我想知道是否有可能延迟datatrigger 0.5秒来更改布局。是否有简单的方法可以实现?我需要设置对象的可见性,但需要等待0.5秒。非常感谢任何建议。
<DataTemplate x:Key="ListBoxItemDataTemplate">
<Grid x:Name="DataItem">
<Image x:Name="IconImage" Source="{Binding XPath=@icon}" Height="16" Margin="16,0,0,0" Stretch="None" VerticalAlignment="Center" HorizontalAlignment="Left" />
<TextBlock x:Name="ListboxIemtextBlock" Text="{Binding XPath=@name}" />
<Image x:Name="ArrowImage" Height="10" Source="Resources/Images/arrow_collapsed_grey.png" Visibility="{Binding XPath=@state}"/>
</Grid>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}, Mode=FindAncestor}}" Value="True">
<Setter TargetName="ListboxIemtextBlock" Property="Foreground" Value="White"/>
<Setter TargetName="IconImage" Property="Source" Value="{Binding XPath=@iconSelected}"/>
<Setter TargetName="IconImage" Property="Height" Value="16"/>
<Setter TargetName="ArrowImage" Property="Source" Value="Resources/Images/arrow_collapsed_white.png"/>
</DataTrigger>
<DataTrigger Binding="{Binding IsMouseOver, RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}, Mode=FindAncestor}}" Value="True">
<Setter TargetName="ListboxIemtextBlock" Property="Foreground" Value="#FF6dacbe"/>
</DataTrigger>
<DataTrigger Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type ListBox}}, Path=SelectedItem.Attributes[retract].Value}" Value="True">
<Setter TargetName="ListboxIemtextBlock" Property="Visibility" Value="Hidden" />
<DataTrigger.EnterActions>
<BeginStoryboard Name="StartAnimation" Storyboard="{StaticResource MakeObjectVisibleAfterHalfASecond}"/>
</DataTrigger.EnterActions>
<DataTrigger.ExitActions>
<RemoveStoryboard BeginStoryboardName="StartAnimation"/>
</DataTrigger.ExitActions>
</DataTrigger>
</DataTemplate.Triggers></DataTemplate>
故事板:
<Storyboard x:Key="MakeObjectVisibleAfterHalfASecond" Storyboard.TargetName="ListboxIemtextBlock">
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Duration="0" BeginTime="0:0:.5">
<DiscreteObjectKeyFrame Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>