Adding a new component definition in a class method to the scene

[silex92]

Hi,

there's a class woman. It is registered in QML system.
main.qml contains the object definition with a signal handler.
The handler calls c++ method which should add a new button into the scene.

I need to find the root object - the window in the main.qml to become a parent for the new button.
How do you find a root object?

Here's the method:
@
extern QQuickWindow *window;
void woman::add_hip()
{
setProperty("hip", 87);

QQmlEngine *engine = QtQml::qmlEngine(this);

// 1. Define a QML component.
QQmlComponent *readHipComp = new QQmlComponent(engine);
readHipComp->setData("import QtQuick.Controls 1.2\n\
                     Button {\n\
                         anchors.top: addHipBtn.top\n\
                         anchors.left: addHipBtn.left\n\
                         anchors.margins: 3\n\
                         text: \"Hip value\"\n\
                         onClicked: {\n\
                             msgDlg.text = woman.hip\n\
                             msgDlg.open()\n\
                         }\
                     }", QUrl());
// 2. Create the component instance.
QQuickItem *readHipBtn = qobject_cast<QQuickItem *>(readHipComp->create());
// 3. Add the instance to the scene.
readHipBtn->setParentItem(qobject_cast<QQuickItem *>(engine->rootContext()->contextObject()));

readHipBtn->setParentItem(window->contentItem());
}
@

throws
<Unknown File>: ReferenceError: addHipBtn is not defined
<Unknown File>: ReferenceError: addHipBtn is not defined.

It is added to GUI but it does not see other main.qml objects.

[p3c0]

Hi,

If I'm not mistaken you can pass the engine object to the class and then find the root object there.
@
//main.qml
Window {
visible: true
width: 640
height: 480
title: qsTr("Hello World")
}

//main.cpp
QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:///main.qml")));
QObject *rootObject= engine.rootObjects().first();
//rootObject will point to Window
@

In your case you can either pass rootObject to your class or pass engine to the class so that you can find root element there.