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.ui.ide/src/org/eclipse/ui/internal/ide/IDEWorkbenchAdvisor.java
AboutInfo info = AboutInfo.readFeatureInfo(featureId, featureVersionId, featureId);
			if (info != null && info.getWelcomePerspectiveId() != null && info.getWelcomePageURL() != null) {
				welcomePerspectiveInfos.add(info);
			}
		}
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.application.WorkbenchAdvisor#postStartup()
	 */
	public void postStartup() {
		try{
			refreshFromLocal();
			checkUpdates();
		}
		finally{
			Platform.getJobManager().resume();
		}
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.application.WorkbenchAdvisor#postShutdown
	 */
	public void postShutdown() {
		if (activityHelper != null) {
			activityHelper.shutdown();
			activityHelper = null;
		}
		if (IDEWorkbenchPlugin.getPluginWorkspace() != null) {
			disconnectFromWorkspace();
		}
	}