/// <summary>
/// Initializes a new instance of the <see cref="GameApplication"/> class.</summary>
/// <remarks><para>
/// This constructor performs the following actions:
/// </para><list type="bullet"><item>
/// Call <see cref="ApplicationUtility.CheckSingleInstance"/> to make sure that the current
/// user is not already running another instance of the <see cref="GameApplication"/>.
/// </item><item>
/// Call <see cref="FilePaths.CheckUserFolders"/> to make sure that the current user has
/// write permission in the directories that hold user-specific data.
/// </item><item>
/// Attach a handler to the <see cref="Application.DispatcherUnhandledException"/> event
/// that calls <see cref="ApplicationUtility.OnUnhandledException"/>.
/// </item><item>
/// Create a global instance of the <see cref="ApplicationOptions"/> class and load the
/// current user settings.</item></list></remarks>
public GameApplication()
{
// make sure this is the only instance
if (!ApplicationUtility.CheckSingleInstance())
{
Application.Current.Shutdown(-1);
return;
}
// make sure we can create user files
if (!FilePaths.CheckUserFolders())
{
Application.Current.Shutdown(-2);
return;
}
// hook up custom exception handler
Application.Current.DispatcherUnhandledException += OnUnhandledException;
// read user settings from Hexkit Game options file
ApplicationOptions options = ApplicationOptions.CreateInstance();
// select user-defined display theme, if any
if (options.View.Theme != DefaultTheme.System)
{
DefaultThemeSetter.Select(options.View.Theme);
}
}