那些遇到过的问题

改变后退按钮的颜色

Ner*_*ing 1 winrt-xaml

我试图更改WinRT中的一些默认后退按钮,但我遇到了麻烦.这是StandardStyles.xaml中的xaml

<!--
        BackButtonStyle is used to style a Button for use in the title area of a page.  Margins appropriate for
        the conventional page layout are included as part of the style.
    -->
    <Style x:Key="BackButtonStyle" TargetType="Button">
        <Setter Property="MinWidth" Value="0"/>
        <Setter Property="Width" Value="48"/>
        <Setter Property="Height" Value="48"/>
        <Setter Property="Margin" Value="36,0,36,36"/>
        <Setter Property="VerticalAlignment" Value="Bottom"/>
        <Setter Property="FontFamily" Value="Segoe UI Symbol"/>
        <Setter Property="FontWeight" Value="Normal"/>
        <Setter Property="FontSize" Value="56"/>
        <Setter Property="AutomationProperties.AutomationId" Value="BackButton"/>
        <Setter Property="AutomationProperties.Name" Value="Back"/>
        <Setter Property="AutomationProperties.ItemType" Value="Navigation Button"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="Button">
                    <Grid x:Name="RootGrid">
                        <Grid Margin="-1,-16,0,0">
                            <TextBlock x:Name="BackgroundGlyph" Text="&#xE0A8;" Foreground="{StaticResource BackButtonBackgroundThemeBrush}"/>
                            <TextBlock x:Name="NormalGlyph" Text="{StaticResource BackButtonGlyph}" Foreground="{StaticResource BackButtonForegroundThemeBrush}"/>
                            <TextBlock x:Name="ArrowGlyph" Text="&#xE0A6;" Foreground="{StaticResource BackButtonPressedForegroundThemeBrush}" Opacity="0"/>
                        </Grid>
                        <Rectangle
                            x:Name="FocusVisualWhite"
                            IsHitTestVisible="False"
                            Stroke="{StaticResource FocusVisualWhiteStrokeThemeBrush}"
                            StrokeEndLineCap="Square"
                            StrokeDashArray="1,1"
                            Opacity="0"
                            StrokeDashOffset="1.5"/>
                        <Rectangle
                            x:Name="FocusVisualBlack"
                            IsHitTestVisible="False"
                            Stroke="{StaticResource FocusVisualBlackStrokeThemeBrush}"
                            StrokeEndLineCap="Square"
                            StrokeDashArray="1,1"
                            Opacity="0"
                            StrokeDashOffset="0.5"/>

                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="CommonStates">
                                <VisualState x:Name="Normal" />
                                <VisualState x:Name="PointerOver">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BackgroundGlyph" Storyboard.TargetProperty="Foreground">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource BackButtonPointerOverBackgroundThemeBrush}"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="NormalGlyph" Storyboard.TargetProperty="Foreground">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource BackButtonPointerOverForegroundThemeBrush}"/>
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Pressed">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BackgroundGlyph" Storyboard.TargetProperty="Foreground">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource BackButtonForegroundThemeBrush}"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <DoubleAnimation
                                            Storyboard.TargetName="ArrowGlyph"
                                            Storyboard.TargetProperty="Opacity"
                                            To="1"
                                            Duration="0"/>
                                        <DoubleAnimation
                                            Storyboard.TargetName="NormalGlyph"
                                            Storyboard.TargetProperty="Opacity"
                                            To="0"
                                            Duration="0"/>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Disabled">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Visibility">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                            <VisualStateGroup x:Name="FocusStates">
                                <VisualState x:Name="Focused">
                                    <Storyboard>
                                        <DoubleAnimation
                                            Storyboard.TargetName="FocusVisualWhite"
                                            Storyboard.TargetProperty="Opacity"
                                            To="1"
                                            Duration="0"/>
                                        <DoubleAnimation
                                            Storyboard.TargetName="FocusVisualBlack"
                                            Storyboard.TargetProperty="Opacity"
                                            To="1"
                                            Duration="0"/>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Unfocused" />
                                <VisualState x:Name="PointerFocused" />
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
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我只是想为每个州设置颜色为黑色.如何在保持"Metro"箭头的同时做到这一点？

Mar*_*cze 5

有两种可能的不同方法.

