WPF中ListBoxItem控件模板设计的问题？

这是我的XAML：

<ListBox 
  Name="PlaylistListBox" 
  ScrollViewer.CanContentScroll="False" 
  HorizontalContentAlignment="Stretch" 
  ItemsSource="{Binding Source={StaticResource ResourceKey=MyListBoxView}}" 
  ItemTemplateSelector="{Binding Source={StaticResource ResourceKey=MySelector}}" 
  MouseDoubleClick="PlaylistListBox_MouseDoubleClick" >
  <ListBox.ItemContainerStyle> 
    <Style TargetType="ListBoxItem">
      <Setter Property="SnapsToDevicePixels" Value="true"/>
      <Setter Property="OverridesDefaultStyle" Value="true"/>
      <Setter Property="Template"> 
        <Setter.Value>
          <ControlTemplate TargetType="ListBoxItem"> 
            <Border 
              Name="Border" 
              CornerRadius="4" 
              SnapsToDevicePixels="true">
              <ContentPresenter />
            </Border>
            <ControlTemplate.Triggers>
              <Trigger Property="IsSelected" Value="true">
                <Setter TargetName="Border" Property="Background" Value="Black" />

                <!-- The following setter for opacity is giving me headaches -->
                <Setter TargetName="Border" Property="Opacity" Value="0.5" />

              </Trigger>
            </ControlTemplate.Triggers>
          </ControlTemplate>
        </Setter.Value>
      </Setter>
      <EventSetter 
        Event="Loaded" 
        Handler="PlaylistListBoxItem_Loaded" />
    </Style>
  </ListBox.ItemContainerStyle>
</ListBox>

两个问题：

由于

不透明度

设置器，整个项目的透明度为50%。我只想要一个

ListBoxItem

ControlTemplate

中定义的边框及其内容是透明的 以保持完全不透明度

当

列表框

不可用时，如何使Setter/Trigger使相同的边框变为红色 聚焦？它应该类似于

InFocus=“False”

和

IsSelected=“True”

谢谢你的澄清

您应该在内容下方放置另一个边框，使其半透明，使主要内容完全可见。您可以通过使用

网格

并首先在其中放置一个“背景”边框，然后再放置内容来完成此操作。这样，您将只在背景边框上设置不透明度，而不在内容上设置不透明度

您可以使用

multi-trigger

下面是修改后的样式，它显示了我的意思：

<ListBox 
  Name="PlaylistListBox" 
  ScrollViewer.CanContentScroll="False" 
  HorizontalContentAlignment="Stretch" 
  ItemsSource="{Binding Source={StaticResource ResourceKey=MyListBoxView}}" 
  ItemTemplateSelector="{Binding Source={StaticResource ResourceKey=MySelector}}" 
  MouseDoubleClick="PlaylistListBox_MouseDoubleClick" >
  <ListBox.ItemContainerStyle> 
    <Style TargetType="ListBoxItem">
      <Setter Property="SnapsToDevicePixels" Value="true"/>
      <Setter Property="OverridesDefaultStyle" Value="true"/>
      <Setter Property="Template"> 
        <Setter.Value>
          <ControlTemplate TargetType="ListBoxItem"> 
            <Grid>
              <Border 
                 Name="BackgroundBorder" 
                 CornerRadius="4" 
                 SnapsToDevicePixels="true">                 
              </Border>
              <Border Name="Border">
                 <ContentPresenter />
              </Border>
            </Grid>
            <ControlTemplate.Triggers>
              <Trigger Property="IsSelected" Value="true">
                <Setter TargetName="BackgroundBorder" Property="Background" Value="Black" />

                <!-- The following setter for opacity is giving me headaches -->
                <Setter TargetName="BackgroundBorder" Property="Opacity" Value="0.5" />

              </Trigger>
              <MultiTrigger>
                 <MultiTrigger.Conditions>
                      <Condition Property="IsSelected" Value="True"/>
                      <Condition Property="IsFocused" Value="False"/>
                 </MultiTrigger.Conditions>
                 <Setter TargetName="BackgroundBorder" Property="Background" Value="Red" />
              </MultiTrigger>
            </ControlTemplate.Triggers>
          </ControlTemplate>
        </Setter.Value>
      </Setter>
      <EventSetter 
        Event="Loaded" 
        Handler="PlaylistListBoxItem_Loaded" />
    </Style>
  </ListBox.ItemContainerStyle>
</ListBox>