[Qgis-psc] Grant QEP 181 report: Smarter Map Redraws + Tile Download Manager

[Anita Graser]

On 27.01.2021 06:29, Tim Sutton wrote:
> Thanks so much for these improvements Martin. Anita are you gathering
> these up for a blog post?

Yes, I'm collection them here: https://github.com/qgis/PSC/issues/43

Regards,

Anita



>
> Regards
>
> Tim
>
> On Thu, 21 Jan 2021, 15:31 Martin Dobias, <wonder.sk at gmail.com
> <mailto:wonder.sk at gmail.com>> wrote:
>
>     Hi all
>
>     (sorry for slightly late report)
>
>     I am happy to report that both planned under the hood improvements
>     have been implemented thanks to the grant:
>
>     1. Smarter Map Redraws (https://github.com/qgis/QGIS/pull/40960
>     <https://github.com/qgis/QGIS/pull/40960>)
>
>     This is helping to avoid the annoying flicker when map in the map
>     canvas is zoomed or moved. It is especially noticeable with
>     background maps. The work has reduced the problem especially for
>     raster layers. See the videos of comparison before/after:
>     https://twitter.com/lutraconsulting/status/1349638508877590530
>     <https://twitter.com/lutraconsulting/status/1349638508877590530>
>
>     2. Tile Download Manager (https://github.com/qgis/QGIS/pull/40998
>     <https://github.com/qgis/QGIS/pull/40998>)
>
>     This chunk of work is not going to be very visible to the users,
>     but it should make QGIS behave nicely with remote servers - until
>     now it would be common that QGIS would request raster/vector
>     tiles, then abort the requests while they were in progress when
>     map got moved/zoomed, only to start those requests again - this
>     should be avoided now.
>
>     Many thanks to QGIS.org!
>
>     Regards
>     Martin
>
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