Great component, unfortunately I can't use it for my case because selection

Directory Multiselect Combo Box
1

Great component, unfortunately I can’t use it for my case because selection order is not kept. Is there a chance to improve? Thanks!

2

Yes, there it is: copy class MultiselectComboBox into your own code (so that it is higher prioritized at the build path than the original class) and exchange every new HashSet by new LinkedHashSet.
Additionally call setOrdered(false).
And sort your values in your ValueProvider when binding and return them in a LinkedHashSet.

Plus add this method to your MultiselectComboBox class:

	@Override
	protected boolean valueEquals(Set<T> value1, Set<T> value2) {
		if (super.valueEquals(value1, value2)) {
			if (value1 instanceof LinkedHashSet && value2 instanceof LinkedHashSet && value1.size() == value2.size()) {
				// Additionally check order of the entries
				Iterator<T> iterator1 = ((LinkedHashSet<T>) value1).iterator();
				Iterator<T> iterator2 = ((LinkedHashSet<T>) value2).iterator();
				while (iterator1.hasNext()) {
					if (!Objects.equals(iterator1.next(), iterator2.next())) { return false; }
				}
				return true;
			} else {
				return true;
			}
		}
		return false;
	}

My usecase was that I wanted a list of months ordered chronologically (March, April, May), not alphabetically (April, March, May). Works for the user as follows:
adding a new month (e.g. August) in the UI adds it at the end of the MultiselectCombobox, and after saving (and re-applying the domain object to the binder) the MultiselectCombobox shows March, April, May, August.