public function executeGraphPNG(sfWebRequest $request)
{
$etva_node = EtvaNodePeer::retrieveByPK($request->getParameter('id'));
$graph_start = $request->getParameter('graph_start');
$graph_end = $request->getParameter('graph_end');
$nodeload_rra = new NodeLoadRRA($etva_node->getUuid());
$title_i18n = sprintf("%s :: %s", $etva_node->getName(), $this->getContext()->getI18N()->__(NodeLoadRRA::getName()));
$this->getResponse()->setContentType('image/png');
$this->getResponse()->setHttpHeader('Content-Type', 'image/png', TRUE);
$this->getResponse()->sendHttpHeaders();
$this->getResponse()->setContent(print $nodeload_rra->getGraphImg($title_i18n, $graph_start, $graph_end));
return sfView::HEADER_ONLY;
}
