Hi, i have this UserControl, using xamcarouselpanel.

I need to bring in the middle of the path one of the carousel items (a button or similar) when the user clicks it.

 I need the Index of the item the user clicks, so I can do some calculations.

following the xaml and the c#:

<UserControl
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    x:Class="MovingCarousel.MainMenu"
    x:Name="UserControl"
    d:DesignWidth="640" d:DesignHeight="480" xmlns:igWindows="http://infragistics.com/Windows">

    <Grid x:Name="LayoutRoot">
            
        <igWindows:XamCarouselPanel x:Name="MainCarouselPanel" Margin="0,0,0,20">    
            <igWindows:XamCarouselPanel.ViewSettings>
                <igWindows:CarouselViewSettings
                        
                        UseOpacity="True"
                        IsListContinuous="True">
                </igWindows:CarouselViewSettings>
            </igWindows:XamCarouselPanel.ViewSettings>
            
            <!-- contenuto -->
            <Button x:Name="b1" Content="b1" Click="ButtonaAll_Click"/>
            <Button x:Name="b2" Content="b2" Click="ButtonaAll_Click"/>
            <Button x:Name="b3" Content="b3" Click="ButtonaAll_Click"/>
            <Button x:Name="b4" Content="b4" Click="ButtonaAll_Click"/>
            <Button x:Name="b5" Content="b5" Click="ButtonaAll_Click"/>
            <!-- /contenuto -->
            
        </igWindows:XamCarouselPanel>
    </Grid>
</UserControl>

using System;
using System.IO;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using Infragistics.Windows.Controls;
using System.Windows.Data;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Navigation;

namespace MovingCarousel
{
    public partial class MainMenu
    {

        public MainMenu()
        {
            this.InitializeComponent();
            // Insert code required on object creation below this point.
        }

        private void ButtonaAll_Click(object sender, RoutedEventArgs e)
        {
            CarouselViewSettings viewSettings = this.MainCarouselPanel.ViewSettings;
            int centerOffset = viewSettings.ItemsPerPage / 2;;
            int rem;
           
            Math.DivRem(viewSettings.ItemsPerPage, 2, out rem);
            if (rem > 0)
                centerOffset++;

            MainCarouselPanel.SetVerticalOffset(MainCarouselPanel.ChildElements.IndexOf((Button)sender) - centerOffset + 1);
        }
    }
}
 

p.s. I tried with  MainCarouselPanel.ChildElements.IndexOf((Button)sender) but it returns always "-1". Please help me, it's very urgent..