RFR: 8165749: java.lang.RuntimeException: dndGesture.dragboard is null in dragDrop
Jose Pereda
jpereda at openjdk.java.net
Wed Jan 6 16:24:08 UTC 2021
As commented in the JBS issue, there is one single `dndGesture` object in `Scene`, that can be instantiated from three different ways:
- DropTargetListener, on dragEnter
- DragGestureListener, on dragGestureRecognized or
- MouseHandler, processing a right mouse click (these two are mutually exclusive).
This PR prevents that, for two almost simultaneous drag events (for instance via mouse and touchpad), the `dndGesture` for the last of these events gets initialized again, losing all existing drag info (`dndGesture.dragboard`) that was added to the first one, avoiding the RTE.
The existing manual test [DndTest](https://github.com/openjdk/jfx/blob/master/tests/manual/dnd/DndTest.java) has been used on MacOS to verify the PR.
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Commit messages:
- Only instantiate dndGesture if previous drag gestures have finished
Changes: https://git.openjdk.java.net/jfx/pull/372/files
Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=372&range=00
Issue: https://bugs.openjdk.java.net/browse/JDK-8165749
Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
Patch: https://git.openjdk.java.net/jfx/pull/372.diff
Fetch: git fetch https://git.openjdk.java.net/jfx pull/372/head:pull/372
PR: https://git.openjdk.java.net/jfx/pull/372
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