[webkit-qt] QML integration question

[Felipe Crochik]

I just created a simple project to illustrate the bug I can't fix on
harmattan (crash after you switch to the task manager). Have a look at
http://www.crochik.com/gapp/webviewcrash.zip

On Fri, Nov 11, 2011 at 5:45 AM, Harri Pasanen <grego at mpaja.com> wrote:

> **
>
> I tried this approach and indeed it was very straight forward.
>
> I just refactored QDeclarativeWebView to my own and registered the type.
>
>
> I needed to intercept the linkClicked(QUrl) signal and that worked fine
> for the desktop.
>
>
> However, for some reason on harmattan N9 device my own webview does not
> render, everything is black. I went back so that only change I did was
> renaming the QDeclarativeWebView, but even then it does not render other
> than black. Any idea what might cause this?
>
>
> The source files I used were from QtSDK:
>
>
> QtSDK/QtSources/4.7.4/src/3rdparty/webkit/WebKit/qt/declarative/qdeclarativewebview_p.h
>
>
> QtSDK/QtSources/4.7.4/src/3rdparty/webkit/WebKit/qt/declarative/qdeclarativewebview.cpp
>
>
> Changing the import in qml makes it work/not work.
>
> Between the two runs I don't see any difference in Application Output
> pane, just usual:
>
>
> Remote process started.
>
> Using the meego graphics system
>
> loaded the Generic plugin
>
> loaded the grue plugin
>
> Loaded the MeeGo sensor plugin
>
> Setting data rate 0 Hz (interval 0 ms) for "meego.orientationsensor"
>
> Setting data rate 0 Hz (interval 0 ms) for "meego.orientationsensor"
>
> Found SGX/MBX driver, enabling FullClearOnEveryFrame
>
> Found v1.4 driver, enabling brokenTexSubImage
>
> Successfully resolved MeeGo graphics system:
> /usr/lib/qt4/plugins/graphicssystems/libqmeegographicssystem.so
>
>
> MeegoGraphics: found EGL_NOK_image_shared
>
> MeegoGraphics: found EGL_KHR_lock_surface2
>
> MeegoGraphics: found EGL_KHR_fence_sync
>
> X Error: BadDamage (invalid Damage parameter) 153
>
> Extension: 146 (Uknown extension)
>
> Minor opcode: 2 (Unknown request)
>
> Resource id: 0x29
>
> hijackWindow() context created for QDeclarativeView(0x1f5e16c0) 1
>
> Found SGX/MBX driver, enabling FullClearOnEveryFrame
>
> Found v1.4 driver, enabling brokenTexSubImage
>
> QGLWindowSurface: Using plain widget as window surface
> QGLWindowSurface(0x1f7d6a48)
>
> Found EGL_KHR_image_pixmap & GL_OES_EGL_image extensions (preferred
> method)!
>
> Found texture_from_pixmap EGL extension!
>
>
> Confused...
>
>
> /Harri
>
>
>
> On Thursday, November 03, 2011 01:06:32 PM Felipe Crochik wrote:
>
> > I have created a new webview qml element from scratch but on one of my
> many
>
> > (failed) attempts to find out why my application crashes on harmattan I
>
> > also tried copying the qdeclarativewebview.cpp and
> qdeclarativewebview_p.h
>
> > from the Qt sources and making a few modifications.
>
> >
>
> > It was surprisingly uneventful and it worked just fine (I just registered
>
> > on my c++ code the type and could swap between "implementations" by just
>
> > changing the import statement on my qml).
>
> >
>
> > Most likely you will have to modify the "private" parts of the
>
> > implementation so you won't be able to "just" extend the class and with
>
> > future qt releases you will have to manually merge your changes.
>
> >
>
> > Felipe
>
> >
>
> > On Thu, Nov 3, 2011 at 4:20 AM, Alexis Menard
>
> >
>
> > <alexis.menard at openbossa.org>wrote:
>
> > > Hi,
>
> > >
>
> > > On Thu, Nov 3, 2011 at 4:58 AM, Harri Pasanen <grego at mpaja.com> wrote:
>
> > > > I'm making my first steps in QML, looking at QML Web View element.
>
> > > >
>
> > > > If I'd like to get access to functionality under the hood to extend
>
> > > > what
>
> > >
>
> > > QML
>
> > >
>
> > > > Web View does, how would I go about it?
>
> > >
>
> > > You in fact can't.
>
> > >
>
> > > > For instance, I'd like to intercept linkClicked signal that QWebView
>
> > >
>
> > > sends,
>
> > >
>
> > > > but QML Web View does not expose.
>
> > >
>
> > > One way could be to extend QDeclarativeWebView but it's a private
>
> > > class (exported). QDeclarativeWebView is just a wrapper on top of
>
> > > QGraphicsWebView not QWebView.
>
> > >
>
> > > You can see if you prefer to subclass QGraphicsWebView and expose it in
>
> > > QML.
>
> > >
>
> > > The WebView element in QtWebKit 1.0 was not developed further as we
>
> > > move to WebKit2/Qt5 where in that world the QML api will be the
>
> > > primary entry point.
>
> > >
>
> > > > Is there a way to subclass in C++ what ever class QML uses underneath
>
> > > > to implement a better QML Web View element?
>
> > >
>
> > > See previous.
>
> > >
>
> > > > I'd appreciate any pointers to either documentation or source code.
>
> > > >
>
> > > > Or should at ask at qt-qml mailing list?
>
> > > >
>
> > > > Thanks,
>
> > > >
>
> > > > Harri
>
> > > >
>
> > > >
>
> > > > _______________________________________________
>
> > > > webkit-qt mailing list
>
> > > > webkit-qt at lists.webkit.org
>
> > > > http://lists.webkit.org/mailman/listinfo.cgi/webkit-qt
>
> > >
>
> > > --
>
> > > Alexis Menard (darktears)
>
> > > Software Engineer
>
> > > INdT Recife Brazil
>
> > > _______________________________________________
>
> > > webkit-qt mailing list
>
> > > webkit-qt at lists.webkit.org
>
> > > http://lists.webkit.org/mailman/listinfo.cgi/webkit-qt
>
>
>
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