Bug 162916 [Undo] [IDE] Invalid thread access from new file wizard
Build: I20061031-0656 1) Create a simple project 2) In the file system, add file "a.txt" to the project 3) Back in Eclipse, do File > New > File, select the project and enter a name of "a.txt". An internal error occurs because it is trying to open an error dialog from a modal context thread: org.eclipse.swt.SWTException: Invalid thread access at org.eclipse.swt.SWT.error(SWT.java:3407) at org.eclipse.swt.SWT.error(SWT.java:3330) at org.eclipse.swt.SWT.error(SWT.java:3301) at org.eclipse.swt.widgets.Widget.error(Widget.java:432) at org.eclipse.swt.widgets.Shell.<init>(Shell.java:271) at org.eclipse.swt.widgets.Shell.<init>(Shell.java:357) at org.eclipse.jface.window.Window.createShell(Window.java:482) at org.eclipse.jface.window.Window.create(Window.java:425) at org.eclipse.jface.dialogs.Dialog.create(Dialog.java:1111) at org.eclipse.jface.window.Window.open(Window.java:785) at org.eclipse.jface.dialogs.ErrorDialog.open(ErrorDialog.java:296) at org.eclipse.jface.dialogs.ErrorDialog.openError(ErrorDialog.java:360) at org.eclipse.jface.dialogs.ErrorDialog.openError(ErrorDialog.java:325) at org.eclipse.ui.dialogs.WizardNewFileCreationPage$4.run(WizardNewFileCreationPage.java:343) at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:113)
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/WizardNewFileCreationPage.java
* Note that this page caches the new file once it has been successfully
     * created; subsequent invocations of this method will answer the same
     * file resource without attempting to create it again.
     * </p>
     * <p>
     * This method should be called within a workspace modify operation since
     * it creates resources.
     * </p>
     *
     * @return the created file resource, or <code>null</code> if the file
     *    was not created
     */
    public IFile createNewFile() {
        if (newFile != null) {
			return newFile;
		}
        
        final IPath containerPath = resourceGroup.getContainerFullPath();
        IPath newFilePath = containerPath.append(resourceGroup.getResource());
        final IFile newFileHandle = createFileHandle(newFilePath);
        final InputStream initialContents = getInitialContents();
        createLinkTarget();
		IRunnableWithProgress op = new IRunnableWithProgress() {
			public void run(IProgressMonitor monitor) throws InvocationTargetException {
				CreateFileOperation op = new CreateFileOperation(
						newFileHandle, linkTargetPath, initialContents,
						IDEWorkbenchMessages.WizardNewFileCreationPage_title);
				try {
					PlatformUI.getWorkbench().getOperationSupport()
							.getOperationHistory().execute(op, monitor,