SEBWIN-106: Implemented basic zoom functionality for browser.

SafeExamBrowser.Browser/BrowserApplicationController.cs

@@ -149,6 +149,7 @@ namespace SafeExamBrowser.Browser
 
 		private void Instance_PopupRequested(PopupRequestedEventArgs args)
 		{
+			// TODO: Use settings for additional browser windows!
 			var popupSettings = new BrowserSettings
 			{
 				AllowAddressBar = false,

SafeExamBrowser.Browser/BrowserApplicationInstance.cs

@@ -76,7 +76,10 @@ namespace SafeExamBrowser.Browser
 
 			displayHandler.FaviconChanged += DisplayHandler_FaviconChanged;
 			downloadHandler.ConfigurationDownloadRequested += DownloadHandler_ConfigurationDownloadRequested;
-			keyboardHandler.ReloadRequested += KeyboardHandler_ReloadRequested;
+			keyboardHandler.ReloadRequested += ReloadRequested;
+			keyboardHandler.ZoomInRequested += ZoomInRequested;
+			keyboardHandler.ZoomOutRequested += ZoomOutRequested;
+			keyboardHandler.ZoomResetRequested += ZoomResetRequested;
 			lifeSpanHandler.PopupRequested += LifeSpanHandler_PopupRequested;
 
 			control = new BrowserControl(contextMenuHandler, displayHandler, downloadHandler, keyboardHandler, lifeSpanHandler, requestHandler, settings.StartUrl);
@@ -91,40 +94,16 @@ namespace SafeExamBrowser.Browser
 			window.IsMainWindow = isMainInstance;
 			window.Closing += () => Terminated?.Invoke(Id);
 			window.AddressChanged += Window_AddressChanged;
-			window.ReloadRequested += Window_ReloadRequested;
+			window.ReloadRequested += ReloadRequested;
 			window.BackwardNavigationRequested += Window_BackwardNavigationRequested;
 			window.ForwardNavigationRequested += Window_ForwardNavigationRequested;
+			window.ZoomInRequested += ZoomInRequested;
+			window.ZoomOutRequested += ZoomOutRequested;
+			window.ZoomResetRequested += ZoomResetRequested;
 
 			logger.Debug("Initialized browser window.");
 		}
 
-		private void HandleReloadRequest()
-		{
-			if (settings.AllowReloading && settings.ShowReloadWarning)
-			{
-				var result = messageBox.Show(TextKey.MessageBox_ReloadConfirmation, TextKey.MessageBox_ReloadConfirmationTitle, MessageBoxAction.YesNo, MessageBoxIcon.Question, window);
-
-				if (result == MessageBoxResult.Yes)
-				{
-					logger.Debug("The user confirmed reloading the current page...");
-					control.Reload();
-				}
-				else
-				{
-					logger.Debug("The user aborted reloading the current page.");
-				}
-			}
-			else if (settings.AllowReloading)
-			{
-				logger.Debug("Reloading current page...");
-				control.Reload();
-			}
-			else
-			{
-				logger.Debug("Blocked reload attempt, as the user is not allowed to reload web pages.");
-			}
-		}
-
 		private void Control_AddressChanged(string address)
 		{
 			logger.Debug($"Navigated to '{address}'.");
@@ -164,11 +143,6 @@ namespace SafeExamBrowser.Browser
 			}
 		}
 
-		private void KeyboardHandler_ReloadRequested()
-		{
-			HandleReloadRequest();
-		}
-
 		private void LifeSpanHandler_PopupRequested(PopupRequestedEventArgs args)
 		{
 			if (settings.AllowPopups)
@@ -182,17 +156,39 @@ namespace SafeExamBrowser.Browser
 			}
 		}
 
+		private void ReloadRequested()
+		{
+			if (settings.AllowReloading && settings.ShowReloadWarning)
+			{
+				var result = messageBox.Show(TextKey.MessageBox_ReloadConfirmation, TextKey.MessageBox_ReloadConfirmationTitle, MessageBoxAction.YesNo, MessageBoxIcon.Question, window);
+
+				if (result == MessageBoxResult.Yes)
+				{
+					logger.Debug("The user confirmed reloading the current page...");
+					control.Reload();
+				}
+				else
+				{
+					logger.Debug("The user aborted reloading the current page.");
+				}
+			}
+			else if (settings.AllowReloading)
+			{
+				logger.Debug("Reloading current page...");
+				control.Reload();
+			}
+			else
+			{
+				logger.Debug("Blocked reload attempt, as the user is not allowed to reload web pages.");
+			}
+		}
+
 		private void Window_AddressChanged(string address)
 		{
 			logger.Debug($"The user requested to navigate to '{address}'.");
 			control.NavigateTo(address);
 		}
 
