topological editing broken(?)

[qgib]

Author Name: Giovanni Manghi (@gioman)
Original Redmine Issue: 12441
Affected QGIS version: 2.8.1
Redmine category:digitising

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Please have a look at the attached screencast.

The very same project (so same data, same snapping options, etc.) is open under both Linux (Ubuntu 14.04) and Windows using QGIS 2.8.1 in both cases.

As you can see topological editing under Linux does not works, while under Windows is ok.

Under Linux is not always broken, sometimes it works others don't, is anyway pretty easy to replicate.

I also attach the sample project/data.

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• bug_topological_editing.mp4 (Giovanni Manghi)
• bug_topological_editing_take2.mp4 (Giovanni Manghi)
• teste_snapping.zip (Giovanni Manghi)
• vert15_right.png (Giovanni Manghi)
• vert45_left.png (Giovanni Manghi)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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very odd, see also the second attached screencast: if before moving the node that does not respect the topological editing I move another one that works ok, then moving again the first one is ok... Sometimes it also seems that (working or not) depends just on the scale... Honestly I'm baffled by this bug, hope someone can sort it out.

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• 8539 was configured as bug_topological_editing_take2.mp4

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• bug_topological_editing_take2.mp4 (Giovanni Manghi)

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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• subject was changed from topological editing broke under Linux to topological editing broken under Linux

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• 8538 removed teste_snapping.zip

[qgib]

Author Name: Giovanni Manghi (@gioman)

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it seems to depend on what vertex is dragged. If is dragged the one of the right polygon than all ok, if the one of the left polygon then not ok... but again this happen only on linux, not windows.

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• 8543 was configured as vert15_right.png
• 8544 was configured as vert45_left.png
• 8542 was configured as teste_snapping.zip

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• vert15_right.png (Giovanni Manghi)
• vert45_left.png (Giovanni Manghi)
• teste_snapping.zip (Giovanni Manghi)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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apparently there is anyway something very wrong also under Windows, this has just been sent to me by a user

https://www.dropbox.com/s/wm6mop1ydudx8uj/capture_Wed_Mar_25_15.30.53.mkv?dl=0

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• subject was changed from topological editing broken under Linux to topological editing broken(?)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• fixed_version_id was changed from Version 2.8.2 to Version 2.10

[qgib]

Author Name: Giovanni Manghi (@gioman)

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I cannot replicate it anymore on the latest master.

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• status_id was changed from Open to Closed
• resolution was changed from to not reproducable