private static object OnCoerceTopIndexProperty(DependencyObject sender, object data)
{
ExtendedListView listView = sender as ExtendedListView;
int topIndex = (int)data;
if (topIndex > listView.Items.Count - 1)
{
return(listView.Items.Count - 1);
}
if (topIndex < 0)
{
return(0);
}
return(topIndex);
}
private static void OnTopIndexChangedProperty(DependencyObject source, DependencyPropertyChangedEventArgs e)
{
ExtendedListView listView = source as ExtendedListView;
if (listView.Items.Count == 0)
{
return;
}
ScrollViewer scrollViewer = GetChildOfType <ScrollViewer>(listView);
if (scrollViewer != null)
{
scrollViewer.ScrollToBottom();
listView.ScrollIntoView(listView.Items[listView.TopIndex]);
}
}