System.Windows.Controls.MultiSelectTreeViewItem.OnPropertyChanged C# (CSharp) Méthode

        protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
        {
            if (ParentTreeView == null) return;

            //System.Diagnostics.Debug.WriteLine("P(" + ParentTreeView.Name + "): " + e.Property + " " + e.NewValue);
            if (e.Property.Name == "IsEditing")
            {
                if ((bool) e.NewValue == false)
                {
                    StopEditing();
                }
            }

            if (e.Property.Name == "IsExpanded")
            {
                // Bring newly expanded child nodes into view if they'd be outside of the current view
                if ((bool) e.NewValue == true)
                {
                    if (VisualChildrenCount > 0)
                    {
                        ((FrameworkElement) GetVisualChild(VisualChildrenCount - 1)).BringIntoView();
                    }
                }
                // Deselect children of collapsed item
                // (If one resists, don't collapse)
                if ((bool) e.NewValue == false)
                {
                    if (!ParentTreeView.DeselectRecursive(this, false))
                    {
                        IsExpanded = true;
                    }
                }
            }

            if (e.Property.Name == "IsVisible")
            {
                // Deselect invisible item and its children
                // (If one resists, don't hide)
                if ((bool) e.NewValue == false)
                {
                    if (!ParentTreeView.DeselectRecursive(this, true))
                    {
                        IsVisible = true;
                    }
                }
            }

            base.OnPropertyChanged(e);
        }