在WPF触发器开始在不同的控制故事板 [英] Start storyboard on a different control on a trigger in WPF

问题描述

如果一个故事板动画落在ellipse1运行变化的不透明度，我可以触发其不透明度在某个值，并开始则ellipse2一个动画故事板将在开始褪色上呢？

 ＆LT; UniformGrid列=2＆GT;
    ＆LT;椭圆WIDTH =25HEIGHT =25NAME =ellipse1的＆GT;
        ＆LT; Ellipse.Triggers＆GT;
            ＆LT;7触发属性=透明度值=＆GT;
                做点什么这里开始一个不透明淡入则ellipse2
            ＆LT; /触发＆GT;
        ＆LT; /Ellipse.Triggers>
    ＆LT; /椭圆＆GT;
    ＆LT;椭圆WIDTH =25HEIGHT =25NAME =则ellipse2＆GT;    ＆LT; /椭圆＆GT;
＆LT; / UniformGrid＆GT;
 

解决方案

您可以使用的 DataTrigger 中则ellipse2观察ellipse1的：

 ＆LT;椭圆WIDTH =25HEIGHT =25NAME =则ellipse2＆GT;
    ＆LT; Ellipse.Style＆GT;
        ＆LT;风格的TargetType ={X：椭圆型}＆GT;
            ＆LT; Style.Triggers＆GT;
                ＆LT; D​​ataTrigger绑定={结合透明度，的ElementName =} ellipse1的VALUE =0.5＆GT;
                    ＆LT; D​​ataTrigger.EnterActions＆GT;
                        ＆LT; BeginStoryboard＆GT;
                            ＆LT;！ - 情节提要这里椭圆2  - ＆GT;
                        ＆LT; / BeginStoryboard＆GT;
                    ＆LT; /DataTrigger.EnterActions>
                ＆LT; / DataTrigger＆GT;
            ＆LT; /Style.Triggers>
        ＆LT; /样式和GT;
    ＆LT; /Ellipse.Style>
＆LT; /椭圆＆GT;
 

If a storyboard animation is running on ellipse1 changing the opacity, can I trigger on its opacity at a certain value and start a storyboard animation on ellipse2 that will start a fade in on it?

<UniformGrid Columns="2">
    <Ellipse Width="25" Height="25" Name="ellipse1">
        <Ellipse.Triggers>
            <Trigger Property="Opacity" Value=".7">
                do something here to start a opacity fade in on ellipse2
            </Trigger>
        </Ellipse.Triggers>
    </Ellipse>
    <Ellipse Width="25" Height="25" Name="ellipse2">

    </Ellipse>
</UniformGrid>

解决方案

You could use a DataTrigger in ellipse2 to observe ellipse1:

<Ellipse Width="25" Height="25" Name="ellipse2">
    <Ellipse.Style>
        <Style TargetType="{x:Type Ellipse}">
            <Style.Triggers>
                <DataTrigger Binding="{Binding Opacity, ElementName=ellipse1}" Value="0.5">
                    <DataTrigger.EnterActions>
                        <BeginStoryboard>
                            <!-- Storyboard for ellipse 2 here -->
                        </BeginStoryboard>
                    </DataTrigger.EnterActions>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Ellipse.Style>
</Ellipse>

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