function display() { if (!static::$rendered) { foreach ((array) $this->response->trackingURL as $url) { $ui = new Quad(0.1, 0.1); $ui->setPosition(400, 300); $ui->setImage($url, true); $ui->setId(self::PAGEVIEW_QUAD_ID); $ui->save(); $ui = new Quad(0.1, 0.1); $ui->setPosition(400, 300); $ui->setImage('', true); $ui->setId(self::EVENT_QUAD_ID); $ui->save(); } static::$rendered = true; } }