-		private void Window_ReloadRequested()
-		{
-			HandleReloadRequest();
-		}
-
 		private void Window_BackwardNavigationRequested()
 		{
 			logger.Debug($"Navigating forwards...");
@@ -204,5 +200,32 @@ namespace SafeExamBrowser.Browser
 			logger.Debug($"Navigating backwards...");
 			control.NavigateForwards();
 		}
+
+		private void ZoomInRequested()
+		{
+			if (settings.AllowPageZoom)
+			{
+				control.ZoomIn();
+				logger.Debug("Increased page zoom.");
+			}
+		}
+
+		private void ZoomOutRequested()
+		{
+			if (settings.AllowPageZoom)
+			{
+				control.ZoomOut();
+				logger.Debug("Decreased page zoom.");
+			}
+		}
+
+		private void ZoomResetRequested()
+		{
+			if (settings.AllowPageZoom)
+			{
+				control.ZoomReset();
+				logger.Debug("Reset page zoom.");
+			}
+		}
 	}
 }

SafeExamBrowser.Browser/BrowserControl.cs

@@ -15,6 +15,8 @@ namespace SafeExamBrowser.Browser
 {
 	internal class BrowserControl : ChromiumWebBrowser, IBrowserControl
 	{
+		private const double ZOOM_FACTOR = 0.1;
+
 		private IContextMenuHandler contextMenuHandler;
 		private IDisplayHandler displayHandler;
 		private IDownloadHandler downloadHandler;
@@ -94,5 +96,32 @@ namespace SafeExamBrowser.Browser
 		{
 			GetBrowser().Reload();
 		}
+
+		public void ZoomReset()
+		{
+			GetBrowser().SetZoomLevel(0);
+		}
+
+		public void ZoomIn()
+		{
+			GetBrowser().GetZoomLevelAsync().ContinueWith(task =>
+			{
+				if (task.IsCompleted)
+				{
+					GetBrowser().SetZoomLevel(task.Result + ZOOM_FACTOR);
+				}
+			});
+		}
+
+		public void ZoomOut()
+		{
+			GetBrowser().GetZoomLevelAsync().ContinueWith(task =>
+			{
+				if (task.IsCompleted)
+				{
+					GetBrowser().SetZoomLevel(task.Result - ZOOM_FACTOR);
+				}
+			});
+		}
 	}
 }

SafeExamBrowser.Browser/Events/ReloadRequestedEventHandler.cs

@@ -1,12 +0,0 @@
-/*
- * 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.Browser.Events
-{
-	internal delegate void ReloadRequestedEventHandler();
-}

SafeExamBrowser.Browser/Handlers/KeyboardHandler.cs

@@ -8,7 +8,7 @@
 
 using System.Windows.Forms;
 using CefSharp;
-using SafeExamBrowser.Browser.Events;
+using SafeExamBrowser.Contracts.UserInterface;
 
 namespace SafeExamBrowser.Browser.Handlers
 {
@@ -17,16 +17,37 @@ namespace SafeExamBrowser.Browser.Handlers
 	/// </remarks>
 	internal class KeyboardHandler : IKeyboardHandler
 	{
-		public event ReloadRequestedEventHandler ReloadRequested;
+		public event ActionRequestedEventHandler ReloadRequested;
+		public event ActionRequestedEventHandler ZoomInRequested;
+		public event ActionRequestedEventHandler ZoomOutRequested;
+		public event ActionRequestedEventHandler ZoomResetRequested;
 
