AIKKEY_WPFWin7/AIK.Views/MenuPages/RemoteGeneration/RemoteGenerationPage.xaml.cs

using AIK.ViewModels;
using AIK.ViewModels.CommonViewModel;
using AIK.ViewModels.RemoteGeneration;
using CommunityToolkit.Mvvm.DependencyInjection;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace AIK.Views.MenuPages.RemoteGeneration
{
    /// <summary>
    /// RemoteGenerationPage.xaml 的交互逻辑
    /// </summary>
    public partial class RemoteGenerationPage : UserControl
    {
        public IReadOnlyList<string> LetterIndexes { get; } =
            Enumerable.Range('A', 26).Select(c => ((char)c).ToString()).ToArray();

        public RemoteGenerationPage()
        {
            InitializeComponent();
            //if (!IsInDesignMode())
            //{
            //    DataContext = Ioc.Default.GetService<KeyModelViewModel>();
            //}
            DataContext = Ioc.Default.GetService<RemoteGenerationViewModel>();
        }

        private static bool IsInDesignMode()
        {
            return DesignerProperties.GetIsInDesignMode(new DependencyObject());
        }

        private void LetterIndexButton_Click(object sender, RoutedEventArgs e)
        {
            if (sender is not Button button || button.Content is not string letter)
            {
                return;
            }

            var groupContainer = FindVisualChildren<FrameworkElement>(BrandGroupsList)
                .FirstOrDefault(element => string.Equals(element.Tag as string, letter, StringComparison.OrdinalIgnoreCase));

            if (groupContainer == null)
            {
                return;
            }

            ScrollGroupToTop(groupContainer);
        }

        private void ScrollGroupToTop(FrameworkElement groupContainer)
        {
            if (!groupContainer.IsLoaded)
            {
                return;
            }

            var groupPosition = groupContainer.TransformToAncestor(scrList).Transform(new Point(0, 0));
            var targetOffset = scrList.VerticalOffset + groupPosition.Y;
            scrList.ScrollToVerticalOffset(Math.Max(0, targetOffset));
        }

        private static IEnumerable<T> FindVisualChildren<T>(DependencyObject parent) where T : DependencyObject
        {
            if (parent == null)
            {
                yield break;
            }

            var childCount = VisualTreeHelper.GetChildrenCount(parent);
            for (var index = 0; index < childCount; index++)
            {
                var child = VisualTreeHelper.GetChild(parent, index);
                if (child is T typedChild)
                {
                    yield return typedChild;
                }

                foreach (var descendant in FindVisualChildren<T>(child))
                {
                    yield return descendant;
                }
            }
        }
    }
}