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 <[email protected]
<mailto:[email protected]>>:
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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