Question

我有一个用于开关控件的颜色动画，并且让背景颜色可以变换我想将父控件的Background属性绑定到To ColorAnimation属性。我尝试了很多，但没有人工作。我怎么能这样做？

切换控件样式：

<Setter Property="Template">
<Setter.Value>
    <ControlTemplate TargetType="CheckBox">
        <Viewbox Stretch="Uniform">
            <Border x:Name="layer" Width="35" Height="20" CornerRadius="10,10,10,10" 
                            Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}">
                <Canvas Canvas.Top="0" Canvas.Left="0">
                    <Ellipse x:Name="circle" Fill="Gray" Stroke="DarkGray" StrokeThickness="0" 
                                 Width="20" Height="20">
                        <Ellipse.RenderTransform>
                            <TranslateTransform X="0" Y="0"/>
                        </Ellipse.RenderTransform>
                    </Ellipse>
                </Canvas>
            </Border>
        </Viewbox>
        <ControlTemplate.Triggers>
            <Trigger Property="IsChecked" Value="True">
                <Trigger.EnterActions>
                    <BeginStoryboard>
                        <Storyboard>
                            <ColorAnimation Storyboard.TargetName="layer" 
                                                    Storyboard.TargetProperty="Background.Color"
                                                    To="LightGreen"
                                                    Duration="0:0:0.3"/>
                            <DoubleAnimation Storyboard.TargetName="circle"
                                                     Storyboard.TargetProperty="(Ellipse.RenderTransform).(TranslateTransform.X)"
                                                     To="15"
                                                     Duration="0:0:0.3"/>
                        </Storyboard>
                    </BeginStoryboard>
                </Trigger.EnterActions>
                <Trigger.ExitActions>
                    <BeginStoryboard>
                        <Storyboard>
                            <ColorAnimation Storyboard.TargetName="layer" 
                                                    Storyboard.TargetProperty="Background.Color"
                                                    Duration="0:0:0.3"
                                                        To="{TemplateBinding Background}"/>
                            <DoubleAnimation Storyboard.TargetName="circle"
                                                     Storyboard.TargetProperty="(Ellipse.RenderTransform).(TranslateTransform.X)"
                                                     To="0"
                                                     Duration="0:0:0.3"/>
                        </Storyboard>
                    </BeginStoryboard>
                </Trigger.ExitActions>
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>
</Setter.Value>
</Style>

ColorAnimation部分：

    <ColorAnimation Storyboard.TargetName="layer" 
                    Storyboard.TargetProperty="Background.Color"
                    To="{TemplateBinding Background}"
                    Duration="0:0:0.3"/>

Answer 1

您无法在彩色动画中使用绑定，否则您将收到此错误 ＆＃34;无法冻结此Storyboard时间轴树以供跨线程使用＆＃34; ，有关此内容的更多信息： WPF Animation "Cannot freeze this Storyboard timeline tree for use across threads"

现在，如果你想要一个解决方法，你可以做的是创建一个静态资源，代表你父控件的背景颜色，如下所示：

$L = ipcsv ln.csv |Select-Object -ExpandProperty Letter |Where-Object {$_} |Get-Random
$N = ipcsv ln.csv |Select-Object -ExpandProperty Number |Where-Object {$_} |Get-Random

然后您可以将此资源分配给您的颜色动画属性，如下所示：

 <Color  A="255"
            R="100"
            G="0"
            B="0"
            x:Key="resource" />

希望它有所帮助。

如何将背景颜色绑定到ColorAnimation的属性“To”？

1 个答案: