SEBWIN-141: Basic draft of action center including keyboard and touch activators.

SafeExamBrowser.Browser/BrowserApplicationController.cs

@@ -19,7 +19,7 @@ using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.UserInterface;
 using SafeExamBrowser.Contracts.UserInterface.MessageBox;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 using BrowserSettings = SafeExamBrowser.Contracts.Configuration.Settings.BrowserSettings;
 
 namespace SafeExamBrowser.Browser

SafeExamBrowser.Client.UnitTests/ClientControllerTests.cs

@@ -24,7 +24,7 @@ using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.Monitoring;
 using SafeExamBrowser.Contracts.UserInterface;
 using SafeExamBrowser.Contracts.UserInterface.MessageBox;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 using SafeExamBrowser.Contracts.UserInterface.Windows;
 using SafeExamBrowser.Contracts.WindowsApi;
 
@@ -34,6 +34,7 @@ namespace SafeExamBrowser.Client.UnitTests
 	public class ClientControllerTests
 	{
 		private AppConfig appConfig;
+		private Mock<IActionCenter> actionCenter;
 		private Mock<IBrowserApplicationController> browserController;
 		private Mock<IClientHost> clientHost;
 		private Mock<IDisplayMonitor> displayMonitor;
@@ -58,6 +59,7 @@ namespace SafeExamBrowser.Client.UnitTests
 		public void Initialize()
 		{
 			appConfig = new AppConfig();
+			actionCenter = new Mock<IActionCenter>();
 			browserController = new Mock<IBrowserApplicationController>();
 			clientHost = new Mock<IClientHost>();
 			displayMonitor = new Mock<IDisplayMonitor>();
@@ -81,6 +83,7 @@ namespace SafeExamBrowser.Client.UnitTests
 			uiFactory.Setup(u => u.CreateSplashScreen(It.IsAny<AppConfig>())).Returns(new Mock<ISplashScreen>().Object);
 
 			sut = new ClientController(
+				actionCenter.Object,
 				displayMonitor.Object,
 				explorerShell.Object,
 				hashAlgorithm.Object,
@@ -632,6 +635,21 @@ namespace SafeExamBrowser.Client.UnitTests
 			splashScreen.VerifySet(s => s.AppConfig = appConfig, Times.Once);
 		}
 
+		[TestMethod]
+		public void Startup_MustCorrectlyHandleTaskbar()
+		{
+			operationSequence.Setup(o => o.TryPerform()).Returns(OperationResult.Success);
+			sut.TryStart();
+
+			taskbar.Verify(t => t.Show(), Times.Once);
+
+			taskbar.Reset();
+			operationSequence.Setup(o => o.TryPerform()).Returns(OperationResult.Aborted);
+			sut.TryStart();
+
+			taskbar.Verify(t => t.Show(), Times.Never);
+		}
+
 		[TestMethod]
 		public void WindowMonitor_MustHandleAllowedWindowChangeCorrectly()
 		{

SafeExamBrowser.Client.UnitTests/Notifications/NotificationButtonMock.cs

@@ -6,8 +6,8 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 
 namespace SafeExamBrowser.Client.UnitTests.Notifications
 {

SafeExamBrowser.Client.UnitTests/Operations/BrowserOperationTests.cs

@@ -12,7 +12,7 @@ using SafeExamBrowser.Client.Operations;
 using SafeExamBrowser.Contracts.Applications;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.UserInterface;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 
 namespace SafeExamBrowser.Client.UnitTests.Operations
 {

SafeExamBrowser.Client.UnitTests/Operations/DisplayMonitorOperationTests.cs

@@ -11,7 +11,7 @@ using Moq;
 using SafeExamBrowser.Client.Operations;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.Monitoring;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 
 namespace SafeExamBrowser.Client.UnitTests.Operations
 {

SafeExamBrowser.Client.UnitTests/Operations/TaskbarOperationTests.cs

@@ -15,7 +15,7 @@ using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.SystemComponents;
 using SafeExamBrowser.Contracts.UserInterface;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 
 namespace SafeExamBrowser.Client.UnitTests.Operations
 {
@@ -33,7 +33,6 @@ namespace SafeExamBrowser.Client.UnitTests.Operations
 		private Mock<ISystemComponent<ISystemWirelessNetworkControl>> wirelessNetworkMock;
 		private Mock<ISystemInfo> systemInfoMock;
 		private Mock<ITaskbar> taskbarMock;
-		private Mock<IText> textMock;
 		private Mock<IUserInterfaceFactory> uiFactoryMock;
 
 		private TaskbarOperation sut;
@@ -52,7 +51,6 @@ namespace SafeExamBrowser.Client.UnitTests.Operations
 			systemInfoMock = new Mock<ISystemInfo>();
 			taskbarMock = new Mock<ITaskbar>();
 			settings = new TaskbarSettings();
-			textMock = new Mock<IText>();
 			uiFactoryMock = new Mock<IUserInterfaceFactory>();
 
 			settings.AllowApplicationLog = true;
@@ -73,7 +71,6 @@ namespace SafeExamBrowser.Client.UnitTests.Operations
 				systemInfoMock.Object,
 				taskbarMock.Object,
 				settings,
-				textMock.Object,
 				uiFactoryMock.Object);
 		}
 

SafeExamBrowser.Client/App.cs

@@ -62,12 +62,7 @@ namespace SafeExamBrowser.Client
 
 			var success = instances.ClientController.TryStart();
 
-			if (success)
+			if (!success)
-			{
-				MainWindow = instances.Taskbar;
-				MainWindow.Show();
-			}
-			else
 			{
 				Shutdown();
 			}

SafeExamBrowser.Client/ClientController.cs

@@ -24,7 +24,7 @@ using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.Monitoring;
 using SafeExamBrowser.Contracts.UserInterface;
 using SafeExamBrowser.Contracts.UserInterface.MessageBox;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 using SafeExamBrowser.Contracts.UserInterface.Windows;
 using SafeExamBrowser.Contracts.WindowsApi;
 
@@ -32,6 +32,7 @@ namespace SafeExamBrowser.Client
 {
 	internal class ClientController : IClientController
 	{
+		private IActionCenter actionCenter;
 		private IDisplayMonitor displayMonitor;
 		private IExplorerShell explorerShell;
 		private IHashAlgorithm hashAlgorithm;
@@ -67,6 +68,7 @@ namespace SafeExamBrowser.Client
 		}
 
 		public ClientController(
+			IActionCenter actionCenter,
 			IDisplayMonitor displayMonitor,
 			IExplorerShell explorerShell,
 			IHashAlgorithm hashAlgorithm,
@@ -81,6 +83,7 @@ namespace SafeExamBrowser.Client
 			IUserInterfaceFactory uiFactory,
 			IWindowMonitor windowMonitor)
 		{
+			this.actionCenter = actionCenter;
 			this.displayMonitor = displayMonitor;
 			this.explorerShell = explorerShell;
 			this.hashAlgorithm = hashAlgorithm;
@@ -109,14 +112,13 @@ namespace SafeExamBrowser.Client
 			if (success)
 			{
 				RegisterEvents();
+				ShowShell();
 				StartBrowser();
 
 				var communication = runtime.InformClientReady();
 
 				if (communication.Success)
 				{
-					splashScreen.Close();
-
 					logger.Info("Application successfully initialized.");
 					logger.Log(string.Empty);
 				}
@@ -132,6 +134,8 @@ namespace SafeExamBrowser.Client
 				logger.Log(string.Empty);
 			}
 
+			splashScreen.Close();
+
 			return success;
 		}
 
@@ -141,7 +145,8 @@ namespace SafeExamBrowser.Client
 			logger.Info("Initiating shutdown procedure...");
 
 			splashScreen = uiFactory.CreateSplashScreen(appConfig);
-			splashScreen.Show();
+			actionCenter.Close();
+			taskbar.Close();
 
 			DeregisterEvents();
 
@@ -197,6 +202,14 @@ namespace SafeExamBrowser.Client
 			}
 		}
 
+		private void ShowShell()
+		{
+			if (Settings.Taskbar.EnableTaskbar)
+			{
+				taskbar.Show();
+			}
+		}
+
 		private void StartBrowser()
 		{
 			logger.Info("Starting browser application...");
@@ -321,7 +334,6 @@ namespace SafeExamBrowser.Client
 
 		private void ClientHost_Shutdown()
 		{
-			taskbar.Close();
 			shutdown.Invoke();
 		}
 
@@ -363,7 +375,6 @@ namespace SafeExamBrowser.Client
 			logger.Error("Lost connection to the runtime!");
 			messageBox.Show(TextKey.MessageBox_ApplicationError, TextKey.MessageBox_ApplicationErrorTitle, icon: MessageBoxIcon.Error);
 
-			taskbar.Close();
 			shutdown.Invoke();
 		}
 

SafeExamBrowser.Client/CompositionRoot.cs

@@ -30,6 +30,7 @@ using SafeExamBrowser.Contracts.Monitoring;
 using SafeExamBrowser.Contracts.SystemComponents;
 using SafeExamBrowser.Contracts.UserInterface;
 using SafeExamBrowser.Contracts.UserInterface.MessageBox;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 using SafeExamBrowser.Contracts.WindowsApi;
 using SafeExamBrowser.Core.OperationModel;
 using SafeExamBrowser.Core.Operations;
@@ -48,27 +49,31 @@ namespace SafeExamBrowser.Client
 {
 	internal class CompositionRoot
 	{
+		private ClientConfiguration configuration;
 		private string logFilePath;
 		private LogLevel logLevel;
 		private string runtimeHostUri;
 		private Guid startupToken;
 
+		private IActionCenter actionCenter;
 		private IBrowserApplicationController browserController;
-		private ClientConfiguration configuration;
 		private IClientHost clientHost;
 		private ILogger logger;
 		private IMessageBox messageBox;
 		private IProcessMonitor processMonitor;
 		private INativeMethods nativeMethods;
 		private IRuntimeProxy runtimeProxy;
+		private ISystemComponent<ISystemKeyboardLayoutControl> keyboardLayout;
+		private ISystemComponent<ISystemPowerSupplyControl> powerSupply;
+		private ISystemComponent<ISystemWirelessNetworkControl> wirelessNetwork;
 		private ISystemInfo systemInfo;
+		private ITaskbar taskbar;
 		private IText text;
 		private ITextResource textResource;
 		private IUserInterfaceFactory uiFactory;
 		private IWindowMonitor windowMonitor;
 
 		internal IClientController ClientController { get; private set; }
-		internal Taskbar Taskbar { get; private set; }
 
 		internal void BuildObjectGraph(Action shutdown)
 		{
@@ -82,18 +87,21 @@ namespace SafeExamBrowser.Client
 			InitializeLogging();
 			InitializeText();
 