-		public bool OnKeyEvent(IWebBrowser browserControl, IBrowser browser, KeyType type, int windowsKeyCode, int nativeKeyCode, CefEventFlags modifiers, bool isSystemKey)
+		public bool OnKeyEvent(IWebBrowser browserControl, IBrowser browser, KeyType type, int keyCode, int nativeKeyCode, CefEventFlags modifiers, bool isSystemKey)
 		{
+			var ctrl = modifiers.HasFlag(CefEventFlags.ControlDown);
+			var shift = modifiers.HasFlag(CefEventFlags.ShiftDown);
+
+			if (type == KeyType.KeyUp && ((keyCode == (int)Keys.Add && ctrl) || (keyCode == (int)Keys.D1 && ctrl && shift)))
+			{
+				ZoomInRequested?.Invoke();
+			}
+
+			if (type == KeyType.KeyUp && (keyCode == (int) Keys.Subtract || keyCode == (int) Keys.OemMinus) && ctrl)
+			{
+				ZoomOutRequested?.Invoke();
+			}
+
+			if (type == KeyType.KeyUp && (keyCode == (int) Keys.D0 || keyCode == (int) Keys.NumPad0) && ctrl)
+			{
+				ZoomResetRequested?.Invoke();
+			}
+
 			return false;
 		}
 
-		public bool OnPreKeyEvent(IWebBrowser browserControl, IBrowser browser, KeyType type, int windowsKeyCode, int nativeKeyCode, CefEventFlags modifiers, bool isSystemKey, ref bool isKeyboardShortcut)
+		public bool OnPreKeyEvent(IWebBrowser browserControl, IBrowser browser, KeyType type, int keyCode, int nativeKeyCode, CefEventFlags modifiers, bool isSystemKey, ref bool isKeyboardShortcut)
 		{
-			if (type == KeyType.KeyUp && windowsKeyCode == (int) Keys.F5)
+			if (type == KeyType.KeyUp && keyCode == (int) Keys.F5)
 			{
 				ReloadRequested?.Invoke();
 

SafeExamBrowser.Browser/SafeExamBrowser.Browser.csproj

@@ -69,7 +69,6 @@
     <Compile Include="Events\FaviconChangedEventHandler.cs" />
     <Compile Include="Events\PopupRequestedEventArgs.cs" />
     <Compile Include="Events\PopupRequestedEventHandler.cs" />
-    <Compile Include="Events\ReloadRequestedEventHandler.cs" />
     <Compile Include="Handlers\ContextMenuHandler.cs" />
     <Compile Include="BrowserControl.cs">
       <SubType>Component</SubType>

SafeExamBrowser.Contracts/I18n/TextKey.cs

@@ -15,6 +15,7 @@ namespace SafeExamBrowser.Contracts.I18n
 	public enum TextKey
 	{
 		Browser_ShowDeveloperConsole,
+		BrowserWindow_ZoomMenuItem,
 		LogWindow_Title,
 		MessageBox_ApplicationError,
 		MessageBox_ApplicationErrorTitle,

SafeExamBrowser.Contracts/SafeExamBrowser.Contracts.csproj

@@ -174,7 +174,7 @@
     <Compile Include="SystemComponents\ISystemComponent.cs" />
     <Compile Include="SystemComponents\IWirelessNetwork.cs" />
     <Compile Include="SystemComponents\WirelessNetworkStatus.cs" />
-    <Compile Include="UserInterface\Browser\Events\ActionRequestedEventHandler.cs" />
+    <Compile Include="UserInterface\Events\ActionRequestedEventHandler.cs" />
     <Compile Include="UserInterface\Browser\Events\AddressChangedEventHandler.cs" />
     <Compile Include="UserInterface\Browser\Events\LoadingStateChangedEventHandler.cs" />
     <Compile Include="UserInterface\Browser\Events\TitleChangedEventHandler.cs" />

SafeExamBrowser.Contracts/UserInterface/Browser/IBrowserControl.cs

@@ -55,5 +55,20 @@ namespace SafeExamBrowser.Contracts.UserInterface.Browser
 		/// Reloads the current web page.
 		/// </summary>
 		void Reload();
+
+		/// <summary>
+		/// Increases the page zoom.
+		/// </summary>
+		void ZoomIn();
+
+		/// <summary>
+		/// Decreases the page zoom.
+		/// </summary>
+		void ZoomOut();
+
+		/// <summary>
+		/// Resets the page zoom.
+		/// </summary>
+		void ZoomReset();
 	}
 }

