Bug 3248 Creating a new class creates 3 entries in local history (1GE4TOC)
Creating a new class with the class wizard creates 3 entries in the local history. The oldest is empty, the others have the same content. NOTES: EG (5/23/2001 11:35:43 AM) is the wizard setting the contents 3 times? MA (5/25/01 10:10:32 AM) JDOM automatically saves the content 2 times add import: I have to save, otherwise create hierarchy does not succeed. EG (5/30/01 9:43:51 AM) JDOM should provide control over the saving behaviour and not do it automatically. Moving to JCORE for comment.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/wizards/NewTypeWizardPage.java
*/
	private void updateEnableState() {
		boolean enclosing= isEnclosingTypeSelected();
		fPackageDialogField.setEnabled(fCanModifyPackage && !enclosing);
		fEnclosingTypeDialogField.setEnabled(fCanModifyEnclosingType && enclosing);
	}	
	/**
	 * Hook method that gets called when the enclosing type name has changed. The method 
	 * validates the enclosing type and returns the status of the validation. It also updates the 
	 * enclosing type model.
	 * <p>
	 * Subclasses may extend this method to perform their own validation.
	 * </p>
	 * 
	 * @return the status of the validation
	 */
	protected IStatus enclosingTypeChanged() {
		StatusInfo status= new StatusInfo();
		fCurrEnclosingType= null;
		
		IPackageFragmentRoot root= getPackageFragmentRoot();
		
		fEnclosingTypeDialogField.enableButton(root != null);
		if (root == null) {
			status.setError(""); 
			return status;
		}
		
		String enclName= getEnclosingTypeText();
		if (enclName.length() == 0) {