One QML two File Html inside: how can I call javascript functions inside its from c++

[elicat]

hello,
INTRODUCTION PROJECT

• in my project i cannot use websocket;
• I have one file QML with rectangle area that connetc at webengine
• inside rectangle area there is a form HTML, so i have FORM1 and FORM2
• I can call a C ++ function from an html button passing the values of all the elements of a FORM1 and FORM2.

How can I call a javacript function (for example functionform1 () or functionform2 ()) from C ++ ????

This is two areas whith two file html

Rectangle {
	id: boxLeft
	EngineIndexHtml {
		id: oldBeardedMan
		WebChannel.id: "wiseMan"
	}
	WebEngineView {
		id: viewTestEngine
		anchors.fill: parent
		url: "/html/form1.html"
		webChannel: channel
	}
	WebChannel {
		id: channel
		registeredObjects: [oldBeardedMan]
	}                        
}
Rectangle {
	id: boxRight
	EngineIndexHtml {
		id: idPage2
		WebChannel.id: "ChannelPage2"
	}
	WebEngineView {
		id: viewTestEnginePage2
		anchors.fill: parent
		url: "/html/form2.html"
		webChannel: channelPage2
	}
	WebChannel {
		id: channelPage2
		registeredObjects: [idPage2]
	}

This is one connect webengine in HTML (form1)

        window.onload = function () {
            new QWebChannel(qt.webChannelTransport, function (channel) {
                webobj = channel.objects.wiseMan;
                window.foo = webobj;
            });
        }

So i can call a function C++ from html file. For example :

foo.retriveElementValue(array_parameter);