SafeExamBrowser.Contracts/UserInterface/Browser/IBrowserWindow.cs

@@ -37,6 +37,21 @@ namespace SafeExamBrowser.Contracts.UserInterface.Browser
 		/// </summary>
 		event ActionRequestedEventHandler ReloadRequested;
 
+		/// <summary>
+		/// Event fired when the user would like to zoom in.
+		/// </summary>
+		event ActionRequestedEventHandler ZoomInRequested;
+
+		/// <summary>
+		/// Event fired when the user would like to zoom out.
+		/// </summary>
+		event ActionRequestedEventHandler ZoomOutRequested;
+
+		/// <summary>
+		/// Event fired when the user would like to reset the zoom factor.
+		/// </summary>
+		event ActionRequestedEventHandler ZoomResetRequested;
+
 		/// <summary>
 		/// Determines whether this window is the main browser window.
 		/// </summary>

SafeExamBrowser.Contracts/UserInterface/Events/ActionRequestedEventHandler.cs

@@ -6,7 +6,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-namespace SafeExamBrowser.Contracts.UserInterface.Browser.Events
+namespace SafeExamBrowser.Contracts.UserInterface
 {
 	/// <summary>
 	/// Indicates that the user requested an action.

SafeExamBrowser.I18n/Text.xml

@@ -3,6 +3,9 @@
   <Entry key="Browser_ShowDeveloperConsole">
     Open Console
   </Entry>
+  <Entry key="BrowserWindow_ZoomMenuItem">
+    Page Zoom
+  </Entry>
   <Entry key="LogWindow_Title">
     Application Log
   </Entry>

