'center', 'ypos' => 'center', ); $data = array_merge($defaults, (array) $data); $description1 = t('Enter an offset in pixels (e.g. 10, 10px), a percentage (e.g. 25%), or one of the keywords: left, center, or right wih an optional offset (e.g. center, right - 10%).'); $description2 = t('Enter an offset in pixels (e.g. 10, 10px), a percentage (e.g. 25%), or one of the keywords: top, center, or bottom wih an optional offset (e.g. center, bottom - 10%).'); $form = array( 'xpos' => array( '#type' => 'textfield', '#title' => t('X offset'), '#default_value' => $data['xpos'], '#size' => 6, '#description' => $description1, '#element_validate' => array('imagecache_actions_validate_number'), ), 'ypos' => array( '#type' => 'textfield', '#title' => t('Y offset'), '#default_value' => $data['ypos'], '#size' => 6, '#description' => $description2, '#element_validate' => array('imagecache_actions_validate_number'), ), ); return $form; } /** * Form element validator that checks for a valid number. * * @param array $element * @param $form_state */ function imagecache_actions_validate_number(&$element, &$form_state) { if (empty($element['#value'])) { form_set_value($element, 0, $form_state); } } /** * Form element validator that checks a transparency percentage value. * * @param array $element */ function imagecache_actions_validate_alpha(&$element/*, &$form_status*/) { if (!is_numeric($element['#value']) || $element['#value'] < 1 || $element['#value'] > 100) { form_set_error(join('][', $element['#parents']), t('Opacity must be a number between 1 and 100.')); } }