我有一个使用以下样式的带有边框的 WPF 项目。计划是让发光效果在鼠标移过边框时淡入,并在鼠标离开时淡出。
<Style x:Key="BorderGlow" TargetType="Border">
<Style.Resources>
<Storyboard x:Key="GlowOn">
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetProperty="(DropShadowEffect.Opacity)">
<SplineDoubleKeyFrame KeyTime="0:0:0.3" Value="1"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="GlowOff">
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetProperty="(DropShadowEffect.Opacity)">
<SplineDoubleKeyFrame KeyTime="0:0:0.3" Value="0"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</Style.Resources>
<Setter Property="CornerRadius" Value="6,1,6,1" />
<Setter Property="BorderBrush" Value="{StaticResource SelectedBorder}" />
<Setter Property="BorderThickness" Value="1" />
<Setter Property="Background" Value="{StaticResource DeselectedBackground}" />
<Setter Property="RenderTransformOrigin" Value="0.5,0.5" />
<Setter Property="TextBlock.Foreground" Value="{StaticResource SelectedForeground}" />
<Setter Property="RenderTransform">
<Setter.Value>
<RotateTransform Angle="90"/>
</Setter.Value>
</Setter>
<Setter Property="Effect">
<Setter.Value>
<DropShadowEffect ShadowDepth="0" BlurRadius="8" Color="#FFB0E9EF"/>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Trigger.EnterActions>
<BeginStoryboard Storyboard="{StaticResource GlowOn}"/>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard Storyboard="{StaticResource GlowOff}"/>
</Trigger.ExitActions>
</Trigger>
</Style.Triggers>
</Style>
问题是,什么都没有发生!如果我在 Storyboard TargetProperty 中将“DropShadowEffect”更改为“UIElement”,则动画会起作用,但这会使整个控件褪色。
如何仅淡化 DropShadowEffect?