Noob question #005: retrieving guids from objectsSelected event

Can Rhino.Geometry *EventArgs class be overloaded with additional methods/properties, or I have to create my own class and OnSomething event, plus event handler?

This question is motivated by the fact that OnObjectSelected event does not have a property to give object’s guid.

hello @ivelin.peychev,

WIth OnObjectSelected you mean the selectObjects event: ?

If so, this event has a RhinoObjects property (

And from a RhinoObject you can get the guid.
Or are you using a different event?

Here is a working code sample you can study, have fun:

import Rhino
import scriptcontext as sc
import pprint

class selectionEventHandler:
    # Initializer
    def __init__(self):
        # Enable the event handlers
        Rhino.RhinoDoc.SelectObjects += self.OnSelectedEvent
        Rhino.RhinoDoc.CloseDocument += self.OnCloseDocumentEvent
    # Disables the eventhandlers
    def Disable(self):
        Rhino.RhinoDoc.SelectObjects -= self.OnSelectedEvent
    # Selection eventhandler
    def OnSelectedEvent(self, sender, e):
        print "Following guids have been selected:"
        pprint.pprint([obj.Id for obj in e.RhinoObjects])
    # close document eventhandler to purge the sticky keys
    def OnCloseDocumentEvent(self, sender, e):

# Enablde / Disable function function
def enableDisableSelectionEventHandler():
    # check if there is already an eventhandler called selectionEventHandler
    if sc.sticky.has_key("selectionEventHandler"):
        # Delete the old handler
        handler = sc.sticky.pop("selectionEventHandler", None)
        if handler:
            handler = None
            print("selectionEventHandler disabled")
        # Create the handler
        handler = selectionEventHandler()
        # Add the handler to the sticky dictionary so it
        # survives when the main function ends.
        sc.sticky["selectionEventHandler"] = handler
        print("selectionEventHandler enabled")
if __name__ == "__main__":
1 Like

Ah, I see, so it’s a list of objects and to get the Guid I need to *.Id it. I assume all objects that are selected.

Thanks a lot @lando.schumpich.