方法1:创建特定样式

最简单的解决方案是将颜色直接设置为Style所需的硬编码值,如下面的代码所示,这会产生一个黑色按钮:

<Style x:Key="BackButtonStyleBlack" TargetType="Button">
    <Setter Property="MinWidth" Value="0"/>
    <Setter Property="Width" Value="48"/>
    <Setter Property="Height" Value="48"/>
    <Setter Property="Margin" Value="36,0,36,36"/>
    <Setter Property="VerticalAlignment" Value="Bottom"/>
    <Setter Property="FontFamily" Value="Segoe UI Symbol"/>
    <Setter Property="FontWeight" Value="Normal"/>
    <Setter Property="FontSize" Value="56"/>
    <Setter Property="AutomationProperties.AutomationId" Value="BackButton"/>
    <Setter Property="AutomationProperties.Name" Value="Back"/>
    <Setter Property="AutomationProperties.ItemType" Value="Navigation Button"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="Button">
                <Grid x:Name="RootGrid">
                    <Grid Margin="-1,-16,0,0">
                        <TextBlock x:Name="BackgroundGlyph" Text="&#xE0A8;" Foreground="{StaticResource BackButtonBackgroundThemeBrush}"/>
                        <TextBlock x:Name="NormalGlyph" Text="{StaticResource BackButtonGlyph}" Foreground="Black"/>
                        <TextBlock x:Name="ArrowGlyph" Text="&#xE0A6;" Foreground="White" Opacity="0"/>
                    </Grid>
                    <Rectangle
                    x:Name="FocusVisualWhite"
                    IsHitTestVisible="False"
                    Stroke="{StaticResource FocusVisualWhiteStrokeThemeBrush}"
                    StrokeEndLineCap="Square"
                    StrokeDashArray="1,1"
                    Opacity="0"
                    StrokeDashOffset="1.5"/>
                    <Rectangle
                    x:Name="FocusVisualBlack"
                    IsHitTestVisible="False"
                    Stroke="{StaticResource FocusVisualBlackStrokeThemeBrush}"
                    StrokeEndLineCap="Square"
                    StrokeDashArray="1,1"
                    Opacity="0"
                    StrokeDashOffset="0.5"/>

                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualState x:Name="Normal" />
                            <VisualState x:Name="PointerOver">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BackgroundGlyph" Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource BackButtonPointerOverBackgroundThemeBrush}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="NormalGlyph" Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="Black"/>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Pressed">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BackgroundGlyph" Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="Black"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <DoubleAnimation
                                    Storyboard.TargetName="ArrowGlyph"
                                    Storyboard.TargetProperty="Opacity"
                                    To="1"
                                    Duration="0"/>
                                    <DoubleAnimation
                                    Storyboard.TargetName="NormalGlyph"
                                    Storyboard.TargetProperty="Opacity"
                                    To="0"
                                    Duration="0"/>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Disabled">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Visibility">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                        <VisualStateGroup x:Name="FocusStates">
                            <VisualState x:Name="Focused">
                                <Storyboard>
                                    <DoubleAnimation
                                    Storyboard.TargetName="FocusVisualWhite"
                                    Storyboard.TargetProperty="Opacity"
                                    To="1"
                                    Duration="0"/>
                                    <DoubleAnimation
                                    Storyboard.TargetName="FocusVisualBlack"
                                    Storyboard.TargetProperty="Opacity"
                                    To="1"
                                    Duration="0"/>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Unfocused" />
                            <VisualState x:Name="PointerFocused" />
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
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这会在SeaGreen背景上产生以下结果.
正常
在此输入图像描述

PointerOver
在此输入图像描述

追问
在此输入图像描述

方法2:覆盖主题画笔

另一种解决方案是覆盖内置样式使用的主题画笔.您必须在App.xaml文件中执行此操作,如下所示:

<Application.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>

            <!-- 
                Styles that define common aspects of the platform look and feel
                Required by Visual Studio project and item templates
                -->
            <ResourceDictionary Source="Common/StandardStyles.xaml"/>
        </ResourceDictionary.MergedDictionaries>

        <SolidColorBrush x:Key="BackButtonForegroundThemeBrush" Color="Black" />
        <SolidColorBrush x:Key="BackButtonPressedForegroundThemeBrush" Color="White" />
        <SolidColorBrush x:Key="BackButtonPointerOverForegroundThemeBrush" Color="Black" />

    </ResourceDictionary>
</Application.Resources>
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您可以BackButtonStyle在页面上使用正常样式:

<Grid Background="SeaGreen">
    <Button Style="{StaticResource BackButtonStyle}" />
</Grid>
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这产生与其他方法相同的结果,代码少得多.最大的区别在于此解决方案使用该样式更改了每个按钮的颜色方案,而这只能在App.xaml中全局完成,并且不能在每页上使用.

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