/// <summary>SelectedItemChangedイベントハンドラ。</summary>
        /// <param name="e">イベントデータを格納しているRoutedPropertyChangedEventArgs<object>。</param>
        private void nodeChanged(RoutedPropertyChangedEventArgs <object> e)
        {
            var viewName = string.Empty;
            var current  = e.NewValue as TreeViewItemViewModel;

            switch (current.SourceData)
            {
            case PersonalInformation p:
                viewName = "PersonalEditor";
                break;

            case PhysicalInformation p:
                viewName = "PhysicalEditor";
                break;

            case TestPointInformation t:
                viewName = "TestPointEditor";
                break;

            case string s:
                viewName = "CategoryPanel";
                break;
            }

            var param = new Prism.Regions.NavigationParameters();

            param.Add("TargetData", current.SourceData);

            this.regionManager.RequestNavigate("EditorArea", viewName, param);
        }
        /// <summary>SelectedItemChangedイベントハンドラ。</summary>
        /// <param name="e">イベントデータを格納しているRoutedPropertyChangedEventArgs<object>。</param>
        private void nodeChanged(RoutedPropertyChangedEventArgs <object> e)
        {
            if (this.skipNodeChange)
            {
                this.skipNodeChange = false;
                return;
            }

            var viewName = string.Empty;
            var current  = e.NewValue as TreeViewItemViewModel;

            switch (current.SourceData)
            {
            case PersonalInformation p:
                viewName = "PersonalEditor";
                break;

            case PhysicalInformation p:
                viewName = "PhysicalEditor";
                break;

            case TestPointInformation t:
                viewName = "TestPointEditor";
                break;

            case string s:
                viewName = "CategoryPanel";
                break;
            }

            var param = new Prism.Regions.NavigationParameters();

            param.Add("TargetData", current.SourceData);

            this.regionManager.RequestNavigate("EditorArea", viewName, r =>
            {
                if ((r.Result.HasValue) && (!r.Result.Value))
                {
                    var oldNode              = e.OldValue as TreeViewItemViewModel;
                    this.skipNodeChange      = true;
                    oldNode.IsSelected.Value = true;
                }
            }, param);
        }