[Qgis-developer] URI

[Giuseppe Sucameli]

Hi Radim,

On Wed, May 25, 2011 at 9:37 AM, Radim Blazek <radim.blazek at gmail.com>wrote:

> I would like to discuss possible change of providers URI format.
> ...
> Some possible solutions:
> 1) minimal:
>  - add WMS additional params somehow to URI + parsing in WMS provider
> (it is not clear to me why it was not done this way when WMS was
> implemented)
>
I would avoid the 1) as it would be valid for now, but I'm pretty sure in
future
development we could need a more flexible solution.

2) maximal A:
>  - use QUrl for all providers with providers key as scheme
> 3) maximal B:
>  - use modified QgsDataSourceURI (it is not generic, works with set
> of known params only) for all params including provider key
>
I'd prefer the 2), it's generic and we can pass parameters using the query
string.
The 3) would be also good.
An alternative would be use QgsDataSourceURI like a container for QUri, in
this manner we can define our interface to access the uri informations.

Other issues:
>  - should it be possible to pass via URI also layer style hints?
>
I don't know, probably yes.


>  - how the QGIS should recognize layer type of a dropped URI? Should
> it be a param in URI or the QGIS should recognize that from a provider
> key (asking provider)?
>
IMHO no, it should be the provider which takes care of this.

Cheers.

-- 
Giuseppe Sucameli
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