use the plugin and QT script at the same time

Can I use the plugin function and the QT script at the same program? That means to build a plugin DLL and load by plugin loader then I can use write a easy script to drive that plugin.

I try to implement this idea into my program. The plugin load successfully but I can't drive by the script. Does anybody uses this idea in your program? Any example for me to study?
:confused:

My plugin interface

Code:

---

class TaInterface
{
public:
    virtual ~TaInterface() {}
    virtual QString pluginName() = 0;
 
public slots:
    virtual bool initialize(const QStringList &arguments, QString *errorString) = 0;
    virtual QString function() = 0;

---

Load plugin and set to script engine

Code:

---

void MainWindow::loadPlugins()
{
    engine = new QScriptEngine(this);
 
    pluginsDir = QDir(qApp->applicationDirPath());
 
    if (pluginsDir.dirName().toLower() == "debug" || pluginsDir.dirName().toLower() == "release")
        pluginsDir.cdUp();
 
    pluginsDir.cd("plugins");
 
    foreach (QString fileName, pluginsDir.entryList(QDir::Files))
    {
        QPluginLoader loader(pluginsDir.absoluteFilePath(fileName));
        QObject *plugin = loader.instance();
        if (plugin)
        {
            pluginFileNames += fileName;
            Interface *ta = qobject_cast<Interface *>(plugin);
 
            QScriptValue TaToScript = engine->newQObject(plugin);
            engine->globalObject().setProperty(ta->pluginName(), TaToScript);
 
        }
 
    }
}

---

DLL plugin

Code:

---

class AD  : public QObject, public TaInterface
{
    Q_OBJECT
    Q_INTERFACES(TaInterface)
 
public:
    ~AD();
    bool initialize(const QStringList &arguments, QString *errorString);
    QString pluginName();
 
public slots:
    QString function();
 
};

---

So what exactly doesn't work?

The script file can't find the function which listed in the public slot in the interface.
I am new to the script. Can you please guide me what's wrong?

Code:

---

var functionName = AD.function();
print(functionName);

---

does anybody have idea? I still can't figure out the way to use QT script to drive a plugin function.

Thanks for your attention!

Does the AD object exist? Please provide a print of its properties (if you don't know how, search the web for printing properties of javascript objects).

I think AD object is exist. After I load the AD plugin, I can use

Code:

---

QObject *plugin = loader.instance();

---

to get he QObject correctly. And I can use

Code:

---

Interface *ta = qobject_cast<Interface *>(plugin);

---

to set the QObject to correct class.
The ta->pluginName() is functional. However, when I assign this QObject to the script engine, the debugger can't recognize this object. I also do a comparison with QPushButton. If I sent the QPushButton to the script engine. The debugger shows every properties. Please find the detail pic in attached.
I don't know why the my plugin properties can't work well after I send the plugin object to script engine but the QPushButton works just fine?

Quote:

---

Originally Posted by SamT

I think AD object is exist.

---

I mean does it exist in the script context. Looks like it does (based on the pics you provide) and it seems a function() function is there, so everything should work. What's the problem then?

Finally I got my script working.

I modify the implement of function()

Code:

---

void AD::function()
{
    qDebug() << "This is a test";
}

---

and the script file

Code:

---

AD.function();

---

after runt the script, I could find my qDebug() window shows

Code:

---

This is a test
nan

---

The problem might go with the syntax error of my script file. Thanks for your help!