Deleting object - detect event

[marmni]

Hi, I would like to `push out` new version of my PCB mod but two things still left:
1. Is there a possible to detect object on delete event - but from object side (not by adding Observer - but similar to removeSelection).

Code: Select all

a = doc.addObject("App::FeaturePython", 'Explode')
obj = explodeObject(a) 

Is there any function which I can add to class `explodeObject` (standard obj class) and detect delete event?

2.For other object i would like to delete one of available DisplayMode option without rewriting once again modes definitions. I tried to manage this option in viewProvider but without any result.

Code: Select all

layerS = FreeCAD.ActiveDocument.addObject("Part::FeaturePython", "layerName")
layerNew = layerSilkObject(layerS)

How do that?