[Qgis-user] Editing only the selected feature

[Christian Röttger]

Ok, thanks. I will keep this in mind when developping starts.

2015-11-16 13:20 GMT+01:00 Bernhard Ströbl <bernhard.stroebl at jena.de>:

> Hi Christian,
>
> a layer is either editable or not editable (reason for splitting up the
> datasource in two layers in my second workaround).
> For a plugin you could connected some of QgsVectorLayer's signals [1] to
> slots that undo changes depending on the selection status of the feature.
> However you somehow must store the geometries of the unselected features as
> the signals only contain the new geometry/geometries but not the old one/s
> before the change (would be worth to enhance this behaviour IMHO).
>
> Bernhard
>
> [1] http://qgis.org/api/classQgsVectorLayer.html
>
> Am 16.11.2015 um 12:11 schrieb Christian Röttger:
>
>> Hi Bernhard,
>>
>> thanks for your answer. That are the solutions we also thought about.
>> Further we want to implement an own plugin where we can handle this in a
>> better way.
>>
>> It was possible that there was some build in function already, which i
>> didn't find. Is there someone here, who already developed a plugin which
>> only edits selected features? Maybe this is possible with direct api
>> acces or is always the complete layer editable?
>>
>> cheers
>> Christian
>>
>>
>> 2015-11-16 11:33 GMT+01:00 Bernhard Ströbl <bernhard.stroebl at jena.de
>> <mailto:bernhard.stroebl at jena.de>>:
>>
>>     Hi Christian,
>>
>>     marking features as editing finished can IMHO only be realized in
>>     the feature's attributes. Insert a boolean field "editing_finished"
>>     in the layer's attributes. With this I see two workarounds:
>>     1) if you are on a database layer: Have a trigger that prevents the
>>     geometry from being changed if editing_finished = true
>>     2) Should work on all data sources: Load the layer twice: Once with
>>     filter editing_finished = false (this is the layer you work in) and
>>     once with editing_finished = true. If you have finished editing a
>>     feature set its editing_finished attribute to true and save edits.
>>     The feature will be "moved" from the edit layer to the
>>     editing_finished layer
>>
>>     Bernhard
>>
>>     Am 16.11.2015 um 11:06 schrieb Christian Röttger:
>>
>>         Hi,
>>
>>         at the moment i try to convince my boss to change to qgis for a
>>         greater
>>         digitizing project.
>>         One question is, if it is possible to edit only one (maybe more)
>>         selected feature?
>>         As an example: I edit a polygon. When his is complete it
>>         shouldn't be
>>         touched anymore. Then i edit the neighbour polygon, maybe with
>>         "advanced
>>         editig" -> "Reshape Features" and digitize (unintentionally) over
>> a
>>         corner or boarder of the first polygon. So both features are
>>         changed.
>>
>>         Summarized, is it possible to edit only one selected feature or
>> does
>>         anyone know a workaround?
>>
>>         Thanks and cheers
>>         Christian
>>
>>
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