code: @Pure
  	public double toCenterX(double x) {
  		final double adjustedX = this.invertX.get() ? -x : x;
  		return adjustedX + this.translationX.get();
  	}
docs: Change the coordinate system of {@code x} from the
  global document coordinate system to the "centered" graphical coordinate system.
  
  @param x the x document coordinate to convert.
  @return the x coordinate in the "centered" graphical coordinate system.