Silverlight Toolkit for Windows Phone に含まれる TurnstileTransition の回転の基準点がシステムと違い左端ぴったりで違和感があるのを補正

TurnstileTransition.cs

using System.Windows;
using System.Windows.Data;
using System.Windows.Media;
using Controls = Microsoft.Phone.Controls;

namespace Linearstar.Lavis.Presentation
{
	public class TurnstileTransition : Controls.TransitionElement
	{
		Controls.TurnstileTransition inner = new Controls.TurnstileTransition();
		public static readonly DependencyProperty ModeProperty = DependencyProperty.Register("Mode", typeof(Controls.TurnstileTransitionMode), typeof(TurnstileTransition), new PropertyMetadata(Controls.TurnstileTransitionMode.ForwardIn));

		public Controls.TurnstileTransitionMode Mode
		{
			get
			{
				return (Controls.TurnstileTransitionMode)GetValue(ModeProperty);
			}
			set
			{
				SetValue(ModeProperty, value);
			}
		}

		public TurnstileTransition()
		{
			BindingOperations.SetBinding(inner, Controls.TurnstileTransition.ModeProperty, new Binding("Mode")
			{
				Source = this,
			});
		}

		public override Controls.ITransition GetTransition(UIElement element)
		{
			var rt = inner.GetTransition(element);

			((PlaneProjection)element.Projection).CenterOfRotationX = -0.1;

			return rt;
		}
	}
}