Feature request #21759
Changing rendering behavior on zoom to prevent flashes
| Status: | Open | ||
|---|---|---|---|
| Priority: | High | ||
| Assignee: | - | ||
| Category: | Map Canvas | ||
| Pull Request or Patch supplied: | No | Resolution: | |
| Easy fix?: | No | Copied to github as #: | 29574 |
Description
On macOS with qgis 3.4.6 LTR. Unknown if this is on other systems
Zooming should disable rendering until the updated map view is completely rendered and then display. Currently with multiple raster and vector layers, with some wms layers, when a zoom event the canvas is cleared to white followed by various layers rendering and popping into view which causes eye strain and is visually distracting.
The behavior I want is closer to what happens when the render checkbox is deselected. The existing canvas should be in view until the new canvas has completely finished rendering and then it should replace the current canvas view on the screen. This behavior should probably be configurable
History
#1
Updated by Øystein Sture almost 5 years ago
Andrew Annex wrote:
On macOS with qgis 3.4.6 LTR. Unknown if this is on other systems
Zooming should disable rendering until the updated map view is completely rendered and then display. Currently with multiple raster and vector layers, with some wms layers, when a zoom event the canvas is cleared to white followed by various layers rendering and popping into view which causes eye strain and is visually distracting.
The behavior I want is closer to what happens when the render checkbox is deselected. The existing canvas should be in view until the new canvas has completely finished rendering and then it should replace the current canvas view on the screen. This behavior should probably be configurable
Increasing the time under "Rendering - Map update interval" will cause the renderer to block for a longer time before showing a partial canvas