101 lines
2.5 KiB
C#
101 lines
2.5 KiB
C#
/*
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* Copyright (c) 2021 ETH Zürich, Educational Development and Technology (LET)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System;
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using System.Runtime.InteropServices;
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using System.Threading;
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using System.Windows;
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using SafeExamBrowser.Configuration.Contracts;
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namespace SafeExamBrowser.Client
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{
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public class App : Application
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{
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private const int ILMCM_CHECKLAYOUTANDTIPENABLED = 0x00001;
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private const int ILMCM_LANGUAGEBAROFF = 0x00002;
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private static readonly Mutex Mutex = new Mutex(true, AppConfig.CLIENT_MUTEX_NAME);
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private CompositionRoot instances = new CompositionRoot();
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[STAThread]
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public static void Main()
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{
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try
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{
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StartApplication();
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}
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catch (Exception e)
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{
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MessageBox.Show(e.Message + "\n\n" + e.StackTrace, "Fatal Error", MessageBoxButton.OK, MessageBoxImage.Error);
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}
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finally
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{
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Mutex.Close();
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}
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}
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private static void StartApplication()
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{
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if (NoInstanceRunning())
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{
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new App().Run();
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}
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else
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{
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MessageBox.Show("You can only run one instance of SEB at a time.", "Startup Not Allowed", MessageBoxButton.OK, MessageBoxImage.Information);
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}
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}
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private static bool NoInstanceRunning()
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{
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return Mutex.WaitOne(TimeSpan.Zero, true);
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}
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protected override void OnStartup(StartupEventArgs e)
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{
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base.OnStartup(e);
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ShutdownMode = ShutdownMode.OnExplicitShutdown;
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// We need to manually initialize a monitor in order to prevent Windows from automatically doing so and thus rendering an input lanuage
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// switch in the bottom right corner of the desktop. This must be done before any UI element is initialized or rendered on the screen.
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InitLocalMsCtfMonitor(ILMCM_CHECKLAYOUTANDTIPENABLED | ILMCM_LANGUAGEBAROFF);
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instances.BuildObjectGraph(Shutdown);
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instances.LogStartupInformation();
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var success = instances.ClientController.TryStart();
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if (!success)
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{
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Shutdown();
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}
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}
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public new void Shutdown()
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{
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void shutdown()
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{
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instances.ClientController.Terminate();
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instances.LogShutdownInformation();
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UninitLocalMsCtfMonitor();
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base.Shutdown();
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}
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Dispatcher.InvokeAsync(shutdown);
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}
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[DllImport("MsCtfMonitor.dll", SetLastError = true)]
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private static extern IntPtr InitLocalMsCtfMonitor(int dwFlags);
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[DllImport("MsCtfMonitor.dll", SetLastError = true)]
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private static extern IntPtr UninitLocalMsCtfMonitor();
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}
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}
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