What is the most common control method in Underfloor heating?

The typical appraoch I see in heating systems is to have a three way valve on the suction side of the heating pump. This mixes cool return into the flow into the heater. The controling varialbe is the flow temeprature, the controlled varaiable the setting of the valve.

Example:

You then adjust the target flow temperature based on the room temperature you want. Check if such a system works with your heating in terms of hydraulics, I assume a normal heating manifold with hydraulic compensator.

However this is from large heating systems and may be overblown for a domestic purpose.