ubuntu-phone team mailing list archive

[Nejc <puschkin@xxxxxxxxx>]

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> 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> 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:
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> 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
> frankencode@freenode
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> 
> 
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