Infinitely rotate rectangle in XAML - wpf

Question

How to define XAML to rotate a rectangle infinitely?
So far I found a solution with code but no xaml:
http://www.codeproject.com/Articles/23257/Beginner-s-WPF-Animation-Tutorial
which I use like this:
private void Window_Loaded_1(object sender, RoutedEventArgs e)
{
var doubleAnimation = new DoubleAnimation(360, 0, new Duration(TimeSpan.FromSeconds(1)));
var rotateTransform = new RotateTransform();
rect1.RenderTransform = rotateTransform;
rect1.RenderTransformOrigin = new Point(0.5, 0.5);
doubleAnimation.RepeatBehavior = RepeatBehavior.Forever;
rotateTransform.BeginAnimation(RotateTransform.AngleProperty, doubleAnimation);
}
But how can I achieve this with XAML only?

Answer 1

Something like this
<Rectangle x:Name="rect1" RenderTransformOrigin="0.5, 0.5">
<Rectangle.RenderTransform>
<!-- giving the transform a name tells the framework not to freeze it -->
<RotateTransform x:Name="noFreeze" />
</Rectangle.RenderTransform>
<Rectangle.Triggers>
<EventTrigger RoutedEvent="Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetProperty="(Rectangle.RenderTransform).(RotateTransform.Angle)"
To="-360" Duration="0:0:1" RepeatBehavior="Forever" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Rectangle.Triggers>
</Rectangle>
Of course you can remove Loaded trigger and run this storyboard whenever you want.