mobu-selectCallback.py

from pyfbsdk import *

def getSelectedObjects():
    '''Grab scene selection here and update UI/whatever'''
    pass

def OnConnectionStateNotify(control, event):
    '''Callback for all scene `ConnectionState` changes. Capture (un)select and process'''
    if not event.Action in (FBConnectionAction.kFBSelect, FBConnectionAction.kFBUnselect):
        return

    getSelectedObjects()

def Register():
    '''Register callbacks and future destruction'''
    
    FBSystem().OnConnectionStateNotify.Add(OnConnectionStateNotify)

    # Remove all callbacks on shutdown
    FBApplication().OnFileExit.Add(Unregister)
    # FBApplication().OnFileNew.Add(Unregister) # temp, for testing

def Unregister(control=None, event=None):
    '''Unregsiter callbacks'''
    
    FBSystem().OnConnectionStateNotify.Remove(OnConnectionStateNotify)
    FBApplication().OnFileExit.Remove(Unregister)

Register()