QQMLComponent not showing up in main Window

[abanksdev]

Hi there, I am following the documentation to call a QML component from c++ and display it in the main window: http://doc.qt.io/qt-5/qtqml-cppintegration-interactqmlfromcpp.html

In main.cpp i have the following:

QQmlApplicationEngine engine;
    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));

    QQmlComponent component(&engine,
            QUrl::fromLocalFile(":/Circle2.qml"));
    QObject *object = component.create();

The path ":/Circle2.qml" as opposed to "Circle2.qml" or "qrc:/Circle2.qml" is the only path that does not generate the error "QQmlComponent: Component is not ready" as described in this post: https://forum.qt.io/topic/54517/solved-qqmlcomponent-component-is-not-ready/9

HOWEVER, even without the error, the Circle component does not show up in my main window.

my main.qml:

import QtQuick 2.9
import QtQuick.Window 2.2

Window {
    visible: true
    width: 640
    height: 300
    title: qsTr("Hello World")
    color: "green"


    /*Circle{
        //width: parent.width/16
        //height: parent.height/8
        anchors.centerIn: parent
    }*/

}

and my Circle2.qml file:

import QtQuick 2.4

Rectangle{
        width: 50
        height: 50
         color: "darkblue"
         //border.color: "blue"
         border.width: 0
         radius: width*0.5

}

Does anyone know why my circle isnt displaying anywhere?

[abanksdev]

This is all I see when i run it:

[Kishore Ravikumar]

Hi, did you get the answer for it. Did you resolve it?

[jeremy_k]

The C++ code snippet in OP is missing a call to set the parent item of the instantiated component. Without that, it's not part of a scene graph.

From https://doc.qt.io/qt-6/qqmlcomponent.html

QQmlComponent component(engine, QUrl::fromLocalFile("MyItem.qml"));
QQuickItem *childItem = qobject_cast<QQuickItem*>(component.create());
childItem->setParentItem(this);