Question

设置不透明度值会更改背景（好）和所选项本身（坏）。

<Setter Property="Template">
    <Setter.Value>
        <ControlTemplate TargetType="{x:Type ListBoxItem}">
            <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
                <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="IsSelected" Value="true">
                    <Setter Property="Background" TargetName="Bd" Value="LightSlateGray"/>
                    <!--<Setter Property="Opacity" TargetName="Bd" Value="0.5"/>-->
                </Trigger>
                <MultiTrigger>
                    <MultiTrigger.Conditions>
                        <Condition Property="IsSelected" Value="true"/>
                        <Condition Property="Selector.IsSelectionActive" Value="false"/>
                    </MultiTrigger.Conditions>
                    <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.InactiveSelectionHighlightBrushKey}}"/>
                    <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.InactiveSelectionHighlightTextBrushKey}}"/>
                </MultiTrigger>
                <Trigger Property="IsEnabled" Value="false">
                    <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
    </Setter.Value>
</Setter>

Answer 1

您可以像这样设置Opacity使用的SolidColorBrush的Background：

<Trigger Property="IsSelected" Value="true">
    <Setter Property="Background" TargetName="Bd">
        <Setter.Value>
            <SolidColorBrush Color="LightSlateGray" Opacity="0.5"/>
        </Setter.Value>
    </Setter>
</Trigger>

Answer 2

LightSlateGray是＃778899。您可以使用ARgb设置＃7F778899。

Answer 3

您应该使用#AARRGGBB值，但如果您坚持使用Opacity，那么您可以试试这个：

<Setter Property="Template">
    <Setter.Value>
        <ControlTemplate TargetType="{x:Type ListBoxItem}">
            <Grid>
                <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true"/>
                <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
            </Grid>

            <ControlTemplate.Triggers>
                <Trigger Property="IsSelected" Value="true">
                    <Setter Property="Background" TargetName="Bd" Value="LightSlateGray"/>
                    <Setter Property="Opacity" TargetName="Bd" Value="0.5"/>
                </Trigger>
                <MultiTrigger>
                    <MultiTrigger.Conditions>
                        <Condition Property="IsSelected" Value="true"/>
                        <Condition Property="Selector.IsSelectionActive" Value="false"/>
                    </MultiTrigger.Conditions>
                    <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.InactiveSelectionHighlightBrushKey}}"/>
                    <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.InactiveSelectionHighlightTextBrushKey}}"/>
                </MultiTrigger>
                <Trigger Property="IsEnabled" Value="false">
                    <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
    </Setter.Value>
</Setter>

如何在不更改所选项目本身的透明度的情况下更改“选定”背景的透明度？

3 个答案: