Windows 10 中的 WPF 列表框突出显示 [英] WPF ListBox Highlight in Windows 10

问题描述

我对 WPF 相当陌生，但在 .NET (Winforms) 方面经验丰富.我正在尝试操纵列表框的突出显示样式来控制所选项目的聚焦和未聚焦颜色.我发现的每个教程都使用自定义样式为 SystemColors.HighlightBrushKey 和 SystemColors.ControlBrushKey 分配一个新值.但它不起作用.经过无数小时试图让它工作，我突然想到它可能与操作系统有关.我一直在 Windows 10 系统上尝试它.我在 Windows 7 设置上运行了完全相同的代码，你瞧，它成功了！

I'm fairly new to WPF but experienced in .NET (Winforms). I'm trying to manipulate the highlight style of a listbox to control the focused and unfocused color of the selected item. Every single tutorial on this that I have found uses a custom style to assign a new value to the SystemColors.HighlightBrushKey and SystemColors.ControlBrushKey. But it isn't working. After countless hours trying to get this to work, it occurred to me that maybe it was OS related. I had been trying it on a Windows 10 system. I ran the exact same code on a Windows 7 setup, and lo and behold, it worked!

显然旧方法在 Windows 10 中不起作用(至少在我看来是这样).有没有人找到替代方案?归根结底，我只希望列表框即使在没有焦点的情况下也能保持明亮的高光.默认的灰色高亮很难看到，并且在某些用法中似乎不合适.我有一个真实的场景，当焦点从 ListBox 移开时，高光基本上消失了，感觉非常不自然.

So apparently the old method doesn't work in Windows 10 (at least that's what it looks like to me). Has anybody found an alternative? At the end of the day, I just want the listbox to maintain the bright highlight even when it doesn't have focus. The default grey highlight is difficult to see, and doesn't seem appropriate in some usages. I have a real world scenario where it feels very unnatural for the highlight to basically disappear when the focus moves away from the ListBox.

下面是我使用的在 Windows 7 上工作但在 Windows 10 上不工作的 XAML 代码.(顺便说一下，我也尝试用 SystemColors.InactiveSelectionHighlightBrushKey 替换 SystemColors.ControlBrushKey - 结果是一样的).

Below is the XAML code I used that worked on Windows 7 but not on Windows 10. (By the way, I have also tried replacing SystemColors.ControlBrushKey with SystemColors.InactiveSelectionHighlightBrushKey -- the results were the same).

    <Window x:Class="TestApp.TestWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:TestApp"
        mc:Ignorable="d"
        Title="TestWindow" Height="300" Width="300" Loaded="Window_Loaded">
    <Window.Resources>
        <Style x:Key="myListboxStyle">
            <Style.Resources>
                <!-- Background of selected item when focused -->
                <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Red" />
                <!-- Background of selected item when not focused -->
                <SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="Green" />
            </Style.Resources>
        </Style>
    </Window.Resources>
    <Grid>
        <ListBox x:Name="listBox" Style="{StaticResource myListboxStyle}" HorizontalAlignment="Left" Height="100" Margin="22,18,0,0" VerticalAlignment="Top" Width="237">
            <ListBoxItem>Test 1</ListBoxItem>
            <ListBoxItem>Test 2</ListBoxItem>
            <ListBoxItem>Test 3</ListBoxItem>
        </ListBox>
            <TextBox x:Name="textBox" HorizontalAlignment="Left" Height="23" Margin="50,165,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="120"/>

    </Grid>
</Window>

推荐答案

如果您真的想更改应用的默认设置，您可以随时通过复制模板来修改样式.在本例中为 ListBoxItem 样式.

If you really want to change the defaults for your app, you can always modify the style by making a copy of the template. In this case ListBoxItem style.

在设计器中，单击 ListBoxItem，右键单击编辑模板，然后编辑副本.

In the designer, click on a ListBoxItem, right click Edit Template, and Edit a Copy.

