I'd rather like to see ObservableList.move()/swap() which since we now have Java8 this could be implemented as a default methods.
I think what you can do to make the swap only fire one event is to use Object[] data = l.toArray(); // reorder l.setAll(data); Tom On 02.12.14 06:33, Anirvan Sarkar wrote: > Hi, > > java.util.List doesn't support a swap operation but there is > Collections.swap(List, > int, int) > <https://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#swap-java.util.List-int-int->for > that. > > Also there exists a JIRA RT-39128 > <https://javafx-jira.kenai.com/browse/RT-39128> for getting swap support on > ObservableList. > > Regards, > Anirvan > > On 1 December 2014 at 23:35, Werner Lehmann <lehm...@media-interactive.de> > wrote: > >> Hi, >> >> occasionally I need to move a child in its children list and would like to >> avoid a remove/add operation. For example, this could be useful to change >> z-order in a StackPane, or change vertical order on a VBox, or when >> synchronizing item order in a model with corresponding node order in a skin. >> >> java.util.List does not support a move or swap operation. I had hoped a >> sort operation with a clever comparator might do the trick, triggering a >> permutation listchange event. However, any attempt in this direction bombs, >> complaining about "duplicate children added". On the other hand there is >> rudimentary support for this in Node.toFront and flags exist on Parent: >> "childrenTriggerPermutation", "childSetModified". >> >> Any thoughts about getting swap support on ObservableList and/or >> permutation support on Parent.children? >> >> Werner >> > > > -- Thomas Schindl, CTO BestSolution.at EDV Systemhaus GmbH Eduard-Bodem-Gasse 5-7, A-6020 Innsbruck http://www.bestsolution.at/ Reg. Nr. FN 222302s am Firmenbuchgericht Innsbruck
