Avalonia的马赛克背景的实现——定义笔刷资源

1. 找个地方定义一个马赛克笔刷

    <DrawingBrush x:Key="MosaicBrush" TileMode="Tile" Stretch="Uniform" DestinationRect="0,0,20,20">
        <DrawingBrush.Drawing>
            <DrawingGroup>
                <DrawingGroup.Children>
                    <GeometryDrawing Brush="White">
                        <GeometryDrawing.Geometry>
                            <RectangleGeometry Rect="0,0,10,10"/>
                        </GeometryDrawing.Geometry>
                    </GeometryDrawing>
                    <GeometryDrawing Brush="#CFBFBFBF">
                        <GeometryDrawing.Geometry>
                            <RectangleGeometry Rect="0,0,5,5"/>
                        </GeometryDrawing.Geometry>
                    </GeometryDrawing>
                    <GeometryDrawing Brush="#CFBFBFBF">
                        <GeometryDrawing.Geometry>
                            <RectangleGeometry Rect="5,5,5,5"/>
                        </GeometryDrawing.Geometry>
                    </GeometryDrawing>
                </DrawingGroup.Children>
            </DrawingGroup>
        </DrawingBrush.Drawing>
    </DrawingBrush>

2. 在需要的控件背景上直接使用该资源

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:vm="using:AvaloniaApplication1.ViewModels"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:views="clr-namespace:AvaloniaApplication1.Views"
        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
        x:Class="AvaloniaApplication1.Views.MainWindow"
        Background="{StaticResource MosaicBrush}"
        x:DataType="vm:MainWindowViewModel"
        Icon="/Assets/avalonia-logo.ico"
        Title="AvaloniaApplication1">

    <Design.DataContext>
        <vm:MainWindowViewModel/>
    </Design.DataContext>
    

</Window>