EntryRenderer - adding ellipsis

I have a custom renderer that derives from EntryRenderer. I need to be able to display the text input with an ellipse at the end if it exceeds the size of the entry control.

I've tried setting "SetSingleLine(true)" and the Ellipsize to Android.Text.TextUtils.TruncateAt.End.

This is not working - when I move to the next entry field, the EntryRenderer field still display the entered text with no ellipse. I can also only see the end of the entered text where I was expecting to see the start of the entered text with the end replaced with an ellipse.

Any help/pointers much appreciated.