UWP - 当鼠标悬停/聚焦时更改RichTextBox的背景/前景颜色

Question

我在Windows Universal应用程序上有一个RichTextBox，我希望它在任何时候都保持相同的颜色（在未选中事件、悬停和选中时）。目前，如果我设置背景/前景颜色，它只会在控件未被选中时生效，一旦鼠标悬停或聚焦在控件上，颜色就会恢复为默认的白色背景和黑色文本。

<RichEditBox HorizontalAlignment="Stretch" Margin="0,0,0,30" VerticalAlignment="Stretch" 
     FontFamily="Courier New" FontSize="12" IsSpellCheckEnabled="False"
     Background="Black" Foreground="LightGray" IsReadOnly="True"/>

我如何使“背景”和“前景”在鼠标悬停/选中事件中保持一致，以便始终呈现黑色背景和浅灰色前景？

- b.pell

Answer 1

你需要清除 PointerOver 和 Focused 视觉状态。

<Style TargetType="RichEditBox" x:Key="RichEditBoxStyle">
    <Setter Property="MinWidth" Value="{ThemeResource TextControlThemeMinWidth}" />
    <Setter Property="MinHeight" Value="{ThemeResource TextControlThemeMinHeight}" />
    <Setter Property="Foreground" Value="{ThemeResource SystemControlForegroundBaseHighBrush}" />
    <Setter Property="Background" Value="{ThemeResource SystemControlBackgroundAltHighBrush}" />
    <Setter Property="SelectionHighlightColor" Value="{ThemeResource SystemControlHighlightAccentBrush}" />
    <Setter Property="BorderBrush" Value="{ThemeResource SystemControlForegroundChromeDisabledLowBrush}" />
    <Setter Property="BorderThickness" Value="{ThemeResource TextControlBorderThemeThickness}" />
    <Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}" />
    <Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}" />
    <Setter Property="ScrollViewer.HorizontalScrollMode" Value="Auto" />
    <Setter Property="ScrollViewer.VerticalScrollMode" Value="Auto" />
    <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto" />
    <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />
    <Setter Property="ScrollViewer.IsDeferredScrollingEnabled" Value="False" />
    <Setter Property="TextWrapping" Value="Wrap" />
    <Setter Property="Padding" Value="{ThemeResource TextControlThemePadding}"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="RichEditBox">
                <Grid>
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualState x:Name="Disabled">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="HeaderContentPresenter"
                                                                    Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BackgroundElement"
                                                                Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledTransparentBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
                                                                Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlBackgroundBaseLowBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
                                                                Storyboard.TargetProperty="BorderBrush">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseLowBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentElement"
                                                                Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledChromeDisabledLowBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderTextContentPresenter"
                                                                Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledChromeDisabledLowBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Normal" />
                            <VisualState x:Name="PointerOver"/>

                            <VisualState x:Name="Focused"/>



                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="*"/>
                    </Grid.RowDefinitions>
                    <Border x:Name="BackgroundElement"
                        Grid.Row="1"
                        Background="{TemplateBinding Background}"
                        Margin="{TemplateBinding BorderThickness}"
                        Opacity="{ThemeResource TextControlBackgroundRestOpacity}"
                        Grid.ColumnSpan="2"
                        Grid.RowSpan="1"/>
                    <Border x:Name="BorderElement"
                        Grid.Row="1"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        Grid.ColumnSpan="2"
                        Grid.RowSpan="1"/>
                    <ContentPresenter x:Name="HeaderContentPresenter"
                                    x:DeferLoadStrategy="Lazy"
                                    Visibility="Collapsed"
                                    Grid.Row="0"
                                    Foreground="{ThemeResource SystemControlForegroundBaseHighBrush}"
                                    Margin="0,0,0,8"
                                    Grid.ColumnSpan="2"
                                    Content="{TemplateBinding Header}"
                                    ContentTemplate="{TemplateBinding HeaderTemplate}"
                                    FontWeight="Normal" />
                    <ScrollViewer x:Name="ContentElement"
                                Grid.Row="1"
                                HorizontalScrollMode="{TemplateBinding ScrollViewer.HorizontalScrollMode}"
                                HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
                                VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}"
                                VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}"
                                IsHorizontalRailEnabled="{TemplateBinding ScrollViewer.IsHorizontalRailEnabled}"
                                IsVerticalRailEnabled="{TemplateBinding ScrollViewer.IsVerticalRailEnabled}"
                                IsDeferredScrollingEnabled="{TemplateBinding ScrollViewer.IsDeferredScrollingEnabled}"
                                Margin="{TemplateBinding BorderThickness}"
                                Padding="{TemplateBinding Padding}"
                                IsTabStop="False"
                                ZoomMode="Disabled"
                                AutomationProperties.AccessibilityView="Raw"/>
                    <ContentControl x:Name="PlaceholderTextContentPresenter"
                                Grid.Row="1"
                                Foreground="{ThemeResource SystemControlPageTextBaseMediumBrush}"
                                Margin="{TemplateBinding BorderThickness}"
                                Padding="{TemplateBinding Padding}"
                                IsTabStop="False"
                                Grid.ColumnSpan="2"
                                Content="{TemplateBinding PlaceholderText}"
                                IsHitTestVisible="False"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

并与您的控制一起使用：

<RichEditBox Style="{StaticResource RichEditBoxStyle}"
                Height="200"
                VerticalAlignment="Center"/>

- Andrii Krupka

---

谢谢，那个完美地解决了我的问题。我之前一直找不到这些（在看了你的代码后，我才知道可以右键单击控件并“编辑副本”，从而生成XAML基础的编辑模板菜单）。再次感激！ - b.pell