public DownloadsIndicator()
{
DefaultStyleKey = typeof(DownloadsIndicator);
var compositor = Window.Current.Compositor;
var source = new Downloading();
var visual = source.TryCreateAnimatedVisual(compositor, out _);
if (visual == null)
{
return;
}
_visual = visual;
_visual.RootVisual.Scale = new System.Numerics.Vector3(0.1f, 0.1f, 1);
_visualSource = source;
ThemeChanged();
var linearEasing = compositor.CreateLinearEasingFunction();
_animation = compositor.CreateScalarKeyFrameAnimation();
_animation.Duration = visual.Duration;
_animation.InsertKeyFrame(1, 60f / 90f, linearEasing);
//animation.IterationBehavior = AnimationIterationBehavior.Forever;
_properties = compositor.CreatePropertySet();
_properties.InsertScalar("Progress", 30f / 90f);
var progressAnimation = compositor.CreateExpressionAnimation("_.Progress");
progressAnimation.SetReferenceParameter("_", _properties);
visual.RootVisual.Properties.InsertScalar("Progress", 0.0F);
visual.RootVisual.Properties.StartAnimation("Progress", progressAnimation);
ActualThemeChanged += OnActualThemeChanged;
}