SafeExamBrowser.UserInterface.Desktop/BrowserWindow.xaml

@@ -4,13 +4,14 @@
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:fa="http://schemas.fontawesome.io/icons/"
-        xmlns:local="clr-namespace:SafeExamBrowser.UserInterface.Desktop"
+        xmlns:local="clr-namespace:SafeExamBrowser.UserInterface.Desktop.Controls"
         mc:Ignorable="d" Title="BrowserWindow" Background="#FFF0F0F0" Height="500" Width="750" MinHeight="250" MinWidth="250" Icon=".\Images\SafeExamBrowser.ico">
     <Window.Resources>
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
                 <ResourceDictionary Source="./Templates/Buttons.xaml" />
                 <ResourceDictionary Source="./Templates/Colors.xaml" />
+                <ResourceDictionary Source="./Templates/ScrollViewers.xaml" />
             </ResourceDictionary.MergedDictionaries>
         </ResourceDictionary>
     </Window.Resources>
@@ -19,21 +20,47 @@
             <RowDefinition Height="Auto" />
             <RowDefinition Height="*" />
         </Grid.RowDefinitions>
-        <Border Grid.Row="0" BorderBrush="LightGray" BorderThickness="0 0 0 1">
+        <Border Grid.Row="0" BorderBrush="LightGray" BorderThickness="0,0,0,1" Margin="5,0">
             <Grid>
                 <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="Auto" />
+                    <ColumnDefinition Width="Auto" />
+                    <ColumnDefinition Width="Auto" />
                     <ColumnDefinition Width="*" />
                     <ColumnDefinition Width="Auto" />
-                    <ColumnDefinition Width="Auto" />
-                    <ColumnDefinition Width="Auto" />
                 </Grid.ColumnDefinitions>
-                <Grid Grid.Column="0" Height="25" Margin="10">
+                <Button Grid.Column="0" x:Name="BackButton" Height="30" HorizontalAlignment="Center" Margin="5" Template="{StaticResource BrowserButton}" VerticalAlignment="Center" />
+                <Button Grid.Column="1" x:Name="ForwardButton" Height="30" HorizontalAlignment="Center" Margin="5" Template="{StaticResource BrowserButton}" VerticalAlignment="Center" />
+                <Button Grid.Column="2" x:Name="ReloadButton" Height="30" HorizontalAlignment="Center" Margin="5" Template="{StaticResource BrowserButton}" VerticalAlignment="Center" />
+                <Grid Grid.Column="3" Height="25" Margin="5,0">
                     <TextBox x:Name="UrlTextBox" HorizontalAlignment="Stretch" Padding="5,0" VerticalContentAlignment="Center" />
                     <fa:ImageAwesome x:Name="LoadingIcon" Foreground="Gray" HorizontalAlignment="Right" Icon="Spinner" Margin="5,3" SpinDuration="1.5" Visibility="Collapsed" />
                 </Grid>
-                <Button Grid.Column="1" x:Name="ReloadButton" Height="30" HorizontalAlignment="Center" Margin="2.5,5,2.5,5" Template="{StaticResource BrowserButton}" VerticalAlignment="Center" />
+                <Button Grid.Column="4" x:Name="MenuButton" Height="30" HorizontalAlignment="Center" Margin="5" Template="{StaticResource BrowserButton}" VerticalAlignment="Center" />
-                <Button Grid.Column="2" x:Name="BackButton" Height="30" HorizontalAlignment="Center" Margin="2.5,5,2.5,5" Template="{StaticResource BrowserButton}" VerticalAlignment="Center" />
+                <Popup x:Name="MenuPopup" IsOpen="False" Placement="Bottom" PlacementTarget="{Binding ElementName=MenuButton}" HorizontalOffset="-215" VerticalOffset="4">
-                <Button Grid.Column="3" x:Name="ForwardButton" Height="30" HorizontalAlignment="Center" Margin="2.5,5,5,5" Template="{StaticResource BrowserButton}" VerticalAlignment="Center" />
+                    <Border Background="{StaticResource BackgroundBrush}" BorderBrush="LightGray" BorderThickness="0.75,0,0.75,0.75" Width="250">
+                        <StackPanel Orientation="Vertical">
+                            <Grid Height="40">
+                                <Grid.ColumnDefinitions>
+                                    <ColumnDefinition Width="*" />
+                                    <ColumnDefinition Width="Auto" />
+                                    <ColumnDefinition Width="Auto" />
+                                    <ColumnDefinition Width="Auto" />
+                                </Grid.ColumnDefinitions>
+                                <TextBlock Grid.Column="0" x:Name="ZoomText" HorizontalAlignment="Center" VerticalAlignment="Center" />
+                                <Button Grid.Column="1" x:Name="ZoomInButton" Margin="5" Padding="5" Template="{StaticResource BrowserButton}">
+                                    <fa:ImageAwesome Icon="SearchPlus" />
+                                </Button>
+                                <Button Grid.Column="2" x:Name="ZoomResetButton" Margin="5" Padding="5" Template="{StaticResource BrowserButton}">
+                                    <fa:ImageAwesome Icon="Refresh" />
+                                </Button>
+                                <Button Grid.Column="3" x:Name="ZoomOutButton" Margin="5" Padding="5" Template="{StaticResource BrowserButton}">
+                                    <fa:ImageAwesome Icon="SearchMinus" />
+                                </Button>
+                            </Grid>
+                        </StackPanel>
+                    </Border>
+                </Popup>
             </Grid>
         </Border>
         <WindowsFormsHost Grid.Row="1" x:Name="BrowserControlHost" />

SafeExamBrowser.UserInterface.Desktop/BrowserWindow.xaml.cs

@@ -7,11 +7,15 @@
  */
 
 using System;
+using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Input;
+using System.Windows.Media;
 using System.Windows.Media.Imaging;
 using SafeExamBrowser.Contracts.Configuration;
 using SafeExamBrowser.Contracts.Configuration.Settings;
+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;
@@ -24,7 +28,8 @@ namespace SafeExamBrowser.UserInterface.Desktop
 	{
 		private bool isMainWindow;
 		private BrowserSettings settings;
-		public WindowClosingEventHandler closing;
+		private IText text;
+		private WindowClosingEventHandler closing;
 
 		public bool IsMainWindow
 		{
@@ -43,6 +48,9 @@ namespace SafeExamBrowser.UserInterface.Desktop
 		public event ActionRequestedEventHandler BackwardNavigationRequested;
 		public event ActionRequestedEventHandler ForwardNavigationRequested;
 		public event ActionRequestedEventHandler ReloadRequested;
+		public event ActionRequestedEventHandler ZoomInRequested;
+		public event ActionRequestedEventHandler ZoomOutRequested;
+		public event ActionRequestedEventHandler ZoomResetRequested;
 
 		event WindowClosingEventHandler IWindow.Closing
 		{
@@ -50,9 +58,10 @@ namespace SafeExamBrowser.UserInterface.Desktop
 			remove { closing -= value; }
 		}
 
