This PR implements two new default methods on `ObservableList` to be able to replace elements at a given position or within a specified range.
Justification for this change is to allow an `ObservableList` to be bulk modified in a single `ListChangeListener` call back. In this way the callbacks don't observe the list changing its size from S to S-X back to S again(*). Currently the only way to bulk replace a range of items is to remove X items then add X items, resulting not in two listener callbacks in between which the size of the list can be observed to change. The other alternative is to call `set` individually for each item, which results in many change notifications. With the addition of this PR, and the changes in `ModifiableObservableListBase`, replacing a range of items becomes a single change callback. (*) The list may indeed change size still as plain `List` does not have `setAll` operations; size listeners may observe this, but it will no longer be observable from a `ListChangeListener` due to multiple separate callbacks. ------------- Commit messages: - Implement setAll with range for ObservableList Changes: https://git.openjdk.org/jfx/pull/1937/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1937&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8091429 Stats: 134 lines in 3 files changed: 133 ins; 1 del; 0 mod Patch: https://git.openjdk.org/jfx/pull/1937.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1937/head:pull/1937 PR: https://git.openjdk.org/jfx/pull/1937
