public static int GetSelectedItemIndexAtPosition(ListBox listBox, GetPositionFromInputElementDelegate getPosition)
{
var index = -1;
if (listBox?.Items != null)
{
for (int i = 0; i < listBox.Items.Count; ++i)
{
if (listBox.SelectedItems.IndexOf(listBox.Items[i]) == -1)
{
continue;
}
var listViewItem = getListViewItem(listBox, i);
if (VisualTreeHelperTools.IsMouseOverTarget(listViewItem, getPosition))
{
index = i;
break;
}
}
}
return(index);
}
private static void DefaultRouteBackwardPreviewMouseWheelHandler(object sender, MouseWheelEventArgs e)
{
if (sender is DependencyObject d && !e.Handled)
{
e.Handled = true;
var args = new MouseWheelEventArgs(e.MouseDevice, e.Timestamp, e.Delta)
{
RoutedEvent = UIElement.MouseWheelEvent,
Source = e.Source,
};
var parent = VisualTreeHelperTools.GetParentObjectRecursive <UIElement>(d);
parent.RaiseEvent(args);
}
}