Is VBox serializable?

[Jonathan Giles]

When you start the drag, rather than insert the visual nodes into the 
drag board, you should be inserting the relevant serializable domain 
data instead. Then, when the domain data is dropped elsewhere, you 
should create the relevant visual nodes at that point.

-- Jonathan

On 6/10/2012 5:10 a.m., John McDonnell wrote:
> Hey all.
>
> I am working adding some drag and drop functionality to a project I have,
> where I have a list of nodes, and I would like a user to be able to drag a
> item from a list and drop it elsewhere within the scene.
>
> When displaying the items in the list cells, I have a Region,
> TrafficListingItem, which contains a VBox.  When I add the
> TrafficListingItem to the Dragboard, I get an the following error:
>
> Exception in thread "JavaFX Application Thread"
> java.lang.IllegalArgumentException: Could not serialize the data
> at
> com.sun.javafx.tk.quantum.QuantumClipboard.putContent(QuantumClipboard.java:500)
> at javafx.scene.input.Clipboard.setContent(Clipboard.java:226)
> at
> ie.john.client.core.platform.TrafficListingItem.drag(TrafficListingItem.java:105)
> at
> ie.john.client.main.controller.MainPaneController$TrafficCell$1.handle(MainPaneController.java:101)
> at
> ie.john.client.main.controller.MainPaneController$TrafficCell$1.handle(MainPaneController.java:96)
> at
> com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:69)
> at
> com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217)
> at
> com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170)
> at
> com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38)
> at
> com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
> at
> com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
> at
> com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
> at
> com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
> at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53)
> at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:33)
> at javafx.event.Event.fireEvent(Event.java:171)
> at javafx.scene.Scene$DnDGesture.fireEvent(Scene.java:2627)
> at javafx.scene.Scene$DnDGesture.process(Scene.java:2706)
> at javafx.scene.Scene$DnDGesture.access$8700(Scene.java:2603)
> at javafx.scene.Scene$MouseHandler.process(Scene.java:3340)
> at javafx.scene.Scene$MouseHandler.process(Scene.java:3164)
> at javafx.scene.Scene$MouseHandler.access$1900(Scene.java:3119)
> at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1559)
> at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2261)
> at
> com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:228)
> at com.sun.glass.ui.View.handleMouseEvent(View.java:528)
> at com.sun.glass.ui.View.notifyMouse(View.java:922)
> at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
> at com.sun.glass.ui.gtk.GtkApplication$3$1.run(GtkApplication.java:82)
> at java.lang.Thread.run(Thread.java:722)
> Caused by: java.io.NotSerializableException: javafx.scene.layout.VBox
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1180)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528)
> at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416)
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528)
> at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416)
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)
> at
> com.sun.javafx.tk.quantum.QuantumClipboard.putContent(QuantumClipboard.java:496)
> ... 81 more
>
>
> It appears as though VBox is not serialisable?  Is this correct?  If it is
> how would one go about dragging a node that contains a VBox within the
> Drag/Drop Events system of JavaFX?
>
>