Bug report #8873
"Delete Ring" - snap tolerance warning
|Affected QGIS version:||2.0.1||Regression?:||No|
|Operating System:||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||17553|
If I try and delete a ring (advanced digitising), but there is no ring where I click, I get a warning pop up:
"Snap tolerance: Could not snap segment. Have you set the tolerance in Settings > Snapping Options?"
I even get this if it is a single part polygon (and thus it's impossible to have a ring!). QGIS should check to see if there's an innerRing and give an appropriate error message.
better message display in map edit tools (fix #8873) emit signal from map tool, display message in qgisapp
#2 Updated by Jonathan Moules about 7 years ago
You are right that the tool works when there is a ring (or part).
However this bug report is dealing with the fail case.
I was under the impression that to create a ring required it to be a multi-part polygon. I might be wrong, but either way the application should be able to determine whether there is an interior ring and if not provide the proper error.
Only if there is an inner ring and the user misses it should this particular error appear. In all other circumstances it will mislead the user.
I also get the same error when I click a single part polygon and try to delete a "part".