c# - 使用 WPF 为多个动态皮肤字典创建别名颜色定义

Question

我正在尝试在大型 WPF 应用程序中设置主题框架。目前我们找到的解决方案是为每个调色板创建单独的 .xaml 文件，如下所示:

<LightColors.xaml>
<Color x:Key="MainPanelColor">Aqua</Color>
<Color x:Key="MainItemColor">Orange</Color>
<SolidColorBrush x:Key="MainPanelBrush" Color="{StaticResource MainPanelColor}" />
<SolidColorBrush x:Key="MainItemBrush"  Color="{StaticResource MainItemColor}" />

然后 UI 会像这样引用这些项目:

<Textblock Foreground="{DynamicResource MainItemBrush}"/>

在 C# 中，调色板会在运行时更改。该主题框架完成了允许在运行时更改主题的任务。

问题:我想在 UI 和颜色之间创建一个层，以便调色板颜色可以链接到整个 UI 中使用的大量颜色定义列表。我发现唯一可行的解​​决方案是添加这样的文件:

<ColorDefinitions.xaml>
<DynamicResource x:Key="Textblock_SetupPage_Foreground" ResourceKey="MainItemBrush" />
<DynamicResource x:Key="SecondDefinition" ResourceKey="MainItemBrush" />

然后像这样在 UI 中引用这个新资源:

<Textblock Foreground="{StaticResource Textblock_SetupPage_Foreground}" />

不过，这个解决方案并不完全有效。它只允许单个 UI 元素使用 DynamicResources 之一，如“Textblock_SetupPage_Foreground”，并且将 Textblock 引用更改为 DynamicResource 会产生错误。我怎样才能完成这个任务？

Answer 1

不太确定这是否能解决您的问题，但我可以向您展示我如何在我们的 LOB 中实现蒙皮。示例解决方案由两个程序集和示例应用程序组成。

MyCustomControlLibrary 定义颜色和画笔以及示例自定义控件。颜色和画笔可以进一步分离到一个额外的组件中。

MySkinsLibrary 定义皮肤并使用 MyControlLibrary 中的定义(资源)。

WpfSkinTestApp 使用皮肤并间接使用 MyCostumControlLibrary。

WPFSkinning Test Solution

颜色.xaml:

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:local="clr-namespace:MyCustomControlLibrary">
<Color x:Key="MyDarkColor">#FF123456</Color>
<Color x:Key="MyLightColor">#FF456789</Color>
<Color x:Key="MyNeutralColor">#FF666666</Color>

画笔.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:local="clr-namespace:MyCustomControlLibrary">
<ResourceDictionary.MergedDictionaries>
    <ResourceDictionary Source="/MyCustomControlLibrary;component/ResourceDictionaries/Colors.xaml"/>
</ResourceDictionary.MergedDictionaries>
<SolidColorBrush x:Key="MyDarkColorBrush" Color="{StaticResource MyDarkColor}"/>
<SolidColorBrush x:Key="MyLightColorBrush" Color="{StaticResource MyLightColor}"/>
<SolidColorBrush x:Key="MyNeutralColorBrush" Color="{StaticResource MyNeutralColor}"/>

通用.xaml

<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:MyCustomControlLibrary">
<ResourceDictionary.MergedDictionaries>
    <ResourceDictionary Source="/MyCustomControlLibrary;component/ResourceDictionaries/Brushes.xaml"/>
</ResourceDictionary.MergedDictionaries>
<Style TargetType="{x:Type local:MyCustomControl}">
    <Setter Property="Background" Value="{StaticResource MyNeutralColorBrush}"/>
    <Setter Property="BorderBrush" Value="White"/>
    <Setter Property="BorderThickness" Value="6"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type local:MyCustomControl}">
                <Border Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}">

                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

深色皮肤.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:local="clr-namespace:MySkinsLibrary.Skins"
                xmlns:customControls="clr-namespace:MyCustomControlLibrary;assembly=MyCustomControlLibrary">
<ResourceDictionary.MergedDictionaries>
    <ResourceDictionary Source="/MyCustomControlLibrary;component/Themes/Generic.xaml"/>
</ResourceDictionary.MergedDictionaries>

