我有一个带有 ItemTemplate 的 ListBox(如下所示),当鼠标悬停在某个项目上时,会显示一个按钮,该按钮将触发删除命令。
这可行,但我想要的是在鼠标在列表项上停留几秒钟后按钮“淡入”。我怎样才能做到这一点?
<ListBox.ItemTemplate>
<DataTemplate d:DesignSource="{d:DesignInstance quizCompanion:Question}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="40"></ColumnDefinition>
<ColumnDefinition Width="16"></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock Text="{Binding Path=Number}"></TextBlock>
<Button
Content="x" Grid.Column="1"
Command=MyDeleteCommand>
<Button.Style>
<Style TargetType="Button">
<Setter Property="Visibility" Value="Hidden"></Setter>
<Style.Triggers>
<DataTrigger Binding="{Binding RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type ListBoxItem}},Path=IsMouseOver}" Value="True">
<Setter Property="Visibility" Value="Visible" />
</DataTrigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>