Functions and implementation of Views exposed range selector filter

views_tweaks.info

name = Views Tweaks
description = Misc tweaks to Views
core = 6.x

dependencies[] = views

views_tweaks.module

<?php
/**
 * Implementation of hook_form_alter().
 */
function views_tweaks_form_alter(&$form, $form_state, $form_id) {
  // Load up a $view object like we would expect to work with
  if (isset($form['#parameters'][1]['view'])) {
    $view = $form['#parameters'][1]['view'];
  }
  switch ($form_id) {
    case 'views_exposed_form':
      if ($view->name == 'products_wall') {
        views_tweaks_range_to_select('field_price_value', array(
          '0,999' => 'Less than $1,000',
          '1000,1999' => '$1,000–$1,999',
          '2000,3999' => '$2,000–$3,999',
          '4000,6999' => '$4,000–$6,999',
          '7000,999999' => '$7,000 plus',
        ), $form, $form_state);
      }
      break;
  }
}

views_tweaks2.module

<?php
/**
 * Turn a range field into a select dropdown. This assumes that the $options array
 * is going to be something like: array('5,9' => '5 to 9 lbs') where the index is
 * a comma delimited string of the min/max values. 
 * Pass in $optional = TRUE if you want there to be an <any> value at the top of
 * the select dropdown. Defaults to TRUE.
 */
function views_tweaks_range_to_select($field, $options, &$form, &$form_state, $optional = TRUE) {
  $form[$field]['#type'] = 'select';
  if ($optional) {
    $options = array_merge(array('All' => '<Any>'), $options);
  }
  $form[$field]['#options'] = $options;
  unset($form[$field]['min']);
  unset($form[$field]['max']);
  $f = $form_state['input'][$field];
  $f ? $form[$field]['#value'] = $f : true;
  $form[$field]['#element_validate'] = array('views_tweaks_range_validate');
}

views_tweaks3.module

<?php
/**
 * Turn values created by range_to_select back into ranges so that Views can process
 * the request. This assumes that if the value passed in is 'All' the min/max array
 * should be set to array('min' => '', 'max' => '')
 */
function views_tweaks_range_validate($element, &$form_state) {
  if (($v = $element['#post'][$element['#name']])) {
    if ($v == 'All') {
      $min = $max = '';
    }
    else {
      list($min, $max) = explode(',', $v);
    }
    $form_state['input'][$element['#name']] = array(
      'min' => $min,
      'max' => $max,
    );
    $form_state['values'][$element['#name']] = array(
      'min' => $min,
      'max' => $max,
    );
  }
}