Implemented draft of the about window.

SafeExamBrowser.Configuration/SafeExamBrowser.Configuration.csproj

@@ -60,8 +60,6 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="AboutNotificationIconResource.cs" />
-    <Compile Include="AboutNotificationInfo.cs" />
     <Compile Include="Settings\BrowserSettings.cs" />
     <Compile Include="Settings\SettingsImpl.cs" />
     <Compile Include="WorkingArea.cs" />

SafeExamBrowser.Contracts/Behaviour/INotificationController.cs

@@ -16,5 +16,10 @@ namespace SafeExamBrowser.Contracts.Behaviour
 		/// Registers the taskbar notification.
 		/// </summary>
 		void RegisterNotification(ITaskbarNotification notification);
+
+		/// <summary>
+		/// Instructs the controller to shut down and release all used resources.
+		/// </summary>
+		void Terminate();
 	}
 }

SafeExamBrowser.Contracts/UserInterface/IUserInterfaceFactory.cs

@@ -14,6 +14,11 @@ namespace SafeExamBrowser.Contracts.UserInterface
 {
 	public interface IUserInterfaceFactory : IMessageBox
 	{
+		/// <summary>
+		/// Creates a new about window displaying information about the currently running application version.
+		/// </summary>
+		IWindow CreateAboutWindow(ISettings settings, IText text);
+
 		/// <summary>
 		/// Creates a taskbar button, initialized with the given application information.
 		/// </summary>

SafeExamBrowser.Core/Behaviour/Operations/TaskbarOperation.cs

@@ -7,27 +7,31 @@
  */
 
 using SafeExamBrowser.Contracts.Behaviour;
-using SafeExamBrowser.Contracts.Configuration;
+using SafeExamBrowser.Contracts.Configuration.Settings;
 using SafeExamBrowser.Contracts.I18n;
 using SafeExamBrowser.Contracts.Logging;
 using SafeExamBrowser.Contracts.UserInterface;
+using SafeExamBrowser.Core.Notifications;
 
 namespace SafeExamBrowser.Core.Behaviour.Operations
 {
 	public class TaskbarOperation : IOperation
 	{
 		private ILogger logger;
+		private INotificationController aboutController;
 		private ITaskbar taskbar;
 		private IUserInterfaceFactory uiFactory;
-		private INotificationInfo aboutInfo;
+		private IText text;
+		private ISettings settings;
 
 		public ISplashScreen SplashScreen { private get; set; }
 
-		public TaskbarOperation(ILogger logger, INotificationInfo aboutInfo, ITaskbar taskbar, IUserInterfaceFactory uiFactory)
+		public TaskbarOperation(ILogger logger, ISettings settings, ITaskbar taskbar, IText text, IUserInterfaceFactory uiFactory)
 		{
 			this.logger = logger;
-			this.aboutInfo = aboutInfo;
+			this.settings = settings;
 			this.taskbar = taskbar;
+			this.text = text;
 			this.uiFactory = uiFactory;
 		}
 
@@ -36,14 +40,18 @@ namespace SafeExamBrowser.Core.Behaviour.Operations
 			logger.Info("Initializing taskbar...");
 			SplashScreen.UpdateText(Key.SplashScreen_InitializeTaskbar);
 
+			var aboutInfo = new AboutNotificationInfo(text);
 			var aboutNotification = uiFactory.CreateNotification(aboutInfo);
 
+			aboutController = new AboutNotificationController(settings, text, uiFactory);
+			aboutController.RegisterNotification(aboutNotification);
+
 			taskbar.AddNotification(aboutNotification);
 		}
 
 		public void Revert()
 		{
-			// Nothing to do here so far...
+			aboutController.Terminate();
 		}
 	}
 }

