closing the AutoGrader window causes cascading errors that make me have to restart Eclipse

[atiti]

This "Widget is disposed" bullshit is driving me crazy. The Error Log reports the following exceptions that seem to be related:

{{{
Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench".

org.eclipse.swt.SWTException: Widget is disposed
at org.eclipse.swt.SWT.error(SWT.java:4083)
at org.eclipse.swt.SWT.error(SWT.java:3998)
at org.eclipse.swt.SWT.error(SWT.java:3969)
at org.eclipse.swt.widgets.Widget.error(Widget.java:715)
at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:531)
at org.eclipse.swt.widgets.Control.getSize(Control.java:1727)
at ie.ucd.autograder.views.AutoGraderView.updateSelectedProject(AutoGraderView.java:84)
at ie.ucd.autograder.views.AutoGraderView.updateView(AutoGraderView.java:52)
at ie.ucd.autograder.views.AutoGraderView.access$1(AutoGraderView.java:42)
at ie.ucd.autograder.views.AutoGraderView$2.selectionChanged(AutoGraderView.java:129)
at org.eclipse.ui.internal.AbstractPartSelectionTracker$1.run(AbstractPartSelectionTracker.java:119)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.runtime.Platform.run(Platform.java:888)
at org.eclipse.ui.internal.AbstractPartSelectionTracker.fireSelection(AbstractPartSelectionTracker.java:117)
at org.eclipse.ui.internal.WindowPartSelectionTracker$1.selectionChanged(WindowPartSelectionTracker.java:38)
at org.eclipse.ui.internal.AbstractPartSelectionTracker$1.run(AbstractPartSelectionTracker.java:119)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.runtime.Platform.run(Platform.java:888)
at org.eclipse.ui.internal.AbstractPartSelectionTracker.fireSelection(AbstractPartSelectionTracker.java:117)
at org.eclipse.ui.internal.PagePartSelectionTracker$1.selectionChanged(PagePartSelectionTracker.java:49)
at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:162)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:160)
at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2162)
at org.eclipse.jface.viewers.StructuredViewer.handleSelect(StructuredViewer.java:1190)
at org.eclipse.jface.viewers.StructuredViewer$4.widgetSelected(StructuredViewer.java:1220)
at org.eclipse.jface.util.OpenStrategy.fireSelectionEvent(OpenStrategy.java:228)
at org.eclipse.jface.util.OpenStrategy.access$4(OpenStrategy.java:222)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:389)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:3783)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1375)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1398)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1383)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1195)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3629)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3284)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
at org.eclipse.equinox.launcher.Main.run(Main.java:1408)
}}}

[atiti]

From: fintan (GH: fintanf) Date: Fri Jun 3 16:25:13 2011

Unfortunately the changes made by Dan in [75701] created a regression whereby we were attempting to redraw a disposed widget. In [75710] I guarded these calls to be only performed when the widget is not disposed. It works in my local testing. If you encounter this issue again please describe the interaction that led to it (e.g. closed AG view and then changed project selection).

I've released version 0.3.1 on the update site, please upgrade and test.