+			actionCenter = new ActionCenter();
+			keyboardLayout = new KeyboardLayout(new ModuleLogger(logger, nameof(KeyboardLayout)), text);
 			messageBox = new MessageBox(text);
+			powerSupply = new PowerSupply(new ModuleLogger(logger, nameof(PowerSupply)), text);
 			processMonitor = new ProcessMonitor(new ModuleLogger(logger, nameof(ProcessMonitor)), nativeMethods);
 			uiFactory = new UserInterfaceFactory(text);
 			runtimeProxy = new RuntimeProxy(runtimeHostUri, new ProxyObjectFactory(), new ModuleLogger(logger, nameof(RuntimeProxy)));
+			taskbar = new Taskbar(new ModuleLogger(logger, nameof(taskbar)));
 			windowMonitor = new WindowMonitor(new ModuleLogger(logger, nameof(WindowMonitor)), nativeMethods);
+			wirelessNetwork = new WirelessNetwork(new ModuleLogger(logger, nameof(WirelessNetwork)), text);
 
 			var displayMonitor = new DisplayMonitor(new ModuleLogger(logger, nameof(DisplayMonitor)), nativeMethods);
 			var explorerShell = new ExplorerShell(new ModuleLogger(logger, nameof(ExplorerShell)), nativeMethods);
 			var hashAlgorithm = new HashAlgorithm();
 
-			Taskbar = new Taskbar(new ModuleLogger(logger, nameof(Taskbar)));
-
 			var operations = new Queue<IOperation>();
 
 			operations.Enqueue(new InitializationOperation(logger));
@@ -104,18 +112,33 @@ namespace SafeExamBrowser.Client
 			operations.Enqueue(new LazyInitializationOperation(BuildClientHostOperation));
 			operations.Enqueue(new LazyInitializationOperation(BuildClientHostDisconnectionOperation));
 			operations.Enqueue(new LazyInitializationOperation(BuildKeyboardInterceptorOperation));
+			operations.Enqueue(new LazyInitializationOperation(BuildMouseInterceptorOperation));
 			operations.Enqueue(new LazyInitializationOperation(BuildWindowMonitorOperation));
 			operations.Enqueue(new LazyInitializationOperation(BuildProcessMonitorOperation));
-			operations.Enqueue(new DisplayMonitorOperation(displayMonitor, logger, Taskbar));
+			operations.Enqueue(new DisplayMonitorOperation(displayMonitor, logger, taskbar));
+			operations.Enqueue(new LazyInitializationOperation(BuildActionCenterOperation));
 			operations.Enqueue(new LazyInitializationOperation(BuildTaskbarOperation));
 			operations.Enqueue(new LazyInitializationOperation(BuildBrowserOperation));
 			operations.Enqueue(new ClipboardOperation(logger, nativeMethods));
-			operations.Enqueue(new LazyInitializationOperation(BuildMouseInterceptorOperation));
 			operations.Enqueue(new DelegateOperation(UpdateClientControllerDependencies));
 
 			var sequence = new OperationSequence(logger, operations);
 
-			ClientController = new ClientController(displayMonitor, explorerShell, hashAlgorithm, logger, messageBox, sequence, processMonitor, runtimeProxy, shutdown, Taskbar, text, uiFactory, windowMonitor);
+			ClientController = new ClientController(
+				actionCenter,
+				displayMonitor,
+				explorerShell,
+				hashAlgorithm,
+				logger,
+				messageBox,
+				sequence,
+				processMonitor,
+				runtimeProxy,
+				shutdown,
+				taskbar,
+				text,
+				uiFactory,
+				windowMonitor);
 		}
 
 		internal void LogStartupInformation()
@@ -173,12 +196,41 @@ namespace SafeExamBrowser.Client
 			textResource = new XmlTextResource(path);
 		}
 
+		private IOperation BuildActionCenterOperation()
+		{
+			var aboutInfo = new AboutNotificationInfo(text);
+			var aboutController = new AboutNotificationController(configuration.AppConfig, uiFactory);
+			var logInfo = new LogNotificationInfo(text);
+			var logController = new LogNotificationController(logger, uiFactory);
+			var activators = new IActionCenterActivator[]
+			{
+				new KeyboardActivator(new ModuleLogger(logger, nameof(KeyboardActivator))),
+				new TouchActivator(new ModuleLogger(logger, nameof(TouchActivator)))
+			};
+			var operation = new ActionCenterOperation(
+				actionCenter,
+				activators,
+				logger,
+				aboutInfo,
+				aboutController,
+				logInfo,
+				logController,
+				keyboardLayout,
+				powerSupply,
+				wirelessNetwork,
+				configuration.Settings.ActionCenter,
+				systemInfo,
+				uiFactory);
+
+			return operation;
+		}
+
 		private IOperation BuildBrowserOperation()
 		{
 			var moduleLogger = new ModuleLogger(logger, "BrowserController");
 			var browserController = new BrowserApplicationController(configuration.AppConfig, configuration.Settings.Browser, messageBox, moduleLogger, text, uiFactory);
 			var browserInfo = new BrowserApplicationInfo();
-			var operation = new BrowserOperation(browserController, browserInfo, logger, Taskbar, uiFactory);
+			var operation = new BrowserOperation(browserController, browserInfo, logger, taskbar, uiFactory);
 
 			this.browserController = browserController;
 
@@ -232,12 +284,21 @@ namespace SafeExamBrowser.Client
 		{
 			var aboutInfo = new AboutNotificationInfo(text);
 			var aboutController = new AboutNotificationController(configuration.AppConfig, uiFactory);
-			var keyboardLayout = new KeyboardLayout(new ModuleLogger(logger, nameof(KeyboardLayout)), text);
-			var logController = new LogNotificationController(logger, uiFactory);
 			var logInfo = new LogNotificationInfo(text);
-			var powerSupply = new PowerSupply(new ModuleLogger(logger, nameof(PowerSupply)), text);
+			var logController = new LogNotificationController(logger, uiFactory);
-			var wirelessNetwork = new WirelessNetwork(new ModuleLogger(logger, nameof(WirelessNetwork)), text);
+			var operation = new TaskbarOperation(
-			var operation = new TaskbarOperation(logger, aboutInfo, aboutController, logInfo, logController, keyboardLayout, powerSupply, wirelessNetwork, systemInfo, Taskbar, configuration.Settings.Taskbar, text, uiFactory);
+				logger,
+				aboutInfo,
+				aboutController,
+				logInfo,
+				logController,
+				keyboardLayout,
+				powerSupply,
+				wirelessNetwork,
+				systemInfo,
+				taskbar,
+				configuration.Settings.Taskbar,
+				uiFactory);
 
 			return operation;
 		}

SafeExamBrowser.Client/Notifications/AboutNotificationController.cs

@@ -9,7 +9,7 @@
 using SafeExamBrowser.Contracts.Client;
 using SafeExamBrowser.Contracts.Configuration;
 using SafeExamBrowser.Contracts.UserInterface;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 using SafeExamBrowser.Contracts.UserInterface.Windows;
 
 namespace SafeExamBrowser.Client.Notifications

SafeExamBrowser.Client/Notifications/LogNotificationController.cs

@@ -9,7 +9,7 @@
 using SafeExamBrowser.Contracts.Client;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.UserInterface;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 using SafeExamBrowser.Contracts.UserInterface.Windows;
 
 namespace SafeExamBrowser.Client.Notifications

SafeExamBrowser.Client/Operations/ActionCenterOperation.cs

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+using System.Collections.Generic;
+using SafeExamBrowser.Contracts.Client;
+using SafeExamBrowser.Contracts.Configuration.Settings;
+using SafeExamBrowser.Contracts.Core.OperationModel;
+using SafeExamBrowser.Contracts.Core.OperationModel.Events;
+using SafeExamBrowser.Contracts.Logging;
+using SafeExamBrowser.Contracts.SystemComponents;
+using SafeExamBrowser.Contracts.UserInterface;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
+
+namespace SafeExamBrowser.Client.Operations
+{
+	internal class ActionCenterOperation : IOperation
+	{
+		private IActionCenter actionCenter;
+		private IEnumerable<IActionCenterActivator> activators;
+		private ILogger logger;
+		private INotificationInfo aboutInfo;
+		private INotificationController aboutController;
+		private INotificationInfo logInfo;
+		private INotificationController logController;
+		private ISystemComponent<ISystemKeyboardLayoutControl> keyboardLayout;
+		private ISystemComponent<ISystemPowerSupplyControl> powerSupply;
+		private ISystemComponent<ISystemWirelessNetworkControl> wirelessNetwork;
+		private ActionCenterSettings settings;
+		private ISystemInfo systemInfo;
+		private IUserInterfaceFactory uiFactory;
+
+		public event ActionRequiredEventHandler ActionRequired { add { } remove { } }
+		public event StatusChangedEventHandler StatusChanged;
+
+		public ActionCenterOperation(
+			IActionCenter actionCenter,
+			IEnumerable<IActionCenterActivator> activators,
+			ILogger logger,
+			INotificationInfo aboutInfo,
+			INotificationController aboutController,
+			INotificationInfo logInfo,
+			INotificationController logController,
+			ISystemComponent<ISystemKeyboardLayoutControl> keyboardLayout,
+			ISystemComponent<ISystemPowerSupplyControl> powerSupply,
+			ISystemComponent<ISystemWirelessNetworkControl> wirelessNetwork,
+			ActionCenterSettings settings,
+			ISystemInfo systemInfo,
+			IUserInterfaceFactory uiFactory)
+		{
+			this.actionCenter = actionCenter;
+			this.activators = activators;
+			this.logger = logger;
+			this.aboutInfo = aboutInfo;
+			this.aboutController = aboutController;
+			this.logInfo = logInfo;
+			this.logController = logController;
+			this.keyboardLayout = keyboardLayout;
+			this.powerSupply = powerSupply;
+			this.wirelessNetwork = wirelessNetwork;
+			this.systemInfo = systemInfo;
+			this.settings = settings;
+			this.uiFactory = uiFactory;
+		}
+
+		public OperationResult Perform()
+		{
+			foreach (var activator in activators)
+			{
+				actionCenter.Register(activator);
+				activator.Start();
+			}
+
+			return OperationResult.Success;
+		}
+
+		public OperationResult Revert()
+		{
+			foreach (var activator in activators)
+			{
+				activator.Stop();
+			}
+
+			return OperationResult.Success;
+		}
+	}
+}