-		public BrowserWindow(IBrowserControl browserControl, BrowserSettings settings)
+		public BrowserWindow(IBrowserControl browserControl, BrowserSettings settings, IText text)
 		{
 			this.settings = settings;
+			this.text = text;
 
 			InitializeComponent();
 			InitializeBrowserWindow(browserControl);
@@ -112,25 +121,36 @@ namespace SafeExamBrowser.UserInterface.Desktop
 
 		private void InitializeBrowserWindow(IBrowserControl browserControl)
 		{
+			var originalBrush = MenuButton.Background;
+
 			if (browserControl is System.Windows.Forms.Control control)
 			{
 				BrowserControlHost.Child = control;
 			}
 
+			BackButton.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();
-			ReloadButton.Click += (o, args) => ReloadRequested?.Invoke();
+			ZoomInButton.Click += (o, args) => ZoomInRequested?.Invoke();
-			BackButton.Click += (o, args) => BackwardNavigationRequested?.Invoke();
+			ZoomOutButton.Click += (o, args) => ZoomOutRequested?.Invoke();
-			ForwardButton.Click += (o, args) => ForwardNavigationRequested?.Invoke();
+			ZoomResetButton.Click += (o, args) => ZoomResetRequested?.Invoke();
 
 			ApplySettings();
 			LoadIcons();
+			LoadText();
 		}
 
 		private void UrlTextBox_GotMouseCapture(object sender, MouseEventArgs e)
@@ -198,14 +218,22 @@ namespace SafeExamBrowser.UserInterface.Desktop
 		{
 			var backUri = new Uri("pack://application:,,,/SafeExamBrowser.UserInterface.Desktop;component/Images/NavigateBack.xaml");
 			var forwardUri = new Uri("pack://application:,,,/SafeExamBrowser.UserInterface.Desktop;component/Images/NavigateForward.xaml");
+			var menuUri = new Uri("pack://application:,,,/SafeExamBrowser.UserInterface.Desktop;component/Images/Menu.xaml");
 			var reloadUri = new Uri("pack://application:,,,/SafeExamBrowser.UserInterface.Desktop;component/Images/Reload.xaml");
 			var back = new XamlIconResource(backUri);
 			var forward = new XamlIconResource(forwardUri);
+			var menu = new XamlIconResource(menuUri);
 			var reload = new XamlIconResource(reloadUri);
 
-			ReloadButton.Content = IconResourceLoader.Load(reload);
 			BackButton.Content = IconResourceLoader.Load(back);
 			ForwardButton.Content = IconResourceLoader.Load(forward);
+			MenuButton.Content = IconResourceLoader.Load(menu);
+			ReloadButton.Content = IconResourceLoader.Load(reload);
+		}
+
+		private void LoadText()
+		{
+			ZoomText.Text = text.Get(TextKey.BrowserWindow_ZoomMenuItem);
 		}
 	}
 }

SafeExamBrowser.UserInterface.Desktop/Images/Menu.xaml

@@ -0,0 +1,7 @@
+<Viewbox Stretch="Uniform"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:fa="http://schemas.fontawesome.io/icons/">
+    <Canvas Height="120" Width="120">
+        <Path Stroke="Black" StrokeLineJoin="Round" StrokeStartLineCap="Round" StrokeEndLineCap="Round" StrokeThickness="8" Data="M 20,30 L 100,30 M 20,60 L 100,60 M 20,90 L 100,90" />
+    </Canvas>
+</Viewbox>

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

@@ -162,6 +162,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Resource Include="Images\Menu.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Resource>
     <Page Include="Templates\ScrollViewers.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>

SafeExamBrowser.UserInterface.Desktop/UserInterfaceFactory.cs

@@ -45,7 +45,7 @@ namespace SafeExamBrowser.UserInterface.Desktop
 
 		public IBrowserWindow CreateBrowserWindow(IBrowserControl control, BrowserSettings settings)
 		{
-			return new BrowserWindow(control, settings);
+			return new BrowserWindow(control, settings, text);
 		}
 
 		public ISystemKeyboardLayoutControl CreateKeyboardLayoutControl()