Multi-touch gear for navigation

Processing for Android
7

@Alhugen
As for the second questiont; try code below.
It is a tricky solution because mouseDragged() is far less fluent then I expected; so I had to build-in a small timer. Put the code right below background()

fill(0);
  if (mouse_drag) delta_degree = int(first_degree-degree);
  if (!mouse_drag) lock = false;
  mouse_drag = false;
  text("delta_degree = "+delta_degree, 150, 200);
  text("degree = "+int(degree), 150, 100);

And,


void mouseDragged() {
  if (!lock && millis()-start_time > 150) {
    first_degree = degree;   
    lock = true;
  }
  mouse_drag = true;
  start_time = millis();
}
/*
And of course declare variables
boolean mouse_drag, lock;
float start_time, first_degree;
int delta_degree;
*/

I have ideas about solving the other problems, but first I have to know if this is working for you.