How to achieve a scrolling effect with ListBox.ScrollIntoView.

Hi guys,

I am trying to achieve a scrolling effect (please see fig. below) with ListBox.ScrollIntoView.

However, instead of Scrolling Into View, the items jumped into view. 2 questions:

1, Did I miss something with ListBox.ScrollIntoView?

2. What is the proper way to  achieve the scrolling effect?

Thanks.

Here is the xaml

<Window x:Class="ScrollIntoView.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525"><Grid><ListBox x:Name="ListBox1" ScrollViewer.HorizontalScrollBarVisibility="Hidden"  HorizontalAlignment="Left" Height="30" Margin="218,140,0,0" VerticalAlignment="Top" Width="47"><ListBox.ItemsPanel><ItemsPanelTemplate><StackPanel Orientation="Horizontal"/></ItemsPanelTemplate></ListBox.ItemsPanel><ListBoxItem FontSize="16">1</ListBoxItem><ListBoxItem FontSize="16">2</ListBoxItem><ListBoxItem FontSize="16">3</ListBoxItem><ListBoxItem FontSize="16">4</ListBoxItem><ListBoxItem FontSize="16">5</ListBoxItem><ListBoxItem FontSize="16">6</ListBoxItem><ListBoxItem FontSize="16">7</ListBoxItem><ListBoxItem FontSize="16">8</ListBoxItem></ListBox><Button x:Name="Btn_MoveRight" Content="Move Right" HorizontalAlignment="Left" Height="20" Margin="275,140,0,0" VerticalAlignment="Top" Width="70" Click="Btn_MoveLeft_Click"/><Button x:Name="Btn_MoveLeft" Content="Move Left" HorizontalAlignment="Left" Height="20" Margin="135,140,0,0" VerticalAlignment="Top" Width="70" Click="Btn_MoveRight_Click"/></Grid></Window>

Here is the xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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 ScrollIntoView
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Btn_MoveLeft_Click(object sender, System.Windows.RoutedEventArgs e)
        {

			ListBox1.ScrollIntoView(ListBox1.Items[6]);
        }

        private void Btn_MoveRight_Click(object sender, System.Windows.RoutedEventArgs e)
        {

			ListBox1.ScrollIntoView(ListBox1.Items[0]);
        }
    }
}