Tango - Twine softwares

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Tango.MachineStudio.UI.ViewModels;
using Tango.TFS;

namespace Tango.MachineStudio.UI.Views
{
    /// <summary>
    /// Interaction logic for ReportIssueView.xaml
    /// </summary>
    public partial class ReportIssueView : UserControl
    {
        private ReportIssueViewVM _vm;

        public ReportIssueView()
        {
            InitializeComponent();

            this.Loaded += ReportIssueView_Loaded;
            this.DataContextChanged += ReportIssueView_DataContextChanged;
        }

        private void ReportIssueView_DataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
        {
            _vm = this.DataContext as ReportIssueViewVM;
        }

        private void ReportIssueView_Loaded(object sender, RoutedEventArgs e)
        {
            txt_title.Focus();
        }

        private void TreeView_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
        {
            _vm.WorkItem.Area = e.NewValue as Area;
            toggleArea.IsChecked = false;
        }

        private TreeView tree;

        private void TreeView_Loaded(object sender, RoutedEventArgs e)
        {
            tree = sender as TreeView;
            tree.ItemContainerGenerator.StatusChanged += ItemContainerGenerator_StatusChanged;
        }

        private void ItemContainerGenerator_StatusChanged(object sender, EventArgs e)
        {
            if (tree.ItemContainerGenerator.Status == System.Windows.Controls.Primitives.GeneratorStatus.ContainersGenerated)
            {
                TreeViewItem i = tree.ItemContainerGenerator.ContainerFromIndex(0) as TreeViewItem;
                i.IsExpanded = true;
            }
        }
    }
}