TextArea and ScrollView problem.

If I put a TextArea (without Word Wrap) inside a ScrollView and type a text that goes out of bounds, the ScrollView does not follow the caret (see below).


(The "W" key is still pressed, but the horizontal scroll bar does not follow)

Is there a Unity-way to do that or I have to write my own code?

P.S. The UI entirely done in NGUI, but its input is not good enough. That's the reason I'm using Unity's GUI here.