docs: public int getIsTouchingAmOrPm(float xCoord, float yCoord) {
          if (!mDrawValuesReady) {
              return -1;
          }
  
          int squaredYDistance = (int) ((yCoord - mAmPmYCenter)*(yCoord - mAmPmYCenter));
  
          int distanceToAmCenter =
                  (int) Math.sqrt((xCoord - mAmXCenter)*(xCoord - mAmXCenter) + squaredYDistance);
          if (distanceToAmCenter <= mAmPmCircleRadius && !mAmDisabled) {
              return AM;
          }
  
          int distanceToPmCenter =
                  (int) Math.sqrt((xCoord - mPmXCenter)*(xCoord - mPmXCenter) + squaredYDistance);
          if (distanceToPmCenter <= mAmPmCircleRadius && !mPmDisabled) {
              return PM;
          }
  
          // Neither was close enough.
          return -1;
      }