src_script_qjsengine.cpp

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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
QJSEngine myEngine;
QJSValue three = myEngine.evaluate("1 + 2");
 
 
QJSValue fun = myEngine.evaluate("(function(a, b) { return a + b; })");
QJSValueList args;
args << 1 << 2;
QJSValue threeAgain = fun.call(args);
 
 
QString fileName = "helloworld.qs";
QFile scriptFile(fileName);
if (!scriptFile.open(QIODevice::ReadOnly))
    // handle error
QTextStream stream(&scriptFile);
QString contents = stream.readAll();
scriptFile.close();
myEngine.evaluate(contents, fileName);
 
 
myEngine.globalObject().setProperty("myNumber", 123);
...
QJSValue myNumberPlusOne = myEngine.evaluate("myNumber + 1");
 
 
QJSValue result = myEngine.evaluate(...);
if (result.isError())
    qDebug()
            << "Uncaught exception at line"
            << result.property("lineNumber").toInt()
            << ":" << result.toString();
 
 
QPushButton *button = new QPushButton;
QJSValue scriptButton = myEngine.newQObject(button);
myEngine.globalObject().setProperty("button", scriptButton);
 
myEngine.evaluate("button.checkable = true");
 
qDebug() << scriptButton.property("checkable").toBool();
scriptButton.property("show").call(); // call the show() slot
 
 
QJSEngine engine;
 
QObject *myQObject = new QObject();
myQObject->setProperty("dynamicProperty", 3);
 
QJSValue myScriptQObject = engine.newQObject(myQObject);
engine.globalObject().setProperty("myObject", myScriptQObject);
 
qDebug() << engine.evaluate("myObject.dynamicProperty").toInt();
 
 
class MyObject : public QObject
{
    Q_OBJECT
 
public:
    Q_INVOKABLE MyObject() {}
};
 
QJSValue jsMetaObject = engine.newQMetaObject(&MyObject::staticMetaObject);
engine.globalObject().setProperty("MyObject", jsMetaObject);
 
engine.evaluate("var myObject = new MyObject()");