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/***************************************************************************\
*
* File: SetStoryboardSpeedRatio.cs
*
* This object includes a Storyboard reference. When triggered, the Storyboard
* speed ratio is set to the given parameter.
*
* Copyright (C) by Microsoft Corporation. All rights reserved.
*
\***************************************************************************/
using System.ComponentModel; // DefaultValueAttribute
using System.Diagnostics; // Debug.Assert
namespace System.Windows.Media.Animation
{
/// <summary>
/// SetStoryboardSpeedRatio will set the speed for its Storyboard reference when
/// it is triggered.
/// </summary>
public sealed class SetStoryboardSpeedRatio : ControllableStoryboardAction
{
/// <summary>
/// A speed ratio to use for this action. If it is never explicitly
/// specified, it is 1.0.
/// </summary>
[DefaultValue(1.0)]
public double SpeedRatio
{
get
{
return _speedRatio;
}
set
{
if (IsSealed)
{
throw new InvalidOperationException(SR.Get(SRID.CannotChangeAfterSealed, "SetStoryboardSpeedRatio"));
}
_speedRatio = value;
}
}
/// <summary>
/// Called when it's time to execute this storyboard action
/// </summary>
internal override void Invoke( FrameworkElement containingFE, FrameworkContentElement containingFCE, Storyboard storyboard )
{
Debug.Assert( containingFE != null || containingFCE != null,
"Caller of internal function failed to verify that we have a FE or FCE - we have neither." );
if( containingFE != null )
{
storyboard.SetSpeedRatio(containingFE, SpeedRatio);
}
else
{
storyboard.SetSpeedRatio(containingFCE, SpeedRatio);
}
}
double _speedRatio = 1.0;
}
}
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