Method scroll

src/main/java/com/volmit/adapt/util/UIWindow.java:262–268

(int direction)

    }

    @Override
    public UIWindow scroll(int direction) {
        viewportPosition = (int) clip(viewportPosition + direction, 0, getMaxViewportPosition()).doubleValue();
        updateInventory();

        return this;
    }

    @Override
    public int getViewportHeight() {