Reference to WebView from C++

[Adilek]

Hi.

I make little application using QML and it contains WebView component.

I want to get the reference to QML object WebView from C++.

My QML is like this:
@
WebView {
id:webView
objectName: "adil1234"

        preferredWidth: flick.width
        preferredHeight: flick.height
        renderingEnabled:true
        settings.pluginsEnabled: true
        smooth: true
        contentsScale:1
        pressGrabTime:10

        focus:true
        anchors {
            left:parent.left
            right:parent.right
        }

        onUrlChanged: {
            flick.contentY = 0


        }
    }
}

@

I get the reference to this object in C++ by such method:
@
QUrl source("qrc:res/qml/qmlfile.qml");
QApplication app(argc, argv);

app.setApplicationName("salam");

QDeclarativeView view;

view.setResizeMode(QDeclarativeView::SizeRootObjectToView);
QObject::connect(view.engine(), SIGNAL(quit()), &app, SLOT(quit()));

view.setSource(source);
view.show();

QObject *object = view.rootObject();


QObject *rect = object->findChild<QObject*>("adil1234");

@

The rect is the reference to this object. It's OK but it's type is QObject. Now I need to call webkit related functions. So I write
@
QGraphicsWebView* adil = (QGraphicsWebView*)rect;
@

or

@
QWebView* adil = (QWebView*)rect;
@

When I call any function of adil for example adil->url() application crashes. I think such casting is not OK. In this situation how to get the reference of my webview component and work with it like QWebView.

Thanks.

[thisisbhaskar]

Always do qobject_cast when you do casting a QObject derived class.

@QObject rect = object->findChild<QObject>("adil1234");@

now I could see that url is a property of WebView and you should be able to access url property with below code

@rect->setProperty("url",QVariant("urlpath"));
QVariant urlpath = rect->property("url");
QString urlstring = urlpath.toString();
@

Try this out and let us know if this works.

[Adilek]

Thanks you for your attention.
For now my purpose is to get the selected text of WebView so to call rect->selectedText();. In this case rect is QObject and it's neat that it has no selectedText() method. QWebView has selectedText() method. How to get the reference of rect as QWebView (or QGraphicsWebView)?

[thisisbhaskar]

I doubt you can do that...

When you execute below code.. dose adil have a valid pointer ( other than zero ) ? My guess is it will be zero
@QObject rect = object->findChild<QObject>("adil1234");
QWebView* adil = qobject_cast<QWebView>(rect);@

You can not call selectedText() on WebView because WebView does not have a method with that name. Suppose if it has, you can call it with

@QMetaObject::invokeMethod(rect,"selectedText,parameters)@

[djgtram]

That's exactly the problem, Vijay.

I need to call back my C++ code from QML in order to set up a couple of things in the WebView (like setting the background to avoid the background transparency bug on Symbian, disabling the context menu and similar). I do it the usual way, passing the WebView id as an argument from the Component.onCompleted of the WebView in QML.

C++ accepts and tries to cast it the usual way (the way that works with many other objects, WebView seems to be the exception):

@void xxx::setup(QObject* browser) {
QWebView* webBrowser = qobject_cast<QWebView*>(browser);
qDebug() << browser;
qDebug() << webBrowser;
}@

While browser is a QDeclarativeWebView all right, it can't be cast to a QWebView, webBrowser will be a null QObject instead. Do you have any suggestion?