Change QML object properties from C++.

  • I'm trying to do a simple task as changing a property (text: ) of some QML object from C++ yet I'm failing miserably. Any help appreciated.

    I'm not getting any errors, the window shows up, just the text property doesn't change as (at least I think) it s hould. Is even anything I'm NOT doing wrong here?!!

    What I was trying is this:

    @#include <QGuiApplication>
    #include <QQmlApplicationEngine>
    #include <QQuickView>
    #include <QQuickItem>
    #include <QQmlEngine>
    #include <QQmlComponent>
    #include <QString>

    int main(int argc, char *argv[])
    QGuiApplication app(argc, argv);

    QQmlApplicationEngine engine;
    QQmlComponent component(&engine, QUrl::fromLocalFile&#40;"main.qml"&#41;);
    QObject *object = component.create();
    QString thisString = "Dr. Perry Cox";
    object->setProperty("text", thisString);  //<--- tried  instead of thisString putting "Dr. ..." but nope.
    delete object;
    return app.exec();


    import QtQuick 2.2
    import QtQuick.Window 2.1

    Window {
    visible: true
    width: 360
    height: 360

    MouseArea {
        anchors.fill: parent
        onClicked: {
    Text {
        id: whot
        text: ""
        anchors.centerIn: parent
        font.pixelSize: 20
        color: "green"


  • Hi,
    I think you can try this
    QQmlApplicationEngine engine;
    QQmlContext *context = engine.rootContext();
    QString thisString = "Dr. Perry Cox";
    context->setContextProperty("myText", thisString);

    Hope this help

  • Thank you for the answer, very much appreciated. Someone helped me earlier on another website though. Good luck.

Log in to reply

Looks like your connection to Qt Forum was lost, please wait while we try to reconnect.