class image_attach_views_handler_field_attached_images in Image 6

Field handler to display the attached images on a node.

This is a fake field: it does not add to the view query but runs its own to get data. This is to avoid getting multiple rows for one node when there are multiple attached image nodes.

Inherit from image_handler_field_image_node_image so we get image sizes.

Hierarchy

• class \image_handler_field_image_node_image extends \views_handler_field_node
  • class \image_attach_views_handler_field_attached_images

1 string reference to 'image_attach_views_handler_field_attached_images'

image_attach_views_data_alter in contrib/image_attach/image_attach.views.inc

Implementation of hook_views_data_alter().

File

contrib/image_attach/image_attach_views_handler_field_attached_images.inc, line 12

class image_attach_views_handler_field_attached_images extends image_handler_field_image_node_image {

  /**
   * Constructor to provide additional fields to add.
   *
   * Add the nid field for our query later on.
   */
  function construct() {
    parent::construct();
    $this->additional_fields['image_attach_nid'] = array(
      'table' => 'node',
      'field' => 'nid',
    );
  }

  /**
   * Define default values for options.
   *
   * We inherit the image size option.
   */
  function option_definition() {
    $options = parent::option_definition();
    $options['as_link'] = array(
      'default' => 'none',
    );
    return $options;
  }

  /**
   * Extend the field's basic options with more image specific options.
   *
   * TODO: hide the 'link to node' option?
   */
  function options_form(&$form, &$form_state) {
    parent::options_form($form, $form_state);
    $form['as_link'] = array(
      '#type' => 'select',
      '#title' => t('Link'),
      '#options' => array(
        'none' => t('No link'),
        'node' => t('Node'),
        'image' => t('Image node'),
      ),
      '#default_value' => $this->options['as_link'],
    );
  }

  /**
   * We don't add to the query (see the parent class).
   * Instead, run our own query on pre-render. This is the same approach as CCK
   * multiple fields.
   */
  function pre_render(&$values) {
    $nids = array();
    foreach ($values as $v) {
      if (isset($v->{$this->aliases['image_attach_nid']})) {

        // Make the nid safe.
        $nid = intval($v->{$this->aliases['image_attach_nid']});

        // Use the nid as the key to make the values unique.
        $nids[$nid] = $nid;
      }
    }
    if (count($nids)) {
      $nids_string = implode(',', $nids);
      $result = db_query("SELECT nid, iid FROM {image_attach} WHERE nid IN (" . $nids_string . ") ORDER BY weight");
      while ($data = db_fetch_object($result)) {

        // Store all the attached image nids (iid) keyed by attaching nid.
        $attached_images[$data->nid][] = $data->iid;
      }

      // Place the data into the $values array for each result, beneath a
      // unique key in case this field is on the view several times.
      $this->handler_key = $this->options['id'];
      foreach ($values as $id => $v) {
        if (isset($attached_images[$v->{$this->aliases['image_attach_nid']}])) {
          $values[$id]->image_attach_iids[$this->handler_key] = $attached_images[$v->{$this->aliases['image_attach_nid']}];
        }
      }
    }
  }

  /**
   * Render the field.
   */
  function render($values) {
    if (isset($values->image_attach_iids[$this->handler_key])) {

      // Images need to loaded as full nodes to check node_access() for each of them.
      foreach ($values->image_attach_iids[$this->handler_key] as $iid) {
        $image_nodes[$iid] = node_load($iid);
      }
      $options = array(
        'size' => $this->options['image_derivative'],
        'link' => $this->options['as_link'],
      );
      $output = theme('image_attach_attached_images', $values->{$this->aliases['image_attach_nid']}, $image_nodes, $options);
      return $output;
    }
  }

}

Members

Name	Modifiers	Type	Description	Overrides
image_attach_views_handler_field_attached_images::construct		function	Constructor to provide additional fields to add. Overrides image_handler_field_image_node_image::construct
image_attach_views_handler_field_attached_images::options_form		function	Extend the field's basic options with more image specific options. Overrides image_handler_field_image_node_image::options_form
image_attach_views_handler_field_attached_images::option_definition		function	Define default values for options. Overrides image_handler_field_image_node_image::option_definition
image_attach_views_handler_field_attached_images::pre_render		function	We don't add to the query (see the parent class). Instead, run our own query on pre-render. This is the same approach as CCK multiple fields.
image_attach_views_handler_field_attached_images::render		function	Render the field. Overrides image_handler_field_image_node_image::render
image_handler_field_image_node_image::build_image_display_node		function	Build a pseudo node suitable for image_load() and image_display().
image_handler_field_image_node_image::query		function	query() override to not query this fake field.
image_handler_field_image_node_image::render_html		function	Return image html, using image_load() and image_display().