QComboBox autocomplete automatically changes edittext

Create a QComboBox. Fill it with a couple of strings, say 'One', 'Two', 'Three'.

When the program is running enter one of those strings, but differ the case, into the combo. Change the focus to anything else, by clicking on another window or something.

THE TEXT WILL BE AUTOMATICALLY CHANGED TO THE FIRST MATCHING ITEM IN THE COMBO BOX!

For instance, if 'ONE' was entered it'll be changed to 'One'.