Re: Is this a good class hierarchy for my project

From:
Goran <goran.pusic@gmail.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Tue, 22 Mar 2011 12:58:32 -0700 (PDT)
Message-ID:
<8abe33f1-b677-4d22-b93a-210c4d65d9b0@i39g2000prd.googlegroups.com>
On Mar 22, 5:09 pm, "crea" <n...@invalid.com> wrote:

Goran wrote:

Ah, OK then. But still, it looks like containment is better.


...

OK, I think I see what you mean. It's your analysis that's "producing"
these? If so, that's the classic MVC operation: model changes, so
views need to update. In light of MFC, that means calling
UpdateAllViews with "DifferentMark" or whateverr explained by means of
lHint and pHint.


I think the current best version with container is then:

class WeatherData {}

class WeatherDocument : public CDocument
{
WeatherData m_Data;

}

Then we have the Analyze classes:

class Analyze
{
WeatherDocument m_doc;

}

Then from Analyze we can do UpdateAllViews:
m_doc.UpdateAllViews(...);

to draw at certain point in the middle of Analyzing. This would go to Cha=

rt

view. Would this work and is this what you also meant?


Document is handled by the framework, so it's going to be difficult
for Analyze to contain the document. A reference to a document, yes.
Analyze should only exist while analysis is running (it seems to be a
function, or a function object at best, with a set of intermediary
results). In a classic MVC, Analyze would come from the controller,
and it would modify the model (document), which would cause view
update. Or at least that's how I see things.

When is the analysis running? Is it long? Given it's weather data, I
am guessing yes. So that's going to be run in the background? If so,
you have other important considerations (how to transfer change
notifications from background to UI).

Goran.

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