Hello, I’m trying to get the currently selected rhino object from the Rhino document in real-time. If I use this script with a trigger attached to the component it works fine of course: import Rhino import rhinoscriptsyntax as rs sel_objs = [] def get_selected_objs(): for obj in Rhino.Rhino…

event_handler_c.gh (13.9 KB) Check this.

I used it for a while but yesterday I went back to referencing an input object with python. I’m doing a lot of control point editing on meshes and need the updated mesh in Grasshopper but the select / deselect event handler does seem to detect sub object selections.

Works perfectly thank you! I’m also interested in sub-object selection and control-point manipulation so thank you for sharing the script and for sharing that information. I really appreciate it!

Hi @martinsiegrist , I added this line: if (!guids.Contains(rhObj.Id)) above: guids.Add(rhObj.Id); Because while the guids were clearing on deselecting, anytime i moved an object in rhino it append a duplicate guid to the guids list (A out) Does that happen on your end? Full Code: // Grassho…

It took a moment but after selecting multiple objects I see what you mean. Great improvement.

[image] Michael Vollrath: However, I’m trying to use event handlers so that anytime a selection change occurs, i get the most current selected object in real time. On the GHPython SDK mode side of things, one can reliably (in my experience at least) subscribe and unsubscribe to events using t…

Awesome, thanks @AndersDeleuran !

I happen to need this type of feature for a user interaction experiment that I’m trying to develop, and your code has helped me understand in a level, how to trigger a grasshopper component through events. What I need to know is why does it sometimes trigger more than two times once you select and o…

Nice script. It is possible to change this script to reference GUIDs instead of Geometry?

[image] Cumberland: It is possible to change this script to reference GUIDs instead of Geometry? Do you mean something like this: [2024-02-07 10_25_56-Grasshopper - 230929_GetSelectedRhinoGeometry_00(1)_] 240207_GetSelectedRhinoGeometry_00.gh (4.5 KB)

Yes, it is working great. Thank you.

Python - Get Selected On Selection Change Event Handler

Grasshopper Developer

AndersDeleuran February 7, 2024, 9:27am 14

Do you mean something like this:

240207_GetSelectedRhinoGeometry_00.gh (4.5 KB)

Get object GUID in grasshopper Python component

Grasshopper GUID input

Topic		Replies	Views
Listen for Rhino object selection and run a Grasshopper Script Grasshopper windows , python , csharp , rhino7	2	217	August 9, 2024
Grasshopper helper Grasshopper windows	5	315	July 17, 2024
Input selected object in Rhino to Grasshopper? Grasshopper windows , heteroptera , sasquatch	5	299	March 27, 2025
Selection update to grasshopper Grasshopper windows	9	294	September 18, 2024
Noob question #005: retrieving guids from objectsSelected event Scripting	3	666	March 25, 2019

Python - Get Selected On Selection Change Event Handler

Related topics