[Qgis-developer] 1:many relation enhancements

[matteo]

Hi all,
I'm working with the 1:many relation tool (what an amazing tool!!) and I 
get (maybe) some enhancement ideas.


I'll explain myself with a small example:

I have a geometry layer (Europe countries extracted from natural earth 
database) and a table (dbf file downloaded from the EU database[0]) of 
waste produced for every country from 1995 to 2012.

I made a form mask for the identify feature tool and when I open the 
relation tab I can see relation of the table of all the waste produced 
for every year.
But what if I want to see just the year 2010 for example? Or what if I 
have 2 waste types in the same column (say urban waste and recycled) and 
I want to see just the recycled one?

Do you think it is possible/easy/smart to add a sort of auto-filter tool 
(like in Calc) so that the user can filter, and then display, just by 
the values he wants?

Moreover (and finally), do you think that it would be possible also to 
render by the linked table values? I mean, graduate all the countries of 
the Europe layer with the recycled waste values coming from the dbf file?

I don't know if I have been clear enough, but I hope so else, be free to 
ask clarifications

PS. here [1] a dropbox link with a zip file containing the layers and 
the project file.. if anyone wants to try..

Thanks! Cheers

Matteo

[0]http://appsso.eurostat.ec.europa.eu/nui/submitViewTableAction.do
[1]https://www.dropbox.com/s/7j9e7sq3gcphkcz/project.zip?dl=0