QDomNodeList params = effect.elementsByTagName("parameter");
for (int i = 0; i < params.count(); i++) {
QDomElement e = params.item(i).toElement();
QDomNodeList params = effect.elementsByTagName("parameter");
for (int i = 0; i < params.count(); i++) {
QDomElement e = params.item(i).toElement();