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
null,	
		message, 
		QUESTION, 
		new String[] {IDialogConstants.OK_LABEL, IDialogConstants.CANCEL_LABEL}, 
		0); 	
	return dialog.open() == 0;
}
/** 
 * Convenience method to open a standard error dialog.
 *
 * @param parent the parent shell of the dialog, or <code>null</code> if none
 * @param title the dialog's title, or <code>null</code> if none
 * @param message the message
 */
public static void openError(Shell parent, String title, String message) {
	MessageDialog dialog = new MessageDialog(
		parent,
		title, 
		null,	
		message, 
		ERROR, 
		new String[] {IDialogConstants.OK_LABEL}, 
		0); 	
	dialog.open();
	return;
}
/** 
 * Convenience method to open a standard information dialog.
 *
 * @param parent the parent shell of the dialog, or <code>null</code> if none