Permutation of scene graph children
tom.schindl at bestsolution.at
Tue Dec 2 09:21:13 UTC 2014
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();
On 02.12.14 06:33, Anirvan Sarkar wrote:
> java.util.List doesn't support a swap operation but there is
> int, int)
> Also there exists a JIRA RT-39128
> <https://javafx-jira.kenai.com/browse/RT-39128> for getting swap support on
> On 1 December 2014 at 23:35, Werner Lehmann <lehmann at media-interactive.de>
>> 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?
Thomas Schindl, CTO
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