QtWebView always fullscreen

    webview = new QQuickWidget();
    QGridLayout *layout = new QGridLayout;
    layout->addWidget(webview);
    webview->setSource(QUrl("qrc:/webview.qml"));
    webview->setResizeMode(QQuickWidget::SizeViewToRootObject);
    ui->groupBox->setLayout(layout);
    webview->show();

import QtQuick 2.2
import QtQuick.Controls 1.1
import QtWebView 1.0
import QtQuick.Layouts 1.1

Rectangle {
    width: 2000
    height: 2000
    WebView {
        anchors.fill: parent
        id: webView
        url: "http://qt.io"
    }
}