updating a field because fields are created on the "Manage fields"
  // page. So image_field_update_field() can handle this change.
  $form['default_image'] = array(
    '#title' => t('Default image'),
    '#type' => 'managed_file',
    '#description' => t('If no image is uploaded, this image will be shown on display.'),
    '#default_value' => $field['settings']['default_image'],
    '#upload_location' => $settings['uri_scheme'] . '://default_images/',
  );
  return $form;
}