public AutoScroller(ItemsControl itemsControl)
{
if (itemsControl == null)
{
throw new ArgumentNullException("itemsControl");
}
this.itemsControl = itemsControl;
this.scrollViewer = ListBoxDragSelectionBehavior.FindChild <ScrollViewer>(itemsControl);
this.scrollViewer.ScrollChanged += new ScrollChangedEventHandler(this.OnScrollChanged);
this.scrollContent = ListBoxDragSelectionBehavior.FindChild <ScrollContentPresenter>(this.scrollViewer);
this.autoScroll.Tick += new EventHandler((object param0, EventArgs param1) => this.PreformScroll());
this.autoScroll.Interval = TimeSpan.FromMilliseconds((double)ListBoxDragSelectionBehavior.AutoScroller.GetRepeatRate());
}
private bool Register()
{
this.scrollContent = ListBoxDragSelectionBehavior.FindChild <ScrollContentPresenter>(this.listBox);
if (this.scrollContent != null)
{
this.autoScroller = new ListBoxDragSelectionBehavior.AutoScroller(this.listBox);
this.autoScroller.OffsetChanged += new EventHandler <ListBoxDragSelectionBehavior.OffsetChangedEventArgs>(this.OnOffsetChanged);
this.selectionRect = new ListBoxDragSelectionBehavior.SelectionAdorner(this.scrollContent);
this.scrollContent.AdornerLayer.Add(this.selectionRect);
this.selector = new ListBoxDragSelectionBehavior.ItemsControlSelector(this.listBox);
this.listBox.PreviewMouseLeftButtonDown += new MouseButtonEventHandler(this.OnPreviewMouseLeftButtonDown);
this.listBox.MouseLeftButtonUp += new MouseButtonEventHandler(this.OnMouseLeftButtonUp);
this.listBox.MouseMove += new MouseEventHandler(this.OnMouseMove);
}
return(this.scrollContent != null);
}