PDFOffice_Windows_exe/PDF Office/Views/HomePanel/HomeGuidContent.xaml.cs

using PDF_Master.Views.HomePanel.RecentFiles;
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;
        }

        private void Recentlist_MouseDown(object sender, MouseButtonEventArgs e)
        {
            //Windows:最近文件列表补充点击空白处取消选中；移除Esc取消选中逻辑
            if (sender is RecentFilesContent recentFilesContent)
            {
                if (recentFilesContent.GridRecentFilesList.Visibility == Visibility.Visible)
                {
                    var point = e.GetPosition(recentFilesContent.GridRecentFilesList);
                    var result = VisualTreeHelper.HitTest(recentFilesContent.GridRecentFilesList, point);
                    if (result != null)
                    {
                        if (recentFilesContent.GridRecentFilesList.SelectedIndex != -1)
                        {
                            recentFilesContent.GridRecentFilesList.SelectedIndex = -1;
                        }
                    }
                }
                else if (recentFilesContent.RecentFilesList.Visibility == Visibility.Visible)
                {
                    var point = e.GetPosition(recentFilesContent.RecentFilesList);
                    var result = VisualTreeHelper.HitTest(recentFilesContent.RecentFilesList, point);
                    if (result != null)
                    {
                        if (recentFilesContent.RecentFilesList.SelectedIndex != -1)
                        {
                            recentFilesContent.RecentFilesList.SelectedIndex = -1;
                        }
                    }
                }
            }
        }
    }
}