C# Avalonia 12- Drawing - VisualBrush

VisualBrush.axaml代码

<Window xmlns="https://github.com/avaloniaui"
        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"
        Height="300" Width="300"
        x:Class="AvaloniaUI.VisualBrush"
        Title="VisualBrush">
    <StackPanel Margin="3">
        <Button Name="cmd" Margin="3" Padding="5">Is this a real button?</Button>
        
        <Rectangle Margin="3" Height="{Binding #cmd.Bounds.Height}">
            <Rectangle.Fill>
                <VisualBrush Visual="{Binding #cmd}"></VisualBrush>
            </Rectangle.Fill>
        </Rectangle>

        <Rectangle Margin="3" Height="50">
            <Rectangle.Fill>
                <VisualBrush Visual="{Binding #cmd}"></VisualBrush>
            </Rectangle.Fill>
        </Rectangle>

        <Rectangle Margin="3" Height="150">
            <Rectangle.Fill>
                <VisualBrush Visual="{Binding #cmd}"></VisualBrush>
            </Rectangle.Fill>
        </Rectangle>
    </StackPanel>
</Window>

VisualBrush.axaml.cs代码

using Avalonia;
using Avalonia.Controls;
using Avalonia.Markup.Xaml;

namespace AvaloniaUI;

public partial class VisualBrush : Window
{
    public VisualBrush()
    {
        InitializeComponent();
    }
}

运行效果