<Style x:Key="MyTextBlockStyle" TargetType="TextBlock">
    <Setter Property="Background" Value="Gray"/>
    <Setter Property="Foreground" Value="{StaticResource MyDarkColorBrush}"/>
</Style>

<Style x:Key="MyCustomControlStyle" TargetType="{x:Type customControls:MyCustomControl}" BasedOn="{StaticResource {x:Type customControls:MyCustomControl}}">
    <Setter Property="Background" Value="{StaticResource MyDarkColorBrush}"/>
</Style>

LightSkin.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:local="clr-namespace:MySkinsLibrary.Skins"
                xmlns:customControls="clr-namespace:MyCustomControlLibrary;assembly=MyCustomControlLibrary">
<ResourceDictionary.MergedDictionaries>
    <ResourceDictionary Source="/MyCustomControlLibrary;component/Themes/Generic.xaml"/>
</ResourceDictionary.MergedDictionaries>

<Style x:Key="MyTextBlockStyle" TargetType="TextBlock">
    <Setter Property="Background" Value="Gray"/>
    <Setter Property="Foreground" Value="{StaticResource MyLightColorBrush}"/>
</Style>

<Style x:Key="MyCustomControlStyle" TargetType="{x:Type customControls:MyCustomControl}" BasedOn="{StaticResource {x:Type customControls:MyCustomControl}}">
    <Setter Property="Background" Value="{StaticResource MyLightColorBrush}"/>
</Style>

在您的应用程序中，您可以在 app.xaml 中使用不同的外观，如下所示: (出于设计目的)

<Application x:Class="WpfSkinTestApp.App"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:local="clr-namespace:WpfSkinTestApp"
         StartupUri="MainWindow.xaml">
<Application.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="pack://application:,,,/MySkinsLibrary;component/Skins/LightSkin.xaml"/>
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Application.Resources>

并在运行时更改它，例如像这样:

private void RadioButton_Checked(object sender, RoutedEventArgs e)
    {
        string skinName = "LightSkin";

        if (((RadioButton)sender).Name == "DarkSkin")
        {
            skinName = "DarkSkin";
        }

        ResourceDictionary resources = new ResourceDictionary();
        resources.Source = new Uri($"pack://application:,,,/MySkinsLibrary;component/Skins/{skinName}.xaml");
        Application.Current.Resources = resources;
    }

为了完整起见，这是测试应用程序的主窗口:

<Window x:Class="WpfSkinTestApp.MainWindow"
    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:customControls="clr-namespace:MyCustomControlLibrary;assembly=MyCustomControlLibrary"
    xmlns:local="clr-namespace:WpfSkinTestApp"
    mc:Ignorable="d"
    Title="MainWindow" Height="350" Width="525"
    Background="{StaticResource MyNeutralColorBrush}">
<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition/>
        <ColumnDefinition/>
        <ColumnDefinition/>
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition/>
        <RowDefinition Height="Auto"/>
        <RowDefinition/>
        <RowDefinition/>
    </Grid.RowDefinitions>
    <TextBlock Grid.Column="1"
               Grid.Row="1"
               Text="Example Colors"
               Style="{DynamicResource MyTextBlockStyle}"/>
    <customControls:MyCustomControl Grid.Column="1"
                                    Grid.Row="2"
                                    Style="{DynamicResource MyCustomControlStyle}"/>
    <StackPanel Grid.Column="2"
                Grid.Row="2"
                Margin="24"                    >
        <RadioButton x:Name="LightSkin" GroupName="1" Content="Light Skin" IsChecked="True" Checked="RadioButton_Checked"/>
        <RadioButton x:Name="DarkSkin" GroupName="1" Content="Dark Skin" Checked="RadioButton_Checked"/>
    </StackPanel>
</Grid>

如果这是您要找的，请告诉我。