emit signal from script

[wookoon]

If executing a script needs a long time,so I want emit a signal to the application after it finish. I am I need

some suggestions to realize it.

the ways provided by qt doc is likes this:



To emit a signal from script code, you simply invoke the signal function, passing the relevant arguments:
myQObject.somethingChanged("hello");


it need some object,but I just want emit a signal.

[squidge]

Invoke the signal function instead

[JohannesMunk]

Signal/slot always requires objects.

You will need to add a QObject to your scripting environment, with


QScriptEngine* eng ..;
..
MyObject* myobject = new MyObject();
QObject::connect(myobject,SIGNAL(finished()),this, SLOT(calculationFinished()));
eng->globalObject().setProperty("myobject", eng->newQObject(myobject));
eng->evaluate( .. calculation script .. );


That myobject could also hold the required parameters for your calculation..

I assume, you have put the scriptengine into another thread. Because if you call eng->evaluate directly, it won't return until the calculation is finished and you can emit your signal directly afterwards..

Joh

[wookoon]

Signal/slot always requires objects.

You will need to add a QObject to your scripting environment, with


QScriptEngine* eng ..;
..
MyObject* myobject = new MyObject();
QObject::connect(myobject,SIGNAL(finished()),this, SLOT(calculationFinished()));
eng->globalObject().setProperty("myobject", eng->newQObject(myobject));
eng->evaluate( .. calculation script .. );


That myobject could also hold the required parameters for your calculation..

I assume, you have put the scriptengine into another thread. Because if you call eng->evaluate directly, it won't return until the calculation is finished and you can emit your signal directly afterwards..

Joh

how emit the finish() signal? can you talk about it?

[JohannesMunk]

Just write "myobject.finish();" in your script code, as fatjuicymole wrote..

Joh

[wookoon]

I just try,it is done. thank you very much!