public MainWindow()
{
InitializeComponent();
controller = Controller.GetInstance();
controller.SetGui(this);
richTextBox.Visibility = Visibility.Hidden;
}
private void OpenDocment(object sender, RoutedEventArgs e)
{
TreeViewItem item = (TreeViewItem)sender;
String text = File.ReadAllText(item.Tag.ToString()); //IOException, if file is used by another program
Controller.GetInstance().SetOpenDocument(text, item.Header.ToString(), item.Tag.ToString());
}
