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   1  <?php
   2  // $Id: image_handler_relationship_node_image_file.inc,v 1.1 2009/05/01 22:29:47 sun Exp $
   3  
   4  /**
   5   * @file
   6   * Views relationship handler for image size filter.
   7   */
   8  
   9  class image_handler_relationship_node_image_file extends views_handler_relationship {
  10  
  11    function option_definition() {
  12      $options = parent::option_definition();
  13      $options['image_size'] = array('default' => IMAGE_THUMBNAIL);
  14      return $options;
  15    }
  16  
  17    function options_form(&$form, &$form_state) {
  18      parent::options_form($form, $form_state);
  19  
  20      $image_size_options = array();
  21      foreach (image_get_sizes() as $key => $size) {
  22        $image_size_options[$key] = $size['label'];
  23      }
  24  
  25      $form['image_size'] = array(
  26        '#type' => 'select',
  27        '#title' => t('Image sizes'),
  28        '#options' => $image_size_options,
  29        '#default_value' => $this->options['image_size'],
  30        '#multiple' => TRUE,
  31        '#description' => t('Which image sizes to join on. You can select none (to include all sizes), one, or multiple; Every size will introduce a new row. Example: If the result are 5 image nodes and you selected 2 sizes; The result will be 10 rows. There is no fallback; if a size does not exist (because the original is smaller) then no data will be obtained.'),
  32      );
  33    }
  34  
  35    function ensure_my_table() {
  36      if (!isset($this->table_alias)) {
  37        $join = $this->get_join();
  38  
  39        // Adjust the join for the selected image size.
  40        if (!empty($this->options['image_size'])) {
  41          $join->extra[] = array(
  42            'field' => 'image_size',
  43            'value' => $this->options['image_size'],
  44          );
  45        }
  46        $this->table_alias = $this->query->add_table($this->table, $this->relationship, $join);
  47      }
  48      return $this->table_alias;
  49    }
  50  }
  51