SafeExamBrowser.Client/Operations/BrowserOperation.cs

@@ -12,7 +12,7 @@ using SafeExamBrowser.Contracts.Core.OperationModel.Events;
 using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.UserInterface;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 
 namespace SafeExamBrowser.Client.Operations
 {

SafeExamBrowser.Client/Operations/DisplayMonitorOperation.cs

@@ -11,7 +11,7 @@ using SafeExamBrowser.Contracts.Core.OperationModel.Events;
 using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.Monitoring;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 
 namespace SafeExamBrowser.Client.Operations
 {

SafeExamBrowser.Client/Operations/TaskbarOperation.cs

@@ -14,7 +14,7 @@ using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.SystemComponents;
 using SafeExamBrowser.Contracts.UserInterface;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 
 namespace SafeExamBrowser.Client.Operations
 {
@@ -32,7 +32,6 @@ namespace SafeExamBrowser.Client.Operations
 		private ISystemInfo systemInfo;
 		private ITaskbar taskbar;
 		private IUserInterfaceFactory uiFactory;
-		private IText text;
 
 		public event ActionRequiredEventHandler ActionRequired { add { } remove { } }
 		public event StatusChangedEventHandler StatusChanged;
@@ -49,7 +48,6 @@ namespace SafeExamBrowser.Client.Operations
 			ISystemInfo systemInfo,
 			ITaskbar taskbar,
 			TaskbarSettings settings,
-			IText text,
 			IUserInterfaceFactory uiFactory)
 		{
 			this.aboutInfo = aboutInfo;
@@ -62,37 +60,44 @@ namespace SafeExamBrowser.Client.Operations
 			this.settings = settings;
 			this.systemInfo = systemInfo;
 			this.taskbar = taskbar;
-			this.text = text;
 			this.uiFactory = uiFactory;
 			this.wirelessNetwork = wirelessNetwork;
 		}
 
 		public OperationResult Perform()
 		{
-			logger.Info("Initializing taskbar...");
 			StatusChanged?.Invoke(TextKey.OperationStatus_InitializeTaskbar);
 
-			AddAboutNotification();
+			if (settings.EnableTaskbar)
-			taskbar.ShowClock = settings.ShowClock;
-
-			if (settings.AllowApplicationLog)
 			{
-				AddLogNotification();
+				logger.Info("Initializing taskbar...");
+
+				AddAboutNotification();
+				taskbar.ShowClock = settings.ShowClock;
+
+				if (settings.AllowApplicationLog)
+				{
+					AddLogNotification();
+				}
+
+				if (settings.AllowKeyboardLayout)
+				{
+					AddKeyboardLayoutControl();
+				}
+
+				if (settings.AllowWirelessNetwork)
+				{
+					AddWirelessNetworkControl();
+				}
+
+				if (systemInfo.HasBattery)
+				{
+					AddPowerSupplyControl();
+				}
 			}
-
+			else
-			if (settings.AllowKeyboardLayout)
 			{
-				AddKeyboardLayoutControl();
+				logger.Info("Taskbar is disabled, skipping initialization.");
-			}
-
-			if (settings.AllowWirelessNetwork)
-			{
-				AddWirelessNetworkControl();
-			}
-
-			if (systemInfo.HasBattery)
-			{
-				AddPowerSupplyControl();
 			}
 
 			return OperationResult.Success;
@@ -100,29 +105,36 @@ namespace SafeExamBrowser.Client.Operations
 
 		public OperationResult Revert()
 		{
-			logger.Info("Terminating taskbar...");
 			StatusChanged?.Invoke(TextKey.OperationStatus_TerminateTaskbar);
 
-			aboutController.Terminate();
+			if (settings.EnableTaskbar)
-
-			if (settings.AllowApplicationLog)
 			{
-				logController.Terminate();
+				logger.Info("Terminating taskbar...");
+				aboutController.Terminate();
+
+				if (settings.AllowApplicationLog)
+				{
+					logController.Terminate();
+				}
+
+				if (settings.AllowKeyboardLayout)
+				{
+					keyboardLayout.Terminate();
+				}
+
+				if (settings.AllowWirelessNetwork)
+				{
+					wirelessNetwork.Terminate();
+				}
+
+				if (systemInfo.HasBattery)
+				{
+					powerSupply.Terminate();
+				}
 			}
-
+			else
-			if (settings.AllowKeyboardLayout)
 			{
-				keyboardLayout.Terminate();
+				logger.Info("Taskbar was disabled, skipping termination.");
-			}
-
-			if (settings.AllowWirelessNetwork)
-			{
-				wirelessNetwork.Terminate();
-			}
-
-			if (systemInfo.HasBattery)
-			{
-				powerSupply.Terminate();
 			}
 
 			return OperationResult.Success;

SafeExamBrowser.Client/SafeExamBrowser.Client.csproj

@@ -72,6 +72,7 @@
   <ItemGroup>
     <Compile Include="App.cs" />
     <Compile Include="ClientController.cs" />
+    <Compile Include="Operations\ActionCenterOperation.cs" />
     <Compile Include="Operations\ClientHostDisconnectionOperation.cs" />
     <Compile Include="Operations\ConfigurationOperation.cs" />
     <Compile Include="Operations\InitializationOperation.cs" />

SafeExamBrowser.Configuration/ConfigurationData/DataValues.cs

@@ -88,6 +88,8 @@ namespace SafeExamBrowser.Configuration.ConfigurationData
 		{
 			var settings = new Settings();
 
+			settings.ActionCenter.EnableActionCenter = true;
+
 			settings.Browser.StartUrl = "https://www.safeexambrowser.org/start";
 			settings.Browser.AllowConfigurationDownloads = true;
 			settings.Browser.AllowDeveloperConsole = false;
@@ -139,12 +141,12 @@ namespace SafeExamBrowser.Configuration.ConfigurationData
 			settings.Taskbar.AllowApplicationLog = false;
 			settings.Taskbar.AllowKeyboardLayout = true;
 			settings.Taskbar.AllowWirelessNetwork = false;
+			settings.Taskbar.EnableTaskbar = true;
 			settings.Taskbar.ShowClock = true;
 
 			// TODO: Default values for testing of alpha version only, remove for final release!
 			settings.Browser.AllowDeveloperConsole = true;
 			settings.Browser.MainWindowSettings.AllowAddressBar = true;
-			settings.KioskMode = KioskMode.None;
 			settings.Taskbar.AllowApplicationLog = true;
 
 			return settings;

SafeExamBrowser.Contracts/Applications/IApplicationController.cs

@@ -6,7 +6,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 
 namespace SafeExamBrowser.Contracts.Applications
 {

SafeExamBrowser.Contracts/Applications/IApplicationInfo.cs

@@ -11,7 +11,7 @@ using SafeExamBrowser.Contracts.Core;
 namespace SafeExamBrowser.Contracts.Applications
 {
 	/// <summary>
-	/// The information about a (third-party) application which can be accessed via the <see cref="UserInterface.Taskbar.ITaskbar"/>.
+	/// The information about a (third-party) application which can be accessed via the shell.
 	/// </summary>
 	public interface IApplicationInfo
 	{

SafeExamBrowser.Contracts/Applications/IApplicationInstance.cs

@@ -12,7 +12,7 @@ using SafeExamBrowser.Contracts.UserInterface.Windows;
 namespace SafeExamBrowser.Contracts.Applications
 {
 	/// <summary>
-	/// Defines an instance of a (third-party) application which can be accessed via the <see cref="UserInterface.Taskbar.ITaskbar"/>.
+	/// Defines an instance of a (third-party) application which can be accessed via the shell.
 	/// </summary>
 	public interface IApplicationInstance
 	{

SafeExamBrowser.Contracts/Client/INotificationController.cs

@@ -6,7 +6,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 
 namespace SafeExamBrowser.Contracts.Client
 {

SafeExamBrowser.Contracts/Client/INotificationInfo.cs

@@ -11,7 +11,7 @@ using SafeExamBrowser.Contracts.Core;
 namespace SafeExamBrowser.Contracts.Client
 {
 	/// <summary>
-	/// The information about a notification which is part of the <see cref="UserInterface.Taskbar.ITaskbar"/>.
+	/// The information about a notification.
 	/// </summary>
 	public interface INotificationInfo
 	{

SafeExamBrowser.Contracts/Configuration/Settings/ActionCenterSettings.cs

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+using System;
+
+namespace SafeExamBrowser.Contracts.Configuration.Settings
+{
+	/// <summary>
+	/// Defines all configuration options for the <see cref="UserInterface.Shell.IActionCenter"/>.
+	/// </summary>
+	[Serializable]
+	public class ActionCenterSettings
+	{
+		/// <summary>
+		/// Determines whether the action center itself is enabled and visible to the user.
+		/// </summary>
+		public bool EnableActionCenter { get; set; }
+	}
+}

SafeExamBrowser.Contracts/Configuration/Settings/Settings.cs

@@ -17,6 +17,11 @@ namespace SafeExamBrowser.Contracts.Configuration.Settings
 	[Serializable]
 	public class Settings
 	{
+		/// <summary>
+		/// All action center-related settings.
+		/// </summary>
+		public ActionCenterSettings ActionCenter { get; set; }
+
 		/// <summary>
 		/// The hash code of the administrator password for the settings.
 		/// </summary>
@@ -74,6 +79,7 @@ namespace SafeExamBrowser.Contracts.Configuration.Settings
 
 		public Settings()
 		{
+			ActionCenter = new ActionCenterSettings();
 			Browser = new BrowserSettings();
 			Keyboard = new KeyboardSettings();
 			Mouse = new MouseSettings();

