visual state manager helper

StateHelper

{
    /// <summary>
    /// Copied from http://stackoverflow.com/questions/6002046/binding-visualstatemanager-view-state-to-a-mvvm-viewmodel
    /// </summary>
    public class StateHelper : DependencyObject
    {
        public static readonly DependencyProperty StateProperty = DependencyProperty.RegisterAttached(
            "State", typeof(String), typeof(StateHelper), new PropertyMetadata("Normal", StateChanged));


        internal static void StateChanged(DependencyObject target, DependencyPropertyChangedEventArgs args)
        {
            string newState = (string)args.NewValue;
            if (args.NewValue != null)
            {
                bool res = VisualStateManager.GoToElementState((FrameworkElement)target, newState, true);
            }
        }

        public static void SetState(DependencyObject obj, string value)
        {
            obj.SetValue(StateProperty, value);
        }

        public static string GetState(DependencyObject obj)
        {
            return (string)obj.GetValue(StateProperty);
        }
    }
}


        <Border x:Name="ellipse" local:StateHelper.State="{Binding Path=State}"
                HorizontalAlignment="Left" Height="116" Margin="74,43,0,0"
                VerticalAlignment="Top" Width="122" RenderTransformOrigin="0.5,0.5">
        	<Border.RenderTransform>
        		<TransformGroup>
        			<ScaleTransform/>
        			<SkewTransform/>
        			<RotateTransform/>
        			<TranslateTransform/>
        		</TransformGroup>
        	</Border.RenderTransform>
            <VisualStateManager.VisualStateGroups>
                <VisualStateGroup>
                    <VisualState x:Name="Full">
                        <Storyboard>
                            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)">
                                <EasingDoubleKeyFrame KeyTime="0:0:1" Value="127"/>
                            </DoubleAnimationUsingKeyFrames>
                        </Storyboard>
                    </VisualState>
                </VisualStateGroup>
            </VisualStateManager.VisualStateGroups>
            <Border.Background>
                <SolidColorBrush x:Name="brush" Color="Black" />
            </Border.Background>

        </Border>