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wonder-skwonder-sk
committedJul 24, 2016
[FEATURE] Ability to cancel rendering of rasters + WMS/WCS support
The improvement allows immediate cancellation of raster rendering in progress. Until now, even when map rendering got cancelled (e.g. by zooming of panning canvas), the GUI got blocked while waiting for raster layers to finish their rendering (only vector layers have had support for cancellation). This should allow for much smoother user experience while browsing maps including rasters. The cancellation is supported currently by WMS/WMTS and WCS providers. GDAL provider may also get support thanks to improvements in GDAL 2. Funded by Land Information New Zealand.
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ltr-3_40final-3_0_0
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‎python/core/core.sip

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%Include qgsfeaturefilterprovider.sip
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%Include qgsfeatureiterator.sip
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%Include qgsfeaturerequest.sip
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%Include qgsfeedback.sip
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%Include qgsfield.sip
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%Include qgsgeometrysimplifier.sip
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%Include qgsgeometryvalidator.sip

‎python/core/qgsmaplayerrenderer.sip

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//! Do the rendering (based on data stored in the class)
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virtual bool render() = 0;
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//! Access to feedback object of the layer renderer (may be null)
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//! @note added in QGIS 3.0
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virtual QgsFeedback* feedback() const;
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//! Return list of errors (problems) that happened during the rendering
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QStringList errors() const;
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