SafeExamBrowser.Contracts/Configuration/Settings/TaskbarSettings.cs

@@ -11,7 +11,7 @@ using System;
 namespace SafeExamBrowser.Contracts.Configuration.Settings
 {
 	/// <summary>
-	/// Defines all configuration options for the <see cref="UserInterface.Taskbar.ITaskbar"/>.
+	/// Defines all configuration options for the <see cref="UserInterface.Shell.ITaskbar"/>.
 	/// </summary>
 	[Serializable]
 	public class TaskbarSettings
@@ -31,6 +31,11 @@ namespace SafeExamBrowser.Contracts.Configuration.Settings
 		/// </summary>
 		public bool AllowWirelessNetwork { get; set; }
 
+		/// <summary>
+		/// Determines whether the taskbar itself is enabled and visible to the user.
+		/// </summary>
+		public bool EnableTaskbar { get; set; }
+
 		/// <summary>
 		/// Determines whether the current date and time will be rendered in the taskbar.
 		/// </summary>

SafeExamBrowser.Contracts/SafeExamBrowser.Contracts.csproj

@@ -73,6 +73,7 @@
     <Compile Include="Configuration\DataResources\IResourceLoader.cs" />
     <Compile Include="Configuration\DataResources\IResourceSaver.cs" />
     <Compile Include="Configuration\SaveStatus.cs" />
+    <Compile Include="Configuration\Settings\ActionCenterSettings.cs" />
     <Compile Include="Configuration\Settings\BrowserWindowSettings.cs" />
     <Compile Include="Configuration\Settings\UserInterfaceMode.cs" />
     <Compile Include="Applications\Events\IconChangedEventHandler.cs" />
@@ -186,26 +187,29 @@
     <Compile Include="UserInterface\Browser\IBrowserWindow.cs" />
     <Compile Include="UserInterface\MessageBox\IMessageBox.cs" />
     <Compile Include="UserInterface\IProgressIndicator.cs" />
-    <Compile Include="UserInterface\Taskbar\Events\ApplicationButtonClickedEventHandler.cs" />
+    <Compile Include="UserInterface\Shell\Events\ActivatorEventHandler.cs" />
-    <Compile Include="UserInterface\Taskbar\Events\KeyboardLayoutSelectedEventHandler.cs" />
+    <Compile Include="UserInterface\Shell\Events\ApplicationButtonClickedEventHandler.cs" />
-    <Compile Include="UserInterface\Taskbar\Events\NotificationButtonClickedEventHandler.cs" />
+    <Compile Include="UserInterface\Shell\Events\KeyboardLayoutSelectedEventHandler.cs" />
-    <Compile Include="UserInterface\Taskbar\Events\WindowClosingEventHandler.cs" />
+    <Compile Include="UserInterface\Shell\Events\NotificationButtonClickedEventHandler.cs" />
-    <Compile Include="UserInterface\Taskbar\Events\WirelessNetworkSelectedEventHandler.cs" />
+    <Compile Include="UserInterface\Shell\IActionCenter.cs" />
-    <Compile Include="UserInterface\Taskbar\Events\QuitButtonClickedEventHandler.cs" />
+    <Compile Include="UserInterface\Shell\IActionCenterActivator.cs" />
+    <Compile Include="UserInterface\Windows\Events\WindowClosingEventHandler.cs" />
+    <Compile Include="UserInterface\Shell\Events\WirelessNetworkSelectedEventHandler.cs" />
+    <Compile Include="UserInterface\Shell\Events\QuitButtonClickedEventHandler.cs" />
     <Compile Include="UserInterface\Windows\IPasswordDialog.cs" />
     <Compile Include="UserInterface\Windows\IPasswordDialogResult.cs" />
     <Compile Include="UserInterface\Windows\IRuntimeWindow.cs" />
     <Compile Include="UserInterface\MessageBox\MessageBoxResult.cs" />
-    <Compile Include="UserInterface\Taskbar\INotificationButton.cs" />
+    <Compile Include="UserInterface\Shell\INotificationButton.cs" />
     <Compile Include="UserInterface\Windows\ISplashScreen.cs" />
-    <Compile Include="UserInterface\Taskbar\ISystemKeyboardLayoutControl.cs" />
+    <Compile Include="UserInterface\Shell\ISystemKeyboardLayoutControl.cs" />
-    <Compile Include="UserInterface\Taskbar\ISystemPowerSupplyControl.cs" />
+    <Compile Include="UserInterface\Shell\ISystemPowerSupplyControl.cs" />
-    <Compile Include="UserInterface\Taskbar\ISystemControl.cs" />
+    <Compile Include="UserInterface\Shell\ISystemControl.cs" />
-    <Compile Include="UserInterface\Taskbar\ISystemWirelessNetworkControl.cs" />
+    <Compile Include="UserInterface\Shell\ISystemWirelessNetworkControl.cs" />
-    <Compile Include="UserInterface\Taskbar\ITaskbar.cs" />
+    <Compile Include="UserInterface\Shell\ITaskbar.cs" />
     <Compile Include="I18n\ITextResource.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
-    <Compile Include="UserInterface\Taskbar\IApplicationButton.cs" />
+    <Compile Include="UserInterface\Shell\IApplicationButton.cs" />
     <Compile Include="UserInterface\IUserInterfaceFactory.cs" />
     <Compile Include="UserInterface\Windows\IWindow.cs" />
     <Compile Include="UserInterface\MessageBox\MessageBoxAction.cs" />

SafeExamBrowser.Contracts/SystemComponents/ISystemComponent.cs

@@ -6,7 +6,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 
 namespace SafeExamBrowser.Contracts.SystemComponents
 {

SafeExamBrowser.Contracts/UserInterface/IUserInterfaceFactory.cs

@@ -13,7 +13,7 @@ using SafeExamBrowser.Contracts.Configuration.Settings;
 using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.UserInterface.Browser;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 using SafeExamBrowser.Contracts.UserInterface.Windows;
 
 namespace SafeExamBrowser.Contracts.UserInterface

SafeExamBrowser.Contracts/UserInterface/Shell/Events/ActivatorEventHandler.cs

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+namespace SafeExamBrowser.Contracts.UserInterface.Shell.Events
+{
+	/// <summary>
+	/// Event handler fired by an <see cref="IActionCenterActivator"/> to control the visibility of the <see cref="IActionCenter"/>.
+	/// </summary>
+	public delegate void ActivatorEventHandler();
+}

SafeExamBrowser.Contracts/UserInterface/Shell/Events/ApplicationButtonClickedEventHandler.cs

@@ -8,7 +8,7 @@
 
 using SafeExamBrowser.Contracts.Applications;
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar.Events
+namespace SafeExamBrowser.Contracts.UserInterface.Shell.Events
 {
 	/// <summary>
 	/// Indicates that an <see cref="IApplicationButton"/> has been clicked, optionally specifying the ID of the selected instance (if

SafeExamBrowser.Contracts/UserInterface/Shell/Events/KeyboardLayoutSelectedEventHandler.cs

@@ -8,7 +8,7 @@
 
 using SafeExamBrowser.Contracts.SystemComponents;
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar.Events
+namespace SafeExamBrowser.Contracts.UserInterface.Shell.Events
 {
 	/// <summary>
 	/// Indicates that a particular <see cref="IKeyboardLayout"/> has been selected by the user.

SafeExamBrowser.Contracts/UserInterface/Shell/Events/NotificationButtonClickedEventHandler.cs

@@ -6,7 +6,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar.Events
+namespace SafeExamBrowser.Contracts.UserInterface.Shell.Events
 {
 	/// <summary>
 	/// Indicates that the user clicked on a <see cref="INotificationButton"/> in the <see cref="ITaskbar"/>.

SafeExamBrowser.Contracts/UserInterface/Shell/Events/QuitButtonClickedEventHandler.cs

@@ -8,7 +8,7 @@
 
 using System.ComponentModel;
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar.Events
+namespace SafeExamBrowser.Contracts.UserInterface.Shell.Events
 {
 	/// <summary>
 	/// Event handler used to define the control flow when the <see cref="ITaskbar"/>'s quit button is clicked.

SafeExamBrowser.Contracts/UserInterface/Shell/Events/WirelessNetworkSelectedEventHandler.cs

@@ -8,7 +8,7 @@
 
 using SafeExamBrowser.Contracts.SystemComponents;
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar.Events
+namespace SafeExamBrowser.Contracts.UserInterface.Shell.Events
 {
 	/// <summary>
 	/// Indicates that a particular <see cref="IWirelessNetwork"/> has been selected by the user.

SafeExamBrowser.Contracts/UserInterface/Shell/IActionCenter.cs

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+namespace SafeExamBrowser.Contracts.UserInterface.Shell
+{
+	/// <summary>
+	/// The action center is a user interface element via which the user can access and control various aspects of the application.
+	/// </summary>
+	public interface IActionCenter
+	{
+		/// <summary>
+		/// Closes the action center.
+		/// </summary>
+		void Close();
+
+		/// <summary>
+		/// Makes the action center invisible.
+		/// </summary>
+		void Hide();
+
+		/// <summary>
+		/// Registers the specified activator to control the visibility of the action center.
+		/// </summary>
+		void Register(IActionCenterActivator activator);
+
+		/// <summary>
+		/// Makes the action center visible.
+		/// </summary>
+		void Show();
+	}
+}

SafeExamBrowser.Contracts/UserInterface/Shell/IActionCenterActivator.cs

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
+
+namespace SafeExamBrowser.Contracts.UserInterface.Shell
+{
+	/// <summary>
+	/// A module which can be used to control the visibility of the <see cref="IActionCenter"/>.
+	/// </summary>
+	public interface IActionCenterActivator
+	{
+		/// <summary>
+		/// Fired when the action center should be made visible.
+		/// </summary>
+		event ActivatorEventHandler Activate;
+
+		/// <summary>
+		/// Fired when the action center should be made invisible.
+		/// </summary>
+		event ActivatorEventHandler Deactivate;
+
+		/// <summary>
+		/// Fired when the action center visibility should be toggled.
+		/// </summary>
+		event ActivatorEventHandler Toggle;
+
+		/// <summary>
+		/// Starts monitoring user input events.
+		/// </summary>
+		void Start();
+
+		/// <summary>
+		/// Stops monitoring user input events.
+		/// </summary>
+		void Stop();
+	}
+}

SafeExamBrowser.Contracts/UserInterface/Shell/IApplicationButton.cs

@@ -7,9 +7,9 @@
  */
 
 using SafeExamBrowser.Contracts.Applications;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar
+namespace SafeExamBrowser.Contracts.UserInterface.Shell
 {
 	/// <summary>
 	/// The button of a (third-party) application which can be loaded into the <see cref="ITaskbar"/>.

