patcher/Patcher/PatchGenerator/Views/PatchGenerationView.axaml

<UserControl 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"
             xmlns:model="using:PatchGenerator.Models"
             xmlns:cc="using:PatchGenerator.CustomControls"
             xmlns:att="using:PatchGenerator.AttachedProperties"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="PatchGenerator.Views.PatchGenerationView">

  <UserControl.Styles>
    <StyleInclude Source="/Assets/Styles.axaml"/>
  </UserControl.Styles>
  
  <Grid RowDefinitions="AUTO,*,AUTO,AUTO,AUTO">

    <ItemsControl Items="{Binding PatchItemLegendCollection}">
      
      <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
          <StackPanel Orientation="Horizontal" Grid.Column="1"
                      HorizontalAlignment="Center"
                      Margin="10"
                      Spacing="30"
                      />
        </ItemsPanelTemplate>
      </ItemsControl.ItemsPanel>
      
      <ItemsControl.ItemTemplate>
        <DataTemplate DataType="{x:Type model:PatchItem}">
          <StackPanel Orientation="Horizontal" Spacing="5">
            <Rectangle Fill="{Binding Color}" Height="10" Width="10"/>
            <TextBlock Text="{Binding Name}"/>
          </StackPanel>
        </DataTemplate>
      </ItemsControl.ItemTemplate>
      
    </ItemsControl>
    
    <ScrollViewer VerticalScrollBarVisibility="Auto" Grid.Row="1"
                  ScrollChanged="scrollChanged"
                  att:RandomBoolAttProp.RandomBool="{Binding AutoScroll}"
                  >
      <ItemsControl Items="{Binding PatchItemCollection}"
                    Background="Transparent"
                    >
        <ItemsControl.ItemTemplate>
          <DataTemplate DataType="{x:Type model:PatchItem}">
            <TextBlock Text="{Binding Name}"
                       TextWrapping="Wrap"
                       Foreground="{Binding Color}"
                       />
          </DataTemplate>
        </ItemsControl.ItemTemplate>
        
      </ItemsControl>
      
    </ScrollViewer>
    
    <ProgressBar Grid.Row="2" Value="{Binding PatchPercent}" Margin="10"
                 IsIndeterminate="{Binding IndeterminateProgress}"/>

    <Grid ColumnDefinitions="AUTO,*,AUTO" Grid.Row="3" Margin="10 0">
      <Label Content="{Binding ProgressMessage}"/>
      <Label Content="{Binding PatchPercent, StringFormat={}{0}%}" Grid.Column="2"/>
    </Grid>
    
    <CheckBox Content="AutoScroll" Grid.Row="4" HorizontalAlignment="Right" Margin="10"
              IsChecked="{Binding AutoScroll}"/>
    
    
  </Grid>
</UserControl>