BorderBrush不可见

Question

我有3个单选按钮。通常情况下，radioButton中的borderBrush不可见，但它的属性不为null。当我点击radioButton时，会看到一个中心单选按钮，但borderBrush不是。

为什么BorderBrush不可见？

<RadioButton Content="Low" 
             Tag="Low" 
             Grid.Row="1"
             BorderBrush="{StaticResource LowPrioritySolidColorBrush}"
             Checked="OnPriorityButtonChecked"
             FontSize="17"
             Visibility="Visible"
             Margin="0,15,0,0"/>
<RadioButton Grid.Column="1" 
             Margin="0,15,0,0"
             Grid.Row="1"
             Content="Medium" 
             Tag="Medium" 
             Visibility="Visible"
             BorderBrush="{StaticResource MediumPrioritySolidColorBrush}"
             Checked="OnPriorityButtonChecked"
             FontSize="17"/>
<RadioButton Grid.Column="2" 
             Margin="20,15,0,0"
             Grid.Row="1"
             Content="High"
             Tag="High" 
             Visibility="Visible"
             BorderBrush="{StaticResource HighPrioritySolidColorBrush}" 
             Checked="OnPriorityButtonChecked"
             FontSize="17"/>

Answer 1

这是UWP中RadioButtons的默认外观：

“复选框”的轮廓默认为黑色，并在选中按钮时将颜色更改为用户的强调色。内部的点也是黑色的。然而，在你的情况下，RadioButtons看起来非常不同，里面有一个彩色圆点，没有轮廓，所以必须有一个自定义Style应用于它们。尝试搜索TargetType="RadioButton"的解决方案以找到它。 RadioButtons不必直接拥有Style，但仅Style定位它们就足以定义x:Key。