SafeExamBrowser.Contracts/UserInterface/Shell/INotificationButton.cs

@@ -6,9 +6,9 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar
+namespace SafeExamBrowser.Contracts.UserInterface.Shell
 {
 	/// <summary>
 	/// The button of a notification which can be loaded into the <see cref="ITaskbar"/>.

SafeExamBrowser.Contracts/UserInterface/Shell/ISystemControl.cs

@@ -6,7 +6,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar
+namespace SafeExamBrowser.Contracts.UserInterface.Shell
 {
 	/// <summary>
 	/// The control of a system component which can be loaded into the <see cref="ITaskbar"/>.

SafeExamBrowser.Contracts/UserInterface/Shell/ISystemKeyboardLayoutControl.cs

@@ -7,9 +7,9 @@
  */
 
 using SafeExamBrowser.Contracts.SystemComponents;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar
+namespace SafeExamBrowser.Contracts.UserInterface.Shell
 {
 	/// <summary>
 	/// The control of the keyboard layout system component.

SafeExamBrowser.Contracts/UserInterface/Shell/ISystemPowerSupplyControl.cs

@@ -8,7 +8,7 @@
 
 using SafeExamBrowser.Contracts.SystemComponents;
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar
+namespace SafeExamBrowser.Contracts.UserInterface.Shell
 {
 	/// <summary>
 	/// The control of the power supply system component.

SafeExamBrowser.Contracts/UserInterface/Shell/ISystemWirelessNetworkControl.cs

@@ -8,9 +8,9 @@
 
 using System.Collections.Generic;
 using SafeExamBrowser.Contracts.SystemComponents;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar
+namespace SafeExamBrowser.Contracts.UserInterface.Shell
 {
 	/// <summary>
 	/// The control of the wireless network system component.

SafeExamBrowser.Contracts/UserInterface/Shell/ITaskbar.cs

@@ -6,13 +6,12 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar
+namespace SafeExamBrowser.Contracts.UserInterface.Shell
 {
 	/// <summary>
-	/// Defines the functionality of the application taskbar. The taskbar is the main user interface element via which the user can access
+	/// The taskbar is a user interface element via which the user can access and control various aspects of the application.
-	/// the browser, third-party applications, system controls and so on.
 	/// </summary>
 	public interface ITaskbar
 	{
@@ -55,5 +54,10 @@ namespace SafeExamBrowser.Contracts.UserInterface.Taskbar
 		/// Moves the taskbar to the bottom of and resizes it according to the current working area.
 		/// </summary>
 		void InitializeBounds();
+
+		/// <summary>
+		/// Shows the taskbar.
+		/// </summary>
+		void Show();
 	}
 }

SafeExamBrowser.Contracts/UserInterface/Windows/Events/WindowClosingEventHandler.cs

@@ -6,7 +6,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-namespace SafeExamBrowser.Contracts.UserInterface.Taskbar.Events
+namespace SafeExamBrowser.Contracts.UserInterface.Windows.Events
 {
 	/// <summary>
 	/// Indicates that a window is about to be closed.

SafeExamBrowser.Contracts/UserInterface/Windows/IWindow.cs

@@ -6,7 +6,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Windows.Events;
 
 namespace SafeExamBrowser.Contracts.UserInterface.Windows
 {

SafeExamBrowser.Runtime/CompositionRoot.cs

@@ -89,7 +89,18 @@ namespace SafeExamBrowser.Runtime
 			var bootstrapSequence = new OperationSequence(logger, bootstrapOperations);
 			var sessionSequence = new RepeatableOperationSequence(logger, sessionOperations);
 
-			RuntimeController = new RuntimeController(appConfig, logger, messageBox, bootstrapSequence, sessionSequence, runtimeHost, serviceProxy, sessionContext, shutdown, text, uiFactory);
+			RuntimeController = new RuntimeController(
+				appConfig,
+				logger,
+				messageBox,
+				bootstrapSequence,
+				sessionSequence,
+				runtimeHost,
+				serviceProxy,
+				sessionContext,
+				shutdown,
+				text,
+				uiFactory);
 		}
 
 		internal void LogStartupInformation()
@@ -126,11 +137,30 @@ namespace SafeExamBrowser.Runtime
 			var xmlParser = new XmlParser(ModuleLogger(nameof(XmlParser)));
 			var xmlSerializer = new XmlSerializer(ModuleLogger(nameof(XmlSerializer)));
 
-			configuration = new ConfigurationRepository(certificateStore, new HashAlgorithm(), repositoryLogger, executable.Location, programCopyright, programTitle, programVersion);
+			configuration = new ConfigurationRepository(
+				certificateStore,
+				new HashAlgorithm(),
+				repositoryLogger,
+				executable.Location,
+				programCopyright,
+				programTitle,
+				programVersion);
 			appConfig = configuration.InitializeAppConfig();
 
-			configuration.Register(new BinaryParser(compressor, new HashAlgorithm(), ModuleLogger(nameof(BinaryParser)), passwordEncryption, publicKeyEncryption, symmetricEncryption, xmlParser));
+			configuration.Register(new BinaryParser(
-			configuration.Register(new BinarySerializer(compressor, ModuleLogger(nameof(BinarySerializer)), passwordEncryption, publicKeyEncryption, symmetricEncryption, xmlSerializer));
+				compressor,
+				new HashAlgorithm(),
+				ModuleLogger(nameof(BinaryParser)),
+				passwordEncryption,
+				publicKeyEncryption,
+				symmetricEncryption, xmlParser));
+			configuration.Register(new BinarySerializer(
+				compressor,
+				ModuleLogger(nameof(BinarySerializer)),
+				passwordEncryption,
+				publicKeyEncryption,
+				symmetricEncryption,
+				xmlSerializer));
 			configuration.Register(new XmlParser(ModuleLogger(nameof(XmlParser))));
 			configuration.Register(new XmlSerializer(ModuleLogger(nameof(XmlSerializer))));
 			configuration.Register(new FileResourceLoader(ModuleLogger(nameof(FileResourceLoader))));

SafeExamBrowser.SystemComponents/KeyboardLayout.cs

@@ -12,7 +12,7 @@ using System.Windows.Forms;
 using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.SystemComponents;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 
 namespace SafeExamBrowser.SystemComponents
 {

SafeExamBrowser.SystemComponents/PowerSupply.cs

@@ -11,7 +11,7 @@ using System.Timers;
 using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.SystemComponents;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 using PowerLineStatus = System.Windows.Forms.PowerLineStatus;
 using SystemInformation = System.Windows.Forms.SystemInformation;
 

SafeExamBrowser.SystemComponents/WirelessNetwork.cs

@@ -13,7 +13,7 @@ using System.Timers;
 using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.SystemComponents;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 using SimpleWifi;
 using SimpleWifi.Win32;
 using SimpleWifi.Win32.Interop;

SafeExamBrowser.UserInterface.Desktop/AboutWindow.xaml.cs

@@ -10,8 +10,8 @@ using System.Windows;
 using System.Windows.Documents;
 using SafeExamBrowser.Contracts.Configuration;
 using SafeExamBrowser.Contracts.I18n;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
 using SafeExamBrowser.Contracts.UserInterface.Windows;
+using SafeExamBrowser.Contracts.UserInterface.Windows.Events;
 
 namespace SafeExamBrowser.UserInterface.Desktop
 {

SafeExamBrowser.UserInterface.Desktop/ActionCenter.xaml

@@ -0,0 +1,12 @@
+<Window x:Class="SafeExamBrowser.UserInterface.Desktop.ActionCenter"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:SafeExamBrowser.UserInterface.Desktop"
+        mc:Ignorable="d" Title="ActionCenter" Height="1000" Width="400" Background="#EEF0F0F0" AllowsTransparency="True" WindowStyle="None"
+        Topmost="True" ResizeMode="NoResize">
+    <Grid>
+        
+    </Grid>
+</Window>

