2

我想知道是否有办法只使用 XAML 对属性执行动画，然后在下一次单击时执行反向动画？

这是我在 Border 对象上的 Trigger 示例，以呈现滑出的外观：

<!-- Animates the Width to Slide It Out. -->
<EventTrigger RoutedEvent="Border.MouseLeftButtonUp">
  <BeginStoryboard>
     <Storyboard>
        <DoubleAnimation Storyboard.TargetName="theFilterControl"
             Storyboard.TargetProperty="Width"
             From="16"
             To="170"
             Duration="0:0:.7" />
      </Storyboard>
    </BeginStoryboard>
 </EventTrigger>
4

2 回答 2

4

您可以为 ToggleButton 创建一个 ControlTemplate 并将边框放入其中。并且 Button ControlTemplate 可以为您提供动画的 IsPressed 属性。

<ToggleButton>
    <ToggleButton.Template>
        <ControlTemplate  TargetType="{x:Type ToggleButton}">
            <Border x:Name="theFilterControl" Background="#FF686868" 
                BorderBrush="Black" Width="16" />
            <ControlTemplate.Triggers>
                <EventTrigger RoutedEvent="ToggleButton.Checked">
                    <BeginStoryboard> 
                    <Storyboard>
                          <DoubleAnimation Storyboard.TargetName="theFilterControl"
                                 Storyboard.TargetProperty="Width"
                                 From="16"
                                 To="170"
                                 Duration="0:0:.7" />
                    </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
                <EventTrigger RoutedEvent="ToggleButton.Unchecked">
                    <BeginStoryboard>
                        <Storyboard>
                          <DoubleAnimation Storyboard.TargetName="theFilterControl"
                                 Storyboard.TargetProperty="Width"
                                 From="170"
                                 To="16"
                                 Duration="0:0:.7" />
                          </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
    </ToggleButton.Template>
</ToggleButton>
于 2009-07-14T17:24:59.753 回答
2

Jobi 的 ToggleButton 的好主意，谢谢！您还可以通过在 ControlTemplate 之外和 UserControl（或页面）触发器区域内定义 ToggleButton 触发器来解决范围问题，例如

  <UserControl.Triggers>
    <EventTrigger RoutedEvent="ToggleButton.Checked"
                  SourceName="ExpandCollapseToggleButton">
        <EventTrigger.Actions>
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation 
                        Storyboard.TargetName="SidebarCanvas"
                        Storyboard.TargetProperty="Width"
                        To="0"
                        Duration="0:0:0.15" />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger.Actions>
    </EventTrigger>
    <EventTrigger RoutedEvent="ToggleButton.Unchecked"
                  SourceName="ExpandCollapseToggleButton">
        <EventTrigger.Actions>
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation 
                        Storyboard.TargetName="SidebarCanvas"
                        Storyboard.TargetProperty="Width"
                        To="250"
                        Duration="0:0:0.15" />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger.Actions>
    </EventTrigger>
</UserControl.Triggers>

似乎 ControlTemplate 的范围与 UserControl/Page 完全不同，因此您不能引用这些范围之间的目标。

于 2010-01-08T18:43:36.213 回答