问Prism、AvalonDock区域适配器(处理close DocumentPane事件)

EN

private void OnViewsCollectionChanged(object sender, NotifyCollectionChangedEventArgs e, IRegion region, DocumentPane regionTarget)
{
    if (e.Action == NotifyCollectionChangedAction.Add)
    {
        foreach (object item in e.NewItems)
        {
            UIElement view = item as UIElement;

            if (view != null)
            {
                DockableContent newContentPane = new DockableContent()
                {
                    Content = item,
                    Title = ((ITabViewInfo)view).TabViewTitle
                    Icon = ((ITabViewInfo)view).TabViewIcon
                };
                newContentPane.Closed += new EventHandler(newContentPane_Closed);
                newContentPane.Manager.DocumentClosed +=new EventHandler(Manager_DocumentClosed);
                newContentPane.Manager.DocumentClosing +=new EventHandler<System.ComponentModel.CancelEventArgs>(Manager_DocumentClosing);

                regionTarget.Items.Add(newContentPane);
                newContentPane.Activate();
            }
        }
    }
    else if (e.Action == NotifyCollectionChangedAction.Remove)
    {
        // this is never hit
        Debug.WriteLine("removed");
    }
}

        newContentPane.Closed += new EventHandler(newContentPane_Closed);
        newContentPane.Manager.DocumentClosed +=new EventHandler(Manager_DocumentClosed);
        newContentPane.Manager.DocumentClosing +=new EventHandler<System.ComponentModel.CancelEventArgs>(Manager_DocumentClosing);