protected override void OnApplyTemplate()
{
Indicator = (ProgressBarRingSlice)GetTemplateChild("Indicator");
Rotation = (RotateTransform)GetTemplateChild("Rotation");
if (Indicator != null)
{
OnApplyLegacyTemplate();
}
else if (ApiInfo.CanUseDirectComposition)
{
var ellipse = Window.Current.Compositor.CreateEllipseGeometry();
ellipse.Radius = new Vector2(21);
ellipse.Center = new Vector2(24);
ellipse.TrimEnd = 0f;
var shape = Window.Current.Compositor.CreateSpriteShape(ellipse);
shape.CenterPoint = new Vector2(24);
shape.StrokeThickness = 2;
shape.StrokeBrush = Window.Current.Compositor.CreateColorBrush(Windows.UI.Colors.Red);
shape.StrokeStartCap = CompositionStrokeCap.Round;
shape.StrokeEndCap = CompositionStrokeCap.Round;
var visual = Window.Current.Compositor.CreateShapeVisual();
visual.Shapes.Add(shape);
visual.Size = new Vector2(48);
visual.CenterPoint = new Vector3(24);
var easing = Window.Current.Compositor.CreateLinearEasingFunction();
var forever = Window.Current.Compositor.CreateScalarKeyFrameAnimation();
forever.InsertKeyFrame(1, 360, easing);
forever.IterationBehavior = AnimationIterationBehavior.Forever;
forever.Duration = TimeSpan.FromSeconds(3);
var trimEnd = Window.Current.Compositor.CreateScalarKeyFrameAnimation();
trimEnd.Target = nameof(CompositionGeometry.TrimEnd);
trimEnd.InsertExpressionKeyFrame(1.0f, "this.FinalValue", Window.Current.Compositor.CreateLinearEasingFunction());
var visibility = Window.Current.Compositor.CreateExpressionAnimation("target.TrimEnd < 1");
visibility.SetReferenceParameter("target", ellipse);
var animations = Window.Current.Compositor.CreateImplicitAnimationCollection();
animations[nameof(CompositionGeometry.TrimEnd)] = trimEnd;
ellipse.ImplicitAnimations = animations;
visual.StartAnimation("IsVisible", visibility);
visual.StartAnimation("RotationAngleInDegrees", forever);
_ellipse = ellipse;
ElementCompositionPreview.SetElementChildVisual(this, visual);
}
}
protected override void OnApplyTemplate()
{
Visibility = Windows.UI.Xaml.Visibility.Collapsed;
Indicator = (ProgressBarRingSlice)GetTemplateChild("Indicator");
Rotation = (RotateTransform)GetTemplateChild("Rotation");
if (Rotation != null)
{
_foreverStoryboard = new Storyboard();
_foreverStoryboard.RepeatBehavior = RepeatBehavior.Forever;
var rotationAnimation = new DoubleAnimation();
rotationAnimation.From = 0;
rotationAnimation.To = 360;
rotationAnimation.Duration = TimeSpan.FromSeconds(3.0);
Storyboard.SetTarget(rotationAnimation, Rotation);
Storyboard.SetTargetProperty(rotationAnimation, "(RotateTransform.Angle)");
_foreverStoryboard.Children.Add(rotationAnimation);
_foreverStoryboard.Completed += OnForeverStoryboardCompleted;
_angleStoryboard = new Storyboard();
var angleAnimation = new DoubleAnimation();
angleAnimation.Duration = TimeSpan.FromSeconds(0.25);
angleAnimation.EnableDependentAnimation = true;
Storyboard.SetTarget(angleAnimation, Indicator);
Storyboard.SetTargetProperty(angleAnimation, "EndAngle");
_angleStoryboard.Children.Add(angleAnimation);
_angleStoryboard.Completed += OnAngleStoryboardCompleted;
Loaded += (s, args) =>
{
_foreverStoryboard.RepeatBehavior = RepeatBehavior.Forever;
_foreverStoryboard.Begin();
};
Unloaded += (s, args) =>
{
_foreverStoryboard.RepeatBehavior = new RepeatBehavior(1);
_foreverStoryboard.Stop();
};
}
else
{
Indicator.EndAngle = 359;
}
OnValueChanged(0, Value);
}
protected override void OnApplyTemplate()
{
Visibility = Windows.UI.Xaml.Visibility.Collapsed;
Indicator = (ProgressBarRingSlice)GetTemplateChild("Indicator");
Indicator.EndAngle = 359;
_angleStoryboard = new Storyboard();
var angleAnimation = new DoubleAnimation();
angleAnimation.Duration = TimeSpan.FromSeconds(0.25);
angleAnimation.EnableDependentAnimation = true;
Storyboard.SetTarget(angleAnimation, Indicator);
Storyboard.SetTargetProperty(angleAnimation, "StartAngle");
_angleStoryboard.Children.Add(angleAnimation);
_angleStoryboard.Completed += OnAngleStoryboardCompleted;
OnValueChanged(Value);
}
