theme function not available, not called?

Question

I am extending a module, I want to create a new theme function for the output but it somehow is not recognized. I know of theme registry and rebuild it (manually and via devel module)

The issue is tracked down to

function cmis_browser_content_properties() {
    $output = theme('cmis_browser_content_properties', array('cmis_object' => $object));
    debug($output, 'output');
    return $output;
}


function theme_cmis_browser_content_properties($variables) {
  // do sth
  $output = 'sth';
  return $output;
}

When I create a new function by copying the existing to

function theme_cmis_browser_content_propertiesnewtest($variables) 

and call it in above module code. There is no output anymore, debug says: ''

$output = theme('cmis_browser_content_propertiesnewtest', array('cmis_object' => $object));

Please enlighten me!

just fyi the cmis module is a connector to alfresco document repository via CMIS http://drupal.org/project/cmis

just seeing similar questions suggested. Will see if one fits, but send this anyaway.

Answer 1

From the looks of it you've forgotten to register your theme function with the system using hook_theme()

function MYMODULE_theme($existing, $type, $theme, $path) {
  return array(
    'cmis_browser_content_propertiesnewtest' => array(
      'variables' => array('cmis_object' => NULL)
    )
  );
}

After you clear the caches your theme function should be registered with the system and start working as expected.