public void setScrollPosition(float focusX, float focusY) {
        setZoom(normalizedScale, focusX, focusY);
    }
Set the focus point of the zoomed image. The focus points are denoted as a fraction from the
left and top of the view. The focus points can range in value between 0 and 1.

@param focusX
@param focusY
app/src/main/java/com/rozdoum/socialcomponents/views/TouchImageView.java