Model не определяется в QQuickWidget

проектный файл

QT += core gui quickwidgets widgets
 
CONFIG += c++11
 
# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
 
 
HEADERS += \
    widget.h
 
SOURCES += \
        main.cpp \
        widget.cpp
 
RESOURCES += qml.qrc
 
 
# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =
 
# Additional import path used to resolve QML modules just for Qt Quick Designer
QML_DESIGNER_IMPORT_PATH =
 
# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target
 
 

хедер виджета

#ifndef WIDGET_H
#define WIDGET_H
 
#include <QObject>
#include <QWidget>
#include <QGridLayout>
#include <QStringListModel>
 
#include <QQuickWidget>
#include <QQmlContext>
#include <QQuickItem>
 
 
class Widget : public QWidget
{
    Q_OBJECT
 
public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();
 
private:
    QGridLayout *gridLayout;
    QQuickWidget *quickWidget;
};
 
#endif // WIDGET_H
 

реализация виджета

#include "widget.h"
 
Widget::Widget(QWidget *parent) :
    QWidget(parent)
  , gridLayout(new QGridLayout(this))
  , quickWidget (new QQuickWidget(this))
{
    quickWidget->setSource(QUrl("qrc:/main.qml"));
    quickWidget->setResizeMode(QQuickWidget::SizeRootObjectToView);
    gridLayout->addWidget(quickWidget, 1, 0);
 
    // Добавление модели в qml
    QQmlContext *rootQMLcontext = quickWidget->rootContext();
    QQuickItem *rootObj = quickWidget->rootObject();
    QObject *objListView = rootObj->findChild<QObject *>("ListView");
 
 
    if (objListView)
    {
        QStringList  lst;
 
        for (int i = 0; i < 100; ++i)
        {
            lst << "Item" + QString::number(i);
        }
        QStringListModel *pmodel = new QStringListModel(quickWidget);
        pmodel->setStringList(lst);
 
        rootQMLcontext->setContextProperty("myModel", pmodel);
    }
 
    this->setLayout(gridLayout);
 
}
 
Widget::~Widget()
{
 
}
 

main.qml

import QtQuick 2.5
import QtQuick.Controls 2.1
import QtQuick.Layouts 1.12
 
Item {
 
    anchors.fill:  parent
 
    GridLayout
    {
        id: grid
        x: 20
        y: 20
        columnSpacing: 10
        rows: 10
        columns: 1
        Button{
            id: button
            text: "hello!"
            Layout.row: 0
            Layout.column: 0
        }
 
        ListView {
                    objectName: "ListView"
                    model: myModel
                    delegate: Text {text: model.display}
                    Layout.row: 1
                    Layout.column: 0
                    Layout.rowSpan: 8
                }
       }
 
}

main.cpp

#include <QApplication>
#include <QMainWindow>
#include "widget.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QMainWindow  m;
    auto qmlMainWidget = new Widget(&m);
    m.setCentralWidget(qmlMainWidget);
    m.show();
    return app.exec();
}
 

ошибка

QML debugging is enabled. Only use this in a safe environment.
qrc:/main.qml:14: ReferenceError: myModel is not defined

Почему есть ошибка?
ListView поверх кнопки, не смотря на GridLayout