ControlTemplate Storyboard颜色动画问题

Question

我有彩色动画的问题.这是我的来源:

 <Window.Resources>
    <hedit:BrushToColorConverter x:Key="BrushToColorConverter" />
    <Style x:Key="MyButtonStyle" TargetType="Button">
        <Setter Property="OverridesDefaultStyle" Value="True"/>
        <Setter Property="Margin" Value="5"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="Button">
                    <ControlTemplate.Resources>
                        <Storyboard x:Key="buttonAnimIn">
                            <!-- Problem line -->
                            <ColorAnimation Storyboard.TargetName="bntBack" Storyboard.TargetProperty="Color" To="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type UserControl}}, Converter={StaticResource BrushToColorConverter}}" />
                        </Storyboard>
                        <Storyboard x:Key="buttonAnimOut">
                            <ColorAnimation Storyboard.TargetName="bntBack" Storyboard.TargetProperty="Color" To="Blue" />
                        </Storyboard>
                        <Storyboard x:Key="buttonAnimForegroundIn">
                            <ColorAnimation Storyboard.TargetName="btnFore" Storyboard.TargetProperty="Color" To="Blue" />
                        </Storyboard>
                        <Storyboard x:Key="buttonAnimForegroundOut">
                            <ColorAnimation Storyboard.TargetName="btnFore" Storyboard.TargetProperty="Color" To="Red" />
                        </Storyboard>
                    </ControlTemplate.Resources>
                    <Border Name="border" 
                        BorderThickness="1"
                        Padding="4,2" 
                        BorderBrush="DarkGray" 
                        CornerRadius="3">
                        <Border.Background>
                            <SolidColorBrush Color="Blue" x:Name="bntBack" />
                        </Border.Background>
                        <ContentControl HorizontalAlignment="Center" VerticalAlignment="Center" Content="{TemplateBinding Content}">
                            <ContentControl.Foreground>
                                <SolidColorBrush Color="Red" x:Name="btnFore" />
                            </ContentControl.Foreground>
                        </ContentControl >
                    </Border>
                    <ControlTemplate.Triggers>
                        <EventTrigger RoutedEvent="Button.MouseEnter">
                            <BeginStoryboard Storyboard="{StaticResource buttonAnimIn}" />
                            <BeginStoryboard Storyboard="{StaticResource buttonAnimForegroundIn}" />
                        </EventTrigger>
                        <EventTrigger RoutedEvent="Button.MouseLeave">
                            <BeginStoryboard Storyboard="{StaticResource buttonAnimOut}" />
                            <BeginStoryboard Storyboard="{StaticResource buttonAnimForegroundOut}" />
                        </EventTrigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Window.Resources>

问题是:

无法将属性"Style"中的值转换为"System.Windows.Style"类型的对象.无法冻结此Storyboard时间轴树以跨线程使用.标记文件'HLSLEditor; component/mainwindow.xaml'中的对象'System.Windows.Controls.Button'出错.第223行位置25.

使用固定颜色时,它可以工作,但它无法使用父级的前景颜色...

如何对前景或背景颜色进行动画处理？

谢谢!

Answer 1

你不能冻结Bindings,你可能可以通过将颜色声明为资源来解决这个问题,然后在动画中使用StaticResource时将Control的背景绑定到它.

例如

<Window.Background>
    <SolidColorBrush Color="{DynamicResource Background}"/>
</Window.Background>
<Window.Resources>
    <Color x:Key="Background">Green</Color>
</Window.Resources>

<ColorAnimation Storyboard.TargetProperty="Foreground.Color"
                Duration="0:0:1"
                To="{StaticResource Background}"/>

替代使用资源类:

public static class MyColors
{
    public static Color MyHighlightColor = Color.FromArgb(255, 0, 88, 0);
}

<ColorAnimation Storyboard.TargetProperty="Foreground.Color"
                Duration="0:0:1"
                To="{x:Static local:MyColors.MyHighlightColor}"/>