public ImmutablePair<T, T> getRange() {
        return new ImmutablePair<>(items.get(Math.round(binding.sliderInternal.getValues().get(0))), items.get(Math.round(binding.sliderInternal.getValues().get(1))));
    }
View displays and maintains a slider where user can select single or range of items from a sorted item list.
main/src/main/java/cgeo/geocaching/ui/ItemRangeSlider.java