Bug 913

Summary:	NEWT: Support 'Continue Drag over on JComponent'
Product:	[JogAmp] Newt	Reporter:	jun.lee <jun.lee>
Component:	core	Assignee:	Sven Gothel <sgothel>
Status:	UNCONFIRMED ---
Severity:	enhancement
Priority:	---
Version:	1
Hardware:	All
OS:	all
Type:	---	SCM Refs:
Workaround:	---

Description jun.lee 2013-11-27 09:08:35 CET

Dragging over NEWT Window occurs NullPointerException when drag back to the JTree component witch started the dragging event.

Drag Start from JTree -> Drag Over to NEWT Window -> continue Drag Over again to JTree (NullPointerException occurs).

java.lang.NullPointerException
	at javax.swing.TransferHandler$DropHandler.handleDrag(TransferHandler.java:1449)
	at javax.swing.TransferHandler$DropHandler.dragOver(TransferHandler.java:1488)
	at java.awt.dnd.DropTarget.dragOver(DropTarget.java:381)
	at javax.swing.TransferHandler$SwingDropTarget.dragOver(TransferHandler.java:1250)
	at sun.awt.dnd.SunDropTargetContextPeer.processMotionMessage(SunDropTargetContextPeer.java:474)
	at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchMotionEvent(SunDropTargetContextPeer.java:823)
	at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchEvent(SunDropTargetContextPeer.java:769)
	at sun.awt.dnd.SunDropTargetEvent.dispatch(SunDropTargetEvent.java:48)
	at java.awt.Component.dispatchEventImpl(Component.java:4716)
	at java.awt.Container.dispatchEventImpl(Container.java:2287)
	at java.awt.Component.dispatchEvent(Component.java:4687)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
	at java.awt.LightweightDispatcher.processDropTargetEvent(Container.java:4566)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4417)
	at java.awt.Container.dispatchEventImpl(Container.java:2273)
	at java.awt.Window.dispatchEventImpl(Window.java:2719)
	at java.awt.Component.dispatchEvent(Component.java:4687)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:729)
	at java.awt.EventQueue.access$200(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:688)
	at java.awt.EventQueue$3.run(EventQueue.java:686)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.awt.EventQueue$4.run(EventQueue.java:702)
	at java.awt.EventQueue$4.run(EventQueue.java:700)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:699)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

Comment 1 Sven Gothel 2013-11-29 04:33:41 CET

The shown stack trace only includes Swing classes, NEWT does not seem to be involved.

Please provide a small test case / application for reproduction.

Also add the platform information as requested and described in Wiki/FAQ/Bugreport,
thank you.