void UpdateAnimation()
{
if (_pivot.SelectedIndex == -1)
{
return;
}
var SelectionItem = _pivot.ContainerFromIndex(_pivot.SelectedIndex) as PivotItem;
if (SelectionItem == null)
{
return;
}
var _scrollviewer = FindFirstChild <ScrollViewer>(SelectionItem);
if (_scrollviewer != null)
{
_headerVisual = ElementCompositionPreview.GetElementVisual(_header);
var _manipulationPropertySet = ElementCompositionPreview.GetScrollViewerManipulationPropertySet(_scrollviewer);
var _compositor = Window.Current.Compositor;
var line = _compositor.CreateCubicBezierEasingFunction(new System.Numerics.Vector2(0, 0), new System.Numerics.Vector2(0.6f, 1));
var MoveHeaderAnimation = _compositor.CreateScalarKeyFrameAnimation();
MoveHeaderAnimation.InsertExpressionKeyFrame(0f, "_headerVisual.Offset.Y", line);
MoveHeaderAnimation.InsertExpressionKeyFrame(1f, "_manipulationPropertySet.Translation.Y > -100f ? _manipulationPropertySet.Translation.Y: -100f", line);
MoveHeaderAnimation.SetReferenceParameter("_headerVisual", _headerVisual);
MoveHeaderAnimation.SetReferenceParameter("_manipulationPropertySet", _manipulationPropertySet);
MoveHeaderAnimation.DelayTime = TimeSpan.FromSeconds(0.18d);
MoveHeaderAnimation.Duration = TimeSpan.FromSeconds(0.1d);
var Betch = _compositor.CreateScopedBatch(Windows.UI.Composition.CompositionBatchTypes.Animation);
_headerVisual.StartAnimation("Offset.Y", MoveHeaderAnimation);
Betch.Completed += (s, a) =>
{
//var _headerAnimation = _compositor.CreateExpressionAnimation("_manipulationPropertySet.Translation.Y > -100f ? (_manipulationPropertySet.Translation.Y == 0?This.CurrentValue :_manipulationPropertySet.Translation.Y) : -100f");
var _headerAnimation = _compositor.CreateExpressionAnimation("Clamp(_manipulationPropertySet.Translation.Y,-100f,_manipulationPropertySet.Translation.Y == 0?This.CurrentValue : 0f)");
//_manipulationPropertySet.Translation.Y是ScrollViewer滚动的数值，手指向上移动的时候，也就是可视部分向下移动的时候，Translation.Y是负数。
_headerAnimation.SetReferenceParameter("_manipulationPropertySet", _manipulationPropertySet);
_headerVisual.StartAnimation("Offset.Y", _headerAnimation);
};
Betch.End();
}
else
{
SelectionItem.Loaded += (s, a) =>
{
UpdateAnimation();
}
};
}
private void Accept_Click(object sender, RoutedEventArgs e)
{
Windows.UI.Composition.Visual visual =
Windows.UI.Xaml.Hosting.ElementCompositionPreview.GetElementVisual(Logo);
pointLight = Compositor.CreatePointLight();
pointLight.Color = Windows.UI.Colors.White;
pointLight.CoordinateSpace = visual;
pointLight.Targets.Add(visual);
pointLight.Offset =
new System.Numerics.Vector3(-(float)Logo.ActualWidth * 2, (float)Logo.ActualHeight / 2, (float)Logo.ActualHeight);
Windows.UI.Composition.ScalarKeyFrameAnimation animation = Compositor.CreateScalarKeyFrameAnimation();
animation.InsertKeyFrame(1, 2 * (float)Logo.ActualWidth);
animation.Duration = TimeSpan.FromSeconds(5.0f);
animation.IterationBehavior = Windows.UI.Composition.AnimationIterationBehavior.Forever;
pointLight.StartAnimation("Offset.X", animation);
}
public CompositionRenderTarget(EglPlatformOpenGlInterface egl,
Windows.UI.Composition.Visual compositionVisual,
ICompositionDrawingSurfaceInterop interopSurface,
IEglWindowGlPlatformSurfaceInfo info)
: base(egl)
{
_egl = egl;
_surfaceInterop = interopSurface;
_info = info;
_currentSize = info.Size;
_compositionVisual = compositionVisual;
using (_egl.PrimaryContext.MakeCurrent())
{
_surfaceInterop.Resize(new POINT {
X = _info.Size.Width, Y = _info.Size.Height
});
}
_compositionVisual.Size = new System.Numerics.Vector2(_info.Size.Width, _info.Size.Height);
}
public CompositionBlurHost(Windows.UI.Composition.Visual blurVisual)
{
_blurVisual = blurVisual;
}
