[Qt-interest] Need somepractical advicehere... model/view framework

[Patric]

When should I use the ready QStandartItemModel and when is better to create 
my own model ?

----- Original Message ----- 
From: "Kaleb Pederson" <kaleb.pederson at gmail.com>
To: <qt-interest at trolltech.com>
Sent: Friday, July 03, 2009 1:22 AM
Subject: Re: [Qt-interest] Need somepractical advicehere... model/view 
framework


> On Thursday 02 July 2009 03:08:07 pm Sean Harmer wrote:
>> Patric wrote:
>> > Thank you guys,
>> > and why to use the QStandartItemModel instead of QStringListModel ? 
>> > Because
>> > I want to fill the rows with strings, a far as I know QStandatItemModel 
>> > is
>> > for more complex objects ?
>> >
>> You said yourself that your data is tabular in format, hence derive from
>> QAbstractTableModel seems logical to me. The underlying data structure
>> that you choose is up to you. I find it helpful to think of the model
>> classes as merely providing an interface that the views use to
>> communicate with your app about your data (and potentially modify it).
>
> I'm pretty much of the same opinion.  I've found that it works very well 
> to create a domain model of the system without any regard for what the 
> QAbstractItemModel needs.  Once I have a valid and well-functioning domain 
> model, it doesn't take very long to create an adapter between that and the 
> QAbstractItemModel (or appropriate subclass).
>
> This allows you to ignore all the model-view specifics when working on the 
> (domain) model and lends itself to a richer vocabulary.
>
> --Kaleb
>
>> The implementation can be hidden behind the model class interface in any
>> way you see fit and of course you are free to update your data
>> structures in other ways as long as you remember to inform the model
>> about the changes so that it can in turn let any other proxy models and
>> views know about the changes.
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