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[cellml-dev] SVG, JavaScript and OpenCell


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  • From: r.britten at auckland.ac.nz (Randall Britten)
  • Subject: [cellml-dev] SVG, JavaScript and OpenCell
  • Date: Thu, 1 Apr 2010 09:51:31 +1300
Bit of double entry, so I'll post all this on
https://tracker.physiomeproject.org/show_bug.cgi?id=1763


> -----Original Message-----
> From: cellml-tools-developers-bounces at cellml.org [mailto:cellml-tools-
> developers-bounces at cellml.org] On Behalf Of Adam Reeve
> Sent: Thursday, 1 April 2010 9:40 a.m.
> To: A list for the developers of CellML tools
> Subject: Re: [cellml-dev] SVG, JavaScript and OpenCell
>
> Hi Randall
>
> I don't know that Qt/C++ should be discounted so quickly. I've had a
> quick search for using SVG + Javascript with Qt and it seems like
> there's good support for it.
>
> An example of KDE's use of SVG:
> http://www.svgopen.org/2008/papers/104-SVG_in_KDE/
>
> Looking at the QtWebkit documentation it also looks like there's good
> support for SVG: http://qt.nokia.com/doc/4.6/webintegration.html
>
> I'm not that familiar with how OpenCell uses Javascript but this
> sounds like the kind of thing that's needed:
>
> "QtWebKit provides facilities for rendering of HyperText Markup
> Language (HTML), Extensible HyperText Markup Language (XHTML) and
> Scalable Vector Graphics (SVG) documents, styled using Cascading Style
> Sheets (CSS) and scripted with JavaScript.
> A bridge between the JavaScript execution environment and the Qt
> object model makes it possible for custom QObjects to be scripted."
>
> This seems like a way we could connect Javascript from an SVG to
> objects in the Qt application:
>
> void QWebFrame::addToJavaScriptWindowObject ( const QString & name,
> QObject * object )
> Make object available under name from within the frame's JavaScript
> context. The object will be inserted as a child of the frame's window
> object.
> Qt properties will be exposed as JavaScript properties and slots as
> JavaScript methods.
> If you want to ensure that your QObjects remain accessible after
> loading a new URL, you should add them in a slot connected to the
> javaScriptWindowObjectCleared() signal.
> If Javascript is not enabled for this page, then this method does nothing.
> The object will never be explicitly deleted by QtWebKit.
>
> There's an example of its use here: http://www.kdedevelopers.org/node/4008
>
> Thanks,
> Adam
>
> On 1 April 2010 08:56, David Nickerson <david.nickerson at gmail.com> wrote:
> > one question, why do you want to stick to SVG with embedded JavaScript?
> >
> > On Thu, Apr 1, 2010 at 8:51 AM, Randall Britten
> > <r.britten at auckland.ac.nz> wrote:
> >> Hi
> >>
> >>
> >>
> >> OpenCell is currently based on XulRunner (i.e. very similar to
Firefox),
> and
> >> hence cruises regarding handling SVG with JavaScript.? Based on early
> >> reports from Alan and Andrew, it seems that other platforms (e.g.
Qt/C++
> or
> >> Scala/JVM) will probably struggle.
> >>
> >>
> >>
> >> However, one option to consider is to reverse the situation, and rather
> than
> >> embed the browser in OpenCell, embed OpenCell in the browser.? That
way,
> the
> >> SVG is rendered by the browser, and the JavaScript is making calls to
and
> >> API exposed by the OpenCell plug-in (or applet?).
> >>
> >>
> >>
> >> Thoughts?
> >>
> >>
> >>
> >> Regards,
> >>
> >> Randall
> >>
> >> _______________________________________________
> >> cellml-tools-developers mailing list
> >> cellml-tools-developers at cellml.org
> >> http://www.cellml.org/mailman/listinfo/cellml-tools-developers
> >>
> >>
> > _______________________________________________
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> > http://www.cellml.org/mailman/listinfo/cellml-tools-developers
> >
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