[QT 4.8] QTBride system, connect C++ signal with parameter -> Javascript slot

Magnas

Hi Everyone,

I'm working with Qt 4.8 and I have some troubles with the Bridge system.
I read the QtBridge documentation and I easily can connect my simple signal with a javascript function, but i still can't succeed to link my C++ signal with parameters with my javascript function.

For exemple, I have my Object myObject which is link to my javascript code and has a signal @void tagada(QString message);@
How can i send the "message" parameter emited by the signal to my javascript function ? I tried many things like
@
function monSlot(p)
{
alert(p);
}
alert("ok");
myObject.tagada.connect(monSlot(d));
@
or
@
function monSlot(p)
{
alert(p);
}
alert("ok");
myObject.tagada(d).connect(monSlot(d));
@
but it wasn't effective at all...
thanks in advance !

McLion

You need three things:

This is the function registered to and called from JavaScript for bridge functionality:
@
void QT_MainWindow::webGUIbuttonClick(QByteArray LinkID)
{
//your code
}

@

Adding this (QT_MainWindow) object to the WebFrame for bridge functionality

@void QT_MainWindow::populateJavaScriptWindowObject()
{
ui->web->page()->mainFrame()->addToJavaScriptWindowObject("NativeBridge", this);
}
@

And preparing adding objects to JavaScript (bridge from JS to native code)
@connect(ui->web->page()->mainFrame(), SIGNAL(javaScriptWindowObjectCleared()), this, SLOT(populateJavaScriptWindowObject()));@

Now use this in your js:
@NativeBridge.webGUIbuttonClick(linkID)@

Works here with this simple code.

Magnas

Thanks for your reply,

I already have done the 2 firsts things, but what I want to do is to send a QString with my C++ signal to my function written in JS.

I have seen this in the documentation:
@ function myInterestingScriptFunction() { ... }
...
myQObject.somethingChanged.connect(myInterestingScriptFunction);@

and it works when the signal "somethingChanged" send nothing (like this exemple) , but not when this signal send a QString or whatever else...

if somewhere inside a function of myObject I do :
@emit tagada("success")
@

I wanna have a JS function which take this string and do some stuff with it.

McLion

I haven't tried in this direction since I am only needing to bring over arguments from JS to C++, which works in my case.

So, if it basically works to call a function in JS in your case, there might be something wrong with the arguments definition.