我尝试在UWP应用程序中编写Android效果(涟漪).所以我在网格中创建了一个EllipseGeometry(在我的usercontrol中)但是当我的ellipseGeometry的RadiusX和RadiusY播放他们的动画时,我的EllipseGeometry从我的网格中增长…
我试图用可见区域限制路径并将其剪辑到路径,但没有成功.

这是我的XAML代码：

<UserControl
x:Class="UIComponents.POIButton"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:UIComponents"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="100"
d:DesignWidth="650" Background="White">
<Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Background="Gray">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="100"/>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="100"/>
    </Grid.ColumnDefinitions>
    <!--Animation Ellipse-->
    <Grid x:Name="ellipseContainer" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Grid.Column="0" Grid.ColumnSpan="3">
        <Path x:Name="path" Fill="Red" Stroke="Black" StrokeThickness="1" HorizontalAlignment="Center" VerticalAlignment="Center" RenderTransformOrigin="0.5,0.5">
            <Path.Data>
                <EllipseGeometry x:Name="circleGeometry" Center="0,0" RadiusX="5" RadiusY="5" />
            </Path.Data>
        </Path>
    </Grid>
    <Rectangle x:Name="clickableRect" Grid.Column="0" Grid.ColumnSpan="3" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"  PointerPressed="clickableRect_PointerPressed"  Fill="Transparent" Tapped="clickableRect_Tapped"/>
</Grid>
<UserControl.Resources>
    <Storyboard x:Name="RipplePath">
        <DoubleAnimationUsingKeyFrames EnableDependentAnimation="True" Storyboard.TargetProperty="RadiusX" Storyboard.TargetName="circleGeometry">
            <EasingDoubleKeyFrame KeyTime="0" Value="5"/>
            <EasingDoubleKeyFrame KeyTime="0:0:10" Value="200"/>
        </DoubleAnimationUsingKeyFrames>
        <DoubleAnimationUsingKeyFrames EnableDependentAnimation="True" Storyboard.TargetProperty="RadiusY" Storyboard.TargetName="circleGeometry">
            <EasingDoubleKeyFrame KeyTime="0" Value="5"/>
            <EasingDoubleKeyFrame KeyTime="0:0:10" Value="200"/>
        </DoubleAnimationUsingKeyFrames>
    </Storyboard>
</UserControl.Resources>

这是我的Cs代码：

private void clickableRect_Tapped(object sender, TappedRoutedEventArgs e)
    {
        Point touchPosition = e.GetPosition(ellipseContainer);
        //RectangleGeometry visibleArea = new RectangleGeometry();
        //visibleArea.Rect = new Rect(0, 0, 650, 100);
        //path.Clip = visibleArea;
        Storyboard animation = this.FindName("RipplePath") as Storyboard;
        animation.Begin();

    }

在这里,结果如下：

非常感谢你的帮助 ：)

==============尝试Justin XL的解决方案：结果：

感谢Justin的帮助,看起来矩形几何学也是如此：

但没有任何东西在网格上.

Xaml代码是：

<UserControl
x:Class="UIComponents.POIButton"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:UIComponents"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="100"
d:DesignWidth="650" Background="White">
<Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Background="Gray">
    <Grid.Clip>
        <RectangleGeometry Rect="0,0,650,100" />
    </Grid.Clip> ...

和CS代码是：

public POIButton()
    {
        this.InitializeComponent();
        var visual = ElementCompositionPreview.GetElementVisual(this);
        visual.Clip = visual.Compositor.CreateInsetClip();
    }

================ XAML结果：

此XAML代码不会产生正确的效果：

<UserControl
x:Class="UIComponents.POIButton"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:UIComponents"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Height="100"
Width="650" Background="White">
<Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Background="Gray">
    <Grid.Clip>
        <RectangleGeometry Rect="0,0,650,100" />
    </Grid.Clip>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="100"/>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="100"/>
    </Grid.ColumnDefinitions>
    <!--Animation Ellipse-->
    <Grid x:Name="ellipseContainer" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Grid.Column="0" Grid.ColumnSpan="3">
        <Path x:Name="path" Fill="Red" Stroke="Black" StrokeThickness="1" HorizontalAlignment="Center" VerticalAlignment="Center" RenderTransformOrigin="0.5,0.5">
            <Path.Data>
                <EllipseGeometry x:Name="circleGeometry" Center="0,0" RadiusX="5" RadiusY="5" />
            </Path.Data>
        </Path>
    </Grid>...

