QQmlExpression Class

Detailed Description

For example, given a file main.qml like this:

 import QtQuick 2.0

 Item {
     width: 200; height: 200
 }

The following code evaluates a JavaScript expression in the context of the above QML:

 QQmlEngine *engine = new QQmlEngine;
 QQmlComponent component(engine, QUrl::fromLocalFile("main.qml"));

 QObject *myObject = component.create();
 QQmlExpression *expr = new QQmlExpression(engine->rootContext(), myObject, "width * 2");
 int result = expr->evaluate().toInt();  // result = 400