Regarding the functions used in BaseExternalWidget.hxx

[Pradeep Kumar]

I am able to build the EWO, which i implemented from begnning looking at the template of BaseExternWIdgte.hxx.

I am able to run the ewo on the panel,

virtual QWidget *widget() const = 0;

This returns the widget and then we need to call show to show the ewo in panel.

i understood the above function.

My queries are , what does the function in BaseExternWidget.hxx does?

What is the functionality?
1) virtual QStringList signalList() const;
2) virtual bool signalInterface(const QString &name, QList &args) const; ?
3) virtual QStringList methodList() const; ?
4) virtual bool method Interface(const QString &name, QVariant::Type &retval,QList &args) const; ?
5) virtual QVariant invokeMethod(const QString &name,QList &values,QString &error); ?
6) void signal(const QString &sigName, const QVariant &value = QVariant()); ?

Will this be relatedto WinCC OA and EWO for communication, i didnt get the above listed 1-6 functionality?

[Gertjan van Schijndel]

These functions are responsible for the communication between the Qt widget and WinCC OA. For details look at the function headers in 'BaseExternWidget.hxx'.