c# - WPF:在角度动画之前更改 RotateTransform 中心

我想为我的用户控件旋转动画，当控件获得键盘焦点时将触发该动画。动画应围绕其中心旋转。
问题是，我在控件的左下角为加载的动画设置了原始中心点。所以，为了纠正这个问题，我将中心设置在触发器 IsFocused 上的控件中间。
但是我的 GetKeyboardFocus 动画保持原来的中心。
触发器是否在 eventtrigger 之后执行？或者我做错了什么。

<UserControl x:Class="testtuile.rectangle"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         mc:Ignorable="d"
         d:DesignHeight="300" d:DesignWidth="300" Height="150" Width="300" Padding="4" Focusable="True" MouseDown="UserControl_MouseDown" IsTabStop="True">
<UserControl.RenderTransform>
    <RotateTransform Angle="0" CenterX="0" CenterY="150"></RotateTransform>
</UserControl.RenderTransform>
<UserControl.Style>
    <Style>
        <Style.Triggers>
            <Trigger Property="Control.IsFocused" Value="True">
                <Setter Property="Control.BorderBrush" Value="Gold"></Setter>
                <Setter Property="Control.BorderThickness" Value="2"></Setter>
                <Setter Property="Control.RenderTransform">
                    <Setter.Value>
                        <RotateTransform CenterX="150" CenterY="75"/>
                    </Setter.Value>
                </Setter>
            </Trigger>
        </Style.Triggers>
    </Style>
</UserControl.Style>
<UserControl.Triggers>
    <EventTrigger RoutedEvent="Loaded">
        <EventTrigger.Actions>
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation
                        Storyboard.TargetProperty="(RenderTransform).(RotateTransform.Angle)"
                        From="90" To="0" Duration="0:0:0.8"
                        AutoReverse="False"
                    />
                    <DoubleAnimation
                        Storyboard.TargetProperty="Opacity"
                        From="0" Duration="0:0:0.6"
                        AutoReverse="False"
                    />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger.Actions>
    </EventTrigger>
    <EventTrigger RoutedEvent="GotKeyboardFocus">
        <EventTrigger.Actions>
            <BeginStoryboard Name="ButtonFocusedAnimation">
                <Storyboard>

                    <DoubleAnimation
                        Storyboard.TargetProperty="(RenderTransform).(RotateTransform.Angle)"
                        From="-2" To="2" Duration="0:0:1"
                        AutoReverse="True" RepeatBehavior="Forever"
                    />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger.Actions>
    </EventTrigger>
    <EventTrigger RoutedEvent="LostKeyboardFocus">
        <StopStoryboard BeginStoryboardName="ButtonFocusedAnimation" />
    </EventTrigger>
</UserControl.Triggers>

<Grid Background="Aquamarine">


</Grid>

感谢您的帮助。

最佳答案

您不必在动画之前更改它。要根据 UIElement.RenderTransformOrigin 旋转圆心点集 UserControl :

<UserControl RenderTransformOrigin="0.5,0.5" ...>

然后

关于c# - WPF:在角度动画之前更改 RotateTransform 中心，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/22811651/