SafeExamBrowser.UserInterface.Desktop/ActionCenter.xaml.cs

@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+using System;
+using System.Windows;
+using System.Windows.Media.Animation;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
+
+namespace SafeExamBrowser.UserInterface.Desktop
+{
+	public partial class ActionCenter : Window, IActionCenter
+	{
+		public ActionCenter()
+		{
+			InitializeComponent();
+			RegisterEvents();
+		}
+
+		public new void Close()
+		{
+			Dispatcher.Invoke(base.Close);
+		}
+
+		public new void Hide()
+		{
+			Dispatcher.Invoke(HideAnimated);
+		}
+
+		public void Register(IActionCenterActivator activator)
+		{
+			activator.Activate += Activator_Activate;
+			activator.Deactivate += Activator_Deactivate;
+			activator.Toggle += Activator_Toggle;
+		}
+
+		public new void Show()
+		{
+			Dispatcher.Invoke(ShowAnimated);
+		}
+
+		private void HideAnimated()
+		{
+			var storyboard = new Storyboard();
+			var animation = new DoubleAnimation
+			{
+				EasingFunction = new CircleEase { EasingMode = EasingMode.EaseOut },
+				From = 0,
+				To = -Width,
+				Duration = new Duration(TimeSpan.FromMilliseconds(500))
+			};
+
+			Storyboard.SetTarget(animation, this);
+			Storyboard.SetTargetProperty(animation, new PropertyPath(LeftProperty));
+
+			storyboard.Children.Add(animation);
+			storyboard.Completed += (o, args) => Dispatcher.Invoke(base.Hide);
+			storyboard.Begin();
+		}
+
+		private void ShowAnimated()
+		{
+			var storyboard = new Storyboard();
+			var animation = new DoubleAnimation
+			{
+				EasingFunction = new CircleEase { EasingMode = EasingMode.EaseOut },
+				From = -Width,
+				To = 0,
+				Duration = new Duration(TimeSpan.FromMilliseconds(500))
+			};
+
+			Storyboard.SetTarget(animation, this);
+			Storyboard.SetTargetProperty(animation, new PropertyPath(LeftProperty));
+
+			InitializeBounds();
+			base.Show();
+			Activate();
+
+			storyboard.Children.Add(animation);
+			storyboard.Completed += (o, args) => Dispatcher.Invoke(Activate);
+			storyboard.Begin();
+		}
+
+		private void InitializeBounds()
+		{
+			Height = SystemParameters.WorkArea.Height;
+			Top = 0;
+			Left = -Width;
+		}
+
+		private void RegisterEvents()
+		{
+			Deactivated += (o, args) => HideAnimated();
+		}
+
+		private void Activator_Activate()
+		{
+			Dispatcher.InvokeAsync(() =>
+			{
+				if (Visibility != Visibility.Visible)
+				{
+					ShowAnimated();
+				}
+			});
+		}
+
+		private void Activator_Deactivate()
+		{
+			Dispatcher.InvokeAsync(() =>
+			{
+				if (Visibility == Visibility.Visible)
+				{
+					HideAnimated();
+				}
+			});
+		}
+
+		private void Activator_Toggle()
+		{
+			Dispatcher.InvokeAsync(() =>
+			{
+				if (Visibility != Visibility.Visible)
+				{
+					ShowAnimated();
+				}
+				else
+				{
+					HideAnimated();
+				}
+			});
+		}
+	}
+}

SafeExamBrowser.UserInterface.Desktop/BrowserWindow.xaml.cs

@@ -18,8 +18,8 @@ using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.UserInterface;
 using SafeExamBrowser.Contracts.UserInterface.Browser;
 using SafeExamBrowser.Contracts.UserInterface.Browser.Events;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
 using SafeExamBrowser.Contracts.UserInterface.Windows;
+using SafeExamBrowser.Contracts.UserInterface.Windows.Events;
 using SafeExamBrowser.UserInterface.Desktop.Utilities;
 
 namespace SafeExamBrowser.UserInterface.Desktop
@@ -117,33 +117,12 @@ namespace SafeExamBrowser.UserInterface.Desktop
 
 		private void InitializeBrowserWindow(IBrowserControl browserControl)
 		{
-			var originalBrush = MenuButton.Background;
-
 			if (browserControl is System.Windows.Forms.Control control)
 			{
 				BrowserControlHost.Child = control;
 			}
 
-			BackwardButton.Click += (o, args) => BackwardNavigationRequested?.Invoke();
+			RegisterEvents();
-			Closing += (o, args) => closing?.Invoke();
-			ForwardButton.Click += (o, args) => ForwardNavigationRequested?.Invoke();
-			MenuButton.Click += (o, args) => MenuPopup.IsOpen = !MenuPopup.IsOpen;
-			MenuButton.MouseLeave += (o, args) => Task.Delay(250).ContinueWith(_ => Dispatcher.Invoke(() => MenuPopup.IsOpen = MenuPopup.IsMouseOver));
-			MenuPopup.Closed += (o, args) => { MenuButton.Background = originalBrush; };
-			MenuPopup.MouseLeave += (o, args) => Task.Delay(250).ContinueWith(_ => Dispatcher.Invoke(() => MenuPopup.IsOpen = IsMouseOver));
-			MenuPopup.Opened += (o, args) => { MenuButton.Background = Brushes.LightGray; };
-			KeyUp += BrowserWindow_KeyUp;
-			ReloadButton.Click += (o, args) => ReloadRequested?.Invoke();
-			UrlTextBox.GotKeyboardFocus += (o, args) => UrlTextBox.SelectAll();
-			UrlTextBox.GotMouseCapture += UrlTextBox_GotMouseCapture;
-			UrlTextBox.LostKeyboardFocus += (o, args) => UrlTextBox.Tag = null;
-			UrlTextBox.LostFocus += (o, args) => UrlTextBox.Tag = null;
-			UrlTextBox.KeyUp += UrlTextBox_KeyUp;
-			UrlTextBox.MouseDoubleClick += (o, args) => UrlTextBox.SelectAll();
-			ZoomInButton.Click += (o, args) => ZoomInRequested?.Invoke();
-			ZoomOutButton.Click += (o, args) => ZoomOutRequested?.Invoke();
-			ZoomResetButton.Click += (o, args) => ZoomResetRequested?.Invoke();
-
 			ApplySettings();
 			LoadIcons();
 			LoadText();
@@ -174,6 +153,31 @@ namespace SafeExamBrowser.UserInterface.Desktop
 			}
 		}
 
+		private void RegisterEvents()
+		{
+			var originalBrush = MenuButton.Background;
+
+			BackwardButton.Click += (o, args) => BackwardNavigationRequested?.Invoke();
+			Closing += (o, args) => closing?.Invoke();
+			ForwardButton.Click += (o, args) => ForwardNavigationRequested?.Invoke();
+			MenuButton.Click += (o, args) => MenuPopup.IsOpen = !MenuPopup.IsOpen;
+			MenuButton.MouseLeave += (o, args) => Task.Delay(250).ContinueWith(_ => Dispatcher.Invoke(() => MenuPopup.IsOpen = MenuPopup.IsMouseOver));
+			MenuPopup.Closed += (o, args) => { MenuButton.Background = originalBrush; };
+			MenuPopup.MouseLeave += (o, args) => Task.Delay(250).ContinueWith(_ => Dispatcher.Invoke(() => MenuPopup.IsOpen = IsMouseOver));
+			MenuPopup.Opened += (o, args) => { MenuButton.Background = Brushes.LightGray; };
+			KeyUp += BrowserWindow_KeyUp;
+			ReloadButton.Click += (o, args) => ReloadRequested?.Invoke();
+			UrlTextBox.GotKeyboardFocus += (o, args) => UrlTextBox.SelectAll();
+			UrlTextBox.GotMouseCapture += UrlTextBox_GotMouseCapture;
+			UrlTextBox.LostKeyboardFocus += (o, args) => UrlTextBox.Tag = null;
+			UrlTextBox.LostFocus += (o, args) => UrlTextBox.Tag = null;
+			UrlTextBox.KeyUp += UrlTextBox_KeyUp;
+			UrlTextBox.MouseDoubleClick += (o, args) => UrlTextBox.SelectAll();
+			ZoomInButton.Click += (o, args) => ZoomInRequested?.Invoke();
+			ZoomOutButton.Click += (o, args) => ZoomOutRequested?.Invoke();
+			ZoomResetButton.Click += (o, args) => ZoomResetRequested?.Invoke();
+		}
+
 		private void ApplySettings()
 		{
 			if (isMainWindow)

SafeExamBrowser.UserInterface.Desktop/Controls/ApplicationButton.xaml.cs

@@ -14,8 +14,8 @@ using System.Windows.Controls;
 using System.Windows.Media;
 using System.Windows.Threading;
 using SafeExamBrowser.Contracts.Applications;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 using SafeExamBrowser.UserInterface.Desktop.Utilities;
 
 namespace SafeExamBrowser.UserInterface.Desktop.Controls

SafeExamBrowser.UserInterface.Desktop/Controls/ApplicationInstanceButton.xaml.cs

@@ -10,7 +10,7 @@ using System.Windows;
 using System.Windows.Controls;
 using SafeExamBrowser.Contracts.Applications;
 using SafeExamBrowser.Contracts.Core;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 using SafeExamBrowser.UserInterface.Desktop.Utilities;
 
 namespace SafeExamBrowser.UserInterface.Desktop.Controls

SafeExamBrowser.UserInterface.Desktop/Controls/KeyboardLayoutControl.xaml.cs

@@ -12,8 +12,8 @@ using System.Threading.Tasks;
 using System.Windows.Controls;
 using System.Windows.Media;
 using SafeExamBrowser.Contracts.SystemComponents;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 
 namespace SafeExamBrowser.UserInterface.Desktop.Controls
 {

SafeExamBrowser.UserInterface.Desktop/Controls/NotificationButton.xaml.cs

@@ -9,8 +9,8 @@
 using System.Windows;
 using System.Windows.Controls;
 using SafeExamBrowser.Contracts.Client;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 using SafeExamBrowser.UserInterface.Desktop.Utilities;
 
 namespace SafeExamBrowser.UserInterface.Desktop.Controls

SafeExamBrowser.UserInterface.Desktop/Controls/PowerSupplyControl.xaml.cs

@@ -11,7 +11,7 @@ using System.Windows.Controls;
 using System.Windows.Media;
 using System.Windows.Threading;
 using SafeExamBrowser.Contracts.SystemComponents;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 
 namespace SafeExamBrowser.UserInterface.Desktop.Controls
 {

SafeExamBrowser.UserInterface.Desktop/Controls/QuitButton.xaml.cs

@@ -10,7 +10,7 @@ using System;
 using System.ComponentModel;
 using System.Windows;
 using System.Windows.Controls;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 using SafeExamBrowser.UserInterface.Desktop.Utilities;
 
 namespace SafeExamBrowser.UserInterface.Desktop.Controls

SafeExamBrowser.UserInterface.Desktop/Controls/WirelessNetworkControl.xaml.cs

@@ -14,8 +14,8 @@ using System.Windows.Controls;
 using System.Windows.Media;
 using FontAwesome.WPF;
 using SafeExamBrowser.Contracts.SystemComponents;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 using SafeExamBrowser.UserInterface.Desktop.Utilities;
 
 namespace SafeExamBrowser.UserInterface.Desktop.Controls

SafeExamBrowser.UserInterface.Desktop/LogWindow.xaml.cs

@@ -10,8 +10,8 @@ using System.ComponentModel;
 using System.Windows;
 using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
 using SafeExamBrowser.Contracts.UserInterface.Windows;
+using SafeExamBrowser.Contracts.UserInterface.Windows.Events;
 using SafeExamBrowser.UserInterface.Desktop.ViewModels;
 
 namespace SafeExamBrowser.UserInterface.Desktop

SafeExamBrowser.UserInterface.Desktop/PasswordDialog.xaml.cs

@@ -9,8 +9,8 @@
 using System.Windows;
 using System.Windows.Input;
 using SafeExamBrowser.Contracts.I18n;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
 using SafeExamBrowser.Contracts.UserInterface.Windows;
+using SafeExamBrowser.Contracts.UserInterface.Windows.Events;
 
 namespace SafeExamBrowser.UserInterface.Desktop
 {

SafeExamBrowser.UserInterface.Desktop/RuntimeWindow.xaml.cs

@@ -11,8 +11,8 @@ using System.Windows.Documents;
 using SafeExamBrowser.Contracts.Configuration;
 using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
 using SafeExamBrowser.Contracts.UserInterface.Windows;
+using SafeExamBrowser.Contracts.UserInterface.Windows.Events;
 using SafeExamBrowser.UserInterface.Desktop.ViewModels;
 
 namespace SafeExamBrowser.UserInterface.Desktop

SafeExamBrowser.UserInterface.Desktop/SafeExamBrowser.UserInterface.Desktop.csproj

