Bug 54347 [Dialogs] Provide "Yes No Always Never" dialog
In Debug UI, we define a dialog that prompts the user to answer Yes, No, Always, or Never. If anyone's interested, this code is generic and could be shipped as a JFace component. The dialog is in the org.eclipse.debug.ui project; the type name is AlwaysNeverDialog. The dialog supports passing in a preference store and preference key for the dialog to persist an Always or Never selection. For cases where clients don't have a preference store but still want to be able to get at the user's response, it alternatively supports passing in a string buffer where the dialog will store the "always/never/prompt" status.
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/MessageDialog.java
public final static int INFORMATION = 2;
	/**
	 * 	Constant for a dialog with a question image (value 3).
	 */
	public final static int QUESTION = 3;
	/**
	 * 	Constant for a dialog with a warning image (value 4).
	 */
	public final static int WARNING = 4;
	/**
	 * Labels for buttons in the button bar (localized strings).
	 */
	private String[] buttonLabels;
	/**
	 * The buttons. Parallels <code>buttonLabels</code>.
	 */
	private Button[] buttons;
	/**
	 * Index into <code>buttonLabels</code> of the default button.
	 */
	private int defaultButtonIndex;
	/**
	 * Dialog title (a localized string).
	 */
	private String title;
	/**
	 * Dialog title image.
	 */
	private Image titleImage;
	/**