在XAML中设置WPF动画Storyboard的目标

Question

我目前有一组按钮，我想设置触发器，以便每个按钮执行相同的动画。在XAML中，是否有一种方法可以“传递”目标到Storyboard，以便我不必为每个目标重写Storyboard？

- jwarzech

Answer 1

如果您没有设置明确的目标，则目标应该是应用动画的元素。我会定义一个具有触发器/动画的样式，并将该样式应用于想要展示此行为的特定按钮。例如：

<Style x:Key="MyButtonStyle" TargetType="{x:Type Button}">
    <Style.Resources>
        <Storyboard x:Key="OnMouseEnterStoryboard">
            <DoubleAnimation BeginTime="00:00:00" Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)" To="180" />
        </Storyboard>
        <Storyboard x:Key="OnMouseLeaveStoryboard">
            <DoubleAnimation BeginTime="00:00:00" Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)" To="0" />
        </Storyboard>
    </Style.Resources>
    <Style.Triggers>
        <EventTrigger RoutedEvent="Mouse.MouseLeave">
            <RemoveStoryboard BeginStoryboardName="OnMouseEnterStoryboard_BeginStoryboard"/>
            <BeginStoryboard x:Name="OnMouseLeaveStoryboard_BeginStoryboard" Storyboard="{StaticResource OnMouseLeaveStoryboard}"/>
        </EventTrigger>
        <EventTrigger RoutedEvent="Mouse.MouseEnter">
            <BeginStoryboard x:Name="OnMouseEnterStoryboard_BeginStoryboard" Storyboard="{StaticResource OnMouseEnterStoryboard}"/>
            <RemoveStoryboard BeginStoryboardName="OnMouseLeaveStoryboard_BeginStoryboard"/>
        </EventTrigger>
    </Style.Triggers>
    <Setter Property="RenderTransformOrigin" Value="0.5,0.5"/>
    <Setter Property="RenderTransform">
        <Setter.Value>
            <RotateTransform/>
        </Setter.Value>
    </Setter>
</Style>

然后在每个按钮上，您希望它以这种方式起作用：

<Button Style="{StaticResource MyButtonStyle}" ... />

- Drew Marsh

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太棒了！我刚开始学习WPF，没想到可以使用相关的触发器和动画来应用样式。谢谢你的帮助！ - jwarzech