结果：

但CS Code工作正常(在XAML代码中注释行RectangleGeometry)：

this.InitializeComponent();
        var visual = ElementCompositionPreview.GetElementVisual(this);
        visual.Clip = visual.Compositor.CreateInsetClip();

产生这个：

谢谢@Justin XL的帮助:)

解决方法:

您只需要将控件剪切到其边界之外.这可以通过使用来实现

<Grid x:Name="Root" HorizontalAlignment="Stretch"
      VerticalAlignment="Stretch"
      Background="Gray">
    <Grid.Clip>
        <RectangleGeometry Rect="0,0,200,80" />
    </Grid.Clip>

在您的XAML中(200是宽度,80是高度),或

public POIButton()
{
    InitializeComponent();

    var visual = ElementCompositionPreview.GetElementVisual(this);
    visual.Clip = visual.Compositor.CreateInsetClip();
}

在使用新的Composition API进行代码隐藏.请注意,使用XAML方法,如果控件的大小发生更改,则需要通过绑定或代码隐藏手动更新宽度和高度,而不是使用Composition.

另外,我注意到你使用了在UI线程上运行的路径动画(例如EnableDependentAnimation).这可以用带有ScaleTransform动画的Ellipse代替,这通常是推荐的方法,因为它具有更好的性能.

XamlLight带来“波纹”效应

由于您正在为UWP开发,因此重要的是要认识到平台可以做什么,以及UWP实现类似效果的方式,同时仍然尊重自己的Fluent设计系统.

我在15063中引入了一个新的XamlLight类,创建了下面的FluentButton控件,如下所示.你会注意到灯光跟随你的鼠标光标,点击/点击时会发出涟漪声.

第二部分由定制的XamlLight完成,我称之为RippleXamlLight,这就是它的实现方式 –

首先,创建一个继承自XamlLight的类.

public class RippleXamlLight : XamlLight

然后,在其OnConnected覆盖方法中,创建一个SpotLight实例和一个Vector3动画,该动画将用于为灯光的偏移设置动画.它还将负责订阅诸如PointerPressed之类的指针事件.

protected override void OnConnected(UIElement newElement)
{
    _compositor = Window.Current.Compositor;

    var spotLight = CreateSpotLight();
    CompositionLight = spotLight;

    _lightRippleOffsetAnimation = CreateLightRippleOffsetAnimation();

    SubscribeToPointerEvents();

    AddTargetElement(GetId(), newElement);

    ...
    }
}

最后,每当按下控件时启动动画. Offset值由指针位置和_rippleOffsetZ提供,_rippleOffsetZ是根据控件的大小计算的.

private void OnPointerPressed(object sender, PointerRoutedEventArgs e) =>
    StartLightRippleOffsetAnimation(e.GetCurrentPoint((UIElement)sender).Position.ToVector2());

private void StartLightRippleOffsetAnimation(Vector2 position)
{
    var startingPoisition = new Vector3(position, 0.0f);
    _lightRippleOffsetAnimation?.InsertKeyFrame(0.0f, startingPoisition);
    _lightRippleOffsetAnimation?.InsertKeyFrame(1.0f, new Vector3(position.X, position.Y, _rippleOffsetZ));

    CompositionLight?.StartAnimation("Offset", _lightRippleOffsetAnimation);
}

如果我没有清楚地解释清楚,这里是full source供您参考.