LayerVisual.Shadow 属性

定义

命名空间:

Windows.UI.Composition

获取或设置要应用于 LayerVisual 子级的平展表示形式的阴影。

public:
 property CompositionShadow ^ Shadow { CompositionShadow ^ get(); void set(CompositionShadow ^ value); };

CompositionShadow Shadow();

void Shadow(CompositionShadow value);

public CompositionShadow Shadow { get; set; }

var compositionShadow = layerVisual.shadow;
layerVisual.shadow = compositionShadow;

Public Property Shadow As CompositionShadow

属性值

CompositionShadow

要应用于 LayerVisual 子级的平展表示形式的阴影。

Windows 要求

设备系列	Windows 10 Fall Creators Update (在 10.0.16299.0 中引入)
API contract	Windows.Foundation.UniversalApiContract (在 v5.0 中引入)

示例

此示例演示如何将 DropShadow 应用于 LayerVisual。

private async void InitComposition()
{
  Compositor compositor = ElementCompositionPreview.GetElementVisual(MyGrid).Compositor;

  //Create LayerVisual
  LayerVisual layerVisual = compositor.CreateLayerVisual();
  layerVisual.Size = new Vector2(900, 900);

  //Create SpriteVisuals to use as LayerVisual child
  SpriteVisual sv1 = compositor.CreateSpriteVisual();
  sv1.Brush = compositor.CreateColorBrush(Windows.UI.Colors.Blue);
  sv1.Size = new Vector2(300, 300);
  sv1.Offset = new Vector3(200, 200, 0);

  SpriteVisual sv2 = compositor.CreateSpriteVisual();
  sv2.Brush = compositor.CreateColorBrush(Colors.Red);
  sv2.Size = new Vector2(300, 300);
  sv2.Offset = new Vector3(400, 400, 0);

  //Add children to the LayerVisual
  layerVisual.Children.InsertAtTop(sv1);
  layerVisual.Children.InsertAtTop(sv2);

  //Create DropShadow
  DropShadow shadow = compositor.CreateDropShadow();
  shadow.Color = Colors.DarkSlateGray;
  shadow.Offset = new Vector3(40, 40, 0);
  shadow.BlurRadius = 9;
  shadow.SourcePolicy = CompositionDropShadowSourcePolicy.InheritFromVisualContent;

  //Associate Shadow with LayerVisual
  layerVisual.Shadow = shadow;

  ElementCompositionPreview.SetElementChildVisual(MyGrid, layerVisual);
}         

结果如下所示。