@@ -68,6 +68,9 @@
     <Compile Include="AboutWindow.xaml.cs">
       <DependentUpon>AboutWindow.xaml</DependentUpon>
     </Compile>
+    <Compile Include="ActionCenter.xaml.cs">
+      <DependentUpon>ActionCenter.xaml</DependentUpon>
+    </Compile>
     <Compile Include="BrowserWindow.xaml.cs">
       <DependentUpon>BrowserWindow.xaml</DependentUpon>
     </Compile>
@@ -126,6 +129,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="ActionCenter.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="BrowserWindow.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>

SafeExamBrowser.UserInterface.Desktop/SplashScreen.xaml.cs

@@ -10,8 +10,8 @@ using System.Windows;
 using System.Windows.Documents;
 using SafeExamBrowser.Contracts.Configuration;
 using SafeExamBrowser.Contracts.I18n;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
 using SafeExamBrowser.Contracts.UserInterface.Windows;
+using SafeExamBrowser.Contracts.UserInterface.Windows.Events;
 using SafeExamBrowser.UserInterface.Desktop.ViewModels;
 
 namespace SafeExamBrowser.UserInterface.Desktop

SafeExamBrowser.UserInterface.Desktop/Taskbar.xaml

@@ -5,9 +5,7 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:SafeExamBrowser.UserInterface.Desktop.Controls"
         xmlns:s="clr-namespace:System;assembly=mscorlib"
-        mc:Ignorable="d"
+        mc:Ignorable="d" Title="Taskbar" Background="#FFF0F0F0" Height="40" Width="750" WindowStyle="None" Topmost="True" ResizeMode="NoResize" Icon="./Images/SafeExamBrowser.ico">
-        Title="Taskbar" Background="#FFF0F0F0" Height="40" Width="750" WindowStyle="None" Topmost="True" Visibility="Visible"
-        ResizeMode="NoResize" Icon="./Images/SafeExamBrowser.ico">
     <Window.Resources>
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>

SafeExamBrowser.UserInterface.Desktop/Taskbar.xaml.cs

@@ -9,8 +9,8 @@
 using System.ComponentModel;
 using System.Windows;
 using SafeExamBrowser.Contracts.Logging;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar.Events;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
 using SafeExamBrowser.UserInterface.Desktop.Utilities;
 
 namespace SafeExamBrowser.UserInterface.Desktop
@@ -94,6 +94,11 @@ namespace SafeExamBrowser.UserInterface.Desktop
 			});
 		}
 
+		public new void Show()
+		{
+			Dispatcher.Invoke(base.Show);
+		}
+
 		private void QuitButton_Clicked(CancelEventArgs args)
 		{
 			QuitButtonClicked?.Invoke(args);

SafeExamBrowser.UserInterface.Desktop/UserInterfaceFactory.cs

@@ -18,7 +18,7 @@ using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.UserInterface;
 using SafeExamBrowser.Contracts.UserInterface.Browser;
-using SafeExamBrowser.Contracts.UserInterface.Taskbar;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
 using SafeExamBrowser.Contracts.UserInterface.Windows;
 using SafeExamBrowser.UserInterface.Desktop.Controls;
 

SafeExamBrowser.WindowsApi/Constants/AccessMask.cs

@@ -14,7 +14,7 @@ namespace SafeExamBrowser.WindowsApi.Constants
 	/// See https://docs.microsoft.com/de-de/windows/desktop/SecAuthZ/access-mask
 	/// </remarks>
 	[Flags]
-	internal enum ACCESS_MASK : uint
+	internal enum AccessMask : uint
 	{
 		DESKTOP_NONE = 0,
 		DESKTOP_READOBJECTS = 0x0001,

SafeExamBrowser.WindowsApi/Constants/Constant.cs

@@ -32,6 +32,20 @@ namespace SafeExamBrowser.WindowsApi.Constants
 		/// </summary>
 		internal const int MIN_ALL = 419;
 
+		/// <summary>
+		/// Bitmask to evaluate the origin of a mouse event.
+		/// 
+		/// See https://docs.microsoft.com/en-us/windows/desktop/tablet/system-events-and-mouse-messages.
+		/// </summary>
+		internal const uint MOUSEEVENTF_MASK = 0xFFFFFF00;
+
+		/// <summary>
+		/// The constant for a mouse event generated by a touch interface.
+		/// 
+		/// See https://docs.microsoft.com/en-us/windows/desktop/tablet/system-events-and-mouse-messages.
+		/// </summary>
+		internal const uint MOUSEEVENTF_FROMTOUCH = 0xFF515700;
+
 		/// <summary>
 		/// Specifies the default priority class for processes, i.e. a process with no special scheduling needs.
 		/// 

SafeExamBrowser.WindowsApi/Constants/VirtualKeyCode.cs

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+namespace SafeExamBrowser.WindowsApi.Constants
+{
+	/// <remarks>
+	/// See https://docs.microsoft.com/en-us/windows/desktop/inputdev/virtual-key-codes.
+	/// </remarks>
+	internal enum VirtualKeyCode
+	{
+		A = 0x41,
+		Delete = 0x2E,
+		LeftAlt = 0xA4,
+		LeftControl = 0xA2,
+		LeftWindows = 0x5B,
+		RightAlt = 0xA5,
+		RightControl = 0xA3
+	}
+}

SafeExamBrowser.WindowsApi/Delegates/HookDelegate.cs

@@ -13,5 +13,5 @@ namespace SafeExamBrowser.WindowsApi.Delegates
 	/// <remarks>
 	/// See https://docs.microsoft.com/de-de/windows/desktop/api/winuser/nc-winuser-hookproc
 	/// </remarks>
-	internal delegate IntPtr HookDelegate(int code, IntPtr wParam, IntPtr lParam);
+	internal delegate IntPtr HookDelegate(int nCode, IntPtr wParam, IntPtr lParam);
 }

SafeExamBrowser.WindowsApi/DesktopFactory.cs

@@ -28,7 +28,7 @@ namespace SafeExamBrowser.WindowsApi
 		{
 			logger.Debug($"Attempting to create new desktop '{name}'...");
 
-			var handle = User32.CreateDesktop(name, IntPtr.Zero, IntPtr.Zero, 0, (uint) ACCESS_MASK.GENERIC_ALL, IntPtr.Zero);
+			var handle = User32.CreateDesktop(name, IntPtr.Zero, IntPtr.Zero, 0, (uint) AccessMask.GENERIC_ALL, IntPtr.Zero);
 
 			if (handle == IntPtr.Zero)
 			{

SafeExamBrowser.WindowsApi/KeyboardActivator.cs

@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+using System;
+using System.Runtime.InteropServices;
+using System.Threading;
+using SafeExamBrowser.Contracts.Logging;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
+using SafeExamBrowser.WindowsApi.Constants;
+using SafeExamBrowser.WindowsApi.Delegates;
+using SafeExamBrowser.WindowsApi.Types;
+
+namespace SafeExamBrowser.WindowsApi
+{
+	public class KeyboardActivator : IActionCenterActivator
+	{
+		private bool A, LeftWindows;
+		private IntPtr handle;
+		private HookDelegate hookDelegate;
+		private ILogger logger;
+
+		public event ActivatorEventHandler Activate { add { } remove { } }
+		public event ActivatorEventHandler Deactivate { add { } remove { } }
+		public event ActivatorEventHandler Toggle;
+
+		public KeyboardActivator(ILogger logger)
+		{
+			this.logger = logger;
+		}
+
+		public void Start()
+		{
+			var hookReadyEvent = new AutoResetEvent(false);
+			var hookThread = new Thread(() =>
+			{
+				var sleepEvent = new AutoResetEvent(false);
+				var process = System.Diagnostics.Process.GetCurrentProcess();
+				var module = process.MainModule;
+				var moduleHandle = Kernel32.GetModuleHandle(module.ModuleName);
+
+				// IMPORTANT:
+				// Ensures that the hook delegate does not get garbage collected prematurely, as it will be passed to unmanaged code.
+				// Not doing so will result in a <c>CallbackOnCollectedDelegate</c> error and subsequent application crash!
+				hookDelegate = new HookDelegate(LowLevelKeyboardProc);
+
+				handle = User32.SetWindowsHookEx(HookType.WH_KEYBOARD_LL, hookDelegate, moduleHandle, 0);
+				hookReadyEvent.Set();
+
+				while (true)
+				{
+					sleepEvent.WaitOne();
+				}
+			});
+
+			hookThread.SetApartmentState(ApartmentState.STA);
+			hookThread.IsBackground = true;
+			hookThread.Start();
+
+			hookReadyEvent.WaitOne();
+		}
+
+		public void Stop()
+		{
+			User32.UnhookWindowsHookEx(handle);
+		}
+
+		private IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam)
+		{
+			if (nCode >= 0)
+			{
+				var changed = false;
+				var keyData = (KBDLLHOOKSTRUCT) Marshal.PtrToStructure(lParam, typeof(KBDLLHOOKSTRUCT));
+				var pressed = IsPressed(wParam.ToInt32());
+
+				switch (keyData.KeyCode)
+				{
+					case (uint) VirtualKeyCode.A:
+						changed = A != pressed;
+						A = pressed;
+						break;
+					case (uint) VirtualKeyCode.LeftWindows:
+						changed = LeftWindows != pressed;
+						LeftWindows = pressed;
+						break;
+				}
+
+				if (A && LeftWindows && changed)
+				{
+					logger.Debug("Detected toggle sequence for action center.");
+					Toggle?.Invoke();
+
+					return (IntPtr) 1;
+				}
+			}
+
+			return User32.CallNextHookEx(handle, nCode, wParam, lParam);
+		}
+
+		private bool IsPressed(int wParam)
+		{
+			return wParam == Constant.WM_KEYDOWN || wParam == Constant.WM_SYSKEYDOWN;
+		}
+	}
+}

