将自定义样式添加到Mahapps.Metro现有样式

Question

我使用MahApps.Metro 。 在设置指南中，它会告诉您在App.xaml中包含一些代码。 所以我做了。

现在我希望能够为它添加自己的样式 。 例如，这包括默认情况下具有边框的所有窗口。

但这不起作用。 边框不适用。 我知道如何在不使用MahApps.Metro时设置样式，但有了它，我无法兼顾两者。

这有什么不对？

<Application x:Class="ProjectName.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             StartupUri="Windows/MainWindow.xaml">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colors.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Blue.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseLight.xaml" />
                <!-- This is what I added -->
                <ResourceDictionary xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro">
                    <Style TargetType="Controls:MetroWindow">
                        <Setter Property="BorderThickness" Value="1" />
                        <Setter Property="BorderBrush" Value="{DynamicResource AccentColorBrush}" />
                    </Style>
                </ResourceDictionary>
                <!-------------------------->
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>

Answer 1

您忘记了使用BasedOn继承该样式：

<ResourceDictionary xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro">
    <Style TargetType="Controls:MetroWindow"
           BasedOn="{StaticResource {x:Type Controls:MetroWindow}}">
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="BorderBrush" Value="{DynamicResource AccentColorBrush}" />
    </Style>
</ResourceDictionary>

编辑

经过测试后，我的第一个答案并不正确。 你必须设置一个x:Key并在每个MetroWindow xaml中使用这个键。

<Style x:Key="CustomGlobalMetroWindow"
        TargetType="{x:Type Controls:MetroWindow}"
        BasedOn="{StaticResource {x:Type Controls:MetroWindow}}">
    <Setter Property="BorderThickness"
            Value="1" />
    <Setter Property="BorderBrush"
            Value="Purple" />
</Style>

用法

<Controls:MetroWindow x:Class="Demo"
                      Style="{DynamicResource CustomGlobalMetroWindow}" />

希望有所帮助！

Answer 2

我最终这样做了：

较少的错误和更懒惰友好

public partial class App : Application
{
    protected override void OnStartup(StartupEventArgs e)
    {
        ThemeManager.ChangeAppStyle(this,
                                    ThemeManager.GetAccent("Amber"),
                                    ThemeManager.GetAppTheme("BaseDark"));

        var allTypes = typeof(App).Assembly.GetTypes();
        var filteredTypes = allTypes.Where(d =>
            typeof(MetroWindow).IsAssignableFrom(d)
            && typeof(MetroWindow) != d
            && !d.IsAbstract).ToList();

        foreach (var type in filteredTypes)
        {
            var defaultStyle = this.Resources["MetroWindowDefault"];
            this.Resources.Add(type, defaultStyle);
        }

        base.OnStartup(e);
    }
}