94 lines
2 KiB
C#
94 lines
2 KiB
C#
/*
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* Copyright (c) 2017 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.Threading;
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using System.Windows;
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namespace SafeExamBrowser
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{
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public class App : Application
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{
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private static readonly Mutex mutex = new Mutex(true, "safe_exam_browser_single_instance_mutex");
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private CompositionRoot instances;
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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");
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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");
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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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var initializationThread = new Thread(Initialize);
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instances = new CompositionRoot();
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instances.BuildObjectGraph();
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instances.SplashScreen.Show();
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MainWindow = instances.SplashScreen;
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initializationThread.SetApartmentState(ApartmentState.STA);
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initializationThread.Name = "Initialization Thread";
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initializationThread.Start();
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}
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protected override void OnExit(ExitEventArgs e)
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{
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instances.ShutdownController.FinalizeApplication();
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base.OnExit(e);
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}
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private void Initialize()
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{
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var success = instances.StartupController.TryInitializeApplication();
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if (success)
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{
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Dispatcher.Invoke(() =>
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{
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MainWindow = instances.Taskbar;
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MainWindow.Show();
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});
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}
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else
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{
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Dispatcher.Invoke(Shutdown);
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}
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Dispatcher.Invoke(instances.SplashScreen.Close);
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}
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}
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}
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