[Interest] Capture delayed QML component creation in C++

[Matt.Bolger at csiro.au]

Hi,

I'm trying to walk the QML Object hierarchy from C++ to do some automatic binding of UI elements to user generated projects. Since the QML elements aren't created until they first become visible I'm trying to find a central signal or virtual function I can use to catch new QML object being (delay) created from the C++ side without having to create custom Component.onCompleted signals all over the place in the QML.

For example below is a simple QML file, note that Label 2 on the second tab isn't created until the user first opens that tab. Looking at the C++ code below that, is there any way I can catch label2 being created from C++ in a general way?

Cheers
Matt

import QtQuick 2.1
import QtQuick.Controls 1.0

TabView {
    width: 300
    height: 300

    Tab {
        title: "tab1"
       Label {
            id: label1
            text: "tab1 text"
            Component.onCompleted: {
                console.log("tab 1 created")
            }
        }
    }

    Tab {
        title: "tab2"
        Label {
            id: label2
            text: "tab2 text"
            Component.onCompleted: {
                console.log("tab 2 created")
            }
        }
    }
}

On the C++ side I have something like:

QQuickView* quickView = new QQuickView(QUrl::fromLocalFile("simple.qml"));
QQuickItem* root = quickView->rootObject();

// With root I can now walk the tree of QObjects and look at properties but this won't include label2
// How can I add something here so I'm informed when an element like label2 is actually created?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.qt-project.org/pipermail/interest/attachments/20141201/65e1d6dd/attachment.html>