How to take Screenshot of QML application without QQuickView

Question

I want to grab screen of my QML application. But my root QML object is ApplicationWindow, so I can\'t use QQuickView to show it. Instead I have to use

Answer 1

You can use the QObject *obj, QEvent *ev to take screenshot as well.

Main.cpp

QObject *objekt = engine.rootObjects().first();
classObj->root_object = objekt;
app.installEventFilter(classObj);

classObj.h

QObject *root_object = nullptr;
bool eventFilter(QObject *obj, QEvent *ev);

classObj.cpp

bool classObj::eventFilter(QObject *obj, QEvent *ev)
{
    QString dateInterval = QString::number(QDateTime::currentSecsSinceEpoch());

    QDir dir("Screenshots");
    if(!dir.exists())
        dir.mkpath(".");

    if(ev->type() == QEvent::MouseButtonPress) {
        QQuickWindow *window   = qobject_cast(root_object);
        window->grabWindow().save("Screenshots/Screenshot-"+dateInterval+".png");
    }
    return QObject::eventFilter(obj, ev);
}

this will take screenshot whenever some event happenes.