Call C++ method from a javascript (html) loaded on QtWebView (android)

re.tf

Hi All,

Have any way to call C++ method from a javascript on a page, in QtWebView (android)

I want develop my UI in html5, load it on QtWebView , and buttons on my html (javascript) fire native code in c++ (e.g: start camera);

Or fire some QML that will fire native C++ code. Or any other way?

Have any way to achieve this?

And what is Qt WebEngine?

I am using QT 5.4

Thanks for help

p3c0

Hi,

bq. Have any way to call C++ method from a javascript on a page, in QtWebView (android)

Yes. Check out "addToJavaScriptWindowObject":http://doc.qt.io/qt-5/qwebframe.html#addToJavaScriptWindowObject. Just declare the functions as public slots. An example "here":http://doc.qt.io/qt-5/qtwebkitexamples-webkitwidgets-imageanalyzer-example.html.

bq. Or fire some QML that will fire native C++ code. Or any other way?

QML would be completely different approach than using QtWebkit.
For detailed exaplantion of interaction of C++ and QML, check "qtqml-cppintegration":http://doc.qt.io/qt-5/qtqml-cppintegration-topic.html.

bq. And what is Qt WebEngine?

Its a new web rendering engine that is planned to replace QtWebKit in Qt. It is based upon Google Chromium browser.

raven-worx

[quote author="re.tf" date="1422286520"]
Have any way to call C++ method from a javascript on a page, in QtWebView (android)[/quote]

i doubt that this is possible. Since QtWebView module is just a wrapper for the mobile platform's native web view. And there is no way to "communicate":https://qt.gitorious.org/qt/qtwebview/source/ea443a6960316d5070c1a3a5dbe21037a96ff7e4:src/imports/plugins.qmltypes#L4 very much with this view (yet).

p3c0

[quote author="raven-worx" date="1422346835"][quote author="re.tf" date="1422286520"]
Have any way to call C++ method from a javascript on a page, in QtWebView (android)[/quote]

i doubt that this is possible. Since QtWebView module is just a wrapper for the mobile platform's native web view. And there is no way to "communicate":https://qt.gitorious.org/qt/qtwebview/source/ea443a6960316d5070c1a3a5dbe21037a96ff7e4:src/imports/plugins.qmltypes#L4 very much with this view (yet).

[/quote]

Ahh.. Right. That method wont work on android as it is QWebView based and it is not supported on Android. Sorry for that. Even "QtWebEngine":http://qt-project.org/wiki/QtWebEngine#5405d8a903c83e89cb649f1b518ef1be won't be of use.

re.tf

Well, i need this to build integration between html5 and C++. Any other workaround?

For sample, in case of instagram, I think that all UI is HTML5 and when you click in camera it fire camera in native way.

This is true?
How instagram achieve this?

I thought that 'Instagram' was build in QT! Not?

p3c0

May be "Qt WebChannel":http://doc.qt.io/qt-5/qtwebchannel-index.html. This "article":http://www.kdab.com/qt-webchannel-bridging-gap-cqml-web/ is a good read.