[QGIS-Developer] Preview job and slow datasources

[Tim Sutton]

Hi

> On 16 Nov 2017, at 04:35, Patrick Dunford <enzedrailmaps at gmail.com> wrote:
> 
> What is this "preview job" function?
> 
> 

Its application logic to prefetch / pre-render offscreen content in anticipation of user panning the map.

Regards

Tim
> 
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—







Tim Sutton

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