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  1. Qt
  2. QTBUG-66830

Rendering issue: flickering MapPolyline, when atleast 1 of coords is off the screen.

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Details

    • Bug
    • Resolution: Done
    • P3: Somewhat important
    • 5.11.0 Beta 4
    • 5.9.4, 5.10.1
    • None
    • Linux / Windows / Android / any

    Description

      MapPolylines flickers during pan gesutres, or during animations (CoordinateAnimation or NumberAnimation applied to map.center).

      Screencast: https://gfycat.com/ArtisticSnarlingCanvasback

      0) Create map, add MapPolyline with 2 coords, one of which is outside of screen viewport.
      1) Pan map, or set map center coord with animation/behaviour applied.
      2) Polyline will flick (i.e. there would be several frames, when scene is rendered without Polyline).

      Expected result: Polyline should be rendered in every frame (atleast it should not flick).

      Check minimal example:
      0) Grid is added to visualize map pan
      1) Behavior with CoordinateAnimation applied to map.center.
      2) Move1 and Move2 buttons change map center coord. Map is moved along the line to reduce eye strain.

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            paangele Paolo Angelelli
            basilsemuonov Basil Semuonov
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            Dates

              Created:
              Updated:
              Resolved:

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