Checking all items in MultiCheckComboBox is very slow ?

[GiannisIordanou]

I am writing a GUI application using PyQt and I have a multicheckbox widget using the code from MultiCheckComboBox.py.

When I try to select all items (800 in total) using checkAll(True) it takes a while before everything is selected.

Is this typical behaviour ? Is there a better way to select all items ?

Thanks.