以下是我在我的机器上获得的内容，以及以红色/绿色运行的应用程序的屏幕截图，展示了应用于受影响项目的样式.您当然会将其应用于所有项目...

Below is what I got on my machine, and a screenshot of the app running with Red/Green demonstrating the style applied to affected items. You would of course apply this to all items...

<Window.Resources>
    <Style x:Key="FocusVisual">
        <Setter Property="Control.Template">
            <Setter.Value>
                <ControlTemplate>
                    <Rectangle Margin="2" SnapsToDevicePixels="true" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <SolidColorBrush x:Key="Item.MouseOver.Background" Color="#1F26A0DA"/>
    <SolidColorBrush x:Key="Item.MouseOver.Border" Color="#a826A0Da"/>
    <SolidColorBrush x:Key="Item.SelectedInactive.Background" Color="#3DDADADA"/>
    <SolidColorBrush x:Key="Item.SelectedInactive.Border" Color="#FFDADADA"/>
    <SolidColorBrush x:Key="Item.SelectedActive.Background" Color="#3D26A0DA"/>
    <SolidColorBrush x:Key="Item.SelectedActive.Border" Color="#FF26A0DA"/>
    <Style x:Key="ListBoxItemStyle1" TargetType="{x:Type ListBoxItem}">
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="Padding" Value="4,1"/>
        <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
        <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderBrush" Value="Transparent"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual}"/>
        <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>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsMouseOver" Value="True"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="Background" TargetName="Bd" Value="{StaticResource Item.MouseOver.Background}"/>
                            <Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource Item.MouseOver.Border}"/>
                        </MultiTrigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="Selector.IsSelectionActive" Value="False"/>
                                <Condition Property="IsSelected" Value="True"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="Background" TargetName="Bd" Value="{StaticResource Item.SelectedInactive.Background}"/>
                            <Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource Item.SelectedInactive.Border}"/>
                        </MultiTrigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="Selector.IsSelectionActive" Value="True"/>
                                <Condition Property="IsSelected" Value="True"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="Background" TargetName="Bd" Value="{StaticResource Item.SelectedActive.Background}"/>
                            <Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource Item.SelectedActive.Border}"/>
                        </MultiTrigger>
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter Property="TextElement.Foreground" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <Style x:Key="ListBoxItemStyle2" TargetType="{x:Type ListBoxItem}">
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="Padding" Value="4,1"/>
        <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
        <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderBrush" Value="Transparent"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual}"/>
        <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>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsMouseOver" Value="True"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="Background" TargetName="Bd" Value="{StaticResource Item.MouseOver.Background}"/>
                            <Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource Item.MouseOver.Border}"/>
                        </MultiTrigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="Selector.IsSelectionActive" Value="False"/>
                                <Condition Property="IsSelected" Value="True"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="Background" TargetName="Bd" Value="Red"/>
                            <Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource Item.SelectedInactive.Border}"/>
                        </MultiTrigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="Selector.IsSelectionActive" Value="True"/>
                                <Condition Property="IsSelected" Value="True"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="Background" TargetName="Bd" Value="Green"/>
                            <Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource Item.SelectedActive.Border}"/>
                        </MultiTrigger>
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter Property="TextElement.Foreground" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

</Window.Resources>

<Grid x:Name="LayoutRoot" Opacity="{Binding MainWindowOpacity}">
    <StackPanel>
        <TextBlock Text="WPF" FontSize="36" Margin="20" Foreground="Orange" HorizontalAlignment="Center"/>
        <ListBox x:Name="listBox" HorizontalAlignment="Left" Height="100" VerticalAlignment="Top" Width="237">
            <ListBoxItem Style="{DynamicResource ListBoxItemStyle1}">Test 1</ListBoxItem>
            <ListBoxItem Style="{DynamicResource ListBoxItemStyle2}">Test 2</ListBoxItem>
            <ListBoxItem>Test 3</ListBoxItem>
        </ListBox>
    </StackPanel>
</Grid>

以及正在运行的应用程序:

And the app in action:

活动:

不活跃:

告诫购买者.

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