[QGIS-Developer] Rotate or Offset Point symbol: how do they work? Or are they broken?

[Andreas Neumann]

Hi Harrissou, 

I would report it as a bug. I would also expect that an expression with
just the field in it would work. 

Andreas 

On 2018-10-23 12:58, DelazJ wrote:

> OK. Like usual, it's when you send the message that you get the answer by your own. :) 
> 
> The problem is an underlying issue where the expresssion "myfield" seems to not be the same as "myfield" field ie, instead of selecting the field from the data-defined "Field type" menu, I was mechanically opening the data-defined "Edit..." expression dialog and selecting the same field. The field values are applied to rotation but it's not recognized as a field the tool could update. 
> 
> Should I report a bug or is it intended/known limitation? 
> 
> Regards, 
> Harrissou 
> 
> Le mar. 23 oct. 2018 à 12:52, DelazJ <delazj at gmail.com> a écrit : 
> 
> Hi, 
> Thanks, Nyall. 
> 
> Le mar. 23 oct. 2018 à 03:06, Nyall Dawson <nyall.dawson at gmail.com> a écrit : On Tue, 23 Oct 2018 at 03:17, DelazJ <delazj at gmail.com> wrote:
>> 
>> Hi,
>> Any clue on how the "Rotate Point symbol" or "Offset Point symbol" digitizing tools are expected to work? The docs [0] seems wrong (or broken?) and whatever I try (including creating a field named "rotation"), I get a "The selected point does not have a rotation (or an offset) attribute set." message. And no help on how I could set this attribute...
> Works fine here. I just data define link it over to an appropriate
> field (numeric for rotation, string for offset), and then the tools
> work as described.
> 
> Exactly what I did for the rotate tool. The And doing it again changes nothing: 
> - I thought it had to do with temporary layer, hence switched to shp : fail 
> - swithed field type from integer to double: nothing 
> - I thought it was because i had not saved the file yet (something that would be related to auxiliary storage) then I saved the file: niente 
> - May be it's a matter of qgs vs qgz? Neither 
> 
> I always get that odd message about attribute not set. 
> I'm on Win 10 using master c94eefb6df. What could trigger that? 
> 
> Harrissou 
> The only thing I can think of is that the docs are a little unclear here:
> 
> "near the Rotation option of the highest level (preferably) of the
> symbol layers"
> 
> This should be set at the "marker" level, not at an individual layer
> level. (i.e. click the "Marker" entry in the list, not "simple marker"
> and set the rotation there).
> 
> Offset can be set at any layer and it will work.
> 
> Nyall
> 
>> 
>> [0] https://docs.qgis.org/testing/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html#rotate-point-symbols
>> 
>> Regards,
>> Harrissou
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