将BorderBrush和BorderThickness应用于默认样式时，结果如下所示：

我猜这不是你想要的:-)。为了实现您的目标，您必须声明自己的自定义样式，该样式将使用BorderBrush作为大纲的源颜色：

<Color x:Key="LowPriorityColor">#60BA66</Color>
<Color x:Key="MediumPriorityColor">#FFB900</Color>
<Color x:Key="HighPriorityColor">#CE4949</Color>
<SolidColorBrush x:Key="LowPrioritySolidColorBrush" Color="{StaticResource LowPriorityColor}"/>
<SolidColorBrush x:Key="MediumPrioritySolidColorBrush" Color="{StaticResource MediumPriorityColor}"/>
<SolidColorBrush x:Key="HighPrioritySolidColorBrush" Color="{StaticResource HighPriorityColor}"/>
<Style x:Key="PriorityRadioStyle" TargetType="RadioButton">
    <Setter Property="Background" Value="{ThemeResource RadioButtonBackground}"/>
    <Setter Property="Foreground" Value="{ThemeResource RadioButtonForeground}"/>
    <Setter Property="BorderBrush" Value="{ThemeResource RadioButtonBorderBrush}"/>
    <Setter Property="Padding" Value="8,6,0,0"/>
    <Setter Property="HorizontalAlignment" Value="Left"/>
    <Setter Property="VerticalAlignment" Value="Center"/>
    <Setter Property="HorizontalContentAlignment" Value="Left"/>
    <Setter Property="VerticalContentAlignment" Value="Top"/>
    <Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}"/>
    <Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}"/>
    <Setter Property="MinWidth" Value="120"/>
    <Setter Property="UseSystemFocusVisuals" Value="True"/>
    <Setter Property="FocusVisualMargin" Value="-7,-3,-7,-3"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="RadioButton">
                <Grid x:Name="RootGrid" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="20"/>
                        <ColumnDefinition Width="*"/>
                    </Grid.ColumnDefinitions>
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualState x:Name="Normal"/>
                            <VisualState x:Name="PointerOver">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonForegroundPointerOver}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonBackgroundPointerOver}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="BorderBrush">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonBorderBrushPointerOver}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OuterEllipse" Storyboard.TargetProperty="Stroke">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonOuterEllipseStrokePointerOver}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OuterEllipse" Storyboard.TargetProperty="Fill">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonOuterEllipseFillPointerOver}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckOuterEllipse" Storyboard.TargetProperty="Stroke">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonOuterEllipseCheckedStrokePointerOver}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckOuterEllipse" Storyboard.TargetProperty="Fill">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonOuterEllipseCheckedFillPointerOver}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Fill">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonCheckGlyphFillPointerOver}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Stroke">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonCheckGlyphStrokePointerOver}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Pressed">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonForegroundPressed}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonBackgroundPressed}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="BorderBrush">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonBorderBrushPressed}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OuterEllipse" Storyboard.TargetProperty="Stroke">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonOuterEllipseStrokePressed}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OuterEllipse" Storyboard.TargetProperty="Fill">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonOuterEllipseFillPressed}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckOuterEllipse" Storyboard.TargetProperty="Stroke">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonOuterEllipseCheckedStrokePressed}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckOuterEllipse" Storyboard.TargetProperty="Fill">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonOuterEllipseCheckedFillPressed}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Fill">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonCheckGlyphFillPressed}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Stroke">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonCheckGlyphStrokePressed}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Disabled">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonForegroundDisabled}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonBackgroundDisabled}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="BorderBrush">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonBorderBrushDisabled}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OuterEllipse" Storyboard.TargetProperty="Stroke">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonOuterEllipseStrokeDisabled}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OuterEllipse" Storyboard.TargetProperty="Fill">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonOuterEllipseFillDisabled}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckOuterEllipse" Storyboard.TargetProperty="Stroke">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonOuterEllipseCheckedStrokeDisabled}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckOuterEllipse" Storyboard.TargetProperty="Fill">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonOuterEllipseCheckedFillDisabled}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Fill">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonCheckGlyphFillDisabled}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Stroke">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource RadioButtonCheckGlyphStrokeDisabled}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                        <VisualStateGroup x:Name="CheckStates">
                            <VisualState x:Name="Checked">
                                <Storyboard>
                                    <DoubleAnimation Duration="0" Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Opacity" To="1"/>
                                    <DoubleAnimation Duration="0" Storyboard.TargetName="OuterEllipse" Storyboard.TargetProperty="Opacity" To="0"/>
                                    <DoubleAnimation Duration="0" Storyboard.TargetName="CheckOuterEllipse" Storyboard.TargetProperty="Opacity" To="1"/>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Unchecked"/>
                            <VisualState x:Name="Indeterminate"/>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <Grid Height="32" VerticalAlignment="Top">
                        <Ellipse x:Name="OuterEllipse" Fill="{StaticResource RadioButtonOuterEllipseFill}" Height="20" StrokeThickness="{ThemeResource RadioButtonBorderThemeThickness}" Stroke="{TemplateBinding BorderBrush}" UseLayoutRounding="False" Width="20"/>
                        <Ellipse x:Name="CheckOuterEllipse" Fill="{ThemeResource RadioButtonOuterEllipseCheckedFill}" Height="20" Opacity="0" StrokeThickness="{ThemeResource RadioButtonBorderThemeThickness}" Stroke="{TemplateBinding BorderBrush}" UseLayoutRounding="False" Width="20"/>
                        <Ellipse x:Name="CheckGlyph" Fill="{TemplateBinding BorderBrush}" Height="10" Opacity="0" Stroke="{ThemeResource RadioButtonCheckGlyphStroke}" UseLayoutRounding="False" Width="10"/>
                    </Grid>
                    <ContentPresenter x:Name="ContentPresenter" AutomationProperties.AccessibilityView="Raw" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" ContentTransitions="{TemplateBinding ContentTransitions}" Grid.Column="1" Foreground="{TemplateBinding Foreground}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" TextWrapping="Wrap" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

我从默认样式所做的更改是：

• 将OuterEllipse的{​​{1}}设为Stroke
• 将{TemplateBinding BorderBrush}的{​​{1}}设为CheckOuterEllipse
• 将Stroke的{​​{1}}设为{TemplateBinding BorderBrush}

结果如下：

然而，当指针位于CheckGlyph上方并按下时，可以通过更改默认的黑色来改善这一点。这可以在Fill中的每个{TemplateBinding BorderBrush}中完成。

当然，您不能忘记将样式应用于RadioButton：

VisualState