Qtouch lib on the ATXMEGA32A4U-MH
QTouch is a software touch solution, not hardware. It is dependent on basic MCU functionality in order to work.

According to the product page the ATxmega32A4U does have 16 touch channels and the datasheet does mention "QTouch ® library support" with "capacitive touch buttons, sliders and wheels", therefore that MCU does fully work with the QTouch library.