On Thursday 17 February 2011 16:32:45 Christian Mollekopf wrote: > Hey Laura, > > On Thursday 17 February 2011 14:10:58 Laura Dragan wrote: > > Hi Chris, > > > > On Thursday 17 February 2011 01:14:02 Christian Mollekopf wrote: > > > hi, > > > > > > Does anybody know how I can detect when a new Tag was added/removed > > > to/from Nepomuk? I.e. to update a Tag Cloud. > > > > do you need to update the tag cloud if any resource is tagged outside your > > app, or just inside your app? > > > I'd like to update it whenever new tags are available, not only from within > my > app. > > > In SemNotes for instance the tag cloud is built only with the tags used on > > the notes - you can find that code on gitorious. > > > > A long time ago I wrote a plasmoid that built the tagcloud for the entire > > desktop (not sure if it's in playground or not), and that one was > > listening to statementsAdded and statementsRemoved from the model, but I > > took the easy path and rebuilt the cloud every time instead of just > > updating it. It worked ok with up to 30 tags, without visible delays from > > all the repository querying. > > > > > Currently I listen to the statementAdded/statementRemoved signals of the > > > Soprano::Model, and I can also detect if an Item gets a new Tag, but I > > > don't know how I can see from the Statement when a new Tag was created > > > or a Tag was deleted. > > > > I think you can use the signals > > > > void statementAdded( const Soprano::Statement &statement) > > void statementRemoved( const Soprano::Statement &statement) > > > > to look into the statements that are affected with the functions: > > subject(), predicate() and object(). > > > Thats what I'm trying to do, but I don't get what indicates that a tag is new > to the Nepomuk system (or that a tag was removed).
I'd do that by checking if the statement added or removed has the predicate "rdf:type" and the object "nao:Tag". The subject of the statement is then the uri of the tag that was created or deleted. Laura > > Thanks for your help, > > Chris > > > > Hope this helps > > Laura > > > > > Cheers, > > > > > > Chris > > > _______________________________________________ > > > Nepomuk mailing list > > > [email protected] > > > https://mail.kde.org/mailman/listinfo/nepomuk > > > > _______________________________________________ > > Nepomuk mailing list > > [email protected] > > https://mail.kde.org/mailman/listinfo/nepomuk > _______________________________________________ > Nepomuk mailing list > [email protected] > https://mail.kde.org/mailman/listinfo/nepomuk > _______________________________________________ Nepomuk mailing list [email protected] https://mail.kde.org/mailman/listinfo/nepomuk
