Adding new features to selection list using PyQGIS?

Question

The code written by Joseph answering to the question Features to stay selected by default in QGIS?

layer = qgis.utils.iface.activeLayer()
# Use active layer
def select(featureAdded):
 layer.setSelectedFeatures([featureAdded])
layer.featureAdded.connect(select)
# Connect "featureAdded" event to "select" function

works, but as soon as another feature is created, a new selection is made, resulting in only the new feature been selected.

I would like to create many features that stay selected, and that are added to the features already selected. I am not good enough with scripting to create a working code.

Answer 1

if you want add each new feature to selection , need add QgsVectorLayer.AddToSelection

Sample:

layer = iface.activeLayer()
def select(featureAdded):
 print(featureAdded)
 layer.selectByIds([featureAdded],QgsVectorLayer.AddToSelection)
layer.featureAdded.connect(select)

tested in QGIS 3.4

Answer 2

Inside the select() function, you just need to replace :

layer.setSelectedFeatures([featureAdded])

with:

layer.select(featureAdded)

---

So the code would look like:

layer = iface.activeLayer()
def select(featureAdded):
 layer.select(featureAdded)
layer.featureAdded.connect(select)