// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
//
//
// This file was generated, please do not edit it directly.
//
// Please see MilCodeGen.html for more information.
//
 
using System.Windows.Media.Composition;
 
namespace System.Windows.Media.Animation
{
    /// <summary>
    /// SizeAnimationClockResource class.
    /// AnimationClockResource classes refer to an AnimationClock and a base
    /// value.  They implement DUCE.IResource, and thus can be used to produce
    /// a render-side resource which represents the current value of this
    /// AnimationClock.
    /// They subscribe to the Changed event on the AnimationClock and ensure
    /// that the resource's current value is up to date.
    /// </summary>
    internal class SizeAnimationClockResource: AnimationClockResource, DUCE.IResource
    {
        /// <summary>
        /// Constructor for public SizeAnimationClockResource.
        /// This constructor accepts the base value and AnimationClock.
        /// Note that since there is no current requirement that we be able to set or replace either the
        /// base value or the AnimationClock, this is the only way to initialize an instance of
        /// SizeAnimationClockResource.
        /// Also, we currently Assert that the resource is non-null, since without mutability
        /// such a resource isn't needed.
        /// We can easily extend this class if/when new requirements arise.
        /// </summary>
        /// <param name="baseValue"> Size - The base value. </param>
        /// <param name="animationClock"> AnimationClock - cannot be null. </param>
        public SizeAnimationClockResource(
            Size baseValue,
            AnimationClock animationClock
            ): base( animationClock )
        {
            _baseValue = baseValue;
        }
 
        #region Public Properties
 
        /// <summary>
        /// BaseValue Property - typed accessor for BaseValue.
        /// </summary>
        public Size BaseValue
        {
            get
            {
                return _baseValue;
            }
        }
 
        /// <summary>
        /// CurrentValue Property - typed accessor for CurrentValue
        /// </summary>
        public Size CurrentValue
        {
            get
            {
                if (_animationClock != null)
                {
                    // No handoff for DrawingContext animations so we use the
                    // BaseValue as the defaultOriginValue and the
                    // defaultDestinationValue.  We call the Timeline's GetCurrentValue
                    // directly to avoid boxing
                    return ((SizeAnimationBase)(_animationClock.Timeline)).GetCurrentValue(
                        _baseValue,  // defaultOriginValue
                        _baseValue,  // defaultDesinationValue
                        _animationClock); // clock
                }
                else
                {
                    return _baseValue;
                }
            }
        }
 
        #endregion Public Properties
 
        #region DUCE
 
        //
        // Method which returns the DUCE type of this class.
        // The base class needs this type when calling CreateOrAddRefOnChannel.
        // By providing this via a virtual, we avoid a per-instance storage cost.
        //
        protected override DUCE.ResourceType ResourceType
        {
            get
            {
                 return DUCE.ResourceType.TYPE_SIZERESOURCE;
            }
        }
 
        /// <summary>
        /// UpdateResource - This method is called to update the render-thread
        /// resource on a given channel.
        /// </summary>
        /// <param name="handle"> The DUCE.ResourceHandle for this resource on this channel. </param>
        /// <param name="channel"> The channel on which to update the render-thread resource. </param>
        protected override void UpdateResource(
            DUCE.ResourceHandle handle,
            DUCE.Channel channel)
        {
            DUCE.MILCMD_SIZERESOURCE cmd = new DUCE.MILCMD_SIZERESOURCE
            {
                Type = MILCMD.MilCmdSizeResource,
                Handle = handle,
                Value = CurrentValue
            };
 
            unsafe
            {
                channel.SendCommand(
                    (byte*)&cmd,
                    sizeof(DUCE.MILCMD_SIZERESOURCE));
            }
 
            // Validate this resource
            IsResourceInvalid = false;
        }
 
        #endregion DUCE
 
        private Size _baseValue;
    }
}