SafeExamBrowser.Core/Notifications/AboutNotificationController.cs

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2017 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 SafeExamBrowser.Contracts.Behaviour;
+using SafeExamBrowser.Contracts.Configuration.Settings;
+using SafeExamBrowser.Contracts.I18n;
+using SafeExamBrowser.Contracts.UserInterface;
+
+namespace SafeExamBrowser.Core.Notifications
+{
+	public class AboutNotificationController : INotificationController
+	{
+		private ITaskbarNotification notification;
+		private ISettings settings;
+		private IText text;
+		private IUserInterfaceFactory uiFactory;
+		private IWindow window;
+
+		public AboutNotificationController(ISettings settings, IText text, IUserInterfaceFactory uiFactory)
+		{
+			this.settings = settings;
+			this.text = text;
+			this.uiFactory = uiFactory;
+		}
+
+		public void RegisterNotification(ITaskbarNotification notification)
+		{
+			this.notification = notification;
+
+			notification.Clicked += Notification_Clicked;
+		}
+
+		public void Terminate()
+		{
+			window?.Close();
+		}
+
+		private void Notification_Clicked()
+		{
+			if (window == null)
+			{
+				window = uiFactory.CreateAboutWindow(settings, text);
+
+				window.Closing += () => window = null;
+				window.Show();
+			}
+			else
+			{
+				window.BringToForeground();
+			}
+		}
+	}
+}

SafeExamBrowser.Core/Notifications/AboutNotificationIconResource.cs

@@ -9,7 +9,7 @@
 using System;
 using SafeExamBrowser.Contracts.Configuration;
 
-namespace SafeExamBrowser.Configuration
+namespace SafeExamBrowser.Core.Notifications
 {
 	public class AboutNotificationIconResource : IIconResource
 	{

SafeExamBrowser.Core/Notifications/AboutNotificationInfo.cs

@@ -9,7 +9,7 @@
 using SafeExamBrowser.Contracts.Configuration;
 using SafeExamBrowser.Contracts.I18n;
 
-namespace SafeExamBrowser.Configuration
+namespace SafeExamBrowser.Core.Notifications
 {
 	public class AboutNotificationInfo : INotificationInfo
 	{

SafeExamBrowser.Core/SafeExamBrowser.Core.csproj

@@ -75,6 +75,9 @@
     <Compile Include="Logging\LogText.cs" />
     <Compile Include="Logging\ModuleLogger.cs" />
     <Compile Include="Logging\ThreadInfo.cs" />
+    <Compile Include="Notifications\AboutNotificationController.cs" />
+    <Compile Include="Notifications\AboutNotificationIconResource.cs" />
+    <Compile Include="Notifications\AboutNotificationInfo.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>

SafeExamBrowser.UserInterface/AboutWindow.xaml

@@ -0,0 +1,41 @@
+<Window x:Class="SafeExamBrowser.UserInterface.AboutWindow"
+        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"
+        mc:Ignorable="d"
+        Title="About" Height="350" Width="450" ResizeMode="NoResize" Icon="./Images/SafeExamBrowser.ico"
+        ShowInTaskbar="False" WindowStartupLocation="CenterScreen">
+    <Window.Background>
+        <SolidColorBrush Color="Black" Opacity="0.8" />
+    </Window.Background>
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition />
+            <RowDefinition />
+        </Grid.RowDefinitions>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition />
+            <ColumnDefinition />
+        </Grid.ColumnDefinitions>
+        <Image Grid.ColumnSpan="2" Source="pack://application:,,,/SafeExamBrowser.UserInterface;component/Images/SplashScreen.png" />
+        <TextBlock x:Name="VersionInfo" Grid.Row="0" Grid.Column="1" Foreground="White" Margin="50,75,35,10" TextWrapping="Wrap" FontSize="10" />
+        <ScrollViewer Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" VerticalScrollBarVisibility="Auto">
+            <TextBlock x:Name="MainText" Foreground="White" Margin="10" FontSize="10" TextWrapping="Wrap">
+                This application is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed
+                with this application, You can obtain one at http://mozilla.org/MPL/2.0/.
+                <LineBreak />
+                <LineBreak />
+                <Bold><Underline>CefSharp (.NET bindings for the Chromium Embedded Framework)</Underline></Bold>
+                <LineBreak />
+                Copyright © 2010-2017 The CefSharp Authors. All rights reserved.
+                <LineBreak />
+                <LineBreak />
+                <Bold><Underline>CEF (Chromium Embedded Framework)</Underline></Bold>
+                <LineBreak />
+                Copyright © 2008-2014 Marshall A. Greenblatt. Portions Copyright © 2006-2009 Google Inc. All rights reserved.
+            </TextBlock>
+        </ScrollViewer>
+    </Grid>
+</Window>

