Bug 111453 [preferences] Improve preview of enum constant formatting
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/formatter/LineWrappingTabPage.java
fCategoriesViewer.addDoubleClickListener(fCategoryListener);
		
		fForceSplit.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				forceSplitChanged(fForceSplit.getSelection());
			}
		});
		fIndentStyleCombo.addSelectionListener( new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				indentStyleChanged(((Combo)e.widget).getSelectionIndex());
			}
		});
		fWrappingStyleCombo.addSelectionListener( new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				wrappingStyleChanged(((Combo)e.widget).getSelectionIndex());
			}
		});
		
		fCategoryListener.restoreSelection();
		
		fDefaultFocusManager.add(fCategoriesViewer.getControl());
		fDefaultFocusManager.add(fWrappingStyleCombo);
		fDefaultFocusManager.add(fIndentStyleCombo);
		fDefaultFocusManager.add(fForceSplit);
	}
	
	protected void doUpdatePreview() {
		final Object normalSetting= fWorkingValues.get(LINE_SPLIT);
		fWorkingValues.put(LINE_SPLIT, fPreviewPreferences.get(LINE_SPLIT));
		fPreview.update();