SafeExamBrowser.WindowsApi/Monitoring/KeyboardHook.cs

@@ -17,12 +17,6 @@ namespace SafeExamBrowser.WindowsApi.Monitoring
 {
 	internal class KeyboardHook
 	{
-		private const int LEFT_CTRL = 162;
-		private const int RIGHT_CTRL = 163;
-		private const int LEFT_ALT = 164;
-		private const int RIGHT_ALT = 165;
-		private const int DELETE = 46;
-
 		private bool altPressed, ctrlPressed;
 		private HookDelegate hookDelegate;
 
@@ -40,7 +34,7 @@ namespace SafeExamBrowser.WindowsApi.Monitoring
 			var module = process.MainModule;
 			var moduleHandle = Kernel32.GetModuleHandle(module.ModuleName);
 
-			// IMORTANT:
+			// IMPORTANT:
 			// Ensures that the hook delegate does not get garbage collected prematurely, as it will be passed to unmanaged code.
 			// Not doing so will result in a <c>CallbackOnCollectedDelegate</c> error and subsequent application crash!
 			hookDelegate = new HookDelegate(LowLevelKeyboardProc);
@@ -108,16 +102,16 @@ namespace SafeExamBrowser.WindowsApi.Monitoring
 		{
 			var keyCode = keyData.KeyCode;
 
-			if (keyCode == LEFT_CTRL || keyCode == RIGHT_CTRL)
+			if (keyCode == (uint) VirtualKeyCode.LeftControl || keyCode == (uint) VirtualKeyCode.RightControl)
 			{
 				ctrlPressed = IsPressed(wParam);
 			}
-			else if (keyCode == LEFT_ALT || keyCode == RIGHT_ALT)
+			else if (keyCode == (uint) VirtualKeyCode.LeftAlt || keyCode == (uint) VirtualKeyCode.RightAlt)
 			{
 				altPressed = IsPressed(wParam);
 			}
 
-			if (ctrlPressed && altPressed && keyCode == DELETE)
+			if (ctrlPressed && altPressed && keyCode == (uint) VirtualKeyCode.Delete)
 			{
 				// When the Secure Attention Sequence is pressed, the WM_KEYUP / WM_SYSKEYUP messages for CTRL and ALT get lost...
 				ctrlPressed = false;

SafeExamBrowser.WindowsApi/Monitoring/MouseHook.cs

@@ -33,7 +33,7 @@ namespace SafeExamBrowser.WindowsApi.Monitoring
 			var module = process.MainModule;
 			var moduleHandle = Kernel32.GetModuleHandle(module.ModuleName);
 
-			// IMORTANT:
+			// IMPORTANT:
 			// Ensures that the hook delegate does not get garbage collected prematurely, as it will be passed to unmanaged code.
 			// Not doing so will result in a <c>CallbackOnCollectedDelegate</c> error and subsequent application crash!
 			hookDelegate = new HookDelegate(LowLevelMouseProc);

SafeExamBrowser.WindowsApi/Monitoring/SystemHook.cs

@@ -36,7 +36,7 @@ namespace SafeExamBrowser.WindowsApi.Monitoring
 
 		internal void Attach()
 		{
-			// IMORTANT:
+			// IMPORTANT:
 			// Ensures that the hook delegate does not get garbage collected prematurely, as it will be passed to unmanaged code.
 			// Not doing so will result in a <c>CallbackOnCollectedDelegate</c> error and subsequent application crash!
 			eventDelegate = new EventDelegate(LowLevelSystemProc);

SafeExamBrowser.WindowsApi/SafeExamBrowser.WindowsApi.csproj

@@ -54,6 +54,7 @@
     <Compile Include="Constants\Constant.cs" />
     <Compile Include="Constants\HookType.cs" />
     <Compile Include="Constants\ThreadAccess.cs" />
+    <Compile Include="Constants\VirtualKeyCode.cs" />
     <Compile Include="Delegates\EnumDesktopDelegate.cs" />
     <Compile Include="Delegates\EnumWindowsDelegate.cs" />
     <Compile Include="Delegates\EventDelegate.cs" />
@@ -61,11 +62,13 @@
     <Compile Include="Desktop.cs" />
     <Compile Include="DesktopFactory.cs" />
     <Compile Include="ExplorerShell.cs" />
+    <Compile Include="KeyboardActivator.cs" />
     <Compile Include="Monitoring\MouseHook.cs" />
     <Compile Include="Monitoring\SystemHook.cs" />
     <Compile Include="Process.cs" />
     <Compile Include="ProcessFactory.cs" />
-    <Compile Include="Constants\ACCESS_MASK.cs" />
+    <Compile Include="Constants\AccessMask.cs" />
+    <Compile Include="TouchActivator.cs" />
     <Compile Include="Types\Bounds.cs" />
     <Compile Include="Types\EXECUTION_STATE.cs" />
     <Compile Include="Types\KBDLLHOOKSTRUCT.cs" />

SafeExamBrowser.WindowsApi/TouchActivator.cs

@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+using System;
+using System.Runtime.InteropServices;
+using System.Threading;
+using System.Threading.Tasks;
+using SafeExamBrowser.Contracts.Logging;
+using SafeExamBrowser.Contracts.UserInterface.Shell;
+using SafeExamBrowser.Contracts.UserInterface.Shell.Events;
+using SafeExamBrowser.WindowsApi.Constants;
+using SafeExamBrowser.WindowsApi.Delegates;
+using SafeExamBrowser.WindowsApi.Types;
+
+namespace SafeExamBrowser.WindowsApi
+{
+	public class TouchActivator : IActionCenterActivator
+	{
+		private HookDelegate hookDelegate;
+		private IntPtr handle;
+		private bool isDown;
+		private ILogger logger;
+
+		public event ActivatorEventHandler Activate;
+		public event ActivatorEventHandler Deactivate { add { } remove { } }
+		public event ActivatorEventHandler Toggle { add { } remove { } }
+
+		public TouchActivator(ILogger logger)
+		{
+			this.logger = logger;
+		}
+
+		public void Start()
+		{
+			var hookReadyEvent = new AutoResetEvent(false);
+			var hookThread = new Thread(() =>
+			{
+				var sleepEvent = new AutoResetEvent(false);
+				var process = System.Diagnostics.Process.GetCurrentProcess();
+				var module = process.MainModule;
+				var moduleHandle = Kernel32.GetModuleHandle(module.ModuleName);
+
+				// IMPORTANT:
+				// Ensures that the hook delegate does not get garbage collected prematurely, as it will be passed to unmanaged code.
+				// Not doing so will result in a <c>CallbackOnCollectedDelegate</c> error and subsequent application crash!
+				hookDelegate = new HookDelegate(LowLevelMouseProc);
+
+				handle = User32.SetWindowsHookEx(HookType.WH_MOUSE_LL, hookDelegate, moduleHandle, 0);
+				hookReadyEvent.Set();
+
+				while (true)
+				{
+					sleepEvent.WaitOne();
+				}
+			});
+
+			hookThread.SetApartmentState(ApartmentState.STA);
+			hookThread.IsBackground = true;
+			hookThread.Start();
+
+			hookReadyEvent.WaitOne();
+		}
+
+		public void Stop()
+		{
+			User32.UnhookWindowsHookEx(handle);
+		}
+
+		private IntPtr LowLevelMouseProc(int nCode, IntPtr wParam, IntPtr lParam)
+		{
+			if (nCode >= 0 && !Ignore(wParam.ToInt32()))
+			{
+				var message = wParam.ToInt32();
+				var mouseData = (MSLLHOOKSTRUCT) Marshal.PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT));
+				var position = $"{mouseData.Point.X}/{mouseData.Point.Y}";
+				var extraInfo = mouseData.DwExtraInfo.ToUInt32();
+				var isTouch = (extraInfo & Constant.MOUSEEVENTF_MASK) == Constant.MOUSEEVENTF_FROMTOUCH;
+
+				if (isTouch)
+				{
+					if (message == Constant.WM_LBUTTONUP)
+					{
+						isDown = false;
+					}
+
+					if (message == Constant.WM_LBUTTONDOWN && 0 < mouseData.Point.X && mouseData.Point.X < 50)
+					{
+						isDown = true;
+						Task.Delay(100).ContinueWith(_ => CheckPosition());
+					}
+				}
+			}
+
+			return User32.CallNextHookEx(handle, nCode, wParam, lParam);
+		}
+
+		private void CheckPosition()
+		{
+			var position = new POINT();
+
+			User32.GetCursorPos(ref position);
+
+			if (isDown && position.X > 200)
+			{
+				logger.Debug("Detected activation gesture for action center.");
+				Activate?.Invoke();
+			}
+		}
+
+		private bool Ignore(int wParam)
+		{
+			// For performance reasons, ignore mouse movement and wheel rotation...
+			return wParam == Constant.WM_MOUSEMOVE || wParam == Constant.WM_MOUSEWHEEL;
+		}
+	}
+}

SafeExamBrowser.WindowsApi/User32.cs

@@ -48,6 +48,9 @@ namespace SafeExamBrowser.WindowsApi
 		[DllImport("user32.dll", SetLastError = true)]
 		internal static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
 
+		[DllImport("user32.dll", SetLastError = true)]
+		internal static extern bool GetCursorPos(ref POINT pt);
+
 		[DllImport("user32.dll", SetLastError = true)]
 		internal static extern IntPtr GetThreadDesktop(int dwThreadId);