[QGIS-Developer] Grant report: Rework handling of multi-layer, mixed-format datasets

[Paolo Cavallini]

Thanks a lot Nyall, I'm sure you did more and better work than it was expected. Our donors can be happy.
Cheers.

Il 28 luglio 2021 07:02:30 EEST, Nyall Dawson <nyall.dawson at gmail.com> ha scritto:
>Hi lists,
>
>Just reporting in the conclusion of the grant work: "Rework handling
>of multi-layer, mixed-format datasets". You can read more about the
>motivation behind this work at
>https://github.com/qgis/QGIS-Enhancement-Proposals/issues/216
>
>While the work was partly motivated as an opportunity to clean up some
>older parts of the QGIS codebase which were fragile and had low test
>coverage, it has also resulted in many improvements and polish in the
>QGIS user interface. Specifically:
>
>- There's a much improved dialog shown when a user has to pick from
>multiple layers from a dataset dropped onto QGIS. The dialog will
>populate in a background thread, avoiding the UI hangs older QGIS
>versions experience when scanning for layers in large files. The
>dialog shows a unified view of all layers in the dataset, regardless
>of whether they are vector, raster or mesh layers. There's also a new
>"filter" widget allowing users to quickly find matching layers in
>larger datasets.
>
>- The browser view of files and file-based datasources has been
>reworked. You'll no longer see duplicate entries for the same files
>when these files can be read as either raster/vector/mesh layers (e.g.
>for netcdf files, geopdf files and other mixed-format types). A lot of
>consistency has been added to the right click actions you see when
>interacting with file based items, with many bugs fixed along the way.
>
>Under the hood, we've now got a flexible API for querying sublayers of
>a dataset which can be easily extended to new providers so that they
>automatically participate in the unified sublayers dialog and browser
>items. It's all protected by a huge number of new unit tests, the
>majority of which cover critical functionality which was previously
>not being tested.
>
>Thanks for funding this work!
>Nyall
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-- 
Sorry for being short
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