[Kde-pim] Using an EntityMimeTypeFilterModel to show Items only

[Dan Vratil]

On Saturday 25 of August 2012 23:51:21 Marcus Harrison wrote:
> Hello everyone,

Hi,

> I've started writing an E-mail client using Akonadi and I'm having trouble.
> I'm trying to configure a model that only contains E-mail items, not
> collections.
> To do this, I'm trying to use an EntityMimeTypeFilterModel on top of an
> EntityTreeModel, but it's behaving very oddly.
> 
> If I don't configure it at all, the documentation says it should have all
> mimetypes in the include filters, but in practice it's only showing
> Collections. It should show Items as well, shouldn't it?
> 
> Anyway, adding an inclusion filter of "message/rfc822" filters the
> Collections out, but because it's not including any Items anyway it then
> just displays nothing.
> 
> Can anyone explain just what's going on, please?

I remember fighting this problem for quite a while when I was writing an RSS 
reader.

Check 
http://gitorious.org/kgooglereader/kgooglereader/blobs/master/part/readerview.cpp#line245

maybe it will help :) The usecase is slightly different then what you describe 
here, but the main idea is the same.

> 
> A paste of my test code so far:
> 
> 
> MainWindow::MainWindow()
> {
>     foldersDock = new FoldersDock(this); // Some other configured widget
> 
>     changeRecorder = new Akonadi::ChangeRecorder(this);
>     changeRecorder->setCollectionMonitored(Akonadi::Collection::root());

Specifically, adding

changeRecorder->setMimeTypeMonitored("message/rfc822");

might solve your problem.

> 
>     model = new Akonadi::EntityTreeModel(changeRecorder, this);
>     mailsModel = new Akonadi::EntityMimeTypeFilterModel(this);
>     mailsModel->setSourceModel(model);
>     mailsModel->addMimeTypeInclusionFilter("message/rfc822");
> 
>     mailsView = new Akonadi::EntityTreeView(this, this);
>     mailsView->setModel(mailsModel);
> 
>     connect(foldersDock, SIGNAL(currentChanged(Akonadi::Collection)),
>             this, SLOT(currentChanged(Akonadi::Collection)));
> 
>     addDockWidget(Qt::LeftDockWidgetArea, foldersDock);
>     setCentralWidget(mailsView);
>     setupGUI();
> }
> 

Hope it helps,

Cheers,

Dan

> 
> Marcus Harrison

-- 
Dan Vratil
www.progdan.cz | dan at progdan.cz | Jabber: progdan at jabber.cz
Fingerprint: 76C9 2F08 5D0D 6F9E 5AD4 2BFD 3A85 0307 F506 5B61
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