Right now, I'm adding an event tracking code to the file includes/template_thumbnails.php. Line 30-31 look like this:
$pagetitlee = get_the_title(); $output .= "<a class='yarpp-thumbnail' href='" . get_permalink() . "' title='" . the_title_attribute('echo=0') . "' onClick='_gaq.push(['_trackEvent', 'YARPP', 'Single Page thumb $pagetitlee', 'Clicked',, false]);'>" . "\n";
It works well, but the disadvantage is that with the next plugin update I have to add it again.
Is there a better way of doing this?