On Tue, Nov 20, 2012 at 6:16 PM, Etienne Tourigny <etourigny....@gmail.com>wrote: > > > Unfortunately the code that handles sublayer loading is in QgisApp, > and I would like to add some tests for this in case it gets broken in > the future. It broke a few months ago for rasters, and there ia a case > where it doesn't work for vectors. > > Would you have a suggestion as to how we can improve this - i.e. > manage sublayers outside of QgisApp? >
I think the sublayer handling should be done at the provider level. What is currently missing in QGIS is a notion of collection of layers. For example, OGR has "data sources" (usually a directory, server connection etc) which can be used for listing and accessing sublayers in a generic way - we need something like this also for QGIS provider implementations. Some providers already have some code going into this direction, but it's not exposed under a common API (e.g. QgsVectorDataSource class) - there is QgsPostgresConn or QgsSpatiaLiteConnection. The support for data sources would be also very handy for generic operations on layers (create, remove, rename). Regards Martin
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