using System.Windows.Controls;
using HandyControl.Tools;

namespace HandyControlDemo.UserControl;

public partial class ChatBox
{
    private ScrollViewer _scrollViewer;

    public ChatBox()
    {
        InitializeComponent();
        ListBoxChat.ItemContainerGenerator.ItemsChanged += ItemContainerGenerator_ItemsChanged;
    }

    private void ItemContainerGenerator_ItemsChanged(object sender, System.Windows.Controls.Primitives.ItemsChangedEventArgs e)
    {
        _scrollViewer ??= VisualHelper.GetChild<ScrollViewer>(ListBoxChat);
        _scrollViewer?.ScrollToBottom();
    }
}