Hi Everyone, My apolgies if this has been answered somewhere already,
but I couldn't find any reference to it.
I'm using GWT 2.3, and I have a CellTree, and I need to do some page
cleanup when a tree node is closed. I've added a CloseHandler to the
CellTree, but when I call event.getTarget() to get the node that is
closed I get an IllegalStateException ("TreeNode no longer exists.").
Is there some other way I can determine which TreeNode is being
closed? Is there another event that I can add a hanlder for that would
be fired before a node was closed? CellTree.addCloseHandler doesn't
seem very useful if it doesn't provide a way to determine which node
was closed...
Any ideas anyone has would be greatly appreciated. Thanks for
reading!
Relevant stack trace below.
com.google.gwt.event.shared.UmbrellaException: One or more exceptions
caught, see full set in UmbrellaException#getCauses
at
com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:
129)
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:124)
at
com.google.gwt.event.logical.shared.CloseEvent.fire(CloseEvent.java:
56)
at
com.google.gwt.event.logical.shared.CloseEvent.fire(CloseEvent.java:
41)
at
com.google.gwt.user.cellview.client.CellTreeNodeView.setOpen(CellTreeNodeView.java:
932)
at
com.google.gwt.user.cellview.client.CellTree.onBrowserEvent(CellTree.java:
690)
at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1321)
at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1277)
at sun.reflect.GeneratedMethodAccessor29.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at
com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at
com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:
167)
at
com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:
326)
at
com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:
207)
at
com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:
132)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:
561)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:
269)
at
com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:
91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:214)
at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at
com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at
com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:
167)
at
com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:
281)
at
com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:
531)
at
com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:
352)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.IllegalStateException: TreeNode no longer exists.
at com.google.gwt.user.cellview.client.CellTreeNodeView
$TreeNodeImpl.assertNotDestroyed(CellTreeNodeView.java:613)
at com.google.gwt.user.cellview.client.CellTreeNodeView
$TreeNodeImpl.getChildCount(CellTreeNodeView.java:542)
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