ubuntu-phone team mailing list archive

[Zoltán Balogh <zoltan.balogh@xxxxxxxxxxxxx>]

I recommend to check out the source of the notepad-qml app and the 
example/demo apps from the UI Toolkit packages.

Prettiness is :) very subjective, but in my opinion the code of these 
apps are pretty.

Portability was definitely a very important argument when we decided to 
build the application development story of the Ubuntu Phone on Quick2. 
Also the UI Toolkit the API compatibility was and is a top priority: 
http://qt-project.org/wiki/QQUIComponentsComparison

One important aspect of portability is how easy is to deploy the 
application under development on a phone device or on any device. If you 
stick to QML than it is a copy and a "run" command, but if you have C++ 
than you need to cross-compile the code, make sure that you link against 
the right libraries, etc, etc ...

Zoltán


On 02/13/2013 05:59 PM, Nejc wrote:
> I have to agree with ajalkane on this. Doing business logic in C++ 
> also results in much prettier code. Data model management is also very 
> limited in QML. And it's not that I'm used to C++, I once tried doing 
> as much as possible in QML with non-satisfying results and I consider 
> myself experienced in QML.
>
> Another thing is, Ubuntu should aim at easy portability with other 
> QtQuick platforms. If only UI is written in QML, it's just easy UI 
> rewrite. Otherwise, you have to mess with your business logic code, 
> because it's integrated with UI.
>
> On 13. Feb 2013, at 16:46 , ajalkane <ajalkane@xxxxxxxxx 
> <mailto:ajalkane@xxxxxxxxx>> wrote:
>
> > My experience is that pure QML/JS solution is suitable to only quite 
> > simple applications. I have myself found the best practice to be to 
> > do the UI part in QML/JS, and have the "business logic" and models in 
> > C++. In fact, for portability between platforms I think doing as 
> > little as possible in QML is preferrable. Ie. it should contain only 
> > the UI code.
> >
> > Your mileage may vary, and I'm certainly looking forward how this 
> > approach works... but I do hope implementing a C++ backend is still 
> > possible and not something that's overly complicated or impossible. 
> > C++ plugins are perhaps more (coding) overhead in many cases than 
> > should be necessary.
> >
> >
> > On Wed, Feb 13, 2013 at 5:27 PM, Zoltán Balogh 
> > <zoltan.balogh@xxxxxxxxxxxxx <mailto:zoltan.balogh@xxxxxxxxxxxxx>> wrote:
> >
> >     Hello Frank,
> >
> >     Please bother the SDK team :) the best what you and any Ubuntu
> >     Phone application developer can do is to bother us with questions
> >     and suggestions.
> >
> >     Actually the QML/JS does not rule out the finely crafted C++
> >     plugins. Just the opposite!
> >
> >     We expect finely  crafted C++ plugins designed in a generic way
> >     so they could be reused by other applications and they could be
> >     contributed to the SDK. What we do not suggest is to use C++
> >     where pure QML offers a viable solution.
> >
> >     The shift from a procedura to a declarative programming mind is
> >     not necessarily trivial for a coder who have been doing C++ apps
> >     for years. That is why I would suggest to all Ubuntu Phone app
> >     developers to start with small and easy applications and discover
> >     the strength of the declarative programming.
> >
> >     Just translating a Qt/C++ code to QML/JS might not lead to the
> >     best results.
> >
> >     cheers,
> >
> >     Zoltán
> >
> >
> >
> >
> >
> >     On 02/13/2013 03:30 PM, Frank Mertens wrote:
> >
> >         -----BEGIN PGP SIGNED MESSAGE-----
> >         Hash: SHA1
> >
> >         Hi David,
> >
> >         thanks for the quick answer. I guess I'm trying to rewrite my
> >         C++ models in JS then.
> >         Let's see how much we can get out of QML/V8 when the first
> >         phone image is released.
> >         Thereafter we can then have a flame war on if we go purely
> >         QML/JS or have lots
> >         of finely crafted C++ plugins;) Until then don't bother the
> >         SDK team to much! I really appreciate
> >         the progress with the ubuntu-components -- gives me sleepless
> >         nights, when I think what I could
> >         do with these.
> >
> >         Greetings,
> >         Frank
> >
> >         - -- gplus.to/frankencode <http://gplus.to/frankencode>
> >         frankencode@freenode
> >         -----BEGIN PGP SIGNATURE-----
> >         Version: GnuPG v1.4.12 (GNU/Linux)
> >         Comment: Using GnuPG with undefined - http://www.enigmail.net/
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> >
> >
> >
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