这应该相当简单,但我似乎无法做到正确。
我有一个System.Windows.Controls.Image
的集合。当我选择其中一个时,我希望所有其他人获得0.5
的不透明度。我正在使用MVVM,其背后的逻辑(找到所选图像并将其设置为Enabled
)在ViewModel
中完成,并且正在运行。所以基本上这是有效的:
<Image Grid.Row="0" Source="{Binding ItemImage}" IsEnabled="{Binding ItemImageEnabled}">
<Image.Style>
<Style TargetType="Image">
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.5"/>
</Trigger>
<Trigger Property="IsEnabled" Value="True">
<Setter Property="Opacity" Value="1.0"/>
</Trigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
现在我希望不透明度变换动画,在未选择图像时将其从1.0
淡化为0.5
,并在0.5
淡入1.0
时它是。我原本以为这会起作用:
<Image Grid.Row="0" Source="{Binding ItemImage}" IsEnabled="{Binding ItemImageEnabled}">
<Image.Style>
<Style TargetType="Image">
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="Opacity" From="1" To="0.5" BeginTime="0:0:0" Duration="0:0:1"/>
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
</Trigger>
<Trigger Property="IsEnabled" Value="True">
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="Opacity" From="0.5" To="1" BeginTime="0:0:0" Duration="0:0:1"/>
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
</Trigger>
</Style.Triggers>
</Style>
</Image.Style>
......但它没有
任何人都有任何想法。任何帮助将不胜感激。提前致谢。
答案 0 :(得分:6)
您需要Trigger.ExitActions
而不是两个Trigger
。这应该是你想要的:
<Style TargetType="Image">
<Style.Triggers>
<Trigger Property="IsEnabled" Value="True">
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="Opacity" From="0.5" To="1" BeginTime="0:0:0" Duration="0:0:1"/>
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="Opacity" From="1" To="0.5" BeginTime="0:0:0" Duration="0:0:1"/>
</Storyboard>
</BeginStoryboard>
</Trigger.ExitActions>
</Trigger>
</Style.Triggers>
</Style>