// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
//
// Description: Proxy object passed to the property system to delay load
//              Selector.SelectedIndex values.
//
 
using System.Windows.Controls.Primitives;
 
namespace System.Windows.Controls
{
    // Proxy object passed to the property system to delay load Selector.SelectedIndex
    // values.
    internal class DeferredSelectedIndexReference : DeferredReference
    {
        //------------------------------------------------------
        //
        //  Constructors
        //
        //------------------------------------------------------
 
        #region Constructors
 
        internal DeferredSelectedIndexReference(Selector selector)
        {
            _selector = selector;
        }
 
        #endregion Constructors
 
        //------------------------------------------------------
        //
        //  Internal Methods
        //
        //------------------------------------------------------
 
        #region Internal Methods
 
        // Does the real work to calculate the current SelectedIndexProperty value.
        internal override object GetValue(BaseValueSourceInternal valueSource)
        {
            return _selector.InternalSelectedIndex;
        }
        
        // Gets the type of the value it represents
        internal override Type GetValueType()
        {
            return typeof(int);
        }
 
        #endregion Internal Methods
 
        //------------------------------------------------------
        //
        //  Private Fields
        //
        //------------------------------------------------------
 
        #region Private Fields
 
        // Selector mapped to this object.
        private readonly Selector _selector;
 
        #endregion Private Fields
     }
}