从外部用户控件动画元素 [英] Animate UserControl Elements from Outside

问题描述

我有一个实现了以下的动画自定义的用户控件：

I have a custom UserControl which implements the following animations:

<UserControl.Resources>
    <QuinticEase Core:Key="EasingInOut" EasingMode="EaseInOut"/>
    <Storyboard Core:Key="AnimationHide">
        <DoubleAnimation Storyboard.TargetName="m_Front" Storyboard.TargetProperty="RenderTransform.(ScaleTransform.ScaleX)" BeginTime="00:00:00.0" Duration="00:00:00.1" EasingFunction="{StaticResource EasingInOut}" To="0"/>
        <DoubleAnimation Storyboard.TargetName="m_Back" Storyboard.TargetProperty="RenderTransform.(ScaleTransform.ScaleX)" BeginTime="00:00:00.1" Duration="00:00:00.1" EasingFunction="{StaticResource EasingInOut}" To="1"/>
    </Storyboard>
    <Storyboard Core:Key="AnimationShow">
        <DoubleAnimation Storyboard.TargetName="m_Back" Storyboard.TargetProperty="RenderTransform.(ScaleTransform.ScaleX)" BeginTime="00:00:00.0" Duration="00:00:00.1" EasingFunction="{StaticResource EasingInOut}" To="0"/>
        <DoubleAnimation Storyboard.TargetName="m_Front" Storyboard.TargetProperty="RenderTransform.(ScaleTransform.ScaleX)" BeginTime="00:00:00.1" Duration="00:00:00.1" EasingFunction="{StaticResource EasingInOut}" To="1"/>
    </Storyboard>
</UserControl.Resources>

和结构如下：

<Canvas>
    <Grid Core:Name="m_Front" Height="{Core:Static Namespace:Card.RealHeight}" RenderTransformOrigin="0.5,0.5" Width="{Core:Static Namespace:Card.RealWidth}">
        <Grid.RenderTransform>
            <ScaleTransform ScaleX="0"/>
        </Grid.RenderTransform>
        <Image Core:Name="m_FrontImage" RenderOptions.BitmapScalingMode="HighQuality" RenderOptions.EdgeMode="Aliased" HorizontalAlignment="Left" Source="{Binding Source={Core:Static Properties:Resources.Fronts}, Converter={StaticResource ImagesConverter}}" Stretch="None" VerticalAlignment="Top">
            <Image.Clip>
                <RectangleGeometry Core:Name="m_FrontClipping"/>
            </Image.Clip>
            <Image.RenderTransform>
                <TranslateTransform Core:Name="m_FrontTranslation"/>
            </Image.RenderTransform>
        </Image>
    </Grid>
    <Grid Core:Name="m_Back" Canvas.Left="0" Canvas.Top="0" RenderTransformOrigin="0.5,0.5">
        <Grid.RenderTransform>
            <ScaleTransform/>
        </Grid.RenderTransform>
        <Image RenderOptions.BitmapScalingMode="HighQuality" RenderOptions.EdgeMode="Aliased" HorizontalAlignment="Left" Source="{Binding Source={Core:Static Properties:Resources.Back}, Converter={StaticResource ImagesConverter}}" Stretch="None" VerticalAlignment="Top"/>
    </Grid>
</Canvas>

如果我跑在后面的一切在用户控件code这些动画作品之一精绝的：

If I run one of those animations in the UserControl code behind everything works absolutely fine:

Storyboard show = (Storyboard)Resources["AnimationShow"];
show.Begin();

现在......我试图从用户控件本身（在我MainWindow.cs code背后是精确的）外模拟该动画：

Now... I was trying to simulate that animation from outside the UserControl itself (in my MainWindow.cs code behind to be exact):

DoubleAnimation animationKick1 = new DoubleAnimation();
animationKick1.BeginTime = beginTime;
animationKick1.Duration = TimeSpan.FromSeconds(0.125D);
animationKick1.To = 0D;
animationKick1.SetValue(Storyboard.TargetProperty, myUC.m_Front);
animationKick1.SetValue(Storyboard.TargetPropertyProperty, CreatePropertyPath("RenderTransform.(ScaleTransform.ScaleX)"));

DoubleAnimation animationKick2 = new DoubleAnimation();
animationKick2.BeginTime = beginTime;
animationKick2.Duration = TimeSpan.FromSeconds(0.125D);
animationKick2.To = 1D;
animationKick2.SetValue(Storyboard.TargetProperty, myUC.m_Back);
animationKick2.SetValue(Storyboard.TargetPropertyProperty, CreatePropertyPath("RenderTransform.(ScaleTransform.ScaleX)"));

但没有任何反应......为什么？我怎样才能从外部用户控件动画元素？

But nothing happens... why? How can I animate UserControl elements from outside?

推荐答案

你最好只露出你的用户控件运行动画的方法。你可能运行到与你的财产的路径一定范围的问题。试图从主窗口访问用户控件的内部并没有真正遵循封装的基本原理。是否有一个令人信服的理由，以保持动画code在主窗口？

You're better off just exposing a method on your UserControl to run the animation. You're probably running into some scoping issues with your property paths. Trying to access the internals of a user control from your main window doesn't really follow the basic principals of encapsulation. Is there a compelling reason to keep the animation code in MainWindow?

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