(Blender Bug?) Chaning Property In Redo Panel Deselects Geometry

Other Development Topics Python API
#1

This issue has been driving me nuts and if not fixed, makes all my selection add-ons useless.

I’ve done a TON of testing and found when it occurs.

This is how it works:

When you select any geometry with any select operator(bpy or bmesh) and the code is executed by a custom operator, the redo panel will deselect the geometry selected by the script and only leave one unselected.

with%20operator%20se
with%20operator%20se1024×643 1.08 MB

As you can see the operator is super bare bones, no junk code, yet the issue still occurs.

To confirm that this is a fault with a custom operator, I selected the edges with the same code, just without the operator. And I didn’t run into any issues.

The demo speaks for it self:

without%20operator%20se
without%20operator%20se1024×643 1.29 MB
!

I have no idea how this not already a big issue. I haven’t seen anybody complain about this. But with this behaviour it tells me that it’s a bug. I wish do death that I could fix it, but it seems I can’t.

If anybody has any idea what’s going on, please share it!

Here’s the code for testing:

import bpy
import bmesh

from bpy.types import Operator

class OT_SELECT_WITH_OPERATOR(Operator):
    bl_idname= "view3d.select_with_operator"
    bl_label = "Select With Operator"

    def execute(self, context):

        print('run')
        obj = bpy.context.edit_object
        me = obj.data
        bm = bmesh.from_edit_mesh(me)

        for e in bm.edges:
            e.select = True

        bmesh.update_edit_mesh(me, True)

        return{'FINISHED'}

def register():
    bpy.utils.register_class(OT_SELECT_WITH_OPERATOR)  

def unregister():
    bpy.utils.unregister_class(OT_SELECT_WITH_OPERATOR)    
   
if __name__ == "__main__":
    register()
#2

Nevermind, just needed to add:

bl_options = {‘REGISTER’, ‘UNDO’}

under my operator variables