Bug report #17754

[Node tool] Misleading message when deleting all nodes of a ring or a part

Added by Harrissou Santanna almost 3 years ago. Updated over 1 year ago.

Affected QGIS version:master Regression?:No
Operating System: Easy fix?:No
Pull Request or Patch supplied:No Resolution:
Crashes QGIS or corrupts data:No Copied to github as #:25650


Select a polygon feature with a ring
Use the node tool to select the ring vertices and delete them
You get in the messagebar: "Geometry has been cleared. Use the add part tool to set geometry for this feature." which is a wrong message given that there's still a geometry attached to the feature. This also occurs when a part of a multi-part geometry is deleted with node tool.
Note that using the dedicated "delete ring" or "delete part" tools do not trigger this message.

This message should be shown only when there's no more geometry attached to the feature.

Only master is concerned given that it looks impossible to remove all the vertices of a ring or a part (unless it's a single part feature) in 2.18


#1 Updated by Martin Dobias almost 2 years ago

This one is a bit weird :-) I can see a bug in the code, but fixing that bug will essentially disable the possibility to remove rings in vertex tool. There are some more bugs inside, so e.g. if I have a polygon with three holes, and select vertices of one hole and delete them, it will actually delete two holes. Vertex deletion is simply not very well handled by the core geometry classes and would need a bit of a rework...

#2 Updated by Giovanni Manghi over 1 year ago

  • Status changed from Open to Feedback

Please check if this issue is still valid on QGIS 3.4.5 or 3.6.

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