Active/Contour activity browsing

[Sebastian Trüg]

On 05/09/2011 11:28 PM, Marco Martin wrote:
> Hi all,
> let's see what happened recently in the usage of Nepomuk by Plasma Active, 
> also building blocks for one of the main user interface pieces for Contour.
> (long message but has pictures ;)
> 
> a central point is using Activities to organize all our resources, being 
> files, contacts or applications, in brief what will be represented by Nepomuk 
> resources.
> 
> a central piece for wiring up Plasma and Nepomuk is the metadata DataEngine.
> here is possible to do arbitrary queries to Nepomuk.
> 
> Today i did a little marathon to rework its api, to permit more easily to use 
> more than one applet connected to the dataengine and track of the queries that 
> can auto update over time.
> 
> Now each query is a separate dataengine source and a custom DataContainer for 
> each source.
> this means a separate QueryServiceClient per query, that can keep track of any 
> change.
> 
> there is now a new source type, called CurrentActivityResources: (followed by 
> the activity id)
> this lists all the resources associated with the given activity, and this will 
> be used in a view used by default in the center on the Contour activity view.
> a service is present too to make possible to add/remove associations between 
> activity and resources.
> 
> a user interface has been done as well, and here it is how it looks right now:
> http://i.imgur.com/GpmUM.png
> this is a qml only containment, and uses the common resource delegates 
> developed before/during Tokamak. (for different resource types they will 
> eventually look in a different way)
> 
> it's still rough, (for instance resource types still have the internal user 
> unfriendly name, like PaginatedTextDocument) but at this point, modulo some 
> bugs i will talk about later, just needs refinements.

Just a hint here: these still user-unfriendly names need to be fixed in
shared-desktop-ontologies. I would very much like some help here. Not
only are there many types to name properly, it is also not easy to
decide on good names.

Cheers,
Sebastian

> what is possible to do with those icons?
> a single click opens it, a press and hold opens a menu:
> http://i.imgur.com/L8NBx.png
> 
> the entries present are just a proof of concept for demo purposes, they just 
> show a brief feedback message (they will eventually use the actions provided 
> by the share/like/connect service)
> 
> one entry that does work is the last: "add to the current activity".
> tapping on it it will add that resource to the default view (when no query is 
> present)
> 
> this entry, in the default view becomes instead "remove from current activity"
> 
> It does actually work, however there are still some bugs.
> it seems that when a resource is  removed, QueryServiceClient sends 
> entriesRemoved() for all of the associated resources, and is necessary to 
> reset the query and do it again to get the correct results.
> Sebastian, any ideas?
> 
> To conclude, a question about the api:
> right now the add/remove association is done by a service with those two 
> possible operations:
> it requires to pass both the nepomuk url of the resources and of the activity 
> (means that would even be possible to associate a resource with an activity 
> different from the current one, if there will be a ui for it)
> 
> a different implementation would be to use kactivityconsumer to figure out the 
> current activity and just let add/remove associations to the current *running* 
> activity.
> 
> Cheers,
> Marco Martin
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