Shooter – multitouch control

Kivy supports multitouch interactions. This feature has been there since the very beginning but we didn't pay attention to it until now. We did use the multitouch Kivy features with Scatter in the previous chapter, however, we didn't clarify that the whole screen and GUI components are already multitouch, and Kivy handles the events accordingly.

Note

Kivy handles multitouch actions internally. This means that all the Kivy widgets and components support multitouch behavior; we don't have to worry about them. Kivy solves all the possible conflicts of ambiguous situations that are common in multitouch control, for example, touch two buttons at the same time.

However, it is up to us to control particular implementations. Multitouch programming introduces logic problems that we need to solve as programmers rather than a new set of tools that you have to learn. Nevertheless, Kivy provides the data related to each particular touch so we can work on the logic. The main...