I have just come across the same issue in GWT 2.5.1 on IE8/9/10. I've used
CellTrees a lot and never seen this issue before.
I have avoided the issue by disabling the keyboard selection
tree.setKeyboardSelectionPolicy(KeyboardSelectionPolicy.DISABLED);
P.
On Thursday, 7 July 2011 11:36:15 UTC+1, rmartinsfidalgo wrote:
>
> Hi
>
> I have a little issue about the CellTree specially by deleting the
> last node.
> I created a normal CellTree with a root node and data nodes like this:
>
> ROOT
> >DATA A
> >DATA B
> >DATA C
>
> The Root contain the dataProvider (which is ListDataProvider) where I
> add data nodes or deleted.
> For adding the code is:
> dataProvider.getList().add(node);
> dataProvider.refresh();
> For deleting the code is:
> if (childNode != null && dataProvider.getList().contains(node)) {
> dataProvider.getList().remove(node);
> dataProvider.refresh();
> }
>
>
> This works fine in Chrome and in Firefox 3.5.
>
> But for IE 8.0. when I deleting the last node (in this case the DATA
> C) there is an JavaScriptException see below.
>
> Is there a workaround?
>
> com.google.gwt.core.client.JavaScriptException: (TypeError):
> 'firstChild' is null or not an object
> number: -2146823281
> description: 'firstChild' is null or not an object
>
> com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:
>
>
> 237)
>
> com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:
> 129)
> com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:
>
> 561)
>
> com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:
> 269)
>
> com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:
>
>
> 91)
> com.google.gwt.dom.client.DOMImpl.getFirstChildElement(DOMImpl.java)
>
>
> com.google.gwt.dom.client.Element$.getFirstChildElement$(Element.java:
>
> 241)
>
> com.google.gwt.user.cellview.client.CellTreeNodeView.getCellParent(CellTreeNodeView.java:
>
>
> 660)
>
> com.google.gwt.user.cellview.client.CellTreeNodeView.getCellParent(CellTreeNodeView.java:
>
>
> 1039)
>
> com.google.gwt.user.cellview.client.CellTreeNodeView.setKeyboardSelected(CellTreeNodeView.java:
>
>
> 1234)
>
> com.google.gwt.user.cellview.client.CellTree.keyboardSelect(CellTree.java:
> 884)
> com.google.gwt.user.cellview.client.CellTreeNodeView$NodeCellList
> $View.loadChildState(CellTreeNodeView.java:340)
> com.google.gwt.user.cellview.client.CellTreeNodeView$NodeCellList
> $View.replaceAllChildren(CellTreeNodeView.java:211)
>
> com.google.gwt.user.cellview.client.HasDataPresenter.resolvePendingState(HasDataPresenter.java:
>
>
> 1348)
> com.google.gwt.user.cellview.client.HasDataPresenter.access
> $3(HasDataPresenter.java:1112)
> com.google.gwt.user.cellview.client.HasDataPresenter
> $2.execute(HasDataPresenter.java:1037)
> com.google.gwt.core.client.impl.SchedulerImpl$Task$.executeScheduled$
>
> (SchedulerImpl.java:50)
>
> com.google.gwt.core.client.impl.SchedulerImpl.runScheduledTasks(SchedulerImpl.java:
>
>
> 229)
>
> com.google.gwt.core.client.impl.SchedulerImpl.flushFinallyCommands(SchedulerImpl.java:
>
>
> 328)
> com.google.gwt.core.client.impl.Impl.exit(Impl.java:238)
> com.google.gwt.core.client.impl.Impl.entry0(Impl.java:229)
> sun.reflect.GeneratedMethodAccessor40.invoke(Unknown Source)
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
>
>
> 25)
> java.lang.reflect.Method.invoke(Method.java:597)
> com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
>
> com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:
>
> 71)
>
> com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:
>
> 157)
>
> com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:
>
>
> 281)
>
> com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:
>
>
> 531)
>
> com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:
>
> 352)
> java.lang.Thread.run(Thread.java:662)
>
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