using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;

namespace PDF_Master.Views.HomePanel
{
    /// <summary>
    /// HomeGuidContent.xaml 的交互逻辑
    /// </summary>
    public partial class HomeGuidContent : UserControl
    {
        public HomeGuidContent()
        {
            InitializeComponent();
        }

        private void ScrollViewer_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
        {
            e.Handled = true;
            var eventArg = new MouseWheelEventArgs(e.MouseDevice, e.Timestamp, e.Delta)
            {
                RoutedEvent = UIElement.MouseWheelEvent,
                Source = sender
            };
            var listView = FindChild<ListView>(sender as DependencyObject);
            listView.RaiseEvent(eventArg);
        }

        private static T FindChild<T>(DependencyObject parent) where T : DependencyObject
        {
            if (parent == null) return null;

            var foundChild = default(T);
            var childCount = VisualTreeHelper.GetChildrenCount(parent);
            for (var i = 0; i < childCount; i++)
            {
                var child = VisualTreeHelper.GetChild(parent, i);
                if (child is T t)
                {
                    foundChild = t;
                    break;
                }
                foundChild = FindChild<T>(child);
                if (foundChild != null) break;
            }
            return foundChild;
        }
    }
}