ChangeThemeByModule.class.php

<?php
class ChangeThemeByModule extends XCube_ActionFilter
{
	public function postFilter()
	{
		$dirname = null;

		if ( isset($this->mRoot->mContext->mModule->mXoopsModule) and  is_object($this->mRoot->mContext->mModule->mXoopsModule) ) {
			$dirname = $this->mRoot->mContext->mModule->mXoopsModule->get('dirname');
		}

		if ( $dirname == 'message' ) {
			$this->mRoot->mContext->setThemeName('special_theme');
		}
	}
}