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

        protected override void OnMouseDown(MouseButtonEventArgs e)
        {
            //System.Diagnostics.Debug.WriteLine("MultiSelectTreeViewItem.OnMouseDown(Item = " + this.DisplayName + ", Button = " + e.ChangedButton + ")");
            base.OnMouseDown(e);

            FrameworkElement itemContent = (FrameworkElement) this.Template.FindName("headerBorder", this);
            if (!itemContent.IsMouseOver)
            {
                // A (probably disabled) child item was really clicked, do nothing here
                return;
            }

            if (e.ChangedButton == MouseButton.Left)
            {
                ParentTreeView.Selection.Select(this);
                e.Handled = true;
            }
            if (e.ChangedButton == MouseButton.Right)
            {
                if (!IsSelected)
                {
                    ParentTreeView.Selection.Select(this);
                }
                e.Handled = true;
            }
        }