SafeExamBrowser.UserInterface/AboutWindow.xaml.cs

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2017 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.Windows;
+using System.Windows.Documents;
+using SafeExamBrowser.Contracts.Configuration.Settings;
+using SafeExamBrowser.Contracts.I18n;
+using SafeExamBrowser.Contracts.UserInterface;
+
+namespace SafeExamBrowser.UserInterface
+{
+	public partial class AboutWindow : Window, IWindow
+	{
+		private ISettings settings;
+		private IText text;
+		private WindowClosingEventHandler closing;
+
+		event WindowClosingEventHandler IWindow.Closing
+		{
+			add { closing += value; }
+			remove { closing -= value; }
+		}
+
+		public AboutWindow(ISettings settings, IText text)
+		{
+			this.settings = settings;
+			this.text = text;
+
+			InitializeComponent();
+			InitializeAboutWindow();
+		}
+
+		public void BringToForeground()
+		{
+			Activate();
+		}
+
+		private void InitializeAboutWindow()
+		{
+			Closing += (o, args) => closing?.Invoke();
+			VersionInfo.Inlines.Add(new Run($"{text.Get(Key.Version)} {settings.ProgramVersion}") { FontStyle = FontStyles.Italic });
+			VersionInfo.Inlines.Add(new LineBreak());
+			VersionInfo.Inlines.Add(new LineBreak());
+			VersionInfo.Inlines.Add(new Run(settings.ProgramCopyright));
+		}
+	}
+}

SafeExamBrowser.UserInterface/SafeExamBrowser.UserInterface.csproj

@@ -67,6 +67,9 @@
     <Reference Include="WindowsFormsIntegration" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="AboutWindow.xaml.cs">
+      <DependentUpon>AboutWindow.xaml</DependentUpon>
+    </Compile>
     <Compile Include="BrowserWindow.xaml.cs">
       <DependentUpon>BrowserWindow.xaml</DependentUpon>
     </Compile>
@@ -118,6 +121,10 @@
     </None>
   </ItemGroup>
   <ItemGroup>
+    <Page Include="AboutWindow.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="BrowserWindow.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>

SafeExamBrowser.UserInterface/UserInterfaceFactory.cs

@@ -18,6 +18,11 @@ namespace SafeExamBrowser.UserInterface
 {
 	public class UserInterfaceFactory : IUserInterfaceFactory
 	{
+		public IWindow CreateAboutWindow(ISettings settings, IText text)
+		{
+			return new AboutWindow(settings, text);
+		}
+
 		public ITaskbarButton CreateApplicationButton(IApplicationInfo info)
 		{
 			return new ApplicationButton(info);

SafeExamBrowser/CompositionRoot.cs

@@ -35,7 +35,6 @@ namespace SafeExamBrowser
 		private IEventController eventController;
 		private ILogger logger;
 		private INativeMethods nativeMethods;
-		private INotificationInfo aboutInfo;
 		private IProcessMonitor processMonitor;
 		private ISettings settings;
 		private IText text;
@@ -62,7 +61,6 @@ namespace SafeExamBrowser
 			logger.Subscribe(new LogFileWriter(settings));
 
 			text = new Text(textResource);
-			aboutInfo = new AboutNotificationInfo(text);
 			browserController = new BrowserApplicationController(settings, text, uiFactory);
 			processMonitor = new ProcessMonitor(new ModuleLogger(logger, typeof(ProcessMonitor)), nativeMethods);
 			windowMonitor = new WindowMonitor(new ModuleLogger(logger, typeof(WindowMonitor)), nativeMethods);
@@ -76,7 +74,7 @@ namespace SafeExamBrowser
 			StartupOperations.Enqueue(new WindowMonitorOperation(logger, windowMonitor));
 			StartupOperations.Enqueue(new ProcessMonitorOperation(logger, processMonitor));
 			StartupOperations.Enqueue(new WorkingAreaOperation(logger, Taskbar, workingArea));
-			StartupOperations.Enqueue(new TaskbarOperation(logger, aboutInfo, Taskbar, uiFactory));
+			StartupOperations.Enqueue(new TaskbarOperation(logger, settings, Taskbar, text, uiFactory));
 			StartupOperations.Enqueue(new BrowserOperation(browserController, browserInfo, logger, Taskbar, uiFactory));
 			StartupOperations.Enqueue(new EventControllerOperation(eventController, logger));
 		}